Over the years, ethylene-diamine-tetra-acetate (EDTA) has been widely used for many purposes. However, there are inadequate phytoassessment studies conducted using EDTA in Vetiver grass. Hence, this study evaluates the phytoassessment (growth performance, accumulation trends, and proficiency of metal uptake) of Vetiver grass, Vetiveria zizanioides (Linn.) Nash in both single and mixed heavy metal (Cd, Pb, Cu, and Zn)—disodium EDTA-enhanced contaminated soil. The plant growth, metal accumulation, and overall efficiency of metal uptake by different plant (...) parts (lower root, upper root, lower tiller, and upper tiller) were thoroughly examined. The relative growth performance, metal tolerance, and phytoassessment of heavy metal in roots and tillers of Vetiver grass were examined. Metals in plants were measured using the flame atomic absorption spectrometry (F-AAS) after acid digestion. The root-tiller (R/T) ratio, biological concentration factor (BCF), biological accumulation coefficient (BAC), tolerance index (TI), translocation factor (TF), and metal uptake efficacy were used to estimate the potential of metal accumulation and translocation in Vetiver grass. All accumulation of heavy metals were significantly higher (p < 0.05) in both lower and upper roots and tillers of Vetiver grass for Cd + Pb + Cu + Zn + EDTA treatments as compared with the control. The single Zn + EDTA treatment accumulated the highest overall total amount of Zn (8068 ± 407 mg/kg) while the highest accumulation for Cu (1977 ± 293 mg/kg) and Pb (1096 ± 75 mg/kg) were recorded in the mixed Cd + Pb + Cu + Zn + EDTA treatment, respectively. Generally, the overall heavy metal accumulation trends of Vetiver grass were in the order of Zn >>> Cu > Pb >> Cd for all treatments. Furthermore, both upper roots and tillers of Vetiver grass recorded high tendency of accumulation for appreciably greater amounts of all heavy metals, regardless of single and/or mixed metal treatments. Thus, Vetiver grass can be recommended as a potential phytoextractor for all types of heavy metals, whereby its tillers will act as the sink for heavy metal accumulation in the presence of EDTA for all treatments. (shrink)

Three different types of low cost soil amendments, namely, EDTA, elemental S and N-fertilizer, were investigated with Vetiver grass, Vetiveria zizanioides (Linn.) Nash growing under highly mixed Cd–Pb contamination conditions. A significant increase (p < 0.05) in Cd and Pb accumulation were recorded in the shoots of all EDTA and N-fertilizer assisted treatments. The accumulation of Cd in 25 mmol EDTA/kg soil and 300 mmol N/kg soil showed relatively higher translocation factor (1.72 and 2.15) and percentage metal efficacy (...) (63.25 % and 68.22 %), respectively, compared to other treatments. However, it was observed that the increased application of elemental S may inhibit the availability of Pb translocation from soil-to-root and root-to-shoot. The study suggests that viable application of 25 mmol EDTA/kg, 300 mmol N/kg and 20 mmol S/kg soil have the potential to be used for soil amendment with Vetiver grass growing under contaminated mixed Cd–Pb soil conditions. (shrink)

The growth response, metal tolerance and phytoaccumulation properties of water spinach (Ipomoea aquatica) and okra (Abelmoschus esculentus) were assessed under different contaminated spiked metals: control, 50 mg Pb/kg soil, 50 mg Zn/kg soil and 50 mg Cu/kg soil. The availability of Pb, Zn and Cu metals in both soil and plants were detected using flame atomic absorption spectrometry. The concentration and accumulation of heavy metals from soil to roots and shoots (edible parts) were evaluated in terms of translocation (...) factor, accumulation factor and tolerance index. Okra recorded the highest accumulation of Pb (80.20 mg/kg) in its root followed by Zn in roots (35.70 mg/kg) and shoots (34.80 mg/kg) of water spinach, respectively. Different accumulation trends were observed with, Pb > Zn > Cu in okra and Zn > Pb > Cu in water spinach. Significant differences (p < 0.01) of Pb, Zn and Cu accumulation were found in both water spinach and okra cultivated among tested treatments. However, only the accumulation of Pb metal in the shoots of water spinach and okra exceeded the maximum permissible levels of the national Malaysian Food Act 1983 and Food Regulations 1985 ([2006]) as well as the international Codex Alimentarius Commission limits. This study has shown that both water spinach and okra have good potential as Pb and Zn phytoremediators. (shrink)

This study used a flame atomic absorption spectrometer (FAAS) and atomic fluorescence spec-trophotometer (AFS) to detect the concentrations of chromium (Cr), cadmium (Cd), lead (Pb), hy-drargyrum (Hg) and arsenic (As) in soils and three genotypes of vegetables in greenhouse, as well as analyzed the physical and chemical properties of soils, including soil pH, soil organic matter (OM), basic nutrients, electrical conductivity (EC) and cation exchange capacity (CEC) in Guan- zhong areas, Shaanxi province, China. The results showed that comparing to subsoil, (...) the sampled topsoil is enriched in Cr, Cd, Pb, As and Hg. Cd (0.83 - 3.17 mg·kg-1) and Hg (0.40 - 1.44 mg·kg-1) are exceeding the limited value stated in “the 2006 Greenhouse Vegetable Producing Environmental Quality Evaluation Standards” of 0.40 mg·kg-1 and 0.35 mg·kg-1 respectively. However, Nanzhuang greenhouse soil is within the limits. The heavy metal pollution index (HPI) of soil in Sanyuan (8.10) is the highest and in Dongzhang (4.23) is the lowest. The contents of Pb (0.201 - 0.376 mg·kg-1) were exceeding the limited value (0.20 mg·kg-1) in vegetables species, and Cd (0.0363 - 0.0572 mg·kg-1) in some place were also exceeding the limited value (0.05 mg·kg-1). Greenhouse soils were becoming acidified year after year; the ratios of N, P and K in soil were seriously imbalanced. According to the impacting factors, OM, pH, available P, EC and CEC have obviously effected the accumulation of Cr and Hg. However, there was not enough evidence for the effects of available nitrogen and available potassium. (shrink)

Tropical grasses are fast growing and often used for phytoremediation. Three different types of tropical grasses: Vetiver (V. zizanoides), Imperata (I. cylindrical) and Pennisetum (P. purpureum) tested in different growth media of spiked heavy metal contents under the glasshouse environment of RimbaIlmu for 60-day. The growth performance, metals tolerance and phyto-assessment of cadmium (Cd), lead (Pb), zinc (Zn) and copper (Cu) in shoots and roots were assessed using flame atomic absorption spectrometry (FAAS).Tolerance index (TI), translocation factor (TF), biological (...) accumulation coefficient (BAC), biological concentration factor (BCF), and uptake efficacy was applied to evaluate the metal translocation ability among all three grasses. All three grasses showed significantly higher (p<0.05) accumulation of the total heavy metals in the spiked metal treatment compared with other tested treatments. Vetiver accumulated remarkably higher total concentration of Cd (93.08 ± 3.81 mg/kg) and Zn (1284.00 ± 234.83 mg/kg) than both Imperata and Pennisetum. The overall trend of heavy metals accumulation for all three grasses followed the order of Zn>Pb>Cd>Cu. The results of study suggested that both Imperata and Pennisetum are commendable and potential phytoextractors for Zn as well as phytostabilizers for Cd, Pb and Cu, respectively. (shrink)

Tropical grasses are fast growing and often used for phytoremediation. Three different types of tropical grasses: Vetiver (V. zizanoides), Imperata (I. cylindrical) and Pennisetum (P. purpureum) tested in different growth media of spiked heavy metal contents under the glasshouse environment of RimbaIlmu for 60-day. The growth performance, metals tolerance and phyto-assessment of cadmium (Cd), lead (Pb), zinc (Zn) and copper (Cu) in shoots and roots were assessed using flame atomic absorption spectrometry (FAAS).Tolerance index (TI), translocation factor (TF), biological (...) accumulation coefficient (BAC), biological concentration factor (BCF), and uptake efficacy was applied to evaluate the metal translocation ability among all three grasses. All three grasses showed significantly higher (pPb> Cd >Cu. The results of study suggested that both Imperata and Pennisetum are commendable and potential phytoextractors for Zn as well as phytostabilizers for Cd, Pb and Cu, respectively. (shrink)

Wittgenstein’s comment that what can be shown cannot be said has a special resonance with visual representations of power in both Heavy Metal and Fundamentalist Christian communities. Performances at metal shows, and performances of ‘religious theatre’, share an emphasis on violence and destruction. For example, groups like GWAR and Cannibal Corpse feature violent scenes in stage shows and album covers, scenes that depict gory results of unrestrained sexuality that are strikingly like Halloween ‘Hell House’ show presented by (...) neo-Conservative, Fundamentalist Christian churches in the southeastern United States’ ‘Bible Belt’. One group may claim to celebrate violence, the other sees violence as a tool to both encourage ‘moral’ behaviour, and to show that the Christian church is able to ‘speak the language’ of young people who are fans of metal, gore, and horror. Explicit violence, in each case, signifies power relationships that are in transformation. Historically, medieval morality plays and morality cycles had been used as a pedagogical tool. In the modern-day context of fundamentalist religious education, these Hell House performances seek to exclude outsiders and solidify teen membership in the Christian community. Hell House performances are marketed to the young church members, and are seen as a way to reinvigorate conservative Fundamentalist Christianity. Women and girls routinely take part in, and often organize Hell House events. In the context of heavy metal, violent performances do not seek to exclude, but provide an outlet for a variety of socially unacceptable or unpopular feelings. In each context there is an apparent, if not actual, empowering of women who are willing to play particular kinds of roles. The use of violence and gore has a value beyond merely shocking the audience, it is arguably a way that some women find their voice, both for fundamentalist Christians and fundamentalist gore metal fans. (shrink)

This paper adopts two modeling tools, namely, multiple linear regression (MLR) and artificial neural networks (ANNs), to predict the concentrations of heavy metals (zinc, boron, and manganese) in surface waters of the Oued Inaouen watershed flowing towards Inaouen, using a set of physical-chemical parameters. XLStat was employed to perform multiple linear and nonlinear regressions, and Statista 10 was chosen to construct neural networks for modeling and prediction. The effectiveness of the ANN- and MLR-based stochastic models was assessed by the (...) determination coefficient (R²), the sum squared error (SSE) and a review of fit graphs. The results demonstrate the value of ANNs for prediction modeling. Drawing on supervised learning and back propagation, the ANN-based prediction models adopt an architecture of [18-15-1] for zinc, [18-11-1] for manganese, and [18-8-1] for boron, and perform effectively with a single cached layer. It was found that the MLR-based prediction models are substantially less accurate than those based on the ANNs. In addition, the physical-chemical parameters being investigated are nonlinearly correlated with the levels of heavy metals in the surface waters of the Oued Inaouen watershed flowing towards Inaouen. (shrink)

The Ganga is one of the most sacred and worshipped river of India, is regarded as the cradle of Indian civilization. Uttar Pradesh the largest state of India is blessed with the most holy and important river in its region but due to increased urbanization and industrialization this river is under intimidation of high water pollution. The major objectives of the present study were to investigate heavy metal's concentration in water and sediments of the River Ganga. Water and (...) sediments collected from different locations were analyzed for Iron (Fe), Chromium (Cr), Lead (Pb),Nickel(Ni) and Zinc(Zn). The concentration of these heavy metals in the study area indicates that the river is highly polluted. The possible sources of these heavy metal pollutants are diverse, originated from natural or anthropogenic sources and point sources. The concentrations determined were more than the maximum admissible and desirable limit when compared with the National and International organizations like WHO, USEPA. Exposure to heavy metals has been linked to chronic and acute toxicity developing retardation, neurotoxicity, kidney damage, various cancers, liver damage, lung damage, and fragile bones and even death in instances of very high exposure. (shrink)

Abstract The rapid growth of Indonesian Heavy Metal music, especially the Death Metal subgenre, since around the turn of the millennium, has been quite remarkable. Indonesia is now numerically the largest scene in the world. Man, the vocalist of Jasad, told the author that the provincial West Javanese city of Bandung had 128 active Death Metal bands as at February 2011. This chapter will discuss the cancellation of an April 2012 music festival held in the Bandung (...) hinterland by police halfway through the festival, and explain how and why it took place. Police became nervous and worried about Heavy Metal shows following the deaths of eleven concertgoers, due to a crowd crush, at a Beside album launch in Bandung in 2008. The chapter analyses the “maternal rage” of a band member’s mother (also a policewoman at the scene) from the perspective of grounded gendered cosmopolitanism. Lastly, a short case study of Sickles, a young band from the religiously-conservative Madura Island, shows the problems that young bands experience plus the type of global underground support which they can attract. (shrink)

It has recently been argued that metal’s ‘heaviness’ is conceptually inarticulable. I argue, on the contrary, that ‘heaviness’ is a matter of inaccessibility—the ‘something more’ that makes metal ‘heavy’ is actually something less: less auditory processing fluency. Like profound literature, metal resists, but also invites and rewards, interpretation. I argue that understanding ‘heaviness’ in terms of auditory processing fluency allows us to make sense of a number of otherwise puzzling features of the music, and to articulate (...) a unifying gestalt for the genre. (shrink)

Various types of plant species have been extensively used for heavy metals phyto-remediation without taking into consideration its tolerance threshold. In this study, Vetiver grass, Vetiveria zizanioides (Linn.) Nash was evaluated under five different sets of contaminated spiked cadmium (5Cd, 10Cd, 50Cd, 100Cd and 150Cd mg/kg) and lead (50Pb, 100Pb, 200Pb, 400Pb and 800Pb mg/kg) concentration levels in soil. The growth performance, metal tolerance and phyto-assessment of Cd and Pb in the roots and tillers were assessed using flame (...) atomic absorption spectrometry (FAAS). Tolerance index (TI), translocation factor (TF), biological transfer factor (BTF), biological accumulation coefficient (BAC) and metal uptake efficacy were used to determine the Cd and Pb translocation capability in Vetiver grass. Significantly higher (p<0.05) accumulation of Cd and Pb was recorded in the roots of all spiked treatments. Furthermore, strong and significantly positive correlations were exhibited between the increased levels of spiked heavy metal concentrations with both Cd (r=0.975) and Pb (r=0.952) accumulations. The results of this study showed Vetiver grass as an effective phyto-stabilizer for both Cd and Pb. Nevertheless, the growth of Vetiver grass was restricted when the tolerance threshold of 100 mg/kg (dry weight basis) Cd was exceeded in the contaminated soil. (shrink)

This article was motivated by the avalanche of finance spent annually on addressing the harm caused by corrosion on household wares and buildings, industrial machines and facilities, hospital equipment and many other establishment of man in the universe. Corrosion is a universal phenomenon referred to as the deterioration of metallic material. Metal alloys like stainless steel and aluminium are extensively used in household utensils for their durability, affordability and corrosion resistance. However, these materials can leach heavy metals such (...) as chromium, nickel, iron, and aluminium into food, posing serious health challenges. Stainless steel, despite its corrosion resistance, releases harmful metals when exposed to acidic foods, while aluminium utensils corrode and release harmful elements under certain conditions too. Hence, this article was aimed at examining the historical background of corrosion, the causes of corrosion in household wares and utensils, its impact especially on human health and economy, and the potential remedies. The findings indicated that acidic foods and prolonged storage increase metal leaching. Health concerns included increased risks of anemia, dementia, and osteomalacia due to excessive metal accumulation in the body. Mitigation strategies included using anodized aluminium, minimizing storage time of acidic foods in metal containers, and increasing public awareness about the potential health risks. Proper maintenance and selection of utensils could significantly reduce the hazards associated with metal leaching. (shrink)

Air pollutants pose a threat to biodiversity throughout the world. This study was conducted to evaluate atmospheric element accumulation in Isparta city, including Gölcük Nature Park, located in the Western Mediterranean Region of Turkey. It is aimed to determine the air quality and potential pollutant sources in the region through lichen biomonitoring. Specimens of the epiphytic foliose lichen Physcia aipolia (Erh. ex Humb.) Fürnr. were sampled from 14 sites in the study area and analyzed by ICP-MS with reference material in (...) order to detect 11 trace elements; Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, V, and Zn. The spatial distribution of these airborne elements in the study area was mapped. The results showed that the elemental sequence in terms of average concentrations measured was as follows: Ni >Cr >V >Fe >As >Al >Zn >Cu> >Cd >Mn >Pb. The results of cluster analyses of the elemental data indicated that the 3 major contaminants in the urban area were Cr, Ni, and V, probably due to the extensive use of coal in heating facilities and gasoline in vehicles. P. aipolia specimens accumulated maximal concentrations of As, Cr, Fe, Ni, and V in the northern and the southeastern localities surrounding the city, while Cd, Pb were most abundant in the eastern edge of Gölcük Nature Park. The pollution in Isparta city with heavy metal is worse than expected, mostly due to the extensive use of coal as fossil fuel. In addition, it seems to be associated with the city's topographic and climatic characteristics, e.g. inversion effects. (shrink)

Sources of soil contamination can exist in various types of conditions including in the form of semifluids. In this study, 3 different types of tropical plants, Acacia (Acacia mangium Willd), Mucuna (Mucuna bracteata DC. ex Kurz) and Vetiver (Vetiveria zizanioides L. Nash), were tested under different levels of soil-leachate conditions. The relative growth rate, metal tolerance, and phytoassessment of cadmium (Cd) and lead (Pb) accumulation in the roots and shoots were determined using flame atomic absorption spectrometry. Tolerance index, translocation (...) factor, metal accumulation ratio, and percentage metal efficacy were applied to assess the metal translocation ability among all the 3 types of plants. Significantly higher (P < .05) accumulation of Cd and Pb was exhibited in the roots and shoots of all 3 plants growing under the soil-leachate conditions. However, negative growth performance and plant withering were observed in both Acacia and Mucuna with increased application of higher soil-leachate levels. Vetiver accumulated remarkably higher total concentration of Cd (116.16-141.51 mg/kg) and Pb (156.37-365.27 mg/kg) compared with both Acacia and Mucuna. The overall accumulation trend of Cd and Pb in the 3 plants growing under the soil-leachate conditions was in the order of Vetiver > Acacia > Mucuna. The findings of the study suggest that Vetiver has great potential as Cd and Pb phytoremediator in soil-leachate conditions. (shrink)

The present investigation was undertaken to investigate the acute toxicity of cadmium, a heavy metal widely detected in the aquatic environment due to natural effects and anthropogenic activities, in freshwater teleost, Channa punctata (Bloch). The experiments for the bioassay were performed in semi-static test condition according to the standard guidelines. The behavioural changes in the fish were observed for all tested concentrations of the metal. The data obtained for bioassay were analyzed for median lethal concentrations (LC ) (...) of the metal by SPSS computer software. The LC 50 50 values, estimated by SPSS, with 95% confidence level were found to be:20.589 (18.326-23.221), 17.133 (14.840- 19.734), 11.815 (9.696 – 13.850) mg/L and 9.908 (7.635-12381) mg/L for cadmium chloride at 24, 48, 72 and 96 h exposure, respectively. (shrink)

d organic compounds that pose serious risks to aquatic ecosystems and human health. This study investigates the application of biochar as an effective treatment medium for textile wastewater. Biochar, a carbon-rich material produced through pyrolysis of organic matter, offers high surface area, porosity, and adsorption properties. We evaluated the efficacy of biochar in removing dyes and heavy metals from simulated textile effluent under varying conditions of contact time, pH, and biochar dosage. Results indicated that biochar significantly reduced dye concentration (...) and metal ions, with optimal removal rates achieved at specific pH levels and higher biochar amounts. Mechanistic studies suggested that adsorption, electrostatic interactions, and ion exchange were the primary removal processes. This research highlights the potential of biochar not only as a sustainable solution for textile effluent treatment but also as a means to recycle organic waste, contributing to a circular economy. Further investigations into the regeneration and reuse of biochar in wastewater treatment are recommended to enhance its practical applicability. (shrink)

Abstract: Global chemical contamination is an underexplored source of global catastrophic risks that is estimated to have low a priori probability. However, events such as pollinating insects’ population decline and lowering of the human male sperm count hint at some toxic exposure accumulation and thus could be a global catastrophic risk event if not prevented by future medical advances. We identified several potentially dangerous sources of the global chemical contamination, which may happen now or could happen in the future: autocatalytic (...) reactions, exposure to multiple subthreshold sources, and long-term unintended consequences, arising from both natural and bioengineered sources. We list several especially dangerous chemicals—dioxin, organiс compounds, and toxic heavy metals. We also discuss the features of such dangerous chemicals—molecules that can stay in the biosphere for a long time and affect it over time. We explore several social processes and scenarios where global chemical contamination becomes possible: large natural catastrophe like meteorite impact, supervolcano eruption, new ways of predicting properties of the chemicals via machine learning and their manufacturing via synthetic biology, uncontrolled “capitalistic” economic development with a corresponding large waste production, quick adoption of many chemicals with unknown long-term properties and unintended side-effects. These are all low probability, so work on other global catastrophic risks should be prioritized, but chemical risks could exacerbate other types of catastrophe contributing to social collapse. (shrink)

The present investigation has been designed to study the effect of sub lethal concentrations of Nickel on the serum metabolites of Channa punctatus after exposure to 45 days. The present study shows that serum metabolites such as glucose and protein were significantly decreased while lipid was significantly increased. Thus, the result provides an overview of the manipulation of fish, Channa punctatus as a biomarker of heavy metals through alternation in serum biochemical parameters.

Philosophy has a dirty little secret and it is this: a whole lot of philosophers have swallowed the mechanistic billiard ball deterministic view of human action—presumably because philosophy assumes that science demands it, and/or because modern attempts to articulate in what free will consists seem incoherent. This below-the-surface-purely-academic commitment to mechanistic determinism is a dirty little secret because an honest public commitment would render virtually all that is taught in philosophy departments incomprehensible. Can “lovers of wisdom” really continue to tolerate (...) such a heavy burden of hypocrisy? For it is maximally hypocritical, is it not, to teach ethics, or existentialism, or political philosophy, or critical thinking, or indeed to teach anything at all if one views the bodies of humans as entities determined by forces that are describable entirely under the auspices of physical/chemical laws. The only option, it would seem, to avoid such hypocrisy is to go out of business. After all, either base metal can be turned into gold, or it cannot. We found out long ago that it cannot, and so alchemy was rightly banished into the dustbin of history. Likewise, either philosophy can enhance the wisdom quotient of its disciples as its name implies, and thus override billiard ball mechanics, or it cannot. And if it cannot, it deserves to follow alchemy to an ignominious end. (shrink)

This research article was championed as a way of providing discourses pertaining to the concept of "Critical Realism (CR)" approach, which is amongst many othe forms of competing postmodern philosophical concepts for the engagement of dialogical discourses in the area of established econonetric methodologies for effective policy prescription in the economic science discipline. On the the whole, there is no doubt surrounding the value of empirical endeavours in econometrics to address real world economic problems, but equally so, the heavy (...) weighted use and reliance on mathematical contents as a way of justifying its scientific base seemed to be loosing traction of the intended focus of economics when it comes to confronting real world problems in the domain of social interaction. In this vein, the construction of mixed methods discourse(s), which favour that of CR philosophy is hereby suggested in this article as a way forward in confronting with issues raised by critics of mainstream economics and other professionals in the postmodern era. (shrink)

This study was performed on disseminated low-grade chromite ore, Gedarif State, Umm Saqata-Qala Elnahal, to treatment the ore by Heavy media separation (HMS) with low intensity magnetic separation (LIMS) for course fraction size (-212+75) μm and selective flocculation for chromite slimes (-75) μm. The ore of the study area is low grade contains 21.5% Cr2O3 with the liberation size of chromite mineral in the range (0.30-0.05) mm. The main gangue of the ore is mineral silicates as the Antigorite mineral. (...) The ore was crushed, ground, and then classified to tow fraction size (-212+75) μm and slimes (-75) μm. Fractions size (-212+75) μm contained 25.58% Cr2O3 was treated by HMS via Bromofrom mixed with carbon tetrachloride flowed by low intensity magnetic separator. HMS with LIMS obtained the highest recovery 82.52% and grade 46.62% Cr2O3 for chromite concentrate with 2.54 Cr/Fe. The slimes (-75) μm contained 22.17% Cr2O3 was treated by selective flocculation method. Optimum grade 42.71% Cr2O3 and recovery 37.10% for chromite concentrate, were achieved at sodium silicate concentration 100 mg/l, starch concentration 45 mg/l, pH=9, and solid percentage 5%. (shrink)

In this experimental investigation the Aluminium 6063 is treated with Aluminium Oxide (Al2O3) and Chicken Bone Ash (CBA). This Aluminium metal matrix composite is mixed at certain compositions and observed with the mechanical properties. Two main mechanical properties which includes Surface roughness and corrosion behavior is mainly focused in this research work. In this Research work aluminium hybrid metal matrix composite (AHMMC) is fabricated through stir casting process. Al6063 shows good mechanical properties and corrosion behavior changes, when (...) combined with reinforcements, Al2O3 and Chicken Bone Ash (CBA). Stir casting is an efficient cycle for the manufacture of aluminum hybrid composites. There are numerous boundaries in this cycle, which influence the behavior of corrosion and mechanical properties of the composites. Stir casting is a fluid state technique for the manufacture of composite materials, in which a scattered stage is blended in with a liquid network metal by methods for mechanical mixing. Stir Casting is the least difficult and the most financially savvy strategy for fluid state manufacture. Finally in this research work, when the compositions of each and every reinforcement increase, simultaneously the surface roughness of the composite also get increases. (shrink)

In this paper, a metal cutting machine position control have been designed and simulated using Matlab/Simulink Toolbox successfully. The open loop response of the system analysis shows that the system needs performance improvement. Static output feedback and full state feedback H 2 controllers have been used to increase the performance of the system. Comparison of the metal cutting machine position using static output feedback and full state feedback H 2 controllers have been done to track a set point (...) position using step and sine wave input signals and a promising results have been analyzed. (shrink)

The term 'covert mixed quotation' describes cases in which linguistic material is interpreted in the manner of mixed quotation — that is, used in addition to being mentioned — despite the superficial absence of any commonly recognized conventional devices indicating quotation. After developing a novel theory of mixed quotation, I show that positing covert mixed quotation allows us to give simple and unified treatments of a number of puzzling semantic phenomena, including the projective behavior of conventional (...) implicature items embedded in indirect speech reports and propositional attitude ascriptions, so-called 'c-monsters,' metalinguistic negation, metalinguistic negotiation, and 'in a sense' constructions. (shrink)

One of the key challenges of social policy in Poland in the early 21st century is to adapt its management to the requirements of a service economy. Essential conditions for the mixed economy of welfare have been already created after adjustments of the subsystems of national social policy during the first years of membership in the European Union since 2004. Labour market policies already include the relationships between providers from the public sector, the commercial sector, and the non-governmental sector. (...) However, the tasks and services of individual entities and institutions still lack coordination and integration. This paper focus on the examples of possibilities for their development by combining the activation policy with concepts of the governance and welfare mix. The paper presents the results of the author’s research on the implementation of welfare mix solutions in the field of professional activation of the unemployed people in Poland. Two case studies are included the implementation of outplacement programs that are based on the cooperation between different entities; and the cooperation between the public employment services and non-governmental employment agencies in the activation of people with disabilities in the labour market. Moreover, basic concepts of ongoing reforms of active labour market policies in Poland were discussed. The summary contains the practical recommendations and possible directions for further research in the field of integration of employment services. (shrink)

Conceptual engineering is the process of assessing and improving our conceptual repertoire. Some authors have claimed that introducing or revising concepts through conceptual engineering can go as far as expanding the realm of thinkable thoughts and thus enable us to form beliefs, hypotheses, wishes, or desires that we are currently unable to form. If true, this would allow conceptual engineers to contribute to solving stubborn problems – problems that cannot be solved with our current ways of thinking. We call this (...) kind of conceptual engineering heavy-duty conceptual engineering. As exciting as the idea of heavy-duty conceptual engineering sounds, it has never been developed or defended. In this paper, we pursue a two-fold goal. First, to offer a theory of heavy-duty conceptual engineering that distinguishes it from other kinds of conceptual engineering; second, to show that heavy-duty conceptual engineering is possible, both in theory and in practice, and to explain how it can be applied in the service of solving stubborn problems. The central idea is that heavy-duty conceptual engineering can enhance the semantic expressive power of a conceptual system by the use of bootstrapping processes. (shrink)

From the position of a simple employee of the Drobeta Turnu Severin Heavy Water Plant, as a quality assurance inspector, the head of the destructive and non-destructive control laboratories, and finally the head of the quality assurance service, I had the honor to participate, between 1983 and 1993, in the largest technical-scientific project in Romania at that time, which involved universities, countless research institutes, design institutes, factories and construction-assembly companies, which, forced to use exclusively Romanian materials and solutions, had (...) to research, innovate and implement, on a daily basis, unique technologies for Romania, and specific solutions for their improvement. In this paper I highlight the close collaboration between all these entities, which allowed the development of an important component of the Romanian nuclear program, and laid the foundations of scientific and technological knowledge for the entire further evolution of activities in the nuclear field, and not only. Although there are many books and articles on the history of heavy water in Romania, in this paper I approach this subject from a new point of view, emphasizing the close collaboration between universities, scientific and technological research institutes, design institutes, production factories of machinery and equipment, construction-assembly enterprises, and heavy water plant specialists, thus creating an informal community, even a school within which an unprecedented scientific and technological discipline was developed, and a special emulation for research and innovation . For this purpose, I also analyzed documents that have not been used in such studies until now. And all these aspects are discussed through the lens of a direct and active participant in the construction, putting into operation, and operation of the heavy water plant. In the case of heavy water produced in Romania, I will demonstrate in this paper that it corresponds to a paradigm in the sense of Thomas Kuhn from The Structure of Scientific Revolutions, having the specific characteristics and passing through all the phases specified by him in the case of a paradigm. -/- DOI: 10.58679/TW21689. (shrink)

This study’s objective was to understand Colombian adolescents’ experiences and preferences regarding access to sexual and reproductive health services (SRHS), either alone or accompanied. A mixed-method approach was used, involving a survey of 812 participants aged eleven to twenty-four years old and forty-five semi-structured interviews with participants aged fourteen to twenty-three. Previous research shows that adolescents prefer privacy when accessing SRHS and often do not want their parents involved. Such findings align with the longstanding tendency to frame the ethical (...) principle of autonomy as based on independence in decision-making. However, the present study shows that such a conceptualization and application of autonomy does not adequately explain Colombian adolescent participants’ preferences regarding access to SRHS. Participants shared a variety of preferences to access SRHS, with the majority of participants attaching great importance to having their parents involved, to varying degrees. What emerges is a more complex and non-homogenous conceptualization of autonomy that is not inherently grounded in independence from parental involvement in access to care. We thus argue that when developing policies involving adolescents, policymakers and health professionals should adopt a nuanced “relational autonomy” approach to better respect the myriad of preferences that Colombian (and other) adolescents may have regarding their access to SRHS. (shrink)

Notwithstanding diverse opinions and debates about mixing methods, mixed methods research (MMR) is increasingly being used in sport and exercise psychology. In this paper, we describe MMR trends within leading sport and exercise psychology journals and explore critical realism as a possible underpinning framework for conducting MMR. Our meta-study of recent empirical mixed methods studies published in 2017–2019 indicates that eight (36%) of the 22 MMR studies explicitly stated a paradigmatic position (five drew on pragmatism, two switched paradigms (...) between qualitative and quantitative elements of the study, and one was situated in relativist-interpretivism). The remaining 14 (64%) studies did not report their underpinning research philosophical assumptions. Evaluating the merits and limitations of these positions against critical realist assumptions suggests that several paradigmatic disagreements are potentially reconcilable. These include (a) maintaining that ontological and epistemological concerns are important for methodological integrity of a mixed methods study; (b) switching between paradigms in the same study is problematic; and (c) refuting the qualitative-quantitative incommensurability thesis, therefore allowing mixed methods research without compromising philosophical coherence. From a critical realist position, we suggest that both quantitative and qualitative designs are justifiable in a mixed methods study because (1) they help corroborate, refine, or refute plausible explanations of phenomena (epistemological), but (2) with different methodologies utilised to perform different tasks in the same research design related to different psycho-social system features (ontological). We call for a collaborative engagement by researchers across paradigmatic positions to work towards the advancement of methodological pluralism in our research community. (shrink)

Here, I explore a modernist aesthetics of death metal. First, I briefly describe a few themes that characterize some modern art, without any claim that they are necessary, sufficient, or exhaustive. The goal is to obtain a set of themes that might be set against similar themes characteristic of death metal. This is the task in the second half of the paper. In particular, I argue that (some) modernist art and death metal share themes centered on transgressively (...) breaking with the past, pursue their conception of the truth, eliminate elements in their art form to purity them, and attack the art/non-art or music/non-music distinction. I contend that centering on death metal vocals reflects these themes. Death metal growls, like some modernist art, transgresses on past vocal traditions, tells us important truths, eliminates traditional concepts/techniques of signing, and undermines the singing/noise distinction. (shrink)

According to what Birch (2022) calls the theory-heavy approach to investigating nonhuman-animal consciousness, we select one of the well-developed theories of consciousness currently debated within contemporary cognitive science and investigate whether animals exhibit the neural structures or cognitive abilities posited by that theory as sufficient for consciousness. Birch argues, however, that this approach is in general problematic because it faces what he dubs the dilemma of demandingness—roughly, that we cannot use theories that are based on the human case to (...) assess consciousness in nonhuman animals and vice versa. We argue here that, though this dilemma may problematize the application of many current accounts of consciousness to nonhuman animals, it does not challenge the use of standard versions of the higher-order thought theory (“HOTT”) of consciousness, according to which a creature is in a conscious mental state just in case it is aware of being in that state via a suitable higher-order thought (“HOT”). We show this in two ways. First, we argue that, unlike many extant theories of consciousness, HOTT is typically motivated by a commonsense, and more importantly, neutral condition on consciousness that applies to humans and animals alike. Second, we offer new empirical and theoretical reasons to think that many nonhuman animals possess the relevant HOTs necessary for consciousness. Considering these issues not only reveals the explanatory power of HOTT and some of its advantages over rival accounts, but also enables us to further extend and clarify the theory. (shrink)

This paper provides a critical review of the debate over the philosophical foundations of mixed methods research and examines the notion of philosophical foundations. It distinguishes axiology-oriented from ontology-oriented philosophical foundations. It also identifies three different senses of philosophical foundations of mixed methods research. The weak sense of philosophical foundations (e.g., pragmatism) merely allows the possibility of the integration of both quantitative and qualitative methods/data/designs. The moderate sense of philosophical foundations (e.g., transformativism) provide a good reason to use (...) mixed methods in (at least some) social scientific research. The strong sense of philosophical foundations (e.g., dialectical pluralism) justifies a normative thesis that mixed methods research should be encouraged in (at least some) social scientific research. (shrink)

The heavy water plant was established under the name of Combinatul Chimic Drobeta, by Decree 400/16.11.1979, under the Inorganic Products Industrial Center (CIPA) Râmnicu Vâlcea. The thermo-electric plant for supplying the heavy water factory with steam was decided to be located in Halânga village, three kilometers from the factory. The process water required for the factory was brought from the Danube, and the hydrogen sulphide used in the process was produced in the plant, through a specific technology, and (...) then compressed, liquefied and stored in special tanks. The works on the heavy water factory at Drobeta Turnu Severin started in 1979, based on a derogatory HCM. The equipment for the heavy water plant was purchased through the Industrial Center for Chemical and Refinery Equipment (CIUTCR). All equipment and facilities that transported hydrogen sulphide had to meet strict quality assurance conditions. (shrink)

Due to the special working conditions in the heavy water plant, an extensive research and program has been developed for the operational safety of the installations, based on specific action methodologies and in situ experimental programs for the evaluation of the long-term behavior of materials and installations. After December 1989, the operation of the modules was stopped for about three years, for the modernization of the technological equipment and the surveillance and environmental protection systems. In September 2015, the production (...) of heavy water was stopped and the plant staff was laid off. (shrink)

mixed bodies and mixed desires and pertinences.

I defend Pascal's Wager from a particular way of evading it, the mixed strategy approach. The mixed strategies approach suggests that Pascal's Wager does not obligate one to believe in God, because one can get the same infinite expected utility from other strategies besides the strategy of believing in God. I will show that while there's nothing technically wrong with the mixed strategy approach, rationality requires it to be applied in such a way that Pascal's Wager doesn't (...) lose any force. (shrink)

Two-tiered mixed theories of punishment hold that legislatures should act according to consequentialism, but the judiciary should act according to retributivism. A major motivation for these theories is wanting to preserve the idea that punishment is ultimately justified on consequentialist grounds, without falling prey to the Punishing the Innocent objection. Yet this benefit is illusory. While two-tiered mixed theories successfully avoid the Punishing the Innocent objection narrowly construed, they do not successfully escape the point behind it. This is (...) because cases can be constructed with the same problems as those used to describe the classic Punishing the Innocent objection, just bumped up to the legislature. (shrink)

Mixing methods is a well-known innovative meth- odologic proposal for research in the second half of the 20th century social sciences. Reading literature about it, I observed the aspect that justifies this paper: Authors of theoretical contributions on mixing methods recognized that this was known to be a practice already in use many centuries ago. Some of them even have re-examined the whole history of the scientific method to search precedents. They are however individual and theoretical precedents. I add in (...) this paper the practical projection of these and other methodological theories on people’s training from Greek classical times. My hypothesis is that liberal arts was the basic syllabus in Western -and westernized- educaion for more than a millennium in such a way that results of their training precisely involved to mixing methods. In return, to understand the liberal arts in the light of mixing methods shows new aspects of their historical interest. I study the theoretical basis of this syllabus from Cicero to Alcuin. More important for future research, I conclude that Alcuin’s thesis about the correspondence between the gifts of the Holy Spiritu and the seven liberal arts can be extended to the Aristotelian dianoethics habits and to Dilthey’s 20th-century sciences of mind. (shrink)

Given the sharp distinction that follows from Hume’s Fork, the proper epistemic status of propositions of mixed mathematics seems to be a mystery. On the one hand, mathematical propositions concern the relation of ideas. They are intuitive and demonstratively certain. On the other hand, propositions of mixed mathematics, such as in Hume’s own example, the law of conservation of momentum, are also matter of fact propositions. They concern causal relations between species of objects, and, in this sense, they (...) are not intuitive or demonstratively certain, but probable or provable. In this article, I argue that the epistemic status of propositions of mixed mathematics is that of matters of fact. I wish to show that their epistemic status is not a mystery. The reason for this is that the propositions of mixed mathematics are dependent on the Uniformity Principle, unlike the propositions of pure mathematics. (shrink)

Pascal’s Wager holds that one has pragmatic reason to believe in God, since that course of action has infinite expected utility. The mixed strategy objection holds that one could just as well follow a course of action that has infinite expected utility but is unlikely to end with one believing in God. Monton (2011. Mixed strategies can’t evade Pascal’s Wager. Analysis 71: 642–45.) has argued that mixed strategies can’t evade Pascal’s Wager, while Robertson (2012. Some mixed (...) strategies can evade Pascal’s Wager: a reply to Monton. Analysis 72: 295–98.) has argued that Monton is mistaken. We show that Monton is correct, highlight the crucial assumptions that he relies on, and shed some light on the role of mixed strategies in decision theory. (shrink)

A variety of philosophical positions have been proposed and developed to motivate, justify, and guide mixed methods research. This chapter provides a brief overview of the main positions in the debate over the philosophical foundations of mixed methods research. It shows that ‘philosophical foundations’ means differently while different positions provide ‘philosophical foundations’ in different senses. It also highlights the significance of the collaboration between researchers and philosophers in the examination of the philosophical foundations of mixed methods research.

This essay considers a mixed-effects modeling practice and its implications for the philosophical debate surrounding reductive explanation. Mixed-effects modeling is a species of the multilevel modeling practice, where a single model incorporates simultaneously two (or even more) levels of explanatory variables to explain a phenomenon of interest. I argue that this practice makes the position of explanatory reductionism held by many philosophers untenable because it violates two central tenets of explanatory reductionism: single-level preference and lower-level obsession.

This paper contributes to the project of articulating and defending the supra-Bayesian approach to judgment aggregation. I discuss three cases where a person is disposed to defer to two different experts, and ask how they should respond when they learn about the opinion of each. The guiding principles are that this learning should go by conditionalisation, and that they should aim to update on the evidence that the expert had updated on. But this doesn’t settle how the update on pairs (...) of experts should go, because we also need to know how the experts are related. I work through three examples showing how the results change given different prior beliefs about this relationship. (shrink)

It has proved challenging to account for the dual role that a directly quoted part of a 'that'-clause plays in so-called mixed quotation. The Davidsonian account, elaborated by Cappelen and Lepore, handles many cases well; but it fails to accommodate a crucial feature of mixed quotation: that the part enclosed in quotation marks is used to specify not what the quoter says when she utters it, but what the quoted speaker says when she utters it. Here I show (...) how the Davidsonian can do better. The proposal rests on the idea that mixed quotation involves deferred demonstration: a mixed quotati on specifies what the subject says partly by demonstrating the quoter's utterance of the unquoted part and partly by deferred-demonstrating the subject's utterance of the quotation-marked part. (shrink)

MMA fighting in a competition is not necessarily wrong and is often, as far as we can tell, permissible. Our argument has two premises. First, if an act does not infringe on anyone’s moral right or violate another side-constraint, then it is morally permissible. Second, MMA-violence does not infringe on anyone’s moral right or violate another side-constraint. The first premise rested on two assumptions. First, if a person does a wrong act, then he wrongs someone. Second, if one person wrongs (...) a second, then the first infringes on the second’s right. We then looked at Nicholas Dixon’s powerful Kantian argument that MMA fighting is wrong. (shrink)

In Plato's Laws, the Athenian Visitor says that the best constitution is a mixture of monarchy and democracy. This is the theoretical basis for the institutions of Magnesia, and it helps the citizens to become virtuous. But what is meant by ‘monarchy’ and ‘democracy’, and how are they mixed? I argue that the fundamental relations in Plato's discussion of constitutions are those of authority and equality. These principles are centrally about the extent to which citizens submit to the judgment (...) of an authority and the extent to which they decide for themselves respectively—the extent to which they are ruled by themselves or ruled by another. The institutions of Magnesia reflect these principles in practice and provide a more nuanced way to understand Plato’s assessment of democratic institutions. (shrink)

In this paper, I discuss two concerns for pluralist truth theories: a concern about a key detail of these theories and a concern about their viability. The detail-related concern is that pluralists have relied heavily upon the notion of a domain, but it is not transparent what they take domains to be. Since the notion of a domain has been present in philosophy for some time, it is important for many theorists, not only truth pluralists, to be clear on what (...) domains are and what work they can do. The viability-related concern is that it’s not clear how a pluralist truth theory could explain the truth-conditions of mixed atomic propositions. To address this concern, truth pluralists should recognize something to which they have not been sufficiently attentive: that some atomic propositions belong to more than one domain. But, recognizing this requires rethinking the relationships between the nature of propositions, their membership in domains, and their truth. I address these issues and propose an understanding of them that is preferable to the best existing account of them, that offered by Michael Lynch. (shrink)

Morality has always been a pressing issue in video game scholarship, but became more contentious after “realistic” violence in games became possible. However, few studies concern themselves with how players experience moral dilemmas in games, choosing instead to focus on the way games affect postplay behavior. In my thesis I discuss the moral choices players encounter in the Metal Gear series of games; then, I analyze and compare the responses of players with and without martial career experiences. My argument (...) is that the moral choices players encounter during gameplay affect them differently, particularly if they have life experiences related to medical trauma, law enforcement, fire fighting, or military career fields, and that the behavior of those players will be observably different from players without the same experiences. In chapter one I present my personal history with Metal Gear, before moving on to the literature review in chapter two, which focuses on scholarship about the Metal Gear series of games and video game research as a whole, particularly studies concerned with how violent content affects players. In chapters three and four, I analyze Metal Gear Solid 3 (2004) and Metal Gear Solid V (2014/2015) in order to gain insight into the moral dilemmas posed by each game. In chapter five I report the results of a survey about player responses towards the game dilemmas given by martial and non-martial groups to identify observable patterns of behavior in how they act and react towards each scenario. -/- This is a preprint version of the official paper until an update is produced. The current official version is available at the West Chester Digital Commons in the external link section below. (shrink)

Some films scare us; some make us cry; some thrill us. Some of the most interesting films, however, leave us suspended between feelings – both joyous and sad, or angry and serene. This paper attempts to explain how this can happen and why it is important. I look closely at one film that creates and exploits these conflicted responses. I argue that cases of conflict in film illuminate a pair of vexing questions about emotion in film: (1) To what extent (...) are emotional responses rational, or in need of rationalization?; and (2) What relationship is there between emotional response and value (moral, filmic, or otherwise)? Conflict, I argue, can be revealing, and can help us better understand emotional responses to narrative film1 in general. The paper is divided into four sections. First, I sketch a theory of emotional engagement that makes sense of the notion of a “conflicted emotional response” to a film. Second, I turn to a particular case of a film that produces this sort of conflict, Fritz Lang’s M (1931), and show that the conflict engendered by that film is both more significant and less unusual than it may appear. In the final two sections, I argue that there is no need to rationalize or make consistent such mixed emotional responses, and that there is real moral, aesthetic, and cognitive value to be had from such conflict. (shrink)