Prediction of carbon dioxide solubility in aqueous mixture of methyldiethanolamine and <i>N</i>-methylpyrrolidone using intelligent models

Tatar, Afshin,Barati, Ali,Yarahmadi, Ali,Najafi, Adel,Lee, Moonyong,Bahadori, Alireza Elsevier 2016 International journal of greenhouse gas control Vol.47 No.-

<P><B>Abstract</B></P> <P>Clear knowledge about the solubility of acid gases such as CO<SUB>2</SUB> in different solvents at different states is very important, especially for carbon capture from flue gases. This study highlights the application of artificial intelligence in prediction of carbon dioxide solubility in a mix solvent of methyldiethanolamine and <I>N</I>-methylpyrrolidone at wide range of temperature and pressure.</P> <P>The input data of the models were temperature, pressure, and saturation pressure and the output parameter was the solubility of CO<SUB>2</SUB>. Different intelligent approaches such as MLP-ANN, GA-RBF, CSA-LSSVM, Hybrid-ANFIS, PSO-ANFIS, and CMIS were developed and the reliability of models was investigated through different graphical and statistical methods. Result showed that the developed models are accurate and predictive for estimation of experimental solubility data. However, the CMIS approach exhibited better results compared to other intelligent approaches. Results of this study showed that intelligent based algorithms are powerful alternatives for time-consuming and difficult experimental processes of solubility measurement.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Different models are utilized to predict carbon dioxide solubility in mix solvent of methyldiethanolamine and <I>N</I>-methylpyrrolidone. </LI> <LI> The CMIS approach exhibited better results compared to other intelligent approaches. </LI> <LI> The reliability of models was investigated through different graphical and statistical methods. </LI> <LI> The models show excellent agreement with experimental data. </LI> </UL> </P>

Whale Conservation in Coastal Ecuador: Environmentalism of the Poor or Neoliberal Conservation?

Tatar Bradley 서울대학교 라틴아메리카연구소 2014 이베로아메리카硏究 Vol.25 No.2

In this paper, I examine the interaction between transnational activistnetworks, conservation scientists, government authorities, and artisanalfishing communities in coastal Ecuador. Focusing on the problem of cetaceanbycatch, I employ the concept of the “discourse of nature” to identifycontrasting languages of valuation used by the stakeholders for marine coastalenvironments. NGOs utilize a scientific evaluation to portray artisanal fishingas a hazard to the survival of humpback whales, but this coincides with theattempt by government and development agencies to portray artisanalfisheries as inefficient and ecologically harmful. In contrast, a survey I carriedout in a coastal fishing community shows that local residents contest thisportrayal of fishing as ecologically harmful, drawing upon their discourses oflivelihood, indigenous identity, territorial claims, and social marginality. Focusing on the social conflict surrounding the marine protected area [MPA]of Machalilla National Park, I argue that additional restrictions on fishing tomitigate the incidence of cetacean bycatch will not have adequate socialacceptance by local artisan fishing communities. Hence, the language ofwhale conservation which appears to be a pro-poor environmentalism at themacro (international) level, appears to local actors as a threat to theirlivelihoods. To offset this micro/macro discrepancy, whale conservation NGOsshould support local aspirations to continue fishing as a livelihood, thereby restoring whale conservation to the status of “environmentalism of the poor”.

Anthropomorphism as Social Action: The Politics of Animals on Display

Tatar Bradley 한국문화인류학회 2021 韓國文化人類學 Vol.54 No.3

The article presents a case study from the city of Ulsan, where dolphins have been displayed in an aquarium as “immigrants” who became naturalized as Koreans. This use of anthropomorphism seems to have no useful function when analyzed as a representation, because it does not compel belief, nor does it endow actors with the capacity for meaningful action. To explain the existence of the “dolphin-as-immigrant” discourse, two different theoretical perspectives are compared, one which derives from mainstream anthropology and another from ontological anthropology. The two perspectives provide contrasting strategies for describing capacities for agency and social action, by problematizing the relationship between knowledge and action with differing sets of assumptions. In mainstream anthropology, the “dolphin-as-immigrant” is merely a representation, but ontological anthropology opposes the portrayal of culture as representation. Ontological anthropology provides an alternative account of agency, by moving beyond human knowledge and cultural representation, focusing instead on the ways that nonhumans and humans are related in political configurations. The goal of the comparison of mainstream anthropology and ontological anthropology is not to show which perspective is more useful, but to highlight the ways in which anthropomorphism can create meaningful political relationships between humans and nonhuman animals. In conclusion, it is argued that ontological anthropology is compatible with the goals and aims of anthropology, in that both specify the relationships between the knowledge of human actors and the possibilities of social action.

Place-making, Landscape and Materialities: Whales and Social Practices in Ulsan, Korea

Tatar Bradley 한국문화인류학회 2017 韓國文化人類學 Vol.50 No.2

In the southeastern coastal city of Ulsan in Korea, people continue to defy the global taboo on eating whale meat, which they believe is an important social practice for local identity. The Nam–gu District in the City of Ulsan has created the Special Zone for Whale Culture as a spatial territory in which many divergent social practices related to whales are carried out. In this tourist zone, how are the elements of Ulsan whale culture invented, and how are they attached to a specific place? Using the concept of landscape, I argue that place–making practices are carried out to produce different kinds of whales as material realities. I analyze three of the many kinds of whales that are produced: the natural history whale, the whale as meat, and the whale as object of conservation. I conclude by arguing that these materialized whales are not separate, but relational entities which contribute to local identity through their enactment in the landscape.

Beneficiation of alunitic kaolin within the floor and wall tile angobe compositions

İlknur Tatar,Nezahat Ediz,Ahmet Aydın 한양대학교 세라믹연구소 2015 Journal of Ceramic Processing Research Vol.16 No.1

Most of the kaolin in Bal kesir-S nd rg (Turkey) region cannot be used in ceramic industry because of its high alunite content. The alunite within the composition of kaolin has to be removed in order them to be used in ceramic industry. Therefore, this research aimed at removing alunite from the kaolins of Balikesir-Sindirgi region and investigating its possible use in ceramic industry. For this purpose, mechanical scrubbing-screening, flotation and calcination methods were applied to the kaolins of the region to remove alunite. The material obtained was then used in the floor and wall tile angobe recipes of a ceramic tile factory. The angobes, prepared using the factory’s standard angobe recipes, were applied to the floor and wall tile bodies of the factory and later they were glazed. After the tests, it was understood that F2 angobe prepared by M2 kaolin, beneficiated through the flotation process and F3 angobe prepared by C3 kaolin, beneficiated through calcination could be alternatives for the commercial angobe currently used by the factory in floor tile production. Similarly, it was proven that W2 and W3 angobes prepared by using M2 and C3 kaolins, respectively, could be seen as alternatives for the angobe currently used by the factory in wall tile production.

Latino Ethnicity and Other Influences on the Immigrants` Rights Movement in the United States

Bradley Tatar 서울대학교 미국학연구소 2008 미국학 Vol.31 No.1

Investigation of the effect of pressure on thermodynamic properties and thermoelastic phase transformation of CuAlNi alloys: A molecular dynamics study

Cengiz Tatar,Sefa Kazanc 한국물리학회 2012 Current Applied Physics Vol.12 No.1

Thermoelastic phase transformations and thermodynamic properties of CuAlNi alloys at 0, 1, 2 and 3 GPa pressures were investigated by using MD simulation in this study. The interactions between atoms were modelled by SuttoneChen type of embedded atom method (SCEAM) that is based on many-body interaction. It was observed that thermoelastic phase transformation in the ternary alloy system occurred at the end of thermal process. Radial distribution function (RDF) was used in order to analysis the structures obtained from MD simulation using the simulation techniques’ thermodynamic parameters. The transformation temperatures, enthalpy and entropy of the ternary alloy system have been observed to be changing with the applied pressure. In addition, it was found that the elastic energy has been decreased about 22% by applied pressure whereas Gibbs free energy has been increased about 60% by applied pressure. The values of the thermodynamical parameters obtained in this study were observed to be in close agreement with the experimental study. Thermoelastic phase transformations and thermodynamic properties of CuAlNi alloys at 0, 1, 2 and 3 GPa pressures were investigated by using MD simulation in this study. The interactions between atoms were modelled by SuttoneChen type of embedded atom method (SCEAM) that is based on many-body interaction. It was observed that thermoelastic phase transformation in the ternary alloy system occurred at the end of thermal process. Radial distribution function (RDF) was used in order to analysis the structures obtained from MD simulation using the simulation techniques’ thermodynamic parameters. The transformation temperatures, enthalpy and entropy of the ternary alloy system have been observed to be changing with the applied pressure. In addition, it was found that the elastic energy has been decreased about 22% by applied pressure whereas Gibbs free energy has been increased about 60% by applied pressure. The values of the thermodynamical parameters obtained in this study were observed to be in close agreement with the experimental study.

Place-making, Landscape and Materialities: Whales and Social Practices in Ulsan, Korea

( Bradley Tatar ) 한국문화인류학회 2017 韓國文化人類學 Vol.50 No.2

한국의 울산에서는 고래 식용에 대한 전지구적 터부를 거부하고 이를 지역의 정체성에 있어서 중요한 사회적 실천으로 간주한다. 구체적으로 울산시 남구에서는 고래문화특구를 공간적 영역으로 구성하여 고래에 관련된 사회적 실천을 수행한다. 본 논문에서는 경관 개념을 활용하여, 울산에서 장소 만들기를 통해 고래를 물적 실체로 구성하는 양상을 고찰하였다. 연구 결과 고래가 다음과 같은 세 가지의 물적 실체로 구분됨을 파악하였다: 과학적 연 구 대상으로서의 고래, 음식으로서의 고래, 그리고 보존의 대상으로서의 고래. 본고에서는 이와 같이 물화된 고래의 다양한 의미가 상호 연관되어 있으며, 이들이 모두 울산의 특정 경관 속에서 지역 정체성으로서 구현됨을 주장한다. In the southeastern coastal city of Ulsan in Korea, people continue to defy the global taboo on eating whale meat, which they believe is an important social practice for local identity. The Nam-gu District in the City of Ulsan has created the Special Zone for Whale Culture as a spatial territory in which many divergent social practices related to whales are carried out. In this tourist zone, how are the elements of Ulsan whale culture invented, and how are they attached to a specific place? Using the concept of landscape, I argue that place-making practices are carried out to produce different kinds of whales as material realities. I analyze three of the many kinds of whales that are produced: the natural history whale, the whale as meat, and the whale as object of conservation. I conclude by arguing that these materialized whales are not separate, but relational entities which contribute to local identity through their enactment in the landscape. * This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MSIP) (No. NRF- 2015R1A5A7037825).

Hombres Bravos, Mujeres Bravas : Gender and Violence in the Mexican Corrido

Bradley Tatar(브래들리 타타르) 한국라틴아메리카학회 2010 라틴아메리카연구 Vol.23 No.4

This article examines the construction of meaning in episodes of violence which have come to dominate Mexican popular music, focusing on the story-telling song called the corrido. Although scholars have considered the multiple meanings of violence in the narrative songs, they have not given adequate attention to the character of the mujer brava, or “tough woman”. I begin by considering gender roles and codes of honor which historically developed in northern Mexico, in the region of the U.S./Mexico border. Next, the expression of machismo and marianismo as cultural patterns in popular corridos is illustrated and explained. Finally, the mujer brava is contrasted with the traditional conception of the submissive woman, as this character is aggressive and defends her honor against threats from men. The argument is developed that the mujer brava is not simply a woman who acts like a man, but who defends her honor with distinctly female forms of destructive power. Finally, I apply these insights to the appearance of the “mujer brava” in several narcocorridos. In these selected narcocorridos, the destructive power of a woman is used as a representation of the serrano or ranchero culture, in which gendered norms of honor and respect are considered to be more important than laws and political institutions. I argue that an understanding of gender norms helps to reveal the meanings of Mexico’s narco-insurgency, especially shedding light on why drug smuggling and drug-related culture are not deemed unethical by the audiences who enjoy narcocorridos.

The effects of high amounts of Al and Zn on the structural properties of hydroxyapatite prepared by sol-gel method

Cengiz Tatar,Dilek Bagci,Omer Kaygili 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.5

In the present study, the effects of high amounts of Al and Zn additives on the crystal structure, phase composition andmicrostructure of hydroxyapatite (HAp) samples synthesized by sol-gel route were investigated by X-ray diffraction (XRD),Fourier transformation infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) techniques. The values of thecrystallinity percent, crystallite size, lattice parameter of a and volume of the unit cell decrease gradually with increasingamount of the co-additives. The formation of the new phases is observed and these phases become dominant with increasingamount of Al and Zn. The morphology of HAp, shape and size of the particles are also affected by the amount of Al and Zn. As expected, a gradual decrease in the Ca/P molar ratio is observed.