bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Analysis and Modeling of Nitrate Removal through Zero-Valent Magnesium Particles
Authors: Siciliano Alessio , Curcio Giulia Maria , Limonti Carlo
Published: June 2019

The pollution of water by nitrates represents an important environmental and health issue. The development of sustainable technologies that are able to efficiently remove this contaminant is a key challenge in the field of wastewater treatment. Chemical denitrification by means of zero-valent metallic elements is an interesting method to reduce the oxidized forms of nitrogen. Compared to other metallic reactants, zero-valent magnesium (ZVM) has many profitable aspects, but its use for nitrate removal has scarcely been investigated. In the present work, several batch tests were conducted to examine the concurrent effects of pH, initial nitrate concentration and Mg0 quantity on process performance. The experimental results proved that at pH 3, for a given initial nitrate concentration, the dose of ZVM largely influences process efficiency. In particular, with a ratio between Mg0 and initial N-NO3− amount (Mg/NNi) of 0.33 g/mg, it is possible to obtain complete denitrification within 30 min. Beyond this ratio, no further improvement of treatment was observed. The experiments allowed us to identify the nitrogen forms produced during the treatment. Nitrogen gas was generally the main reaction product, but the trends of the different compounds (NO3−, NO2−, NH4+ and N2) notably changed in response to the modification of operating parameters. Moreover, the results demonstrated that, in a highly acidic environment, when treating solutions with a low nitrate concentration, process performances are unsatisfactory even when using a high Mg/NNi ratio. By increasing the process pH to 5 and 7, a significant denitrification decline occurred. Furthermore, at these pH levels, the enhancement of nitrate concentration caused a progressive process deterioration. Through detailed analysis of experimental results, reactions kinetics and new mathematical equations, able to describe the trends of different nitrogen forms, have been defined. Moreover, reactions pathways have been proposed. Finally, the characterization of exhausted material allowed us to identify the corrosion products formed during the treatment.
Geochemical Behavior of Uranium and Radon in Groundwater of Jurassic Granite Area, Icheon, Middle Korea
Authors: Cho Byong Wook , Choo Chang Oh
Published: June 2019

Uranium concentrations (a total of 82 samples) in groundwater in Icheon, middle Korea, showed a wide range from 0.02 to 1640 μg/L with a mean of 56.77 μg/L, a median of 3.03 μg/L, and a standard deviation of 228.63 μg/L. Most groundwater samples had quite low concentrations: 32.9% were below 1 μg/L, while 15.9% exceeded 30 μg/L, the maximum contaminant level (MCL) of the US EPA (Environmental Protection Agency). Radon concentrations also ranged widely from 1.48 to 865.8 Bq/L. Although the standard deviation of radon was large (151.8 Bq/L), the mean was 211.29 Bq/L and the median was 176.86 Bq/L. Overall, 64.6% of the samples exceeded the alternative maximum contaminant level (AMCL) of the US EPA (148 Bq/L). According to statistical analyses, there was no close correlations between uranium and radon, but there were correlations between uranium and redox potential (Eh) (−0.54), dissolved oxygen (DO) (−0.50), HCO3− (0.45), Sr (0.65), and SiO2 (−0.44). Radon showed independent behavior with respect to most components in groundwater. Uranium concentrations in groundwater increased with increasing water–rock interactions. Anomalously high uranium and radon concentrations in groundwater are preferentially localized in granite areas and spatial distributions are remarkably heterogeneous.
Investigation of Relevance Between Landslide and Stand Areas on Open Source Web Map (Openlayers): Case Study in Trabzon Region
Authors: GÜMÜŞ Selçuk , HATAY Taha Yasin , ÜNVER OKAN Saliha
Published: June 2019

In recent years, the developments in computer
technology are as effective in forestry as in many sectors. Open source web map
based Geographic Information Systems (GIS) offer a significant advantage in
investigating forest structure. When using in open source web maps, the
relationships between the data of different features can be evaluated
effectively and accurately. In this study, the relationship between online
landslide data and online stand data was investigated by coding a web interface
with OpenLayers which is one of the common open source web maps. OpenLayers
based landslide areas and ArcGIS Web Services based stand areas have been
evaluated in the solution process. The parameters of the landslide stands have
been evaluated in a case study conducted in Trabzon Regional Directorate of
Forestry. Landslide data were obtained from the General Directorate of Mineral
Research and Exploration, while stands data were obtained from General
Directorate of Forestry. The results indicated that most of the active
landslide areas consisted of pure stands (26.71%), mixed stands (20.50%), and
agricultural areas (38.51%). It was found that 14.29% of active landslide areas
consisted of degraded forest and open areas while 38.51% consisted of
agricultural lands. The results also indicated that stands with sparse crown
closure covered 32.30% of the active landslide areas, while moderate and dense
crown closures covered 12.42% and 2.48%, respectively. It was revealed that percentages of
landslide areas were high in stands with low crown closure due to effects of
heavy rain on the soil. It was also found that mostly tree species with narrow
canopy and shallow root formation are subject to landslide incidents. This
study suggested that OSWMs can be effectively used to investigate landslide
activities in forest areas. It is anticipated that sharing open source data
through online databases will provide great opportunity for practitioners and
researchers in the field of forestry.
EFFECT OF GYPSUM ADDITIVE ON QUALITY OF COMPOSITIONAL BINDING MATERIALS CELLULAR STRUCTURE
Authors: Ожерельева А. , Ozherel'eva Anastasiya , Кудеярова Н. , Kudeyarova Nina
Published: June 2019

The effect of gypsum additives on the process of lime slaking and the quality of the composite binder is discussed. It is established that a different water-solid ratio, the water temperature and the use of an additive of natural gypsum can regulate the rate of the lime slaking process. The effect of this additive on the kinetics of the process, the temperature factor, the dispersion of the product and the quality of the products obtained by slaking are considered. During the hydration of highly active lime, the slaking temperature reaches high values, at which the process of gypsum dehydration begins. The combination of the exothermic process of lime slaking and the formation of a medium of saturated water vapor with the addition of natural gypsum to lime forms the semi-aquatic gypsum СаSО4∙0,5Н2О. It does not dehydrate, does not become insoluble and retains its chemical properties. There is no exothermic effect of crystallization of anhydrite. Strength results of composite binder cellular structure demonstrate that lime-based binder samples with the addition of natural gypsum under autoclave conditions are more solid than binder-free samples.
TIP FAKÜLTESİ ÖĞRENCİLERİNİN MELANOSİTİK NEVUSLER, DERMOSKOPİ VE GÜNEŞTEN KORUNMA İLE İLGİLİ BİLGİ, TUTUM VE GÖRÜŞLERİNİN DEĞERLENDİRİLMESİ
Authors: KAYA İSLAMOĞLU Zeynep Gizem , DEMİRBAŞ Abdullah
Published: June 2019

Amaç: Bu
çalışmayla klinik branşlara geçiş yapmış tıp fakültesi öğrencilerinin
melanositik nevuslar, dermoskopi ve güneşten korunma ile ilgili bilgi ve
görüşlerinin değerlendirilmesi, bu bilincin tıp eğitimi sırasında kazanılıp
kazanılmadığının belirlenmesi amaçlanmıştır.

Gereç
ve Yöntemler: Çalışmamız Haziran-2018 tarihinde tıp
fakültesi Dönem-3, 4, 5 ve 6 öğrencilerine tarafımızca hazırlanan demografik
verileri, nevuslar, dermoskopi, güneş ve güneşten korunma ile ilgili bilgileri
ölçmeye yönelik 30 sorudan oluşan anket çalışması olarak planlandı. Veriler
SPSS 22.0 programı kullanılarak, istatistiksel anlamlılık düzeyi p<0,05
olacak şekilde değerlendirildi.

Bulgular:
Çalışmamıza 187 öğrenci katıldı. %46,5’i erkek, %53,5’i kadın idi. Yaş
ortalaması 23,075±1,795 olarak bulundu. Öğrencilerin büyük çoğunluğu
melanositik nevus denilince ilk akla edinsel melanositik nevus geldiğini,
atipik nevusların malign melanom riski taşıdığını, her benin kansere
dönüşmeyeceğini ve benlerin alınmasının tehlikeli olmadığını bildirdiler. Büyük
çoğunluğu dermoskopi kelimesini duymuştu, ancak ne işe yaradığını bilmiyordu.
Yine büyük çoğunluğu ben ve dermoskopi muayenesi kendine ve yakınlarına hiç
yaptırmamıştı. Büyük oranda güneşten korunuyorlardı, ancak güneşten koruyucu
krem kullanım oranı ve kullanma sıklığı düşüktü. Güneşten koruyucu kremler
hakkındaki bilgi düzeyleri de düşük –orta düzeydeydi. Genel olarak dönem
arttıkça, özellikle dermatoloji stajının alındığı Dönem-5 öğrencilerinde
soruların doğru cevaplanma oranı daha yüksekti.

Sonuç:
Öğrencilerimizin nevuslar, deri kanserleri ve kanser gelişimi için
risk faktörleri, güneşten korunma konusundaki bilgilerinin orta-iyi düzeyde, dermoskopi
ile ilgili bilgilerinin zayıf olduğu görüldü. Tıp eğitimi sırasında bu
konuların sadece dermatoloji stajında değil de, diğer dönemlerde de ara ara
işlenmesi bu konudaki eksikliği azaltmakta ve öğrencilerimizin daha iyi
bilinçlenmesinde faydalı olabilir görüşündeyiz.
Changes of the fatty acid composition of sprouts during germination
Authors: Melinda-Rita Márton  , Sándor Szép  , Zsolt Mándoki  , Melinda Tamás  , Salamon Rozália Veronika  , Szidónia Salamon  , Csaba András  , János Csapó
Published: June 2019

During our research we studied the fat content and fatty acid composition during the germination and sprouting periods of the most important sprouts: wheat, lentil, alfalfa, radish and sunflower seed. In this article we present our research results during this sprouting study. The concentration of the saturated fatty acids (palmitic acid, stearic acid) decreased, the concentration of the unsaturated fatty acids increased during germination, but the tendency was not so high than was published in the literature.
Effect of soil-compost proportion on the abiotic and biotic parameters of soilplant system
Authors: Anita Szabó  , Imre Vágó
Published: June 2019

The environmental awareness, coming to the front in the 21st century, motivates us to supply the plant nutrient demand (in point of the plant, the environment and the human health) with natural materials.Composting is known since the beginning of civilization. We came to know more the processes of composting as a result of last decades’ research, but numerous unexplained questions remained up to this day. The good compost is dark gray or brown, and it should not create an odor. It has aggregate structure, and it’s pH is neutral. Compost is soil-like (Fehér, 2001), nutrient-rich material, which contains valuable nutrients extracted from soil, so if we recycle this, we can decrease the chemical fertilizer and other (example: mineral energy) expenses.The reason of that we chose the more accurate cognition of compost utilization is to do more effective the site-specific nutrient supply. This increases the average yield and the quality of yield. Besides we can decrease the harmful effects, which endanger the plant, the environment, and the human body.During the compost utilization experiment we blended the  acid sandy soil with compost in 4 different volumetric proportions (5 treatments) than we set the pots randomized. The advantage of this method is that we can provide equal conditions for plants so we can measure the effect of  treatments correctly. Our experimental plant was ryegrass (Lolium perenne L.), that grows rapidly, tolerates the glasshouse conditions, and indicates the effect of treatments well. After the harvest of ryegrass we measured the fresh and dry weight of harvested leaves and the total C-, N-, S-content of the dry matter and of the soil, we examined the pH and the salt concentration of  soil as well. Our aim was to study and evaluate the relations between the compost-soil proportion and the nutrient content of soil and plant. In our previous experiments we confirmed (based on variance analyses) that the compost has a beneficial effect on soil and increases the nutrient content of the soil (Szabó, 2009). But it’s important to appoint that the compound of compost is seasonally change: in winter the selective gathered municipal solid waste contains salt that were applied for non-skidding of roads, but salt has a negative effect to the plant. We proved that in our experiment the 25/75% compost/soil proportion was ideal for the plant. This content of compost effected 6 times higher green matter weight compared to the 100% sandy soil.
Correlations study between the selenium content of wheat grass (Triticum aestivum L.) and wheat seeds grown on different soil types
Authors: Melinda Tamás  , Zsolt Mándoki  , Melinda Márton  , Sándor Mészáros  , Szabolcs Lányi  , János Csapó
Published: June 2019

In the course of the research we determined selenium and dry-matter content of 35 wheat grasses and 35 wheat seeds. The selenium content of the preparation plant samples was measured by spectrofluorimetric determination (ʎexcitation=380 nm, ʎemission=519 nm) of the resulted piaz-selenol complex. It was established that between the selenium content of the wheat grass and wheat seed the correlation coefficient was 0.36 at p=0.05 level which indicates a medium close correlation. Similarly, there was a medium close correlation between selenium content of the wheat grass calculated on dry-matter basis and total selenium content of the wheat, with a correlation coefficient of 0.40 at p=0.02 level.
Perceptions of Turkish EFL Student Teachers Towards Learning Phrasal-prepositional Verbs Through Corpus-based Materials
Authors: GİRGİN Ufuk
Published: June 2019

The current study aims to explore the perceptions of 55 Turkish EFL student teachers towards using corpus-based materials in English phrasal-prepositional verb learning. It also explores gender-based differences and similarities towards using such materials in the learning of English phrasal-prepositional verbs. To do so, the study adopted a mixed method approach. The quantitative data were collected through a questionnaire, and the qualitative data were collected through focus-group interviews. The results of the questionnaire revealed that the learners had somewhat positive perceptions of using corpus-based materials in their phrasal-prepositional verb learning. The results of the interviews also showed that the learners enjoyed using corpus-based materials in their phrasal-prepositional verb learning, thereby supporting the questionnaire data. Gender differences that emerged from the study showed that the female learners had higher positive perceptions of using corpus-based materials than the male learners. This study provides further evidence that Turkish EFL learners feel that using corpora in language learning is an effective approach, and language teachers questioning whether to use corpora in language teaching can make use of such sources to help their students learn different aspects of vocabulary in English.
EFFECTS OF CORPORATE GOVERNANCE, BUSINESS ENVIRONMENT AND FIRM CHARACTERISTIC ON THE ADOPTION OF MANAGERIAL ACCOUNTING
Authors: Huynh Linh Quang , Duong Anh Thi Thuy , Nguyen Thuy Thi Thanh , Nguyen Phuc Thi , Nguyen An Thi My , Co Lien Hong
Published: June 2019

On the one hand, the adoption of managerial accounting in business is determined by corporate governance; on the other hand, it is also dependent on business environment and firm characteristic. Nonetheless, so far the causal relationships from corporate governance, business environment and firm characteristic to the adoption of managerial accounting in business  have not been empirically explored in Vietnam. This research is conducted to investigate the simultaneous effects of corporate governance, business environment and firm characteristic on the adoption of managerial accounting in business. This study employs  reliability analysis, exploratory factor analysis and regression analysis to deal with the data. The findings indicate that, corporate governance, business environment and firm characteristic concurrently affect the adoption of managerial accounting in business.
DETERMINANTS TO STUDENT’S ENTREPRENEURIAL INTENTIONS OF FACULTY OF BUSINESS ADMINISTRATION AT UNIVERSITY OF ECONOMICS AND LAW
Authors: Nguyen Quang Hai , Cao Cuong Nguyen Trung
Published: June 2019

The objective of this paper is to determine factors affecting on entrepreneurial intentions of business administration students of Faculty of Business  Administration at University of Economics and Law. The research data were collected from 361 students through convenience-sampling method. By conducting an exploratory study, we found that there are six factors influencing students’ entrepreneurial intentions including: (1) Perceived Behavioral Control, (2) Organizational  employment motivation, (3) Environment for Entrepreneurship, (4) Self  employment motivation, (5) Subjective norm and (6) Academic Support. In which, Perceived Behavioral Control has the most powerful effect on entrepreneurial intentions of business administration students.
THE ORIGINAL KHMER WORDS
Authors: Nguyen Hue Thi
Published: June 2019

The Khmer language vocabulary is not only inherent in the Khmer language but is also characterized by the fact that it is composed of elements from other languages and gradually becomes an indispensable part of the language system in Khmer language. If the concept of Khmer is just the word available in the Khmer language at the newly formed stage, it will be difficult to see the change and development of the Khmer itself and not reflect the true nature of the Khmer language. In terms of origin, the SanscritPali words have been high-level Khmerized, so Khmer language users do not consider them as extrinsic words but native words - pure Khmer words.
USING OPTIMAL METHOD FOR CUTTING ROD MATERIALS
Authors: Tran Hai Ngoc
Published: June 2019

The article presents an optimal method to cut rod materials. By this method, the relative functions between the number of products cut from the given materials and conditions are first established. Then, the powerful computing capabilities of Mathematica software are applied to solve the problems. This method has a wide range of application and is convenient in use.
RELATIONSHIP BETWEEN FOOD SAFETY KNOWLEDGE AND HYGIENE PRACTICES OF STREET FOOD VENDORS IN TRA VINH CITY
Authors: Vo Hoang Minh , Nguyen Tham Thi Hong , Le Tam Minh
Published: June 2019

The objective of this study is to explore the relationship between the current food safety knowledge of street food vendors and their hygiene practices in Tra Vinh city. Fifty street food vendors were randomly selected and the survey was conducted using a face-to-face interview method through the questionnaire. The results showed evidence of a slight relationship between the food safety knowledge of the street food vendors and their hygiene practices (r = 0.27, p > 0.05).  Based on the demographic information, the education might be the most important factor for a better understanding of the variability of the food safety  knowledge (F = 3.54, p < 0.05), but not that of the hygiene practices (F = 0.78, p > 0.05). Until recently, the training of food safety knowledge has been conducted with the expectation that street food vendors would prepare and store food safely in case they would have adequate food safety and hygiene knowledge.  However, our study shows that the current training way has not been effective due to the fact that the behavior of street food vendors who were trained was not different from the behavior of street food vendors who were not trained
IMPROVING DETECTION PERFORMANCE OF DUPLICATE BUG REPORTS USING EXTENDED CLASS CENTROID INFORMATION
Authors: Nhan Phuc Minh
Published: June 2019

In software maintenance, bug reports play an important role in the correctness of  software packages. Unfortunately, the duplicatebug report problem arises because there are too many duplicate bug reports in various software projects. Handling with duplicate bug reports is thus time-consuming and has high cost of software maintenance. Therefore, this research introduces a detection scheme based on the extended class centroid information (ECCI) to enhance thedetection performance. This method is extended from the previous one, which used only centroid method without considering the effects of both inner and inter class. Besides, this method also improved the previous use of normalized cosine in identifying the similarity between two bug reports by denormalized cosine.  The effectiveness of ECCI is proved through the empirical study with three open-source projects: SVN, Argo UML and Apache. The experimental results show thatECCI outperforms other detection schemes by about 10% in all cases.
CONSUMERS’ ATTITUDES TOWARD PROMOTION IN SHAPING VINAMILK BRAND EQUITY IN CAN THO CITY
Authors: Phan Kiet Tuan , Phan Tu Anh
Published: June 2019

The study aims at evaluating consumers’ attitudes toward promotion in shaping Vinamilk brand equity in Can Tho City. The research was conducted through a survey of 296  customers at four districts in Can Tho City. In this study, the descriptive analysis method, Cronbach’s Alpha, Exploratory Factor Analysis and  Confirmatory Factor Analysis were used. Hypotheses and models were tested by Structural Equation Modeling (SEM) and Bootstrap method with the repeated samples of 1000. The research results showed that attitudes toward advertising and sales promotions have the impacts on the dimensions of brand equity. In which, the attitude toward sales promotions has the strongest impact on perceived quality, while the attitude toward advertising has the strong impact on brand awareness. In addition, the research also showed that the dimensions of brand equity have impact on the overall brand equity. Based on the studying results, implications for managers were proposed in order to enhance the effectiveness of promotion activities on Vinamilk brand equity.
KNOWLEDGE OF THE YOUTH ABOUT THE ASEAN ECONOMIC COMMUNITY (AEC) AND THEIR AWARENESSS OF APEC-RELATED OPPORTUNITIES AND THEREATS
Authors: Nguyen Chi Thi Phuong , Tran Thuy Thi Phuong
Published: June 2019

ASEAN Economic Community (AEC) was established in 2015 and many agreements and commitments must be completed by Vietnam in the future. In the context of deeper integration, Vietnamese enterprises are facing competitive pressures in the domestic market. Thus, to take advantage of opportunities and respond to challenges, Vietnamese enterprises need to focus on building a workforce that is keenly aware of the challenges and opportunities of the AEC. This will help consolidate and improve their competitiveness. However, Vietnamese companies and their employees have not been unready for the AEC yet. The lack of  information about the AEC and the instructions become a major obstacle to the economy. The purpose of this research is to measure level of knowledge of the youth about the AEC and estimates its impact on their awarenesss of opportunities and threats related to the AEC. Results from the survey of 214 young  employees show that Vietnamese youth are confident of their subjective knowledge of the AEC, but their objective knowledge of the AEC is quite low. The youth recognized many opportunities and challenges brought by the AEC. Some relevant implications for managers, educational institutions and policymakers are also suggested in this research.
CHANGE AND EMPOWERMENT IN THE CULT OF GUAN GONG IN SOUTHERN VIETNAM
Authors: Nguyen Tho Ngoc
Published: June 2019

Cultural practice is a kind of expression and reflection of real livelihood into human mind and experience, is a set of knowledge, values, faiths and social standards constructed by the whole community; therefore, it contains the rhythm and breath of life and can be changed to meet the demands. Regarding socialenvironment, the communities always keep going on the processes of developing and diversifying their culture through acculturation, exchange and localization, which finally constructs the social norms, goals and driving forces for their advancement. Among various approaches and methodologies, the change in  empowerment in cultural practices actively offers the optimized values in functional standardization and implementation. The final value is undoubtedly the social capital. This research is to investigate the introduction, development, change and empowerment of the Chinese-rooted Guan Gong belief in Vietnam, through which emphasizes the process and nature of the cult during the deep absorption in Vietnamese history of anti-foreign invasions throughout the last two centuries, and enriches local values of a characteristic belief and a symbolic icon of multicultural exchanges in Vietnam, especially in the Southern region. Thispaper applies the theories of deconstruction and empowerment under cultural studies perspective in order to analyze and explain the processes of  deconstruction, restructuring and empowerment in the cult of Guan Gong in Southern Vietnam as well as extract the regular principle of cultural exchanges locally.
STUDY OF TiO2 NANOPARTICLES’ STRUCTURE USING DENSITY FUNCTIONAL THEORY BASED TIGHT BINDING METHOD
Authors: Phan Hung Thanh
Published: June 2019

The different structure and size of TiO2 nanoparticles ranging from 0.8 nm to 2.7 nm with two different phases of anatase and rutile were studied by Density  Functional theory based Tight Binding (DFTB) method. The results showed that the stability of the rutile phase was better than that of the anatase phase. Based on calculation of the electronic properties of particles, the energy band gap of rutile particles was comparable to that of bulk structure. In contrast, the energy band gap of the anatase changed irregularly. Moreover, the formation energy that was used for forming the particles was inversely proportional to their size based on computation of energy. The results provided useful instructions for practical applications in fabrication of TiO2 nanoparticles.
CURRENT SITUATIONS AND INFLUENTIAL FACTORS OF BIOTECHNOLOGICAL DEVELOPMENT IN AQUACULTURE IN DONG THAP PROVINCE
Authors: Duong Viet Bao , Tran Dung Nhan , Le Phong Thanh
Published: June 2019

Research on "Current state Analysis and Influential Factors of Biotechnological Development in Aquaculture in Dong Thap Province" aims to evaluate the current situation and potential of biotechnological development in aquaculture production in order to make a scientific basis for the building of research programs and biotechnological applications in the aquaculture sector of Dong Thap province from 2016 to 2020 with a vision to 2030 by surveying 75 samples. Methodologies of descriptive statistical analysis, factor analysis, correlation analysis and regression analysis were used with SPSS software. Besides, SWOT analysis and consultancy of experts were made at three workshops. The results show that the areas of biotechnology that needed to promote applied research in the aquaculture sector were disease prevention, aquacultural technology and environmental treatment. In order to develop biotechnology, a breakthrough strategy needed to be  implemented in Dong Thap province as follows: (i) Increased investment in a number of key laboratories; (ii)  Development of "4 Houses" linkages in research,transfer and application of biotechnology; (iii) Human resources development in biotechnology. Proposed action plans: (i) Center construction, Institute of biotechnology in Cao Lanh city; (ii) Human resources training for biotechnology; (iii) Application of biotechnology in aquaculture to be implemented from 2016 to 2020 with a vision to 2030 to improve the efficiency of biotechnological application for rural and socio-economic development in Dong Thap province in the future.
The regression equations for random values of initial and final moisture content of foam-polymer-mineral insulation of main heat pipes
Authors: Viacheslav Sergeevich Belyi , Sergei Valerevich Bryl
Published: June 2019

This article presents the conclusion of regression equations for random values of the initial and final moisture content of the material of foam-polymer insulation of steel pipes of main heat pipelines according to the results of tests conducted in the factory. The example of approximation of experimental data about the source and target moisture content of the samples of foam insulation pipes shows that the regression equations with the help of the considered algorithm is practically possible.
The resonant brain: How attentive conscious seeing regulates action sequences that interact with attentive cognitive learning, recognition, and prediction
Authors: Grossberg Stephen
Published: June 2019

This article describes mechanistic links that exist in advanced brains between processes that regulate conscious attention, seeing, and knowing, and those that regulate looking and reaching. These mechanistic links arise from basic properties of brain design principles such as complementary computing, hierarchical resolution of uncertainty, and adaptive resonance. These principles require conscious states to mark perceptual and cognitive representations that are complete, context sensitive, and stable enough to control effective actions. Surface–shroud resonances support conscious seeing and action, whereas feature–category resonances support learning, recognition, and prediction of invariant object categories. Feedback interactions between cortical areas such as peristriate visual cortical areas V2, V3A, and V4, and the lateral intraparietal area (LIP) and inferior parietal sulcus (IPS) of the posterior parietal cortex (PPC) control sequences of saccadic eye movements that foveate salient features of attended objects and thereby drive invariant object category learning. Learned categories can, in turn, prime the objects and features that are attended and searched. These interactions coordinate processes of spatial and object attention, figure–ground separation, predictive remapping, invariant object category learning, and visual search. They create a foundation for learning to control motor-equivalent arm movement sequences, and for storing these sequences in cognitive working memories that can trigger the learning of cognitive plans with which to read out skilled movement sequences. Cognitive–emotional interactions that are regulated by reinforcement learning can then help to select the plans that control actions most likely to acquire valued goal objects in different situations. Many interdisciplinary psychological and neurobiological data about conscious and unconscious behaviors in normal individuals and clinical patients have been explained in terms of these concepts and mechanisms.
Anomeric sugar boronic acid analogues as potential agents for boron neutron capture therapy
Authors: Imperio Daniela , Del Grosso Erika , Fallarini Silvia , Lombardi Grazia , Panza Luigi
Published: June 2019

After the development of accelerators as neutron source, the access to new suitable agents for boron neutron capture therapy (BNCT) became a major need. Among many others, sugar boronic acids have recently attracted attention as boron carriers. Herein we report the synthesis and preliminary biological studies of two new sugar analogues containing a boronic acid at the anomeric position. The analogues were obtained by hydroboration of proper open-chain terminal alkenes that, after quenching with water, spontaneously afforded cyclic boronic acids with hemiacetal-like structures.
One-pot activation–alkynylation–cyclization synthesis of 1,5-diacyl-5-hydroxypyrazolines in a consecutive three-component fashion
Authors: Görgen Christina , Boden Katharina , Reiss Guido J , Frank Walter , Müller Thomas J J
Published: June 2019

A consecutive three-component activation–alkynylation–cyclization reaction of (hetero)aryl glyoxylic acids, oxalyl chloride, arylacetylenes, and hydrazides efficiently forms 1,5-diacyl-5-hydroxypyrazolines in moderate to good yields. The structures were unambiguously corroborated by comprehensive NMR spectroscopy and X-ray structure analyses of selected derivatives.
One-fluid Equations of General Relativistic Two-fluid Plasma with the Landau–Lifshitz Radiation Reaction Force in Curved Space
Authors: Liu Wenshuai , Bian Weihao , Zhao Bixuan , Yu Liming , Wang Chan
Published: June 2019

Incorporating the radiation reaction force into two-fluid plasma in curved space, we get a set of one-fluid general relativistic magnetohydrodynamics equations with the Landau–Lifshitz radiation reaction force. We analyze the importance of the radiation reaction acting on plasma around an astrophysical compact object.
Stronger Constraints on the Evolution of the MBH−
Relation up to z ∼ 0.6
Authors: Sexton Remington O. , Canalizo Gabriela , Hiner Kyle D. , Komossa Stefanie , Woo Jong-Hak , Treister Ezequiel , Hiner Dimassimo Sabrina Lyn
Published: June 2019

We revisit the possibility of redshift evolution in the M
BH−σ
* relation with a sample of 22 Seyfert 1 galaxies with black holes (BHs) in the mass range

and redshift range 0.03 < z < 0.57 with spectra obtained from spatially resolved Keck/Low-resolution Imaging Spectrometer observations. Stellar velocity dispersions were measured directly from the Mg ib region, taking into consideration the effect of Fe ii contamination, active galactic nucleus (AGN) dilution, and host-galaxy morphology on our measurements. BH masses are estimated using the Hβ line width, and the luminosity at 5100 Å is estimated from surface brightness decomposition of the AGN from the host galaxy using high-resolution imaging from the Hubble Space Telescope. Additionally, we investigate the use of the [O iii]λ5007 emission line width as a surrogate for stellar velocity dispersion, finding better correlation once corrected for Fe ii contamination and any possible blueshifted wing components. Our selection criteria allowed us to probe lower-luminosity AGNs and lower-mass BHs in the non-local universe than those measured in previous single-epoch studies. We find that any offset in the M
BH−σ
* relation up to z ∼ 0.6 is consistent with the scatter of local BH masses, and address the sources of biases and uncertainties that contribute to this scatter.
Variation of Resistin Gene Is Correlated with Insulin Resistance in Obese People of Indonesia
Authors: Hastuti Pramudji , Tasmini Tasmini , Utami Rizki Fajar , Riwa Meirlin Rambu Kaita , Steven Steven , Sadewa Ahmad Hamim
Published: June 2019

BACKGROUND: Obesity is considered associated with an increase of resistin levels that plays a role in the regulation of energy and maintaining fasting blood glucose. Polymorphism of resistin is thought to be correlated with the levels of resistin and insulin resistance.AIM: This study aimed to examine the association of +299G > A and -420C > G resistin (RETN) gene with resistin level and insulin resistance in obese people of Indonesia.METHODS: We examined 142 healthy unrelated subjects consisting of 71 obese and 71 controls. Fasting blood glucose was measured by the enzymatic method while the resistin and insulin levels were measured by Elisa method. Insulin resistance was calculated by HOMA-IR index. Polymorphisms of RETN genes were examined by the Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) method, and the data was tested. The data were correlated with Kruskal Wallis continue logistic regression and simple linear regressionRESULTS: In the obese group, there was an increased level of insulin (17.74 vs 11.27 mU/L) and insulin resistance (HOMA-IR 3.9 vs 1.46) compared to the control group. Polymorphism of +299G > A was associated with insulin resistance (GA and GA + AA genotype significantly different compare GG genotype with P < 0.001). Resistin level was negatively correlated with insulin level (P = 0.017). CONCLUSION: In this study, polymorphism of +299G > A was identified as a risk factor for insulin resistance, and there was a significant association of serum resistin level with insulin level in the population of Indonesia.
On the species of the genus Mistaria Lehtinen, 1967 studied by Roewer (1955) from Africa (Araneae, Agelenidae)
Authors: Kioko Grace M. , Jäger Peter , Kioko Esther N. , Ji Li-Qiang , Li Shuqiang
Published: June 2019

Eleven species of the spider family Agelenidae Koch, 1837 are reviewed based on the type material and transferred from the genus Agelena Walckenaer, 1805 to MistariaLehtinen 1967. These species occur in various African countries as indicated and include: M.jaundea (Roewer, 1955), comb. nov. (♂, Cameroon), M.jumbo (Strand, 1913), comb. nov. (♂♀, Central & East Africa), M.kiboschensis (Lessert, 1915), comb. nov. (♂♀, Central & East Africa), M.keniana (Roewer, 1955), comb. nov. (♀, Kenya), M.lawrencei (Roewer, 1955), comb. nov. (♀, Zimbabwe), M.longimamillata (Roewer, 1955), comb. nov. (♀, Mozambique), M.moschiensis (Roewer, 1955), comb. nov. (♀, Tanzania), M.mossambica (Roewer, 1955), comb. nov. (♀, Mozambique), M.nyassana (Roewer, 1955), comb. nov. (♀, Malawi), M.teteana (Roewer, 1955), comb. nov. (♂, Mozambique) and M.zuluana (Roewer, 1955), comb. nov. (♀, South Africa).
Elbamycella rosea gen. et sp. nov. (Juncigenaceae, Torpedosporales) isolated from the Mediterranean Sea
Authors: Poli Anna , Bovio Elena , Verkley Gerard , Prigione Valeria , Varese Giovanna Cristina
Published: June 2019

Elbamycellaroseasp. nov., introduced in the new genus Elbamycella, was collected in the Mediterranean Sea in association with the seagrass Posidoniaoceanica and with the brown alga Padinapavonica. The affiliation of the new taxon to the family Juncigenaceae is supported by both morphology and phylogenetic inference based on a combined nrSSU and nrLSU sequence dataset. Maximum-likelihood and Bayesian phylogeny proved Elbamycellagen. nov. as a distinct genus within Juncigenaceae. The new genus has been compared with closely related genera and is characterised by a unique suite of characters, such as ascospores with polar appendages and peculiar shape and dimension of ascomata and asci.
Prioritising potential incursions for contingency planning: pathways, species, and sites in Durban (eThekwini), South Africa as an example
Authors: Padayachee Ashlyn L. , Procheş Şerban , Wilson John R. U.
Published: June 2019

Increased trade and travel have resulted in an increasing rate of introduction of biological organisms to new regions. Urban environments, such as cities, are hubs for human activities facilitating the introduction of alien species. Additionally, cities are susceptible to invading organisms as a result of the highly altered and transformed nature of these environments. Despite best efforts at prevention, new incursions of alien species will occur; therefore, prioritising incursion response efforts is essential. This study explores these ideas to identify priorities for strategic prevention planning in a South African city, Durban (eThekwini), by combining data from alien species watch lists, environmental criteria, and the pathways which facilitate the introduction of alien species in the city. Three species (with known adverse impacts elsewhere in the world) were identified as highly likely to be introduced and established in Durban (Alternantheraphiloxeroides,LithobatescatesbeianusandSolenopsisinvicta). These species are most likely to enter at either the Durban Harbour; pet and aquarium stores; or plant nurseries and garden centres – therefore active surveillance should target these sites as well as adjacent major river systems and infrastructure. We suggest that the integrated approach (species, pathways, and sites) demonstrated in this study will help prioritise resources to detect the most likely and damaging future incursions of alien species.
Application of spiking neural networks for modelling the process of high-temperature hydrogen production in systems with gas-cooled reactors *
Authors: Starkov Sergey O, , Lavrenkov Yury N,
Published: June 2019

Hydrogen energy is able to solve the problem of the dependence of modern industries on fossil fuels and significantly reduce the amount of harmful emissions. One of the ways to produce hydrogen is high-temperature water-steam electrolysis. Increasing the temperature of the steam involved in electrolysis makes the process more efficient. The key problem is the use of a reliable heat energy source capable of reaching high temperatures. High-temperature gas-cooled reactors with a gaseous coolant and a graphite moderator provide a solution to the problem of heating the electrolyte. Part of the heat energy is used for producing electrical energy required for electrolysis. Modern electrolyzers built as arrays of tubular or planar electrolytic cells with a nuclear energy source make it possible to produce hydrogen by decomposing water molecules, and the working temperature control leads to a decrease in the Nernst potential. The operation of such facilities is complicated by the need to determine the optimal parameters of the electrolysis cell, the steam flow rate, and the operating current density. To reduce the costs associated with the process optimization, it is proposed to use a low-temperature electrolysis system controlled by a spiking neural network. The results confirm the effectiveness of intelligent technologies that implement adaptive control of hybrid modeling processes in order to organize the most feasible hydrogen production in a specific process, the parameters of which can be modified depending on the specific use of the reactor thermal energy. In addition, the results of the study confirm the feasibility of using a combined functional structure made on the basis of spiking neurons to correct the parameters of the developed electrolytic system. The proposed simulation strategy can significantly reduce the consumption of computational resources in comparison with models based only on neural network prediction methods.
A review on combined effects of moniliformin and co-occurringFusarium toxins in farm animals
Authors: Fremy J.-M. , Alassane-Kpembi I. , Oswald I.P. , Cottrill B. , Van Egmond H.P.
Published: June 2019

Co-occurrence of mycotoxins in food and feed represents the rule rather than the exception. Information about combinatory toxic effects of co-occurring mycotoxins is scarce, in particular the effects that mixtures of mycotoxins in feed may have on farm animals. This review focusses on studies on the combined effects of moniliformin and co-occurring mycotoxins in feed on farm animals. Moniliformin is a mycotoxin of emerging scientific interest, which may co-occur with many other mycotoxins, especiallyFusarium mycotoxins. Oral exposure to moniliformin reduces feed consumption and body weight gain in poultry, in pigs and catfish, and induces cardiotoxic effects and/or alterations in serum biochemical and haematological parameters. In this review only experiments comparing effects as a result of the exposure to a combination of mycotoxins with effects due to the exposure to single mycotoxins were considered. Identified published studies on combined toxicity have been limited to combinations of moniliformin with either fumonisin B1 or deoxynivalenol, and were performed with poultry, pigs, and catfish. Most of the moniliformin/fumonisin B1 investigations involved poultry and focussed on adverse effects on feed intake, weight gain and immune response, as well as organ lesions. These studies mainly reported an interactive toxicity of moniliformin and fumonisin B1 but did not allow identification of the type of interaction. Likewise, no indication could be given for the interaction detected for both mycotoxins on weight gains of catfish. For the moniliformin/deoxynivalenol combination, only one study with broiler chickens was found relevant. This study concluded additive or less than additive toxicity, using kidney lesions and renal tubular epithelial degeneration as endpoints. While possible interactions between moniliformin and fumonisin B1 or deoxynivalenol were identified, the conclusions are based on limited studies and experimental designs. Further studies on the combined toxicity of moniliformin with other mycotoxins and other animal species would be needed.
Technological change, opening and internationalization of Spanish telecommunications. The transition to the third generation of mobile telephony
Authors: Calvo Calvo Ángel Amado
Published: June 2019

This article explores from a multidisciplinary and transnational historical approach the impact of technological change on the structure of the telephone sector, the fruit of advances in microelectronics and information technology. This problem has been studied in Spain basically by regulatory specialists, on the one hand, and technologists, on the other. We lack a more transversal analysis that puts into play the various elements that intervene. This article is intended to cover this gap, based on unpublished primary sources –primarily from Telefónica– as well as in other documents of diverse origin. Specifically, it focuses on the role played by Spain and the historic telephone company (Telefónica) in the transition to the third generation of mobile telephony (Universal Mobile Telecommunications System, UMTS) and gives prominence to the national state, to the supranational bodies –EU and International Telecommunication Union(ITU) and companies.
Depression and Its Impact on Adolescents
Authors: Moukaddam Nidal , Cavazos Eloy , Nazario Michelle , Murtaza Syed , Shah Asim A.
Published: June 2019

The adolescent period is a crucial time for brain development. Emotional skills mature, knowledge deepens, and coping skills develop. However, the development of depression during this period of life can have severe and potentially permanent effects on a person's life. The prevalence of adolescents with mental disorders, especially depression, has been steadily increasing. The diagnosis of depression is often accompanied by co-occurring, comorbid disorders (eg, psychosis, anxiety, conduct issues, and oppositional defiant behavior), addictive behaviors, and a preexisting or ongoing history of traumatic exposure. Untreated depression affects the ability to pursue education, to be consistently employed, and to have adequate physical health. Treatment options for depression in adolescents include pharmacological management and psychotherapy. Only two antidepressant agents (fluoxetine and escitalopram) are approved for treatment of depression in adolescents, with no approved augmentation agents. Psychotherapeutic interventions that include the family network show advantage over individual-centered therapy alone. Among individual-centered therapies, cognitive-behavioral interventions have the most support. A modular treatment approach with multifocus areas is the most effective, with shorter treatment duration and faster, more sustained symptomatic improvement. In cases of comorbid depression and substance use, treatment of substance use is usually not enough, so treatment of depressive symptoms is also necessary. Lastly, the contribution and impact of trauma in the genesis and perpetuation of depression cannot be emphasized enough, and successful treatment needs to address trauma antecedents and prioritize safety.

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Psychiatr Ann.
2019;49(6):256–262.]