bluuebunny/crossref_metadata_2025 huggingface dataset:
Existence of a weak bounded solution for nonlinear degenerate elliptic equations in Musielak-Orlicz spaces
Authors: Bourahma M. , Bennouna J. , El Moumni M.
Published: April 2020

In this paper, we show the existence of solutions for the nonlinear elliptic equations of the form

{

-
div
 
a

(

x
,
u
,
∇
u

)

=
f
,

u
∈

W

0
1

L
ϕ

(
Ω
)

∩

L

∞

(
Ω
)

,

\left\{ {\matrix{ { - {\rm{div}}\,a\left( {x,u,\nabla u} \right) = f,} \hfill \cr {u \in W_0^1L\varphi \left( \Omega \right) \cap {L^\infty }\left( \Omega \right),} \hfill \cr } } \right.

where

a

(

x
,
s
,
ξ

)

⋅
ξ
≥

ϕ
¯

x

-
1

(

ϕ

(

x
,
h

(

|
s
|

)

)

)

ϕ

(

x
,

|
ξ
|

)

a\left( {x,s,\xi } \right) \cdot \xi \ge \bar \varphi _x^{ - 1}\left( {\varphi \left( {x,h\left( {\left| s \right|} \right)} \right)} \right)\varphi \left( {x,\left| \xi \right|} \right)

and h : ℝ+→]0, 1] is a continuous decreasing function with unbounded primitive. The second term f belongs to LN
(Ω) or to Lm
(Ω), with

m
=

r
N

r
+
1

m = {{rN} \over {r + 1}}

for some r > 0 and φ is a Musielak function satisfying the Δ2-condition.
Tabagismo e consumo de álcool em adolescentes de uma cidade de pequeno porte do Brasil
Authors: Silva Adelson Fernandes da , Xavier Laís Castilho , Dos Santos Larissa Ferreira , Santos Maria Clara Alvaro , Figueiredo Salete Aparecida Duarte , Carvalho Deyvid Rafael Dias , Souza Felipe Galdino , Jacques Nívea Maria de Oliveira , De Lima Tiago Rodrigues , Silva Diego Augusto Santos
Published: April 2020

Objetivo: Estimar a prevalência e os fatores sociodemográficos associados ao tabagismo e ao consumo de álcool em adolescentes escolares residentes em uma cidade de pequeno porte do Brasil. Métodos: Estudo transversal, conduzido em 583 escolares de 15 e 18 anos, de escolas públicas estaduais. Os dados foram coletados através do questionário “Estilo de Vida dos Adolescentes Manauara”. Resultados: Maiores chances (OR: 4,26; IC95%: 1,31-13,82) de ser ex-fumante foram verificadas nos escolares que residiam em áreas rurais. Além disso, ser do sexo masculino (OR: 5,18; IC95%: 1,39-19,28), estar na faixa etária de 17-18 anos (OR: 1,96; IC95%: 1,16-3,30) e estudar no turno de estudo vespertino (OR: 7,66; IC95%: 1,62-36,24) foi relacionado com maiores chances de ser fumante. Os adolescentes de faixa etária 17 a 18 anos tiveram 113% mais chances de consumirem álcool de maneira excessiva (OR: 0,37; IC95%: 0,25-2,78). Conclusão: A prevalência estimada para tabagismo foi inferior comparado ao consumo de álcool. Os subgrupos de adolescentes que tiveram maiores chances de fumar e consumir álcool, foram os escolares do sexo masculino com a faixa etária 18-19 anos.
Síndrome do intestino irritável: diagnóstico e tratamento
Authors: Fernandes Maria Clara Souza , Castro Mateus de Souza , Lima Yana de Medeiros Souza , Barreto Amanda Chagas , Vasconcelos Ângela Milhomem , Brito Carlos Rafael Alves de , Santana Julia Medeiros , Barreiros Pâmela Gabrielle Lima , Peres Yago Correa , Brito Ana Paula Santos Oliveira
Published: April 2020

Objetivo: Realizar uma revisão integrativa de artigos publicados em língua inglesa e portuguesa nos últimos sete anos, voltados para as melhores modalidades de diagnóstico e tratamento para abordagem da Síndrome do Intestino Irritável (SII). Métodos: Este estudo constitui-se de uma revisão integrativa, realizada entre janeiro de 2012 e abril 2018, no qual realizou-se uma consulta a livros, periódicos e artigos científicos através de busca no banco de dados do Scientific Electronic Library Online (Scielo) e da Biblioteca Regional de Medicina (Bireme), a partir das fontes Medical Literature Analysis and Retrieval System Online (Medline) e Literatura Latino-americana e do Caribe em Ciências da Saúde (Lilacs). A pesquisa dos artigos foi realizada entre fevereiro e abril de 2018, com o auxílio das palavras-chave Síndrome do Intestino Irritável, Diagnóstico e Tratamento. Resultados: Foram selecionados 26 artigos, realizou-se a análise em busca dos critérios diagnósticos e medidas terapêuticas mais atuais, destes, 10 artigos discorreram sobre as atualizações dos critérios diagnósticos, enquanto 16 artigos analisaram as melhores condutas terapêuticas. Considerações finais: A SII é uma doença heterogênea, a qual deve ser diagnosticada de acordo com os critérios de Roma IV e seus portadores devem receber uma abordagem individualizada, direcionada à melhora na qualidade de vida.
Teknolojinin Savaşı Dönüştürmesinde Yeni Bir Aşama: Robotik Savaş
Authors: KABACAOĞLU Özgün
Published: April 2020

Savaş,
insan doğası söz konusu olduğunda, alet yapımı ile başlayan bir gerçekliktir ve
kullanılan aletler ile doğrudan ilgilidir. Savaşın önemine koşut olarak, bu
aletlerde bir diğer değişle silahlardaki üstünlük yarışı da insanlık tarihi ile
yaşıttır. Bu yarış içerisinde kalabilmek ise o kadar önemlidir ki, birbirinden
farklı coğrafya ve kültürlere sahip ülkeler hep aynı ortak kaygıyı paylaşırlar
ve yeri geldiğinde sarsılmaz denilen kurumlarını, yeni silahların getiri ve
götürüleri bağlamında değiştirirler. Günümüzde geliştirilen silahlar ise artık
insanı dışlamaktadır. Robotik sistemler diyebileceğimiz yeni silahlar yepyeni
bir savaş ortamı yaratmaktadır. Yeni ortam, yeni kurumlar gerektirecektir.
Teknolojinin belirleyiciliğinin esas olduğu bu ortamda robotik savaşı anlamamız
elzemdir.
Taşıcıyı Bitkilerin TMS 16: Maddi Duran Varlıklar Standardı Kapsamında Muhasebeleştirilmesi: Fındık Yetiştiriciliği Yapan Bir Tarım İşletmesinde Uygulama
Authors: KELEŞ Dursun , ÖZULUCAN Abitter
Published: April 2020

Taşıyıcı bitkiler, bir hesap döneminden daha uzun süre tarımsal ürün üretmek amacıyla yetiştirilen ve kendisinin kalıntı değeri haricinde tarımsal ürün olarak satış olasılığı çok düşük olan canlı varlıklardır. Bu bitkilerin büyüme, çoğalma ve kuruma gibi biyolojik dönüşüm geçirme özellikleri bulunmaktadır. Bu özellikler ise, taşıyıcı bitkilerin muhasebeleştirme ve değerleme işlemlerini özellikli kılmaktadır. Bu çalışmanın amacı, TMS 16-Maddi Duran Varlıklar Standardı kapsamında taşıyıcı bitkilerin muhasebeleştirilmesine ilişkin esasların açıklanmasıdır. Bu amaç doğrultusunda, Türkiye’de kurumsal olarak fındık yetiştiriciliği faaliyetlerinde bulunan bir tarım işletmesinin yasal izinler çerçevesinde temin edilen verileri kullanılarak 2017 yılındaki faaliyetlerine yönelik uygulama yapılmıştır. Bu uygulama kapsamında, ilk verim dönemindeki taşıyıcı bitkilerin TMS 16’ya göre muhasebeleştirilme ve dönem sonu değerleme işlemleri gerçekleştirilmiştir.
Endowing TADF Luminophors with AIE Properties Though Adjusting Flexible Dendrons for Highly Efficient Solution-Processed Nondoped OLEDs.
Authors: Wei Jingyi , Liu Dan , Tian Wenwen , Jiang Wei , Sun Yueming , zhao zheng , Tang Ben Zhong
Published: April 2020

The amalgamation of thermally activated delayed fluorescence (TADF) and aggregation-induced emission (AIE) properties, term AIE-TADF, is a promising strategy to design novel robust luminescent materials. Herein, we transform 2,3,4,5,6-penta(9H-carbazol-9-yl)benzonitrile (5CzBN) from an ACQ molecule to AIEgens by simply decorating a 5CzBN core with alkyl chain-linked spirobifluorene dendrons. By increasing the number of flexible dendrons, these materials can not only show obvious AIE-TADF characteristics and uniform film morphology, but also exhibit better resistance to isopropyl alcohol, which are beneficial to the fully solution-processed OLEDs. Notably, 5CzBN-PSP show great device efficiency with external quantum efficiency (EQE), current efficiency and power efficiency of 20.1%, 58.7 cd A-1 and 46.2 lm W-1, respectively, which achieved record-breaking efficiency in solution-processed nondoped OLEDs based on AIE emitters. It demonstrates a general approach to explore new efficient emitters by the marriage of AIE and TADF what could potentially improve their performance in various areas.
Unraveling Minimum Active Units and Substrate Activation for Carbon Nitride in Photocatalytic Oxidation Reactions
Authors: Huang Chaofeng , Wen Yaping , Dong Dandan , Shen Yanfei , Liu Songqin , Ma Haibo , Zhang Yuanjian
Published: April 2020

Covalent bonded carbon nitride (CN) has stimulated extensive attentions from photosynthesis to optoelectronics. However, the acquisition of correct numbers beyond stoichiometry and composition remains indefinable. Moreover, the electronic coupling by the substrates to the photoexcitation processes in value-added oxidation reactions is essential, but still poorly understood. Herein, we report by far the minimum active structure of CN by constructing fragments consisting of melem (M1) and its incomplete condensed form with cyanide termination (M2). Surprisingly, such configuration endowed a boosted activity of 11 times of traditional bulk CN in photocatalytic oxidation of tetracycline as a showcase application of water cleaning and sanitation. The mechanism studies disclosed that M1 and M2 were primarily responsible for light absorption and charge separation, respectively; meanwhile the electronic coupling by the O2 substrate participated the photoexcited processes thus synergistically enhanced the photocatalytic reactions.
Ammonia Formation Catalyzed by Dinitrogen-Bridged Dirhenium Complex Bearing PNP-Pincer Ligands under Mild Reaction Conditions
Authors: Meng Fanqiang , Kuriyama Shogo , Tanaka Hiromasa , Egi Akihito , Yoshizawa Kazunari , Nishibayashi Yoshiaki
Published: April 2020

A series of rhenium complexes bearing a pyridine-based PNP-type pincer ligand are synthesized from rhenium phosphine complexes as precursors. A dinitrogen-bridged dirhenium complex bearing the PNP-type pincer ligands catalytically converts dinitrogen into ammonia in the reaction with KC8 as a reductant and [HPCy3]BArF4 (Cy = cyclohexyl, ArF = 3,5-(CF3)2C6H3) as a proton source at –78 °C to afford 8.4 equiv of ammonia based on the rhenium atom of the catalyst. The rhenium-dinitrogen complex also catalyzes silylation of dinitrogen in the reaction with KC8 as a reductant and Me3SiCl as a silylating reagent under ambient reaction conditions to afford 11.3 equiv of tris(trimethylsilyl)amine based on the rhenium atom of the catalyst. These results demonstrate the first successful example of catalytic nitrogen fixation under mild reaction conditions by using rhenium-dinitrogen complexes as catalysts.
A Generative Deep Learning Approach for the Discovery of SARS CoV2 Protease Inhibitors
Authors: Shaker Noor , Abou-Zleikha Mohamed , AlAmri Mubarak , Mehellou Youcef
Published: April 2020

COVID19 has caused thousands of deaths worldwide within a few months. The rapid spread of this virus that causes COVID19, termed SARS CoV2, has been facilitated by the lack of effective vaccines and treatments against this virus. In recent months, our team has developed a novel deep learning platform, Rosalind, for drug design and optimisation, and it enables rapid in silico discovery and evaluation of novel chemical designs. In the current work, we applied Rosalind for the rapid discovery of SARS CoV2 replication inhibitors that target the virus main protease Mpro. Through a series of training and optimisation rounds based on reported SARS CoV2 Mpro inhibitors helped by docking into the recently reported crystal structures of SARS CoV2 Mpro and medicinal chemistry input, we identified the a series of promising SARS CoV2 Mpro inhibitors. These compounds are presented in this work so they scientific community could pursue them while we continue our deep learning-based work in a collaborative manner to identify lead SARS CoV2 Mpro compounds with excellent drug-like properties that could be developed in a timely manner to address the urgent need for new and effective COVID19 treatments.
Epitaxial GaN using Ga(NMe2)3 and NH3 Plasma by Atomic Layer Deposition
Authors: Rouf Polla , O'Brien Nathan J , Buttera Sydney C. , Martinovic Ivan , Bakhit Babak , Martinsson Erik , Palisaitis Justinas , Hsu Chih-Wei , Pedersen Henrik
Published: April 2020

Low temperature deposition of high-quality epitaxial GaN is crucial for its integration inelectronic applications. Chemical vapor deposition at approximately 800 °C using SiC with anAlN buffer layer or nitridized sapphire as substrates is used to facilitate the GaN growth. Here,we present a low temperature atomic layer deposition (ALD) process usingtris(dimethylamido)gallium(III) with NH3 plasma. The ALD process shows self-limitingbehaviour between 130-250 °C with a growth rate of 1.4 Å/cycle. The GaN films produced werecrystalline on Si(100) at all deposition temperatures with a near stochiometric Ga/N ratio withlow carbon and oxygen impurities. When GaN was deposited on 4H-SiC, the films grewepitaxially without the need for an AlN buffer layer, which has never been reported before. The bandgap of the GaN films was measured to be ~3.42 eV and the fermi level showed that the GaN was unintentionally n-type doped. This study shows the potential of ALD for GaN-basedelectronic devices.
Dispersion State Phase Diagram of Citrate-Coated Metallic Nanoparticles in Saline Solutions
Authors: Franco Ulloa Sebastian , Tatulli Giuseppina , Bore Sigbjørn Løland , Moglianetti Mauro , Pompa Pier Paolo , Cascella Michele , Vivo Marco De
Published: April 2020

The fundamental interactions underlying citrate-mediated chemical stability of metal nanoparticles (NPs), and their surface characteristics dictating particle dispersion/aggregation in aqueous solutions, are largely unclear. Here, we used a newly developed theoretical model to estimate the stoichiometry of citrate molecules chemisorbed onto spherical metallic NPs and define the uncovered solvent-accessible surface area of the NP. Then, we exploited two-body free energy calculations and extended coarse-grained molecular dynamics simulations of citrate-capped metallic NPs in saline solutions to explore an experimentally relevant range of NP charge, as well as the electrolytic medium’s ionic strength, a known trigger for aggregation. In this way, we define dispersion state phase diagrams of citrate-capped metal nanocolloids. UV-vis spectroscopy experiments validated our predictions and extended our results to NPs up to 35 nm. Altogether, our results disclose a complex interplay between the particle size, its surface charge density, and the ionic strength of the medium, which ultimately clarifies how these variables impact colloidal stability.
Filling Vacancies in a Prussian Blue Analogue Using Mechanochemical Post-Synthetic Modification
Authors: Cattermull John , Wheeler Samuel , Hurlbutt Kevin , Pasta Mauro , Goodwin Andrew
Published: April 2020

Mechanochemical grinding of polycrystalline powders of the Prussian blue analogue (PBA) Mn[Co(CN)$_{\textbf6}$]$_{\textbf{2/3}}\boldsymbol\Box_{\textbf{1/3}}\cdot\boldmath x$H$_{\textbf 2}$O and K$_{\textbf 3}$Co(CN)$_{\textbf 6}$ consumes the latter and chemically modifies the former. A combination of inductively-coupled plasma and X-ray powder diffraction measurements suggests the hexacyanometallate vacancy fraction in this modified PBA is reduced by approximately one third under the specific conditions we explore. We infer the mechanochemically-driven incorporation of [Co(CN)$_{\textbf 6}$]$^{\textbf 3-}$ ions onto the initially-vacant sites, coupled with intercalation of charge-balancing K$^+$ ions within the PBA framework cavities. Our results offer a new methodology for the synthesis of low vacancy PBAs, unlocking novel, high capacity PBA battery materials.
Nutraceutical characterization and shelf life analysis of millet incorporated nutrition bars
Authors: Kerenhappuch Susan Samuel  , Nazni P.
Published: April 2020

Recently, the nutraceutical sector of the food trade is unfolding, and designer foods such as nutrition bars have found their place in this competitive industry. The inclusion of underutilized food sources in the development of new value-added products is ingenious. Millets, the indigenous crop, are a good source of nutrients. The Nutri-cereal is still lacking commercial success and deserves recognition in the food-processing sector. In the current study, foxtail and pearl millet are used to develop foxtail millet meal replacement bar (FMRB) and pearl millet protein bar (PPB), respectively. Three variants of each type (25%, 27.5%, and 30% incorporation of millets) were developed to derive the nutritionally preferred variants. Estimation of macronutrients, essential amino acids, and vitamin content was done. The storage stability of the selected variants was evaluated for 42 days under accelerated conditions.  The peroxide value, moisture content, water activity, total plate count, and yeast & mold count was assessed. The result revealed, among the variants, 30% FMRB (V-3) and 25% PPB (V-4) are the nutritionally finest bars. The shelf-life testing pointed out that the protein bar deteriorates rapidly than the meal replacement bar.  The correlation between the nutrient composition and shelf-life assessment factors indicated the shelf-life parameters negatively correlate with carbohydrates present in the bars. However, fat and protein have a positive correlation with shelf-life parameters (r= 1.00, p<0.01).  Favorable storage conditions and appropriate packing material that is conducive to retain the stability of the product can extend the shelf-life. Millet nutrition bars would revolutionize the agriculture and food industry. Thus, increasing the consumption of millets.
The novel coronavirus and its possible treatment by vaccines, therapeutics and drug delivery systems: Current status and future perspectives
Authors: Madhurya Kadavakollu  , Veera Venkata Satyanarayana Reddy Karri  , Kuppusamy Gowthamarajan  , Arun Radhakrishnan  , Dhanabal Palanisamy  , Somanathan Balasubramanian  , Suresh Bhojraj
Published: April 2020

In the mid-end of December 2019, several cases of pneumonia outbreak of unknown cause and etiology were identified in Wuhan City of Hubei province in China, a city with a population of over 11 million.Till date(April 2020) around 1,051,635 confirmed cases of coronavirus disease 2019(COVID-19) and 56,985 confirmed deaths have been reported according to COVID-19 Situation Report – 75 by WHO. On 7th January 2020, the causative agent was identified and named consequently as Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) by the Chinese Centre for Disease Control and Prevention (CCDC) from throat swab samples. Later, on 12th January 2020, this coronavirus was named as 2019-novel coronavirus (2019-nCoV) by World Health Organization (WHO) and in 11th February 2020,it has been declared the epidemic disease caused by SARS-CoV-2 as Corona Virus Disease 2019(COVID-19) as it is spreading rapidly from its origin in Wuhan City to the rest of the world. In this context, the current review provides a landscape of the novel Corona Virus including its origin, transmission, epidemiology, drugs and vaccines in clinical trials for better understanding to the reads and peoples the status and future perspectives of this pandemic disease
Problems of Measurements in the Management of Social Objects: Yesterday, Today, Tomorrow
Authors: Marshev V. I.
Published: April 2020

.
Transformation of Corporate Governance and Property relations in a Digital Society
Authors: Loseva O. V. , Tazikhina T. V. , Fedotova M. A.
Published: April 2020

The need to transform corporate governance and property relations in a digital society stems from the emerging new realities associated with the emergence of digital assets, new intellectual property objects, and the increasing role of human capital and intellectual capital in innovation. The purpose of the work is to identify trends and directions of transformation of property relations and corporate relations that are inherent in the digital society. The methodological basis of the study was the categorical apparatus of economic theory, institutional theory, methods of dialectics, statistical analysis, principles of formal logic, a systematic approach, scientific works of leading domestic and foreign scientists in the field of property theory and corporate relations. The trends that determine the direction of property modification caused by the formation of a digital society are identified; it is proved that the leading forms of ownership are digital assets and intellectual property objects. It is proved that ensuring a technological breakthrough requires strengthening the role of the human factor and a new human-oriented approach to the transformation of corporate relations. Trends of corporate governance modification in the digital society are revealed. The findings can be used in practice by company management when developing corporate governance strategies.
O ENSINO DAS RELAÇÕES RACIAIS EM GEOGRAFIA: PROPOSIÇÕES PARA A SALA DE AULA
Authors: Marques Ana Carolina Dos Santos , Fonseca Ricardo Lopes
Published: April 2020

O racismo é um fenômeno que estrutura a vida da população negra. À medida que se materializa no espaço geográfico, ele segrega os(as) negros(as) e restringe suas espacialidades. A escola se evidencia como uma instituição que possui grandes contribuições na luta pela superação do racismo, assim como o ensino de Geografia que pode proporcionar uma educação que contemple de forma positiva o povo negro. Nesse sentido, a pesquisa objetiva sugerir proposições pedagógicas que oferecem caminhos de como a questão racial pode ser discutida nas aulas de Geografia. As proposições foram elaboradas com base nas Diretrizes Curriculares da Educação (DCE) Básica do Paraná e no modelo didático proposto por Gasparin (2011). Espera-se fomentar o debate das questões raciais no ensino de Geografia e contribuir para um ensino de Geografia que incorpore a Lei 10.639/03 em seu currículo.
Statistical analysis of the parameters and grain size distribution functions of single-phase polycrystalline materials
Authors: Arkhangelskiy S. I. , Levin D. M.
Published: April 2020

A statistical analysis of the grain size distribution is important both for developing theories of the grain growth and microstructure formation, and for describing the size dependences of various characteristics of the physical and mechanical properties of polycrystalline materials. The grain size distribution is also an important characteristic of the structure uniformity and, therefore, stability of the properties of the products during operation. Statistical Monte Carlo modeling of single-phase and equiaxed polycrystalline microstructures was carried out to determine the type of statistically valid distribution function and reliable estimates of the average grain size. Statistical parameters (mean values, variances, variation coefficient) and distribution functions of the characteristics of the grain microstructure were obtained. It is shown that the distribution function of the effective grain sizes for the studied polycrystal model is most adequately described by γ-distribution, which is recommended to be used in analysis of the experimental distribution functions of grain sizes of single-phase polycrystalline materials with equiaxed grains. The general average (mathematical expectation) of the effective grain size (projection diameter) with γ-distribution function (parameters of the distribution function are to be previously determined in analysis of the grain structure of polycrystalline materials) should be taken as a statistically valid and reliable estimate of the average grain size. The results of statistical modeling are proved by the experimental data of metallographic study of the microstructures of single-phase model and industrial materials with different degree of the grain structure heterogeneity.
Strong associations and moderate predictive value of early symptoms for SARS-CoV-2 test positivity among healthcare workers, the Netherlands, March 2020
Authors: Tostmann Alma , Bradley John , Bousema Teun , Yiek Wing-Kee , Holwerda Minke , Bleeker-Rovers Chantal , ten Oever Jaap , Meijer Corianne , Rahamat-Langendoen Janette , Hopman Joost , van der Geest-Blankert Nannet , Wertheim Heiman
Published: April 2020

Healthcare workers (n = 803) with mild symptoms were tested for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (n = 90 positive) and asked to complete a symptom questionnaire. Anosmia, muscle ache, ocular pain, general malaise, headache, extreme tiredness and fever were associated with positivity. A predictive model based on these symptoms showed moderate discriminative value (sensitivity: 91.2%; specificity: 55.6%). While our models would not justify presumptive SARS-CoV-2 diagnosis without molecular confirmation, it can contribute to targeted screening strategies.
BIOLOGY TEACHER PROCEDURAL JUSTICE BASED ON SCHOOL LEADERSHIP AND PERSONALITY
Authors: Nasution Satri Dwi Kurnia , I Made Putrawan  , Vivanti Diana
Published: April 2020

Biology teacher needs to have procedural justice in delivering learning material related to school leadership and personality. That is why the objective of this research is to analyze the relationship between school leadership, personality, and procedural justice of Biology teachers. A survey used by selecting 85 Biology teachers at Karawang regency by using Simple Random Sampling (SRS). There were three instruments developed to measure school leadership (45 items) with reliability of 0.805, personality (32 items) with reliability 0.819, and procedural justice (27 items) with reliability 0.642. Data were analyzed by regressioncorrelation analysis. The result showed that school leadership and personality have a positive and significant correlation with procedural justice. These findings mean when procedural justice would be improved, factors such as school leadership and personality could be taken into account.
ETHER AND EQUIVALENCE OF INERTIAL FRAMES OF REFERENCE
Authors: Chubykalo Andrew , Espinoza Augusto , Kuligin Victor , Korneva Maria
Published: April 2020

The paper discusses the problem of equality of Inertial frames of reference IFR. The hypothesis of a physical ether, whose properties do not depend on the choice of an inertial reference frame, is proposed. Based on the concept of the physical ether, it turns out the features of instantaneous action at a distance. It is shown that there is a class of transformations that preserves Maxwell’s equations unchanged. The problem of choosing a transformation is posed. This choice should be based on experimental research.
SENSITIVE SKIN SYNDROME AND ENDOCRINE DISRUPTORS - IS THERE A CONNECTION?
Authors: Georgieva Filka
Published: April 2020

Background: Sensitive Skin Syndrome (SSS) is predominantly a self-defined condition without an objective pathological finding. The syndrome presents with sudden and easily provoked flushes accompanied by unpleasant sensations like itching, pain, numbness in response to stimuli that usually do not cause such sensations. Endocrine disruption (ED) is an exogenous substance or mixture that induce negative health problems through affecting function(s) of the endocrine system in an intact organism. The Aim of The Study: was to establish the role of ED as a causative agent in SSS. Objective and Methods: The presented study includes 304 female self-diagnosed with SSS. Demographic data were collected from registers of Medico-Aesthetic Center “Medea” Varna from April 2017 till April 2019. The model of the study investigates the causes of SSS. Results: Results show the overall frequency of SSS was 31, 97%. As 174 (57, 23%) diagnosed in aesthetic visitors and 130 (42, 77%) in those with some health problem. The distribution according to the trigger factor show the prevalence of cosmetic products -56, 90%, detergents 21.05% and cosmetic procedures- 40, 88%. Conclusion: SSS is a serious health problem. The data from our study show that trigger factors, which are closely connected with EDC have a significant impact on this syndrome. In addition, adding topical treatment worsen rather than improve SSS. The literature sources reveal that this is first study of the role of ED as a causative agent in SSS in our country.
EUTROPHICATION PROCESSAND WATER QUALITY INDICES
Authors: Hussein Rabar Mohammed , Sen Bulent , Sonmez Feray
Published: April 2020

The paper recent by indices of water quality and effects of eutrophication, Water is one of the most widely distributed substances across the world’s surface and is crucial for a variety of aspects of human health, development and well-being as well as for the functioning of natural ecosystems. Eutrophication is an environmental process enrichment of waters by inorganic nutrients, especially these nutrients are nitrogen and phosphors and results from primary productions. On the other hand, Pollution by eutrophication due to the problems in lakes, rivers and marine habitat. Water quality is important for our health and well-being, can be used for diffident purposes.
A REVIEW ON CLOUD COMPUTING SERVICES AND CONVERGENCE AMONG CLOUD COMPUTING AND BIG DATA
Authors: Sanagavarapu Krishna Chaitanya
Published: April 2020

Cloud Computing enables a practical, as needed and also scalable network access to a common swimming pool of configurable computing resources. This paper mainly focuses on a usual technique to integrate the Internet of Things (IoT) as well as Cloud Computer under the name of Cloud Things style. We evaluate the state-of-the-art for integrating Cloud Computer as well as the Internet of Things. The objective is to give a faster as well as easier platform for the customer to get information from an array of sensor nodes that has actually been set-up in a farming system.
IDENTIFIKASI KROMOSOM HOMOLOG MELALUI DETEKSI NUCLEOLUS ORGANIZER REGIONS DENGAN PEWARNAAN AgNO3 PADA TANAMAN BAWANG MERAH - IN PRESS -
Authors: Puspita Andin , Setiawan Agus Budi , Purwantoro Aziz , Sulistyaningsih Endang
Published: April 2020

Generally, the standard procedure for karyotype analysis of shallot is sorted by chromosome sizes. Therefore, the identification of homologous chromosomes is difficult without using a specific probe. Nucleolus Organizing Regions (NORs) can be used as a probe for precise identification of homologous chromosomes. However, the use of NORs for plant karyotyping in Indonesia is poorly investigated. In this study, shallot chromosomes were prepared using modified Carnoy’s solution II, fixed in Carnoy’s solution, and stained by using aceto-carmine and AgNO3 for detecting NORs. Chromosome images were analyzed by CHIAS IV. One locus NOR bearing chromosome pair was detected at metaphase and interphase, and it was located at short arms of subtelomeric chromosome number 6. NORs can be used as a probe for precise identification of homologous chromosomes in shallot. Therefore, this technique has the potential to be applied on species closely related to shallot and on other plant species.Keywords: AgNO3, chromosome condensation, NORs, shallot chromosome, shallot karyotype ABSTRAKProsedur kariotipe untuk bawang merah umumnya masih disusun berdasarkan ukuran kromosom, sehingga diperlukan suatu penanda yang dapat mengidentifikasi kromosom homolog secara presisi. Identifikasi kromosom homolog secara presisi menggunakan suatu penanda, khususnya deteksi Nucleolus Organizing Regions (NORs), yang di Indonesia masih jarang dilakukan. Penelitian ini bertujuan untuk membuat kariotipe dan mengidentifikasi kromosom homolog bawang merah melalui deteksi NORs menggunakan metode pewarnaan AgNO3. Proses fiksasi akar dilakukan dengan menggunakan modifikasi larutan Carnoy II, lalu difiksasi dengan larutan Carnoy, dan kromosom diwarnai dengan aceto-carmine dan larutan AgNO3 untuk mendeteksi NORs. Selanjutnya, citra kromosom dianalisis menggunakan CHIAS IV. Hasil penelitian menunjukkan bahwa terdapat sepasang NORs yang terdeteksi pada fase metafase dan interfase yang  terletak pada bagian lengan pendek di kromosom subtelosentrik nomor 6. Hasil dari penelitian ini dapat dijadikan sebagai dasar di bidang sitogenetika bawang merah untuk mengidentifikasi kromosom homolog secara presisi menggunakan penanda NOR. Oleh karenanya, teknik ini dapat diaplikasikan pada spesies yang berdekatan dengan bawang merah dan komoditas tanaman lainnya.Kata Kunci: AgNO3, kariotipe bawang, kondensasi kromosom, kromosom bawang, NORs
PERANAN CROSS EQUATORIAL NORTHERLY SURGE TERHADAP DINAMIKA ATMOSFER DI WILAYAH INDONESIA BAGIAN BARAT
Authors: Pujiastuti Tyas Tri , Nurjaman Nurjaman
Published: April 2020

IntisariPada saat monsun dingin Asia berlangsung pada Oktober hingga Maret, sebagian wilayah Indonesia mengalami peningkatan curah hujan yang signifikan dibandingkan saat periode April hingga September. Selain dari pengaruh monsun, cuaca di wilayah Indonesia juga dipengaruhi oleh sirkulasi skala global dan regional yang terjadi secara simultan. Hal ini dapat memengaruhi dinamika atmosfer di sebagian wilayah Indonesia. Pada penelitian ini, dikaji aktivitas cross equatorial northerly surge yang terjadi pada skala regional serta dampaknya terhadap dinamika atmosfer di wilayah Indonesia bagian barat khususnya Laut China Selatan bagian selatan hingga Laut Jawa. Hasil penelitian menunjukkan bahwa cross equatorial northerly surge pada tahun 2013 terjadi paling kuat pada saat bersamaan dengan cold surge, dan memengaruhi pola divergensi, transpor kelembapan, dan omega, terutama di wilayah utama pada penelitian ini yaitu perairan Laut China Selatan hingga Laut Jawa, yang berpotensi mendukung terjadinya cuaca buruk di wilayah Bangka Belitung dan Jawa bagian barat.   AbstractDuring the Asia winter monsoon from October to March, parts of the Indonesian region experienced significant rainfall increases compared to the period from April to September. Apart from monsoon influence, the weather in the Indonesian region was also influenced by global and regional scale circulations, which occurred simultaneously. This can affect atmospheric dynamics in parts of the Indonesian region. In this study, the activities of cross-equatorial northerly surge that occurred on a regional scale and its impact on atmospheric dynamics conditions in western Indonesia, especially the southern South China Sea to the Java Sea, are examined. The results showed that the cross-equatorial northerly surge in 2013 occurred most strongly at the same time as cold surge, and influenced divergence, moisture transport, and omega patterns, particularly in the main research areas including South China Sea to the Java Sea, which have the potential to excite severe weather in Bangka Belitung and Western part of Java.
PERBAIKAN ESTIMASI CURAH HUJAN BERBASIS DATA SATELIT DENGAN MEMPERHITUNGKAN FAKTOR PERTUMBUHAN AWAN
Authors: Mulsandi Adi , Mamenun Mamenun , Fitriano Lutfi , Hidayat Rahmat
Published: April 2020

Intisari Permasalahan utama dalam mengestimasi curah hujan menggunakan data satelit adalah kegagalan membedakan antara awan cumuliform dengan awan stratiform dimana dapat menyebabkan nilai estimasi hujan under/overestimate. Dalam penelitian ini teknik estimasi curah hujan berbasis satelit yang digunakan adalah modifikasi Convective Stratiform Technique (CSTm). CSTm memiliki kelemahan ketika harus menghitung sistem awan konveksi dengan inti konveksi yang sangat luas karena akan memiliki nilai slope parameter kecil, sehingga menghasilkan estimasi curah hujan yang underestimate. Dengan melibatkan perhitungan faktor pertumbuhan awan di algoritma CSTm permasalahan tersebut dapat diatasi. Penelitian ini menerapkan algoritma CSTm dan faktor pertumbuhan awan (CSTm+Growth Factor) untuk mengestimasi kejadian hujan lebat yang menyebabkan banjir di Jakarta pada tanggal 24 Januari 2016 yang digunakan juga sebagai studi kasus di proyek pengembangan model NWP di BMKG. Hasil penelitian menunjukan bahwa perlibatan faktor pertumbuhan awan sangat efektif memperbaiki kelemahan teknik CSTm, diperlihatkan dengan peningkatan nilai korelasi dari 0.6 menjadi 0.8 untuk wilayah Kemayoran dan -0.1 menjadi 0.83 untuk wilayah Cengkareng. Secara umum gabungan teknik CSTm dan faktor pertumbuhan awan dapat memperbaiki estimasi nilai intensitas dan fase hujan. Abstract  The main problem in estimating rainfall using satellite data is a failure to distinguish between cumuliform and stratiform clouds, which can cause under/overestimate of rains. In this research, the Modified Convective Stratiform Technique (CSTm) has been used to estimate rainfall based on satellite data. The weakness of the CSTm technique is defined when calculating the convective cloud system within a widely convective point. Cloud convective will have a low value of parameter slope and produce an underestimate of rainfall. This issue can be resolved by calculating the cloud growth factor on CSTm. CSTm algorithm and cloud growth factor (CSTm+Growth Factor) has been applied to this research to estimate heavy rainfall for floods event in Jakarta area on January 24th, 2016. The result showed that the cloud growth factor is very effective in improving the weakness of rainfall estimation using the CSTm technique. Correlation between estimation and observation rainfall has increased from 0,6 to 0,8 on Kemayoran and from -0,1 to 0,83 on Cengkareng. The coupled method of CSTm and cloud growth factor significantly improve in estimating phase and intensity of rainfall.
PEMANFAATAN SKEMA DAYTIME MICROPHYSICS RGB HIMAWARI 8 UNTUK MENDETEKSI AWAN CUMULUS POTENSIAL DALAM KEGIATAN TEKNOLOGI MODIFIKASI CUACA
Authors: Pandjaitan Bony Septian , Rachmawati Asri , Hidayat Rahmat , Wirahma Samba , Vahada Adinda Dara
Published: April 2020

IntisariAwan cumulus potensial, dalam kegiatan Teknologi Modifikasi Cuaca (TMC) merupakan awan target semai untuk menghasilkan hujan. Selama ini, penentuan kemunculan awan cumulus potensial biasanya didasarkan pada pengamatan radar cuaca dan pengamatan kanal tunggal satelit maupun beberapa kombinasi kanal satelit yang terpisah-pisah. Keberadaan Satelit Geostasioner Himawari 8 dengan frekuensi observasi tiap 10 menit dan memiliki banyak kanal panjang gelombang menawarkan potensi baru untuk mengamati dinamika awan. Pada artikel ini, penulis mencoba menggunakan skema daytime microphysics RGB Himawari 8 untuk mendeteksi kemunculan dan perkembangan awan cumulus potensial pada wilayah TMC di Kalimantan Barat pada bulan Agustus 2018. Berdasarkan hasil penelitian, terlihat bahwa terdapat karakter awan cumulus potensial seperti yang ditunjukkan oleh hasil klasifikasi dari skema daytime microphysics RGB Himawari 8 pada rute semai pesawat TMC. Selain itu, selama 4 hari kegiatan TMC, terlihat bahwa skema daytime microphysics RGB Himawari 8 dapat mendeteksi awal kemunculan awan cumulus potensial dengan selang waktu 1 hingga 2 jam lebih awal sebelum pesawat TMC terlihat sampai ke lokasi awan cumulus potensial tersebut. Sehingga, skema daytime microphysics RGB Himawari 8 bisa dicoba sebagai panduan informasi pelengkap data radar cuaca bagi pesawat TMC untuk menentukan lokasi awan cumulus potensial.  AbstractPotential cumulus clouds, in Weather Modification Technology (TMC) activities are seedling cloud targets to produce rain. During this time, the determination of the appearance of a potential cumulus cloud is usually based on weather radar observations and observations of single satellite channels as well as several separate satellite channel combinations. The existence of the Himawari 8 Geostationary Satellite with an observation frequency every 10 minutes and has many wavelength channels offers new potential for observing cloud dynamics. In this paper, the author tried to use the Himawari 8 RGB daytime microphysics scheme to detect the emergence and development of potential cumulus clouds in the TMC region in West Kalimantan in August 2018. Based on the research results, it appears that there are potential cumulus cloud character traits, as shown by the classification results of the scheme daytime microphysics RGB Himawari 8 on the TMC aircraft seedling route. In addition, during the five days of TMC activities, it was seen that the Himawari 8 RGB microphysics daytime scheme could detect the beginning of the appearance of potential cumulus clouds at intervals of 1 to 2 hours before the TMC aircraft was seen up to the location of the potential cumulus clouds. Thus, the Himawari 8 microphysics RGB daytime scheme can be tried as a supplementary information guide on weather radar data for TMC aircraft to determine the location of potential cumulus clouds.
Studi Kemampuan Adsorpsi Ion Logam Cr6+ oleh Tanah Vulkanik “Studi Kasus Wilayah Industri Penyamakan Kulit, Garut”
Authors: Sumawijaya Nyoman , Mulyono Asep , Rusydi Anna Fadliah
Published: April 2020

ABSTRACTThe leather tanning industry in Sukaregang, Garut Regency, produces liquid waste containing Chromium and is discharged directly into the Ciwalen River without a waste treatment process. The content of Cr6+ as metal ions in the waste can also contaminating groundwater. The movement of Cr6+ will pass through the soil media before entering to the groundwater wells. The capability of the soil to adsorb the contaminant will reduce the impact on groundwater. The purpose of this study was to determine the ability of the soil in adsorbing and inhibiting the movement of Cr6+ into groundwater. The study was carried out at Sukaregang, Garut Regency and conducting adsorption experiments with a batch system. The analysis was carried out using the Langmuir and Freundlich isotherm model. The experimental results showed that Cr6+ adsorbed ranged from 38% to 57% of the initial concentration. The results from Langmuir Isotherm were: the distribution coefficient (Kads) was 0.45 L/mg and the maximum adsorption capacity (qm) was 2.44 mg/100g sorbent with R2 = 0.959 and Freundlich Isotherm was: qm was 2,86 mg/100g sorbent and Kads was 0,35 L/mg with R2 = 0,860. This large adsorption capacity is caused by soil texture and soil organic content. The soil in Sukaregang tanning industries has a high adsorption capacity towards Cr6+ contaminants.Keywords: adsorption, chromium, Cr6+, contaminant, volcanic soil, GarutABSTRAKIndustri penyamakan kulit di wilayah Sukaregang, Kabupaten Garut, menghasilkan limbah cair yang mengandung Kromium dan dibuang ke Sungai Ciwalen tanpa proses pengolahan limbah. Kandungan ion logam Cr6+ pada limbah dapat mencemari air tanah. Pergerakan ion logam Cr6+ akan melalui media tanah sebelum memasuki sumur-sumur penduduk. Beberapa jenis tanah mempunyai kemampuan untuk mengadsorpsi ion pencemar sehingga tidak semua limbah yang meresap ke dalam tanah mencemari air tanah. Tujuan dari penelitian ini adalah untuk mengetahui peranan tanah dalam menghambat pergerakan ion logam Cr6+ ke dalam air tanah. Penelitian dilaksanakan dengan pengambilan sampel tanah di daerah Sukaregang, Garut, dan melakukan percobaan adsorpsi dengan sistem batch. Sementara analisis dilakukan dengan menggunakan model isotherm Langmuir dan Freundlich. Hasil percobaan menunjukkan konsentrasi Cr6+ yang teradsorpsi berkisar 38 – 57 % dari konsentrasi awal. Kads sebesar 0,45 L/mg dan qm sebesar 2,44 mg/100g tanah dengan nilai R2 = 0,959 menggunakan isoterm Langmuir dan isoterm Freundlich memberikan nilai qm sebesar 2,86 mg/100 g sorbent dan Kads sebesar 0,35 L/mg dengan R2 = 0,860. Tingginya daya adsorpsi ini disebabkan oleh tekstur tanah dan kandungan bahan organik. Tanah di wilayah penelitian memiliki daya adsorpsi yang besar terhadap kontaminan Cr6+.Kata kunci: adsorpsi, kromium, Cr6+, kontaminan, tanah vulkanik, Garut
Penentuan Metode Pematahan Dormansi Benih Kecipir (Psophocarpus tetragonolobus L.) Aksesi Cilacap
Authors: Melasari Nur , Suharsi Tatiek Kartika , Qadir Abdul
Published: April 2020

Kecipir merupakan tanaman yang mempunyai banyak manfaat dan berpotensi untuk dilestarikan. Karakteristik benih kecipir yang impermeabel terhadap air dan gas merupakan faktor yang diduga menyebabkan kecipir sulit untuk berkecambah. Penelitian ini bertujuan untuk mempelajari efektivitas metode pematahan dormansi dan pengaruhnya terhadap struktur benih kecipir. Penelitian dilaksanakan di Laboratorium Ilmu dan Teknologi Benih IPB dan Laboratorium Silvikultur SEAMEO BIOTROP selama 6 bulan. Metode pematahan dormansi dengan perlakuan larutan asam kuat HNO3 5% selama 10 menit dengan nilai daya berkecambah 93.33% dan keserempakan tumbuh 86.67% merupakan nilai yang nyata lebih baik dibanding kontrol sehingga metode ini dapat meningkatkan persentase daya berkecambah dan keserempakan tumbuh benih kecipir. Perlakuan larutan asam kuat HNO3 10% selama 15 menit dengan nilai indeks vigor 56.67% merupakan perlakuan yang dapat meningkatkan persentase indeks vigor benih kecipir. Perlakuan suhu 50 0C selama 10 menit dengan nilai kecepatan tumbuh 14.79% etmal-1 merupakan perlakuan yang dapat meningkatkan kecepatan tumbuh dan menghasilkan kecambah dengan akar yang lebih panjang dibandingkan kontrol maupun perlakuan lain. Perlakuan amplas tidak dapat meningkatkan viabilitas maupun vigor benih, bahkan menimbulkan pertumbuhan cendawan yang menyebabkan kemunduran benih.
Manajemen Pemanenan Kelapa Sawit (Elaeis guineensis Jacq.) di Divisi 2 Bangun Koling Estate, Kotawaringin Timur, Kalimantan Tengah
Authors: Kurniawan Ilham , Lontoh Adolf Pieter
Published: April 2020

Kegiatan penelitian dilakukan di divisi 2 Bangun Koling Estate yang terletak di Desa Tumbang Koling, Kecamatan Cempaga Hulu, Kabupaten Kotawaringin Timur, Kalimantan Tengah dari bulan Februari hingga Juni 2016. Kegiatan penelitian dilaksanakan untuk meningkatkan pengetahuan, keterampilan kerja, menambah pengalaman serta mempelajari kegiatan budidaya kelapa sawit secara teknis dan manajerial. Pengamatan yang diamati meliputi angka kerapatan panen dan estimasi produksi, kebutuhan tenaga panen, kapasitas panen, alat panen dan alat pelindung diri, mutu buah, transportasi buah, dan kehilangan hasil. Hasil pengamatan yang telah dilakukan menunjukkan bahwa manajemen panen sudah berlangsung secara baik, tetapi perlu ditingkatkan agar didapatkan hasil yang optimal. Evaluasi yang harus dilakukan yaitu hasil taksasi belum menggambarkan hasil realisasi panen, penggunaan alat pelindung diri yang masih minim, kapasitas panen yang masih rendah dan masih terdapatnya losses di lapang.
Efektivitas Metode Praktikum Indikator asam Basa Berbasis Contextual Teaching Learning ( CTL ) terhadap Hasil Belajar Siswa Kelas XI SMA Negeri 7 Pontianak
Authors: Saputra Hary , Kurniati Tuti , Fadhilah Raudhatul
Published: April 2020

This research is motivated by the low learning outcomes of students of class XI IPA of SMA Negeri 7 Pontianak in learning chemistry, especially indicator theory sub material. This study aims to determine the learning outcomes between students who are taught using the Acid Base Indicator Practicum Method Based on Contextual Teaching Learning (CTL) and students who are taught with the Discovery Learning model based on practicum. This study uses Intact Group Comparison Design with research subjects of 15 control class students and 16 experimental class students. Data were collected using direct communication techniques: interview sheets, measurement techniques, and direct observation techniques, observation sheets and data collection tools using learning outcomes tests (pretest and posttest). The results of the average pretest and posttest of the control class were 35.1 and 66.1 respectively, the average pretest and posttest of the experimental class were 36.9 and 74.5. Learning outcomes data using the Mann Whitney U-test obtained learning outcomes with a probability number, i.e. P value (0.644)> α (0.05). This means that there are differences in student learning outcomes between the control class and the experimental class. Thus the acid-base indicator practicum method (CTL) gives the Effect Size obtained a value of 0.78 effectiveness of 75.80%. This means that there are differences in student learning outcomes between the control class and the experimental class. Thus the acid-base indicator practicum method (CTL) gives the Effect Size obtained a value of 0.78 effectiveness of 75.80%. This means that there are differences in student learning outcomes between the control class and the experimental class. Thus the acid-base indicator practicum method (CTL) gives the Effect Size obtained a value of 0.78 effectiveness of 75.80%.