bluuebunny/crossref_metadata_2025 huggingface dataset:
Conduta de graduandos em Odontologia em relação ao uso de pontas diamantadas nas práticas clínicas e seu estado de conservação
Authors: Medeiros Luanna Abílio Diniz Melquiades de , Costa Maria do Desterro Andrêzza Souza , Rolim Ana Karina Almeida , Figueirêdo Ana Beatriz Máximo , Guênes Gymenna Maria Tenório , Penha Elizandra Silva
Published: August 2020

O objetivo do estudo foi conhecer a conduta dos graduandos de Odontologia em relação ao uso de pontas diamantadas e suas condições de conservação. Foram aplicados questionários aos 98 acadêmicos regularmente matriculados nas disciplinas clínicas do curso (7° ao 10° períodos), a fim de avaliar as características sobre uso, armazenamento, esterilização e condições das pontas diamantadas utilizadas na prática clínica. Pontas diamantadas foram recolhidas para análise em microscópio eletrônico de varredura (MEV), onde foram observados aspectos relativos ao seu estado de conservação. Foram realizados cálculos de frequência para análise estatística. Observou-se que 44,9% dos estudantes utilizavam empacotamento individual para proceder a esterilização; 27,6% usavam o instrumento por um período de 1 a 2 anos até o seu descarte e 87,8% usavam o mesmo instrumento de 1 a 2 vezes por semana; 66,3% afirmaram que não utilizavam nas clínicas os mesmos instrumentos empregados em atividades laboratoriais; 73,5% empregavam água, sabão e escova para lavagem e 45,9% utilizavam luva de procedimento, gorro, máscara e jaleco; 51% empregavam seringa de ar para secagem; 39,8% não faziam desinfecção; 100% utilizavam autoclave; 87,8% relataram boas condições de uso; 59,2% já trocaram seus instrumentos e 81,6% concordam em utilizar o próprio instrumento em sua cavidade bucal. Nas imagens do MEV pode-se observar perdas estruturais de diamantes, processo de oxidação do aglutinante e até perda severa de parte ativa dessas pontas diamantadas. Os graduandos apresentaram conduta adequada frente ao armazenamento, utilização e esterilização de suas pontas diamantadas. Entretanto, após análise em MEV as pontas não apresentavam bom estado de conservação.
Machine-learning-assisted fabrication: Bayesian optimization of laser-induced graphene patterning using in-situ Raman analysis
Authors: Wahab Hud , Jain Vivek , Tyrrell Alexander Scott , Seas Michael Alan , Kotthoff Lars , Johnson Patrick A.
Published: August 2020

The control of the physical, chemical, and electronic properties of laser-induced graphene (LIG) is crucial in the fabrication of flexible electronic devices. However, the optimization of LIG production is time-consuming and costly. Here, we demonstrate state-of-the-art automated parameter tuning techniques using Bayesian optimization to advance rapid single-step laser patterning and structuring capabilities with a view to fabricate graphene-based electronic devices. In particular, a large search space of parameters for LIG explored efficiently. As a result, high-quality LIG patterns exhibiting high Raman G/D ratios at least a factor of four larger than those found in the literature were achieved within 50 optimization iterations in which the laser power, irradiation time, pressure and type of gas were optimized. Human-interpretable conclusions may be derived from our machine learning model to aid our understanding of the underlying mechanism for substrate-dependent LIG growth, e.g. high-quality graphene patterns are obtained at low and high gas pressures for quartz and polyimide, respectively. Our Bayesian optimization search method allows for an efficient experimental design that is independent of the experience and skills of individual researchers, while reducing experimental time and cost and accelerating materials research.
Glutamatergic neurotransmission in schizophrenia: a systematic review protocol of 1H-MRS studies throughout phenotypic stages of schizophrenia
Authors: Lopes Jamie , Dean Brian , Carruthers Sean , Rossell Susan
Published: August 2020

Schizophrenia is a significant mental health condition involving the dysregulation of multiple neurological pathways in its pathophysiology. The glutamate hypothesis for schizophrenia suggests a dysfunctional glutamatergic system throughout the varying phenotypic stages of schizophrenia – i.e. first-episode psychosis, chronic schizophrenia, and treatment-resistant schizophrenia. In this systematic review protocol (based on PRSIMA-P guidelines), we outline an approach to explore the relationship between the levels of glutamate, glutamine, and the glutamate-to-glutamine ratio and the varying phenotypic stages of schizophrenia. Furthermore, the protocol proposes to review the empirical magnetic resonance spectroscopy (1H-MRS) literature to better understand the association between these changes in the above clinical subgroups and their neuroanatomical correlates.
Foundations of Morality in Iran
Authors: Atari Mohammad , Graham Jesse , Dehghani Morteza
Published: August 2020

Most moral psychology research has been conducted in Western, Educated, Industrialized, Rich, and Democratic (WEIRD) societies. As such, moral judgment, as a psychological phenomenon, might be known to researchers only by its WEIRD manifestations. Here, we start with evaluating Moral Foundations Theory (MFT) using the Moral Foundations Questionnaire, and follow up by building a bottom-up model of moral values, in Iran, a non-WEIRD, Muslim-majority, understudied cultural setting. In six studies (N = 1,945) we examine the structural validity of the Persian translation of the Moral Foundations Questionnaire, compare moral foundations between Iran and the US, conduct qualitative interviews regarding moral values, expand the nomological network of “Qeirat” as a culture-specific set of moral values, and investigate the pragmatic validity of “Qeirat” in Iranian culture. Our findings suggest an additional moral foundation in Iran, above and beyond the five foundations identified by MFT. Specifically, qualitative studies highlighted the role of “Qeirat” values in Iranian culture, which are comprised of guarding and protectiveness of female kin, romantic partners, broader family, and country. Significant cultural differences in moral values are argued in this work to follow from the psychological systems that, when brought to interact with particular socio-ecological environments, produce different moral structures. This evolutionarily-informed, cross-cultural, mixed-methods research sheds light on moral concerns and their cultural, demographic, and individual-difference correlates in Iran.
VISUALISASI POTENSIAL LISTRIK DI ANTARA DUA PLAT SEJAJAR BERHINGGA DENGAN PROGRAM KOMPUTER BERBASIS MATLAB
Authors: Eviliony Eviliony , Erwin Erwin , Surbakti Antonius
Published: August 2020

The calculation of electric potential between two parallel plates with finite size is difficult work, visualization of the issue comprehensively is needed. In this paper, visualization of electric potential between two parallel plates with finite size has been done by developing a MATLAB based computer program. The electric potential was calculated by solving two dimensional Laplace equation. There are two parts of the program that have been developed, the menu program and the main program. The menu program was provided to store the input data required in the calculation. While, the main program served toperform calculations and visualization of the electric potential. The visualization of the electric potential was shown in the mesh and contour graph. The results showed that the program is applicable for various sizes of plates, and the electric potential in each position can be calculated and visualized. However, the computer programs has some limitations, such as for perfoming calculations of electric potential. For plate width ( ) of  m, distance of plates ( ) of  m, and initial potential ( )of  Volt, the electric potential in coordinate (20,0.5) is not defined (NaN).
PENGARUH KONSENTRASI KOH TERHADAP SIFAT FISIS DAN ELEKTROKIMIA ELEKTRODA KARBON DARI LIMBAH KULIT DURIAN SEBAGAI SEL SUPERKAPASITOR
Authors: Kurniawan Pandi , Taer Erman , Malik Usman , Taslim Rika
Published: August 2020

Activated carbon electrode have been prepare from durian shell focused in KOH concentration variations at chemical activation process. The preparation of carbon electrodes begins with pre-carbonization process, grinding using Hard Grinder and ball milling, after that followed by sieving process with particle size at range of 39 - 52 μm. Chemical activation was performed by using KOH activator agent with concentration variation of 0.5 M, 0.6 M, 0.7 M. Carbon powder are formed to pellet form using Hydraulic Press at a 8 ton compression pressure. The carbonization process is carried out a temperature of 600°C in the N2 gas atmosphere at a temperature of 900°C for 2 hours. The electrodes characterization are performed to determine the physical and electrochemical properties.The physical properties such as density, degree of cristanility, surface morfology was analyzed by calculate the electrode dimension such as, mass, thickness and diameter, X-ray diffraction analysis and Scanning Electron Microscopy Analysis. the electrochemical properties was studied the cell capacitance and the electrode capacitance specific using Cyclic Voltammetry method. the electrode density were decrease with the increasing the KOH concentration. The smallest density has been found at electrode using a KOH concentration of 0.7 M. The XRD test showed a carbon was amorfphuse structure identified by existing two broadening peaks at an angle of 2θ, ie 24.967°, 44.315° and 81.332° which describes the  (002), (100) and (112) planes. Furthermore, samples were analyzed by Scanning Electron Microscopy and X-ray diffraction. The  cyclic voltammetry result, obtained the highest specific capacitance of 89.05 F/g and cell capacitance 24,04 F was found at electrode with a KOH  concentration of 0.7 M. From this research it can be concluded that the KOH optimum concentration was 0.7 M.
PENGARUH AKTIVASI KIMIA DENGAN BANTUAN IRADIASI GELOMBANG MIKRO TERHADAP SIFAT FISIS KARBON AKTIF DARI SEKAM PADI SEBAGAI ADSORBEN
Authors: Kartikasari Nurlisa , Farma Rakhmawati , Awitdrus Awitdrus
Published: August 2020

The percentage of KOH affects the quality of activated carbon. In this research the activated carbon has been made of biomass from rice husk by using the process carbonization, chemical activation using Potassium Hydroxide variated percentage for 5%, 10%, 15% and 20% from the mass of sample and microwave irradiation power by 450 Watt. The surface morphology of activated carbon for the sample KA10 produced the even pores structure and lots of pores more than sample KA5, KA15 and KA20. The analysis results of surface morphology of activated also supported by analysis atomic adsorption spectroscopy (AAS) show that sample KA10 has the highest heavy metal adsorption 92,40% for Ni, 91,31% for Pb and 70,24% for Zn.
ANALISIS NILAI PERCENTAGE DEPTH DOSE(PDD) TERHADAP VARIASI KEDALAMAN TARGET DAN LUAS LAPANGAN PENYINARAN MENGGUNAKAN PESAWAT LINAC-CX
Authors: Milvita Dian , Mahyudin Alimin , Alvionita Vinny
Published: August 2020

Percentage Depth Dose (PDD) value measurement is done by varying the target depth and field size. The study was carried out with variations in target depth of 0 cm to 30 cm with 1 cm intervals and fields size ranging from (5x5) cm2 to (39x39) cm2 with intervals (2x2) cm2. PDD is a comparison of the radiation dose at a depth to the radiation dose at the maximum depth normalized by percentage. This study was also conducted to determine the value of radiation doses received by phantoms from the PDD measurement value. This research used 2 photon energy beam that is 6 MV and 10 MV. This study uses water phantom as a substitute for patients with radiation source technique Source Surface Distance (SSD). PDD measurements were performed using a chamber ionization detector. The results obtained showed that the number of radiation doses received by fantom increased to the maximum depth (zmax). After passing zmaks, the radiation dose received by the phantom has decreased. Likewise along with the increase in the amount of radiation field, the value of radiation doses received by phantoms will also increase.
Instructional Design and Models: ASSURE and Kemp
Authors: Bajracharya Jiwak Raj
Published: August 2020

Instructional Design (ID) is a procedure for developing an educational or training programme, curricula, or courses sequentially and authentically (Branch & Merrill, 2011). This procedure enables instructors to create instructions, which involves the “systematic planning of instruction” (Smith & Ragan, 2005, p. 8), ranging from instructional analysis to evaluation (Mager, 1984). Thus, ID can be referred to as a “systematic and reflective process of translating principles of learning and instruction into plans for instructional materials, activities, information resources, and evaluation” (Smith & Ragan, 2005, p. 4). As such, taken as a framework, ID provides the process to create instructions based on the necessity of a teaching and learning environment. Thus, ID can be defined as a process to develop directions and specifications using learning and instructional theory to ensure the quality of instruction.
Agricultura Criminal: um estudo exploratório
Authors: Freitas Mara Luiza Gonçalves
Published: August 2020

O submundo da agricultura existe. Neste artigo, discutem-se as infrações penais no contexto agrícola, doravante denominado na literatura por Barclay (2001) como Agricultura Criminal. De caráter exploratório, o estudo discute indicadores afeitos ao problema do crime rural, concentrando seu olhar na questão do narcotráfico que empresta sua complexa dinâmica para viabilizar a construção conceitual da Cadeia Produtiva Agrocriminal (AGROCRIM). O primeiro modelo estático da AGROCRIM é detalhado ao longo do texto, através da aplicações de conceitos de governança de cadeias produtivas agroindustriais, com forte poder explicativo necessário à compreensão de inúmeras outras cadeias de crimes organizadas horizontalmente que se integram verticalmente ao narcotráfico, graças ao sofisticado sistema de governança realizado pelas organizações criminosas. Introduz-se no texto os conceitos de crimes-fim e crimes-meio, classificados em diretos e indiretos, necessários para a proposição dinâmica do modelo da AGROCRIM, que se remete à estrutura do DNA, cujo objetivo é reforçar a complexidade e coesão da governança. O trabalho ainda avança ao apresentar um estudo bibliométrico relacionado à Agricultura Criminal.
O Emprego das Forças Policiais como Instância Mediadora de Conflitos
Authors: Silva Luciano Loiola da
Published: August 2020

O presente artigo aborda a possibilidade de emprego das forças policiais como instância mediadora de conflitos. A finalidade deste trabalho centra-se no interesse em demonstrar a necessidade e a viabilidade jurídica do uso da mediação policial como uma metodologia de emprego de policiamento adaptada ao modelo consensual de justiça cível e criminal, voltada à prevenção criminal e à promoção de uma cultura de paz nas comunidades atendidas pela polícia. A pesquisa aborda os benefícios que podem ser experimentados pela sociedade e pelas forças policiais a partir do emprego da mediação como política de segurança pública. Defende-se, neste trabalho, a transformação de um modelo de atuação policial autoritário, verticalizado e reativo, para um modelo proativo, horizontalizado e preventivo, centrado em uma concepção de prevenção criminal alargada, baseada na gestão dos conflitos que se apresentam nas comunidades, no uso adequado da discricionariedade administrativa e no uso progressivo da força e do poder de polícia. Consta ainda deste estudo uma análise das questões jurídicas que podem ser suscitadas quando do emprego da mediação policial; uma descrição dos princípios, da metodologia e das regras que devem ser observadas visando à implantação do parâmetro de atuação policialora proposto; e, também, um levantamento dos problemas e dos conflitos tratados cotidianamente pelas forças policiais hábeis a serem submetidos à mediação policial, assim como os obstáculos e os desafios que envolvem a sua implantação.
FEATURES OF REGULATORY MECHANISMS FOR CAPITAL INTEGRATION IN THE CORPORATE SECTOR (ON THE EXAMPLE OF POLAND)
Authors: Rykova N. V.
Published: August 2020

The development of the corporate sector in Poland has become an important element in the formation of a new economic environment and the transformation of social relations. The article analyses the regulatory mechanism in the corporate sector of Poland, which concerns, in particular, the mechanisms of integration and capital development, with the help of the content analysis method. Considerable attention is paid to updating Polish legislation in accordance with the requirements of the European Union (EU). The author carried out a retrospective analysis of the process of the development of market economy in Poland and the place of privatization in it. The study describes significance of privatization processes in Poland for new progressive tendencies of development of public relations. The article analyses the problems that still remain relevant for the development of the corporate sector in Poland. The regulatory features of the activity of transnational companies in modern Poland and their significance for the economy are studied. The author notes the role of Poland’s membership in the EU to ensure further development of the market economy, the development of the corporate sector in it on the basis of capital integration. It is concluded about a significant capitalization of Polish companies. Access of Polish companies to capital is a necessary condition for dynamic development, as small Polish businesses are unable to accumulate investment funds on their own and incur high loan costs.
A intertextualidade entre “já sei namorar” e “geração tribalista”
Authors: Da Silva Santos Jaiana
Published: August 2020

Durante muito tempo, a sociedade conheceu um modelo de relacionamento: aquele pautado nas convenções sociais, no qual os pais escolhiam pretendentes para suas filhas, de acordo com o status e tradição da família do rapaz. Com o passar dos anos, novos tipos de relações são presenciados. Não existe mais tanto rigor na escolha dos companheiros e os pais estão longe de ter sob controle seus filhos, que estão mais independentes que nunca. Como ponto de partida, tem-se o artigo “Geração tribalista”, de Arnaldo Jabor e a música “Jásei namorar”, dos Tribalistas para, a partir desses gêneros, abordar aspectos relacionados à linguística textual e à análise do discurso.Sendo assim, este artigo foi resultado do trabalho de conclusão de curso da especialização em Estudos Linguístico realizado na Universidade Estadual de Feira de Santana (UEFS) e teve como objetivo principal compreender a relação entre texto e discurso, mostrando de que forma linguagem e prática social se relacionam. Como resultados esperados este artigo almeja despertar no leitor o desejo de ampliar sua visão crítica em relação aos diversos gêneros textuais que circulam na sociedade, extrapolando a análise do que está exposto no plano meramente linguístico, indo em busca da compreensão das condições de produções em que se deu a construção de um dado texto, seu discurso, prática discursiva e social.
Vida e obra de Alberto Osório de Castro em Timor
Authors: Paulino Vicente
Published: August 2020

Neste artigo pretendemos explorar descritivamente a presença do jurista e poeta Alberto Osório de Castro em Timor, terra longínqua do extremo oriente. Num primeiro momento, apresentamos a sua infância, passagem pela Coimbra e Mangualde e respectiva participação nas revistas literárias como correspondente e autor, no qual publicou vários estudos literários, poemas, crónicas de história e de viagem. Num segundo momento, focamo-nos na sua estadia em Timor como juiz, bem como observamos algumas das principais obras associadas à ilha de Timor e sua gente com culturas diferenciadas, nomeadamente as Flores de Coral e A Ilha Verde e Vermelha de Timor, resultante de uma aproximação a estas obras mediada pela perspectiva dos estudos em literatura e apreciação exótica da paisagem orientalista no mundo timorense que se norteia pelas cores da gente.
O efeito Pingo Doce
Authors: Antunes David
Published: August 2020

Neste artigo, experimenta-se a possibilidade de leitura de um evento do quotidiano, uma afluência massiva ao supermercado, em virtude de uma promoção especial, ser entendido como evento performativo de significado relevante e, por consequência, discutem-se os limites da arte, em geral, e da performance e do teatro, em particular. No exercício desta leitura, consideram-se fatores habituais na caracterização do evento que se descreve e discute, a saber: os agentes e/ou atores, a ação, o contexto, os espetadores, a participação, as emoções, a crítica, as implicações políticas e éticas, etc.
A formação artística em Cabo Verde desenvolvida pela Mindelo - Escola Internacional de Arte
Authors: Perdigão Pereira Denise , Guimarães de Medina Maria Teresa , Alves Martins Aracy
Published: August 2020

Introdução: O artigo discute a formação artística em Cabo Verde desenvolvida pela Mindelo_Escola Internacional de Arte, M_EIA, criada em 2005, tendo a pesquisa aplicada realizada pela escola como núcleo de discussão. A principal estratégia metodológica consistiu na análise do discurso dos atores inseridos no contexto da instituição e em seu entorno. Além disso, o uso de fontes diversas, tais como o projeto pedagógico da escola, programas de ensino, notas de campo etc., implicou em uma análise em profundidade do contexto em questão, característica dos estudos de caso. Como referencial teórico central foram utilizados Atkinson (2008) e Mouffe (2014). O estudo concluiu que a M_EIA desempenha papel de relevo em seu país, na medida em que a instituição está implicada com o seu desenvolvimento não apenas no âmbito da arte e da cultura, mas também nos campos do social e do econômico. Por outro lado, foram constatadas algumas fragilidades no plano operativo, tais como a tendência de concentração do poder na tomada de decisões quanto à escola e os rumos de seus projetos, nas mãos de seus principais dirigentes, aspecto que revela a necessidade de aprimoramento das práticas democráticas na escola.
Pengembangan media pembelajaran fisika berbasis android di SMA Negeri 3 Ngabang
Authors: Wulandari Nyemas
Published: August 2020

Â Penelitian ini bertujuan untuk menghasilkan media pembelajaran fisika berbasis android. Penelitian ini merupakan penelitian dan pengembangan (R&D) yang mengacu pada model ADDIE yang terdiri dari lima tahap yaitu analisis (analyze), desain (design), pengembangan (development), implementasi (implementation), dan evaluasi (evaluation). Dari hasil validasi ahli media didapatkan persentase sebesar 87,42% dengan kriteria sangat baik, hasil validasi ahli materi didapatkan persentase sebesar 76,67%, dan hasil validasi ahli desain didapatkan persentase sebesar 80%. Hasil respon siswa uji coba didapat rata-rata uji coba kelompok one to one sebesar 85,83 % dengan kriteriaÂ  positif, uji coba kelompok sedang rata-rata sebesar 89,38% dengan kriteria positif, dan uji coba kelompok besar dengan rata-rata sebesar 95,21% dengan kriteria positif. Dari hasil validasi dan uji coba produk menunjukan bahwa media pembelajaran fisika berbasis android layak untuk digunakan dalam pembelajaran fisika.Â
Exploring the Mediating Role of Job Stress in Relationship Between Leadership Styles and Employees Commitment
Authors: Muhammad Saeed , Khan Muhammad Saqib
Published: August 2020

This study is an attempt to examine whether leadership styles (transformational & transactional) have any effect on the commitment of employees, working in PESCO. The current study also examined the facilitating role of job stress in connection amid employees’ commitment and leadership styles that whether the job stress affects this relationship or otherwise. A stratified random sampling technique was used to select the respondent of the research study. The primary data were collected by using questionnaire. The significance level (p < .05) was used to accept and reject the hypotheses. The results acclaim that the development in the perceived level of leadership style used by the leaders can affect the commitment level among the employees. The leadership style of the leaders is expected to mark not only the commitment level of the workforces but also the performance of the organization. Similarly, job stress “fully mediated the relationships between leadership” styles and employees’ performance.
Russian Arms Industry During the Period of Military Reforms of the 60s–70s of the XIX Century
Authors: Benda V.N.
Published: August 2020

The article states that the Crimean War of 1853–1856 showed the imperfection of the Russian army’s weapon. The growth of weapons in European countries in the post-war period urged Russia to eliminate the backlog of the Russian army in the field of weapons and to carry out fundamental reform in this field. The article considers the issues related to military reforms in Russia in the second half of the 19th century, which covered all the main areas of military construction such as recruitment and organization of troops, principles of troop management, rearmament of infantry, artillery and cavalry, a system of combat training of troops and officers. The study focuses on the fact that one of the most important and difficult problem of military reform was the rearmament of the army. The scientific novelty lies in the interdisciplinary consideration of issues related to the results of the activities of the weapons industry in manufacturing new samples of small arms and their supply to the army with the involvement of the works of domestic historians. It is concluded that although during the period of military reforms of the 1860–1870s significant success was achieved in the development of the arms industry; its production capacities were not enough to fully satisfy the army’s needs for weapons.
Keywords: XIX century, Crimean war, Russian army, reforms, weapons industry, new samples of small arms, production, rearmament of the army.
Lexical Means of Nominating Emotions in French
Authors: Gurskaya L.N.
Published: August 2020

The article studied the principles of the lexical means systematizing in language, systematizing of the nominations of emotions on the material in French as well as analyzing the scientific literature, which made it possible to formulate two new approaches to the inventory of lexical means of nominating emotions: conceptual-categorical and oppositional-semantic. The article examines the degree of development of the scientific problem of the correlation of language and emotions, highlights the key elements of the metalanguage of describing lexical means of nominating emotions, compares the conceptual content of lexical means of nominating emotions with universal evaluative contrasts adopted in linguistics and psychology. Universal and specific means of the emotional sphere of the French language were also identified that determine their assessment, the attitude to the world through deep penetration into the structure of emotions.
UJI ANTIOKSIDAN EKSTRAK HEKSANA, ETIL ASETAT, ETANOL, METANOL 80% DAN AIR DAUN KELOR (Moringa oleifera, Lamk)
Authors: Kiswandono Agung Abadi , Maslahat Mamay
Published: August 2020

Antioxidant Test of  Hexane, Etil Asetat, Ethanol, Methanol 80% and   Water Extract in Moringa oleifera           Antioxidant is a substance that can protect a materials from its destruction. Sources of antioxidant could be from plants. Alkaloid compounds in the Moringa oleifera leaves have  potential  antioxidant source. This research aimed  to examine antioxidant potential from Moringa oleifera leaves extract of hexane, ethyl acetate, methanol 80% and water .   The extraction methodes was meseration, and antioxidant test used the DPPH free radical scavenging effect. The  result showed that extract ethanol had the best potential antioxidant with the value of 118.19 µg/mL and R2 was 99.9%, from hexanes was 692.39 µg/mL (R2=99.9%), in ethyl acetate was 247.5 µg/mL (R2=99.9%), in methanol 80% was  121.79 µg/mL (R2= 0.998) and in water extract 189.21 µg/mL (R2=99.8%). Antioxidant standart as kuersetin that gave value of 15.84 µg/mL (R2 = 99.9%).Keywords : Bioactives compound, moringa oleifera,  antioxidant ABSTRAK          Antioksidan merupakan substansi yang dapat mencegah atau memperlambat kerusakan suatu zat. Sumber antioksidan dapat diperoleh dari suatu tumbuhan. Senyawa alkaloid yang terdapat pada daun kelor berpotensi sebagai sumber antioksidan. Penelitian ini  bertujuan menguji antioksidan ekstrak heksana, etil asetat, etanol, metanol 80% dan air pada daun kelor (Moringa oleifera, Lamk). Penelitian dilakukan dengan menggunakan metode maserasi dan uji antioksidan menggunakan metode ”DPPH free radical scavenging effect”. Hasil uji antioksidan terbaik terdapat pada ekstrak etanol, yaitu sebesar 118.19 µg/mL dengan harga R2 sebesar 99.9%, sedangkan pelarut yang lain, yaitu pelarut heksana sebesar 692.39 µg/mL (R2=99.9%), etil asetat 247.5 µg/mL (R2=99.9%), metanol 80% 121.79 µg/mL (R2= 0.998) dan air 189.21 µg/mL (R2=99.8%), sebagai pembanding antioksidan digunakan kuersetin, yaitu 15.84 µg/mL (R2= 99.9%).Kata kunci : Senyawa bioaktif, moringa oleifera,  antioksidan
OPTIMALISASI KADAR ABU DALAM PEMBUATAN MINYAK JARAK PAGAR TERVULKANISASI
Authors: Puspitasari Santi , Handayani Hani , Melinda R. Siti Noviani , Syamsu Yoharmus
Published: August 2020

Optimization of Ash Content on the Synthesize of Vulcanized Jarak Pagar (Jatropha curcas) Oil         Developments in the preparation of rubber compound formulations should be followed by a rubber compounder, especially in modifying the formula. Rubber compound composed of rubber as an elastomer and its chemical. Each ingredient has a specific function and influence to the properties of rubber articles. The research studied the formulation of vulcanized oil of Jatropha curcas to obtain the best quality in terms of ash content. The experiment begins with the characterization of Jatropha curcas oil and testing of ash content of each component in the formulation of vulcanized Jatropha curcas oil. The results was used as the basis for formulation of vulcanized Jatropha curcas oil components. Vulcanized Jatropha curcas oil was synthesized at the laboratory scale (100 g oil / batch) at 140OC temperature, agitation speed of 100 rpm, and the variation of dose Na2CO3 and ZnO (0.25; 0.50, and 0.75 pho). Vulcanized Jatropha curcas oil obtained were analyzed for visualization of physical and chemical properties. The experimental results showed that the lowest of ash content of vulcanized Jatropha curcas oil was of 1.24% obtained from the reaction by the addition of 0,25 pho of Na2CO3 and 0,50 pho of ZnO. This dose was defined as the optimal dose because it gived the ash content that meets the requirements of commercial vulcanized oil (max 1.5%).Keywords: Rubber compound, elastomer, Jatropha curcas oil ABSTRAK        Perkembangan teknik formulasi dalam penyusunan kompon karet harus dapat diikuti oleh rubber compounder terutama dalam memodifikasi formula tersebut. Kompon karet tersusun atas karet sebagai elastomer dan bahan kimianya. Setiap bahan kimia karet memiliki fungsi dan pengaruh yang spesifik terhadap sifat barang jadi karet. Pada penelitian ini dipelajari formulasi bahan dalam pembuatan minyak tervulkanisasi agar diperoleh mutu terbaik ditinjau dari segi kadar abu. Percobaan diawali dengan karakterisasi minyak jarak pagar dan pengujian kadar abu setiap komponen dalam formulasi minyak jarak pagar tervulkanisasi. Hasilnya digunakan sebagai dasar penyusunan formulasi komponen minyak jarak pagar tervulkanisasi. Minyak jarak pagar tervulkanisasi dibuat pada skala laboratorium (100 g minyak/batch) pada suhu 140oC, kecepatan pengadukan 100 rpm, dan variasi dosis Na2CO3 serta ZnO (0,25; 0,50; dan 0,75 bsm). Minyak jarak pagar yang diperoleh dianalisis visualisasi fisik dan sifat kimianya. Hasil percobaan menunjukkan bahwa kadar abu minyak jarak pagar tervulaknisasi terendah sebesar 1,24% diperoleh dari reaksi dengan penambahan 0,25 bsm Na2CO3 dan 0,50 bsm ZnO. Dosis ini ditetapkan sebagai dosis optimal karena memberikan kadar abu yang memenuhi persyaratan minyak nabati tervulkanisasi komersial (maks 1,5%).Kata kunci: Kompon karet, elastomer, minyak jarak pagar
IDENTIFIKASI SENYAWA KIMIA PADA SIMPLISIA DAUN SIRSAK (Annona muricata Linn.)
Authors: Maslahat Mamay , Syawaalz Amry , Restianingsih Rahayu
Published: August 2020

Identification
The Impacts of the PBT TOEFL-based Progressive and Summative Learning Measurement in a Higher Educational Institution
Authors: Caromawati, S.S., M.A Corry
Published: August 2020

AbstractIt is commonly found that testing policy affects learning and teaching process occurring in educational institutions. This case study investigated the impacts of employing the PBT TOEFL test as the progressive and summative tests in a higher educational institution in one of the biggest towns in Indonesia. The data was collected through observation, field notes and personal interviews with six English language lecturers to get in-depth information based on their experience. The data from the interview was later transcribed. The whole data was analyzed qualitatively. The results showed that on the macro level, the test indeed affected the policy makers’ decisions that demanded the lecturers to teach to the test and expected the students to study language outside the classroom. Their decisions inevitably also affected the individuals in the micro level. It is shown that even though the testing policy contributed positive impacts, it dominantly affected language and teaching process negatively. The perceived positive impacts included the practicality of administering the test and language explicit knowledge input to the students. The perceived negative impacts were categorized into two groups: (1) the negative attitude of the lecturers toward language teaching and the students’ negative attitude toward learning; (2) the distorted focus of language teaching and learning. These results advocate for an evaluation towards the policy for a better language learning and teaching.Keywords: second language test, testing impacts, washback, testing policy
Language use in the classroom: Identity in classroom discourse
Authors: Muhlisin Muhlisin
Published: August 2020

AbstractThis study concerned group of Indonesian EFL learners’ perceptions regarding the use of Indonesian (L1) and English language (L2) by their teachers in the classroom. In particular, the study aimed to unravel how these learners perceived the use of their L1 and L2 during the course of English instruction in the classroom and how their perceptions might have been shaped by different aspects of “identity construction” to which they were oriented. Data were gathered through administering a questionnaire to one hundred seventy-three adult Indonesian EFL learners. Analysis of the learners’ responses suggested that they maintained different perceptions with regard to the use of their L1 and L2 and that their perceptions may be subsumed into two broad categories, each of which reflects the differences in their perceptions. Factors that might have affected the learners’ perceptions were then critically discussed in the light of identity theory in the context of L2 pedagogy. In particular, the theory suggests that different aspects of identity construction to which learners are oriented affect their perceptions of the use of theirL1 and L2 in the classroom. Further, these different aspects of identity construction may also affect how learners are likely to respond to the use of an L1 and L2 in the classroom (and beyond).Keywords: English as a foreign language (EFL), language use, identity theory in L2 pedagogy
Students’ Activity Involvement for Speaking Ability Improvement
Authors: Mufaridah Fitrotul
Published: August 2020

To make students’ ideas become real, it needs act that can make them bring themselves to explore what is in their mind. The action done by students in the classroom would encourage them to be able to be creative in speaking class. The creativity should be facilitated by the teacher by providing more rooms for the students to involve much in the classroom activities. It is more meaningful for the teacher to design the classroom activities by involving students’ participation. The design should facilitate both teacher and students to practice the teaching and learning activities creatively, so the class would be more interesting and more authentic. The students’ involvement can also empower the student-teacher relationship and bridge them to minimize gap. In the process of having speaking classroom activities, the teacher can learn more on how to listen to students’ ideas and how to appreciate them respectfully to their creativity. The teachers can build the students’ creativity and guide them how to implement it well for students’ learning experience. In another side, the students are invited to explore their smart ideas in developing learning experience which is leading them to do creative and meaningful learning activities. They come to class not only as the passive participants of the learning activities but also as the active participants in proposing and acting their ideas in speaking class. It is really challenging involvement for the students. It brings them to have bigger responsibility in doing learning process. So, the students’ activity involvement are experienced them to enrich their creativity and to enhance their speaking ability.   Keywords: classroom activity design, learning experience, meaningful learning, challenging involvement, creativity enrichment.
An Investigation of Student Teachers' Anxiety Related to the Teaching Practicum
Authors: Charisma Dila , Nurmalasari Puteri
Published: August 2020

This study aims at investigating the student teachers’ anxiety related to the teaching practicum as well as the factors that contribute anxiety during teaching practicum, and exploring the student teachers’ strategies in overcoming their anxiety during teaching practicum. Qualitative research with a case study approach employed in this study. STKIP Invada Cirebon was chosen as the site and English student teachers were the participants of this study who did teaching practicum at SMK RISE Kota Cirebon, while the data were collected through interview and weekly journal. This study discover that students teachers’ anxiety related to the teaching is situation-specific anxiety, and the factors contribute anxiety can be grouped into six categories: being not familiar with the situations in the classroom, being observed by mentor or supervisor, incompetence in teaching, not match with expectations, less English proficiency, and classroom management. So that this study also identifies six categories of coping strategies employed by student teachers: adaptation, preparation, build a good relationship with the mentor and the students, self confidence, positive thinking, and keep calm and enjoy it. The findings of this study give insight for supervisor university, mentor, and student teachers about anxiety may arise during teaching practicum. Key words: Anxiety; Student Teachers’ Anxiety; Teaching Practicum; Cause of Anxiety; Strategies in Overcoming Anxiety.
EFEKTIFITAS TERAPI AKUPRESUR TERHADAP DERAJAT NEUROPATI PADA PASIEN DIABETES MELITUS
Authors: Surya Defrima Oka , Desnita Ria
Published: August 2020

Pendahuluan : Neuropati diabetik merupakan komplikasi yang sering terjadi pada kaki Diabetisi. Terapi akupresur bermanfaat dalam menstimulasi aliran energi dalam tubuh sehingga memperbaiki aliran sirkulasi tubuh.Tujuan : Penelitian ini bertujuan untuk mengetahui efektifitas akupresur terhadap derajat neuropati diabetik pada pasien Diabetes Melitus.Metode : Desain penelitian ini adalah quasi eksperimen dengan pendekatan pre-posttest design without control grup pada 17 responden. Terapi akupresur diberikan selama 7 sesi, 2 hari sekali selama 10 menit. Derajat neuropati dinilai menggunakan Michigan Neuropathy Instrument Scale. Untuk melihat efek akupresur terhadap derajat neuropati pada pasien Diabetes Melitus dilakukan uji bivariat paired t test dengan tingkat kepercayaan yang digunakan adalah 95%Hasil Penelitian : Hasil penelitian menunjukkan rerata derajat neuropati pada pasien Diabetes Melitus sebelum dilakukan intervensi akupresur adalah 5,82 dan sesudah intervensi 3,68. Hasil analisis bivariat menunjukkan akupresur efektif dalam menurunkan derajat neuropati pada pasien Diabetes Melitus (p=0,001).Kesimpulan : Terapi akupresur efektif dalam menurunkan derajat neuropati pada pasien Diabetes Melitus. Akupresur dapat dijadikan salah satu alternatif terapi yang dapat diterapkan perawat di masyarakat untuk mencegah terjadinya komplikasi lanjut pada Diabetisi sebagai kelompok rentan.
Mobile Learning Readiness Among Students Of Maldives Higher Education Institutions
Authors: Mumthaz Fathimath
Published: August 2020

Mobile learning and connecting development and trends are widely discussed globally. Literature evidences exist confirming mobile learning and its impact on higher education. Mobile learning opportunities can be one option for higher education institutions to reach a dispersed population of the Maldives. Although readiness of mobile learning has been analysed in several counties and contexts, this contributes as the first
research on this subject in the Maldives. Therefore this article is intended to find out students' readiness for mobile learning (mLearning) in the higher education institutes of Maldives. Basic readiness and mobile usage readiness of students from three different higher education institutions contributed to the research. A total of 343 institutional students enrolled in flexible delivery programs responded to the online questionnaire survey. Considering the level of programs, cluster sampling technique was used in shaping
the sample of the research. Data was analysed using descriptive statistics and SPSS to interpret the findings on student readiness for mobile learning. The findings indicated that the students were confident in using mobile and other mobile devices in daily activities. Also, findings indicated that majority of students were confident with the basic and advanced mobile skills of mobile learning.
Using LMS Analytics to Optimise Learning Design from the Activity Theory Perspective
Authors: Leow Fui-Theng
Published: August 2020

E-learning are widely adopted in todays' university classrooms to supplement teaching
approaches. Moodle is the most popular learning management system (LMS) that builds with the features of recording the learners' data and activities. Leveraging learners' data has become a trend in searching for informed guidance and actionable insights to optimise the learning design. Literature shows that the highest levels of participation do not correlate with the best academic results, and the most engaged students are likely the weakest students who try to improve their performance.This dataset contains the information about 659 students, the logs of their interactions, and the summary of site entries over one academic semester.
Exploring the Use of Immersive Technology in Education to Bring Abstract Theoretical Concepts to Life
Authors: Michael Ekerin Oluseye , Yeen-Ju Heidi Tan , Tse Kian Neo
Published: August 2020

Over the years educators have adopted a variety of technologies in a bid to improve student engagement,
interest and understanding of abstract topics taught in the classroom. There has been an increasing interest
in immersive technology such as Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR).
The ability of VR to bring ideas to life in three dimensional spaces in a way that is easy for students to
understand the subject matter makes it one of the important tools available today for education. A key
feature of VR is the ability to provide multi-sensory visuals and virtual interaction to students wearing a
Head Mounted Display thus providing students better learning experience and connection to the subject
matter. Virtual Reality has been used for training purposes in the health sector, military, workplace training,
gamification and exploration of sites and countless others. With the potential benefits of virtual technology
in visualizing abstract concepts in a realistic virtual world, this paper presents a plan to study the use of
situated cognition theory as a learning framework to develop an immersive VR application that would be
used to train and prepare students studying Telecommunications Engineering for the workplace. This paper
presents a review of literature in the area of Virtual Reality in education, offers insight into the motivation
behind this research and the planned methodology in carrying out the research.
Sense Of Multikulturalisme: Potensi Integrasi Dalam Kelompok Teater Pelajar SMA Di Kota Solo
Authors: Ansari Isa , Dipoyono Achmad
Published: August 2020

In general, this study departs from a large scheme of research on Sense of Multiculturalism initiated by the Center for Theater Studies and Social Integration. This is a basic research to explore the potencies that exists among adolescents, both related to the conflict as well as efforts to integrate in high school theater groups. Problems of this research include; first, what potencies that can lead them into conflict areas? What potencies that develops in youth theater groups that can anticipate and strengthen the social integration? Data collection is done by interview, observation, and documentation. The results of this study indicate that the potencies that directs group members into conflict is due to the impartiality experienced by students participating in theater extracurricular activities, both from the school as well as from their family. But their potencies in integration is strongerthan the potencies in conflict, namely independence, maturity, togetherness, cooperation, and kinship among members of the student theater group. Keywords: integration, conflict, students theater
REINTERPRETASI SIMBOL BATIK DEMAK
Authors: Afrizal Afrizal
Published: August 2020

AbstractThis article wants to reinterpret the symbol of batik Demak that has been lost for hundreds of years. Demak as the first Islamic empire, in its time, becomes the center of Islamic Javanese culture and a cultural figure with the various cultural products. One of the cultural products in Demak is batik. The context of this study views Batik Demak as a cultural form, namely artifacts that contain a discourse of self-representation found by ideographic aspects of the initiator and the culture that produce to it. This discourse is reflected in the form or figure of the object as well as the implicit meaning. Batik Demak is considered to be a cultural heritage in Demak since hundreds of years ago. It had, once, disappeared then in 2006 it was reappeared. This must cut the strings of history about the meaning and function of Batik Demak in ancient times. Batik Demak tends to present when each region in the territory of Indonesia, especially Central Java is promoting batik with regional motifs. The reinterpretation of symbols that emerge seems to be a strategy of branding or imaging an area. The meaning of the symbol of batik does not really represent the pattern of life of Demak community as manifested in the five typical motives of Demak.Keywords: Batik Demak, Reinterpretation, Symbols