bluuebunny/crossref_metadata_2025 huggingface dataset:
PERCEIVED EASE OF USE DAN PERCEIVED USEFULNESS TERHADAP E-COMMERCE INTENTION MELALUI APLIKASI ONLINE SHOP PADA MAHASISWA DI SURABAYA
Authors: Suryawirawan Okto Aditya
Published: August 2019

Pertumbuhan e-commerce yang pesat dalam kurun waktu 4 tahun terakhir menjadi peluang bisnis yang sangat potensial di Indonesia. Peluang tersebut dapat menjadi alternatif solusi bagi pengangguran di Indonesia yang meningkat pada tahun 2017. Namun melihat bahwa industri digital tergolong industri yang padat modal, perlu kemudian kiranya dikaji kembali arah pemanfaatan peluang tersebut. Fokus dari penciptaan lapangan kerja sebaiknya tidak pada penciptaaan platform-platform e-commerce yang semakin banyak, namun pada bagaimana calon pelaku bisnis dan pelaku bisnis yang sudah ada dapat memanfaatkan platform-platform e- commerce tersebut. Penelitian ini bertujuan untuk menguji pengaruh perceived ease of use danperceived usefulness terhadap e-commerce intention melalui aplikasi online shop di Surabaya. Sampel yang digunakan dalam penelitian ini adalah mahasiswa. Jenis penelitian ini adalah kuantitatif dengan menggunakan kuisioner sebagai instrumen. Hubungan antar variabelnya kemudian diuji menggunakan partial least square dengan software smartPLS. Hasil penelitian ini menunjukkan bahwa terdapat pengaruh positif signifikan perceived ease of use terhadap e- commerce intention dan pengaruh positif signifikan perceived ease of use terhadap perceived usefulness. Pengaruh perceived usefulness terhadap e-commerce intention ditemukan positif namun tidak signifikan.
The Performance Of English Speaking Skill Used By The Receptionist of Purna Wisata Tour And Travel
Authors: Halijah Sitti , Bastian Dewi
Published: August 2019

The reseach objectives are to know whats ymbols are performed in Lariangi dance and what meaning are conveyed in the symbols performed in Lariangi dance. The research used descriptive qualitative method to take information. The writer obsereved the house in Liya village and took some informations from them and interviewed and documented by using recorded and camera. This research also took the datum from some books, articles, internet which associat with the symbols in Lariangi dance in Wakatobi Southeast Sulawesi. The research resulted in the part of symbols in Lariangi dance start from dress, accessories, movement of the dance and the songs of Lariangi dance. The result of the research was consisted  in four part. First, the symbols found in dress there are six namely Kombo Monihi, Kombo Meha, Punto/Wuray Nibelo Biru, Laka/Wuray Meha, Kambero, and Lenso/Saputangan symbolyzes sweat rag of King Buton. The second, there are eight symbols and their meaning found in accessories, namely Panto and Pintoru, Hepupu/Konde, Kamba Konde, Toboy Kamba, Hebindu/Sangi-Sangi, Kalo, Naga,  Sekori Keponto Posusu symbolyzes degrees nobility. The third, there are four symbols found in movement of Lariangi dance namely, Hematu kepooli le..le, Pajogi/Nyibing/Ngifi,  Nabu/Tau,  and Lariangi symbolyzes Lighting. The last is symbols found in song of Lariangi dance there are nine songs namely Mangu-Mangu, Ole-Ole,  Doumaraia, Denda Aule, Sailila, Waindi-Indi, Rongande, Jojongana, and Salatu symbolyzes as thankful to Allah SWT.
Physiologic constraints of using exosomes in vivo as systemic delivery vehicles
Authors: Lee Dong Soo , Suh MInseok , Kang Seo Young , Hwang Do Won
Published: August 2019

Systemic delivery of exosomes meets hurdles which had not been elucidated using live molecular imaging for their biodistribution. Production and uptake of endogenous exosomes are expected to be nonspecific and specific, respectively, where external stimuli of production of exosomes and their quantitative degree of productions are not understood. Despite this lack of understanding of basic physiology of in vivo behavior of exosomes including their possible paracrine or endocrine actions, many engineering efforts are taken to develop therapeutic vehicles. Especially, the fraction of exosomes’ taking the routes of waste disposal and exerting target actions are not characterized after systemic administration. Here, we reviewed the literature about in vivo distribution and disposal/excretion of exogenous or endogenous exosomes and, from these limited resources of knowledge currently available, summarized the knowledge and the uncertainties of exosomes on physiologic standpoints. An eloquent example of the investigations to understand the roles and confounders of exosomes’ action in the brain was highlighted with emphasis on the recent discovery of brain lymphatics and hypothesis of glymphatic/lymphatic clearance pathways in diseases as well as in physiologic processes. The possibility of delivering therapeutic exosomes through the systemic circulation, across blood-brain barriers and finally to target cells such as microglia, astrocytes and/or neurons is a good testbed in which the investigators can formulate problems to solve for both understanding (science) and application (engineering).
Políticas de medicamentos, assistência farmacêutica e vigilância sanitária no Brasil: análise da atuação do estado no período de 2014 a 2018
Authors: Souza Mariluce Karla Bomfim de , Lima Yara Oyram Ramos , Araújo Patricia Sodré , Costa Ediná Alves , Souza Gisélia Santana , Souto Ana Cristina
Published: August 2019

Resumo: O artigo trata da análise das políticas de medicamentos, assistência farmacêutica e vigilância sanitária, que constituem um dos eixos temáticos do Observatório de Análise Política em Saúde (OAPS), espaço caracterizado por uma rede de pesquisadores do Instituto de Saúde Coletiva da Universidade Federal da Bahia (ISC/UFBA) e outros centros de pesquisa. Assim, questiona-se como o Estado tem atuado e/ou se posicionado no que tange às políticas de Medicamentos e de Assistência Farmacêutica no período de 2014 à 2018? Tem por objetivo: apresentar os resultados da análise da atuação do Estado brasileiro em torno das referidas políticas, no período de 2014 a 2018, tendo em vista o uso de estratégias de pesquisa utilizadas a partir de notícias de sites institucionais. Os resultados apresentam-se em quatro categorias definidas pelo OAPS: implementação, financiamento, participação social e resultados da política. Em que pesem os avanços, o subfinanciamento público da saúde e os conflitos de interesse, entre outros elementos, oferecem ameaças, requerendo ação contínua do Estado e dos atores interessados na saúde como um direito social que inclui medicamentos, regulação e vigilância sanitária.Palavras-chave: Política de Saúde; Medicamento; Assistência Farmacêutica; Vigilância Sanitária; Direito à Saúde; Participação Social. Medication policy, pharmaceutical assistance and sanitary surveillance in Brazil: analysis of the state’s performance in the period 2014 to 2018Abstract: The article deals with the analysis of drug policy, pharmaceutical services policy and health surveillance policy, which are one of the thematic axes of the Observatory of Political Analysis in Health (OAPS), a space characterized by a network of researchers from the Institute of Collective Health of the Federal University of Bahia (ISC/UFBA) and other research centers. Thus, it is questioned how the State has acted and/or positioned itself regarding the policies of Medications and Pharmaceutical Services in the period from 2014 to 2018? The purpose of this study is to present the results of the analysis of the Brazilian State's actions around these policies in the period from 2014 to 2018, in view of the use of research strategies used from news from institutional sites. The results are presented in four categories defined by the OAPS: implementation, financing, social participation and policy results. Regarding advances, public underfunding of health and conflicts of interest, among other elements, offer threats, requiring continuous action by the State and stakeholders interested in health as a social right that includes medicines, regulation an health surveillance.Keywords: Health Politics; Drug; Pharmaceutical Assistance; Health Surveillance; Right to Health; Social Participation.
Diseño de un prototipo de calentador solar con materiales reciclados
Authors: Ávila Víctor , Chong Rosa , Terreo Suyen , Marín Nacarí
Published: August 2019

El presente artículo describe el diseño de un prototipo de  calentador de agua hecho con materiales reciclados y que aprovecha la radiación térmica. Se presentan los métodos y materiales utilizados para el desarrollo del prototipo del calentador solar, así como su  funcionamiento teórico.  En el diseño se considera la orientación que éste debe llevar para su máximo aprovechamiento. En las pruebas realizadas, se confirma que los cuerpos negros absorben la radiación solar, y el efecto invernadero que provoca el vidrio.
Problemas en la red de distribución eléctrica en el distrito de Changuinola, provincia de Bocas del Toro
Authors: Guerra Diocelina , Saldaña Joustin , Rivera José , González Joannys , Valdés Vanessa
Published: August 2019

La provincia de Bocas del Toro cuenta con dos hidroeléctricas que generan energía eléctrica para toda la población panameña. Sin embargo, en esta provincia se presentan constantes apagones, por lo cual, se ha desarrollado esta investigación con el objetivo de identificar los problemas en la red de distribución eléctrica en el distrito de Changuinola, provincia de Bocas del Toro. Este estudio tiene un enfoque cuantitativo, porque utiliza la recolección de datos con base en la medición numérica y el análisis estadístico. El diseño de la investigación es no experimental, de tipo prospectivo y transversal. Se aplicó un cuestionario de cinco preguntas a una muestra de 380 usuarios, con un nivel de confianza del 95% y un margen de error del 5%. Los datos fueron analizados obteniendo los siguientes resultados: El 42% de los usuarios de energía eléctrica afirmaron que sufren de apagones eléctricos cinco veces por mes, y que debido a los apagones las pérdidas materiales andan alrededor del 26%. El 26% de los usuarios indican que los cables son antiguos, pudiendo ser la causa de los apagones eléctricos.  El 26% de los usuarios piensan que los apagones son causados por eventos naturales, como la caída de árboles, fuertes vientos y lluvias, pero son datos que no pueden asegurar.
Panorama general de la gerencia de proyectos: una mirada en Panamá
Authors: Lore Kaly , Boosquez Patricio , Batista Libia
Published: August 2019

La certificación a la gestión de proyectos representa para la organización y para los profesionales, una herramienta que agrega valor para producir valor. Este artículo presenta un enfoque general de la gestión de proyectos y su campo de interés está centrado en la importancia de una gestión de proyectos certificada, como garante del éxito en el impacto durante y después del proyecto, permitiendo que las organizaciones se encuentren en la vanguardia y generando satisfacción al dueño, al ejecutante y al cliente. Se hace una revisión que se desarrolla de la siguiente manera: 3.Gestión de proyectos. Una historia en evolución, 4. Estándares en la gestión de proyectos. Certificaciones y 5.Certificaciones a la gestión de proyectos en Panamá. Se hace especial énfasis a los aspectos positivos que conlleva una eficiente y eficaz gestión de proyectos, desde el impacto económico y social. Además, se presentan estadísticas sobre el tema en Panamá.
Pengaruh Pengelolaan Keuangan Daerah dan Sistem Pengendalian Internal Pemerintah terhadap Kinerja Pemerintah Daerah Kabupaten Bogor
Authors: Asrudin Fiqri Asep , Sari Imelda
Published: August 2019

The objectives of the research are to find out empirical evidence of the the effect of Local Financial Management and Internal Control System Government (SPIP) on Local Government Performance. This research was conducted at the Regional Device Work Unit (SKPD) in Bogor Regency, is West Bogor District. Each District of West Bogor taken three respondents namely the government, economic and administrative sections. The data used in this study is primary data obtained by distributing questionnaires directly to 41 respondents by using purposive sampling technique. Data analysis technique used in this research is Multiple Regression (Multiple Regression). The results of this study indicate that the Regional Financial Management and Government Internal Control System have a positive effect on the Performance of Local Government.
Pengaruh Tarif Pajak, Ketetapan Pengalokasian Pajak dan Keadilan Pajak terhadap Tax Evasion oleh Wajib Pajak Orang Pribadi
Authors: Syafi’ah Rahayu Ima , Madjid Suhirman
Published: August 2019

One of the income of the country is tax. Tax used to fund welfare and prosperity life masyarakat. The fundamental characteristics tax is force and systems impressed difficult and intractable resulting in the tax disobedient in paying its tax. In general taxpayers seek to make can pay decline possible amout tax or him as much as possible avoid. There are two ways to minimise taxes, the first with tax avoidance and tax evasion. This study aims todo analyze factors affecting tax evasion. As for those factors is the influence tax rate, the accuracy of the allocation of tax and tax equality. Population in this research is taxpayers individual listed on KPP Pratama Bekasi Utara. Sample in this research determined based on a method of convenience of sampling, data collected  by the division of the questionnaire. The method of analysis lab data used is linear regression multiple. Based on the analysis shows taht tax rate have a positive influence and significant impact on tax evasion, the accuracy of the allocation of tax have a negative influence and a significant impact on tax evasion, the tax equality have a negative influence and significant impact on tax evasion.
SISTEM INFORMASI APLIKASI PELAYANAN PANTI SOSIAL
Authors: Pakpahan Roida , Fitriani Yuni , Mahdiyyah Mahdiyyah
Published: August 2019

Social institutions function to provide skills training to women who were previously commercial sex workers to have skills so they are able to find decent jobs or able to build independent businesses. At present the Harapan Mulia Social Institution has used an information system to manage the data of the assisted citizens but the use of its information system still has several disadvantages including; the program does not have a data search facility that has been fostered so that the search for data of the assisted citizens will take a long time, the certificate of the assisted citizens is not systemic so that the printed certificate will take a long time because the staff will manually retrieve the data again. This study aims to design information systems using software development using the waterfall method by adding data searches on applications and storing certificates in the system to speed up the work process of employees.
KLASIFIKASI KERUSAKAN DENGAN JARINGAN SYARAF BACKPROPAGATION PADA PERMUKAAN SOLAR PANEL
Authors: Wiliani Ninuk , Sani Asrul , Andyanto Achmad Taufiq
Published: August 2019

Solar panel terdiri dari beberapa sel yang dapat merubah cahaya menjadi listrik. Kerusakan pada permukaan solar panel sering terjadi di akibatkan banyak hal. Ketidaktahuan dari petugas menyebabkan kerusakan tidak dapat diatasi lebih awal sehingga menyebabkan kejadian yang lebih parah. Penelitian yang dilakukan adalah mengidentifikasi awal dari beberapa kerusakan yang sering terjadi. Dengan menggunakan metode stastistik yang di aplikasikan ke dalam Jaringan Syaraf Tiruan yang menggunakan Mean, variance, dan skewness untuk mengetahui nilai akurasi dari pengujian sample. Subjek yang digunakan adalah image yang terdiri dari gambar gambar panel yang rusak. Kerusakan yang diidentifikasi dalam penelitian ini adalah Kerusakan akibat goresan, noda dan pecah. Hasil dari penelitian ini mempunyai nilai akurasi sebesar 90%. Sehingga diharapkan dapat dideteksi lebih awal untuk melihat kejadian kerusakan dari solar panel.
Hubungan Latar Belakang Ekonomi Keluarga dan Dukungan Orang Tua terhadap Prestasi Belajar Matematika
Authors: Kewa Maria Geronsia Azi , Wijayanti Rina
Published: August 2019

Mathematics learning achievement is the learning outcome/ability achieved by students during and after completing mathematics lessons where the results are expressed in the form of numbers or other symbols. Learning achievement is influenced by several factors including family economic background and parental support. This research is quantitative research, the study population was all VII grade students of Boawae 1 Junior High School totaling 101 students. Sampling using simple random sampling, where researchers about 24% of the population to be selected as samples, so that the study sample amounted to 24 students. The stages of this research are data collection using a questionnaire then analyzing the data using Pearson product moment correlation. The data collection process uses questionnaire techniques. Research data were analyzed using Pearson product moment correlation. Based on this study, it can be concluded that There is an insignificant relationship between the family's economic background on the mathematics learning achievement because the value of rcount is 0.242 smaller rtable at a significant level of 5% that is 0.404 and there is a relationship between parental support for mathematics learning achievement because the rcount of 0.747 is greater than rtable at a significant level of 5% which is 0.404 and there is a jointrelationship between the family's economic background and parental support for mathematics learning achievement because the Fcount value of 14.701 is greater than Ftable at the 5% significance level of 3.47.
Analisis Proses Metakognisi dalam Pemecahan Masalah Matematika Ditinjau dari Gaya Kognitif
Authors: Sili Isabela Freningsi Kidi , Argarini Dian Fitri
Published: August 2019

The purpose of this research was to determine the metacognition process of students in Baiturrohmah Malang Islamic Junior High School Class VIII which have a field dependent (FD) and field independent (FI) cognitive style in solving mathematical problems in solid geomethry topic. This type of research is qualitative descriptive research with purposive sampling method. The subject were 1 FD and 1 FI. The subjects were selected by GEFT test. The instrumentsused in this research are broblem solving test and interview guidelines. The resultsare (1) the process of metacognition of FD subject in problemsolving, on awareness indicator, it can be seen that subject was able to mention what was ask of the question completely, subject was mistaken in writing down what was known. On regulating indicator the subject has been able to determine the plan and carry out the plan correctly. The indicator evaluating the subject has been able to re-examine the answers and give the conclusion, (2) the process of metacognition of FI subject in problem solving. In the awareness indicator, it can be seen that subject has been able to mention what is known and asked about the problem well. Regulating indicatorthe subject was able to arrange the plan and carry out the plan correctly. evaluating indicator the subject has not been able to re-examine the answer that have been done but have not arrived at conclusions.
ANALISIS KESULITAN SISWA DALAM MEMPELAJARI FAKTOR PERKALIAN, KOEFISIEN, KONSTANTA, SUKU, DAN SUKU SEJENIS
Authors: Ambarawati Mika
Published: August 2019

The purpose of this study is to describe students' learning difficulties in studying variables, constants, coefficients, the factors, types of parts, similar tribes, and the tribes do not like. This research is a descriptive study with qualitative approach. This research is a descriptive study with qualitative approach. The subject of this study consisted of three students of class VII A SMP Muhammadiyah 1 Kartasura. The instrument used was a booklet multiplication factor, coefficients, constants, parts, and similar parts and pieces of interviews. Data were analyzed using the concept of Miles and Huberman. The results showed: (1) students have difficulties in understanding the concepts and definitions of the types of parts, multiplication factors, the tribes of similar or not similar tribes, tribal, constants, variables, and the coefficient of the algebra. (2) students have difficulty in classifying the algebra by type tribe. (3) students have difficulty in distinguishing factor of the algebra and multiplication factor numbers. (4) students have difficulty in differentiating the tribes of similar or not similar and why. (5) students' difficulties in classifying the tribe, constants, variables, and the coefficient of the algebra.
ANALISIS KESALAHAN MAHASISWA DALAM MEMECAHKAN MASALAH MATEMATIKA BERDASARKAN ANALISIS NEWMAN DITINJAU DARI GENDER
Authors: Agustin Ririn Dwi
Published: August 2019

Difficulties in learning are caused by student study programs in mathematics education to solve problems in solving mathematics. The mistake was made by both male and female students. In the course, algebraic structure is one of the material that requires the right procedure in its completion. This research includes descriptive analysis with qualitative data analysis. Data collection was carried out by test and interview methods conducted twice, namely TPM 1 and TPM 2. Subjects were considered as 2 students from 35 students of class 2016, consisting of one male student and one female student. The student has high mathematical skills. Each research subject was interviewed regarding the results of his work at TPM 1. To find the credibility of the data, the second test was conducted, which means that this study uses time triangulation. Furthermore, the data were analyzed to determine the types of student errors according to Newman's analysis. Based on the results of the study, data obtained that all research subjects did not make mistakes, errors, errors and answer errors. However, all research subjects made a mistake in the process at TPM 1 or at TPM 2. The male student subject made a mistake because he did not know the right way to use the existing formula. Meanwhile, female student subjects made mistakes because they did not understand the concept of exponents and chaos amid mathematical operations.
ANALISIS KESALAHAN MAHASISWA DALAM MENYELESAIKAN PERSAMAAN KUADRAT PADA MATA KULIAH ALJABAR ELEMENTER
Authors: Patricia Firda Alfiana
Published: August 2019

This study aims to describe student errors in solving quadratic equations in elementary algebra courses. Mistakes can teach students and lecturers to reflect. This research was conducted on students of 2018-B Mathematics Education program IKIP Budi Utomo Malang. Errors found include mistakes in facts, namely errors in understanding what is known in the problem. The principle error is that the formula used is not in accordance with the questions asked.
UPAYA PENINGKATAN PENALARAN MATEMATIS MAHASISWA UNIVERSITAS TRIBHUWANA TUNGGADEWI MELALUI PENDEKATAN CONTEXTUAL TEACHING AND LEARNING (CTL)
Authors: Arifendi Rio Febrianto , Setiawan Rudy
Published: August 2019

This study aims to describe the learning steps by using the Contextual Teaching Learning (CTL) approach that can improve students 'mathematical reasoning, so that students' mathematical reasoning problems are well resolved in the learning process. Classroom Action Research). The research design consists of several actions, one action is called a cycle. The activities of each cycle consist of four main activities, namely planning (planning), action (action), observation (observation), and reflection (reflection). The CTL strategy used in this study includes: Relating, Cooperating, Experiencing, Appliying, Transfering. The results of the study show that: (1) Implementation of learning with an approach consists of: Students observe problems, write problems, solve problems, and students discuss problems; (2) Mathematical reasoning of students who study using CTL has increased; (3) Learning with CTL is favored by students.
Aplicación de materiales etnomatemáticos para la enseñanza y aprendizaje en estudiantes universitarios
Authors: Meza-Paucar Toño , Bao-Condor Carlos L.
Published: August 2019

La investigación tuvo como objetivo diseñar materiales educativos según el etno de su contexto, para aplicar en la enseñanza y aprendizaje de la matemática, dónde este método debe ser combinado con otros métodos activos de acuerdo a la naturaleza, para tal efecto el diseño fue cuasi experimental con la aplicación de una pre prueba, proceso y post prueba; conformado por los estudiantes del III y V ciclo de la Escuela Profesional de Educación Primaria de la Universidad Nacional Hermilio Valdizán - Obas, matriculados en el año académico 2017, en el primer grupo experimental se utilizó los materiales etnomatemáticos diseñados en la investigación, mientras en el segundo grupo control, el enfoque convencional dictaminados por el Ministerio de Educación. Para ello se realizó un diagnóstico en las instituciones públicas del distrito de Obas, donde se aplicó, procesó, verificó y analizó los instrumentos pedagógicos y así obtener los siguientes resultados en la post prueba, la mediana o el 50 % de los estudiantes del grupo experimental obtuvieron notas superiores a 14, paralelamente el 50 % de los estudiantes del grupo de control obtuvieron notas inferiores a 14 y el otro 50 % obtuvieron notas superiores a 11. Por lo tanto, se concluye que influye positivamente en la enseñanza y aprendizaje de la matemática, en los estudiantes.
Significado del aprendizaje–enseñanza de la matemática en contextos lingüísticos del quechua y citadinos
Authors: Holguin-Alvarez Jhon A. , Villa-Morocho César , Montalvo-Callirgos Mariela , Villena-Guerreo Mirella , Carrasco-Nuñez Yubel , Espinola-Ayala Lupe
Published: August 2019

El aprendizaje de la matemática y su enseñanza son complejas para el estudiante y docente peruano, sobre todo, en contextos marcados por bajas condiciones económicas, en los cuales el quechua ya se ha olvidado por su escasa práctica. Como propósito, planteamos caracterizar los significados del aprendizaje y la enseñanza de las matemáticas en quechua y español, nos basamos en el enfoque cualitativo – narrativo, asumimos una muestra de 10 estudiantes y dos profesores quechua hablantes y castellano hablantes de Huancavelica y distrito de Comas (Lima). Utilizamos dos instrumentos para la medición del aprendizaje de los estudiantes, y una encuesta de abordaje pedagógico. El estudio permitió concluir que los estudiantes de zonas andinas presentan más dificultades que el estudiante citadino en cuanto a la numeración y resolución de problemas. Los docentes utilizan estrategias directivas, caracterizadas por métodos tradicionales de construcción del aprendizaje; no obstante, se planifican siguiendo plantillas de sesión de aprendizaje exigidas por el Ministerio de Educación.
Studi Awal Implementasi Internet Of Things Pada Bidang Pendidikan
Authors: Bakri Muhammad Amin
Published: August 2019

Relasi antara teknologi dan pendidikan sudah berlangsung cukup lama. Sejak e-learning diperkenalkan, pemanfaatan teknologi informasi dan komunikasi untuk pembelajaran semakin berkembang. Dengan adanya ide pengembangan internet of things (IoT), pemanfatan teknologi untuk pembelajaran pun semakin menunjukkan kemajuan yang signifikan. Tulisan ini dimaksudkan untuk mengeksplorasi beberapa kemungkinan implementasi IoT dalam dunia pendidikan dan pembelajaran. Studi awal ini dilakukan dengan bantuan beberapa literatur terkait yang telah dilakukan oleh beberapa ahli. Pembahasan dimulai dari konsep, gagasan, sampai dengan implementasi yang pernah dilakukan di lapangan. Kata-kata Kunci: Internet of Things, electronic learning, mobile learning, ubiquitous learning
Construction D-optimal designs of experiments for linear multiple regression with heteroscedastic observations
Authors: Kirlitsa Valery P.
Published: August 2019

In article the problem of construction exact D-optimal designs of experiments for linear multiple regression in a case when variance of errors of observations depend on a point in which is made is investigated. Class of functions which describe change variance of heteroscedastic observations is defined for which it is possible construct D-optimal continues designs of experiments. For linear multiple regression with three factors it is constructed five different types of D-optimal continues designs of experiments with heteroscedastic observations. For each of these types the own class of functions describing change variance of observations is defined.
CROSSING POINT IN THE MANAGEMENT ALGORITHM OF ACUTE LOWER GASTROINTESTINAL BLEEDING – CASE REPORTS AND LITERATURE REVIEW
Authors: Andrei G. N. , Dumitriu B. , Gulie L. , Bulca F. , Beuran M.
Published: August 2019

Acute  lower  gastrointestinal  bleeding  is  a significant  problem, a  rare  and  life  threatening  situation,  that has  a  mortality  rate  situated  between  2  and  4% (1).  According to recent studies up to 15%  of them present as  massive  bleeding  and  5%  require  surgery (2). Acute lower  gastrointestinal  bleeding  can  be  divided  according  to  their  location  in  the  small  or  large  bowel. The  small  intestine  is  less interested  and is known to be  the  commonest  cause  of  obscure  bleeding. About 5%  of  total  lower  gastrointestinal  bleeding  comes from the small intestine (3). When conservative medical treatment associated with  interventional endoscopy can not handle the bleeding, endovascular therapy  can be salutary. Also  in  some  rare  cases  of  acute  lower  gastrointestinal   bleeding  with  hemodynamic  instability  the  last  therapeutic  resource  remains  surgery.  Thus, we will present  two  cases  of  acute  lower  gastrointestinal  bleeding  which  were  managed  different, we will then summarize the  different  variants  of  available  treatment  and  finally, in  the  conclusions, we  will underscore  the  most  important  steps  of  the  management algorithm and highlight the crossing point   in  acute  lower  gastrointestinal  bleeding.
GALLSTONE DISEASE WITH UNCONJUGATED HYPERBILIRUBINEMIA: CLINICAL APPROACH TO GILBERT’S SYNDROME
Authors: Kumar Suneed , Jha Sneha , Pandey Anshuman , Madhavan Shibumon M , Kumar Dinesh , Chauhan Smita , Masood Shakeel
Published: August 2019

Gallstones are the commonest ailment affecting the hepato-biliary system. Associated jaundice is usually direct, commonly due to biliary obstructive lesions. Unconjugated hyperbilirubinemia with cholelithiasis is commonly seen with hemolytic disease. In the absence of hemolysis or systemic causes, congenital causes prevail, commonest of which is Gilbert’ Syndrome. This study aims to ascertain a clinical approach to the patient of gallstones with Gilbert’s syndrome. This is retrospective study of 58 patients with gallstone associated unconjugated hyperbilirubinemia, who underwent surgery over a two-year period. Patients underwent repeat blood investigations and ultrasound to confirm the diagnosis. Obstructive biliary pathology was ruled out by MRCP images; EUS added if indicated. The remaining patients underwent genetic test for Gilbert’s syndrome – namely UGT1A1 gene assessment by PCR. All patients underwent laparoscopic cholecystectomy as routine; with addition of intra-operative liver biopsy. Sixteen of the 58 patients were short-listed to be high risk factors for harboring Gilbert’s syndrome after ruling out other systemic causes. On gene study, 14 patients tested positive for UGT1A1 gene, hence Gilbert’s syndrome. The other two were kept on follow up for jaundice recurrence in future. The management algorithm is depicted as flowchart. Gilbert’s syndrome can be identified in select “high-risk” individuals presenting with gallstone disease. Genetic testing is gold standard, and helps in effective management and better patient counselling.
The Knowledge and Attitude About Diarrhea of Mothers of Students Attending an Elementary School in a Suburban Area in Istanbul
Authors: KESKİN Nese , SURMEN Aysen , SAVE Dilsad , HİDİROGLU Seyhan , KARAVUS Melda
Published: August 2019

Objective: Diarrhea is one of the main cause of morbidity and mortality among children age under 5 years in Turkey though diarrheal disease control program has been performing and death ratio due to diarrheal disease under 5 years has been decreasing year by year in Turkey. This study is undertaken to evaluate knowledge, attitude and practice of mothers about childhood diarrheal diseases in a suburban area.Methods: This descriptive study was carried out in a primary school in a suburban area of İstanbul. One hundred and forty four mothers of children included accepted in the study with response rate of 85%. A questionnaire form was applied for data collection. Epi-Info programme was used for statistical analysis. In addition to the descriptive statistical methods, for the comparison of qualitative data a chi-square test was used .Results: In our study, the percentage of mothers who could define diarrhea correctly was 40%. Abdominal pain and watery defecation were the main signs which the mothers understand their children have diarrhea. Most of the mothers indicated that microbes as the cause of diarrhea. One of every two mothers stated that they would take their children to the doctor as they notice their child has diarrhea. Among the homemade treatments we asked, Potatoes cooked in boiling water and banana were the most frequent answers. Only one of mothers mentioned about using drugs at home for diarrhea and percentage of hearing about ORS was 21.5%. Eleven percent of mothers mentioned they believed to decrease liquid intake would be an effective practice in the treatment of diarrhea. Education level was very influential about knowledge and attitude about diarrheal disease. Conclusion: This study reveals the importance of continuous health education of mothers as well as the need for raising their status especially schooling in communities. Circulating of correct information is also important as well as educating population.
Induced Systemic Resistance (ISR) in Arabidopsis thaliana by Bacillus amyloliquefaciens and Trichoderma harzianum Used as Seed Treatments
Authors: Ilham Barakat , Noureddine Chtaina , Philippe Grappin , Mohammed El Guilli , Brahim Ezzahiri , Sophie Aligon , Martine Neveu , Muriel Marchi
Published: August 2019

The Trichoderma fungal species and the bacteria Bacillus species were described as inducers of plant systemic resistance in relation to their antagonistic activity. The objective of this study was to evaluate the effect of selected strains of Bacillus amyloliquefaciens (I3) and Trichoderma harzianum (A) on inducing systemic resistance in Arabidopsis thaliana as a model for plant molecular genetics. The microorganisms were identified and were confirmed for their antagonistic potential in vitro and in vivo in previous studies. In order to explore this mechanism, two mutants of A. thaliana carrying a PR1 promoter (a conventional marker of salicylic acid (SA) pathway) and LOX2 promoter (a marker triggering jasmonic acid (JA) pathway activation) were analyzed after inoculating antagonists. Transgenic reporter line analysis demonstrated that B. amyloliquefaciens I3 and T. harzianum A induce A. thaliana defense pathways by activating SA and JA at a high level compared to lines treated with chemical elicitors of references (acibenzolar-S-methyl (Bion 50 WG (water-dispersible granule)), SA, and methyl jasmonate). The efficacy of B. amyloliquefaciens I3 and T. harzianum A in inducing the defense mechanism in A. thaliana was demonstrated in this study.
The Beneficial Regulation of Extracellular Matrix and Heat Shock Proteins, and the Inhibition of Cellular Oxidative Stress Effects and Inflammatory Cytokines by 1α, 25 dihydroxyvitaminD3 in Non-Irradiated and Ultraviolet Radiated Dermal Fibroblasts
Authors: Philips Neena , Ding Xinxing , Kandalai Pranathi , Marte Ilonka , Krawczyk Hunter , Richardson Richard
Published: August 2019

Intrinsic skin aging and photoaging, from exposure to ultraviolet (UV) radiation, are associated with altered regulation of genes associated with the extracellular matrix (ECM) and inflammation, as well as cellular damage from oxidative stress. The regulatory properties of 1α, 25dihydroxyvitamin D3 (vitamin D) include endocrine, ECM regulation, cell differentiation, photoprotection, and anti-inflammation. The goal of this research was to identify the beneficial effects of vitamin D in preventing intrinsic skin aging and photoaging, through its direct effects as well as its effects on the ECM, associated heat shock proteins (HSP-47, and -70), cellular oxidative stress effects, and inflammatory cytokines [interleukin (IL)-1 and IL-8] in non-irradiated, UVA-radiated, UVB-radiated dermal fibroblasts. With regard to the ECM, vitamin D stimulated type I collagen and inhibited cellular elastase activity in non-irradiated fibroblasts; and stimulated type I collagen and HSP-47, and inhibited elastin expression and elastase activity in UVA-radiated dermal fibroblasts. With regard to cellular protection, vitamin D inhibited oxidative damage to DNA, RNA, and lipids in non-irradiated, UVA-radiated and UVB-radiated fibroblasts, and, in addition, increased cell viability of UVB-radiated cells. With regard to anti-inflammation, vitamin D inhibited expression of Il-1 and IL-8 in UVA-radiated fibroblasts, and stimulated HSP-70 in UVA-radiated and UVB-radiated fibroblasts. Overall, vitamin D is predominantly beneficial in preventing UVA-radiation induced photoaging through the differential regulation of the ECM, HSPs, and inflammatory cytokines, and protective effects on the cellular biomolecules. It is also beneficial in preventing UVB-radiation associated photoaging through the stimulation of cell viability and HSP-70, and the inhibition of cellular oxidative damage, and in preventing intrinsic aging through the stimulation of type I collagen and inhibition of cellular oxidative damage.
Knowledge and Attitude of Midwifery Students on Oral Health Care
Authors: Seyedzadeh Sabounchi Sepideh , Seyedzadeh Sabounchi Shabnam , Safari Maryam
Published: August 2019

Midwifery students can have an important role in transferring oral health care information to expecting mothers. The aim of this study was to assess the effect of an educational intervention on knowledge and attitudes of midwifery students on oral health in pregnancy. Study population consisted of 60 midwifery students in a Midwifery School in Iran who were randomly allocated into case and control groups. Self-administered questionnaires were distributed before, immediately after the intervention and also three months later. The validity and reliability of the questionnaire was confirmed at the beginning. Mean total pre-test knowledge scores from total 10 in the interventional and control groups were 4.63 ± 0.25 (Standard Error, SE) and 4.79 ± 0.31 (SE) respectively. After three months scores reached to 8.87 ± 0.15 (SE) in the interventional and 5.57 ± 0.29 (SE) in the control groups. Mean attitude pre-test scores in the interventional group was 27.23 ± 0.75 (SE) and after the intervention reached to 31.13 ± 0.25 (SE). Lecture-based educational intervention improved the knowledge and attitudes of midwifery students on oral health care in pregnancy. Incorporating courses on oral health in pregnancy into the curricula of midwifery programs can be effective in promoting oral health care in pregnant women.
The Uncertain Bidder Pays Principle and Its Implementation in a Simple Integrated Portfolio-Bidding Energy-Reserve Market Model
Authors: Csercsik Dávid , Sleisz Ádám , Sőrés Péter Márk
Published: August 2019

One reason for the allocation of reserves in electricity markets is the uncertainty of demand and supply. If the bias of the generation portfolio shifts from controllable generators to renewable sources with significantly higher uncertainty, it is natural to assume that more reserve has to be allocated. The price of reserve allocation in European models is dominantly paid by the independent system operator in the form of long-term paid reserve capacities and reserve demand bids submitted to various reserve markets. However, if we consider a scenario where the significant part of generation is allocated in day-ahead auctions, the power mix is not known in advance, so the required reserves can not be efficiently curtailed for the ratio of renewables. In the current paper we analyze an integrated European-type, portfolio-bidding energy-reserve market model, which aims to (at least partially) put the burden of reserve allocation costs to the uncertain energy bidders who are partially responsible for the amount of reserves needed. The proposed method in addition proposes a more dynamic and adaptive reserve curtailment method compared to the current practice, while it is formulated in a computationally efficient way.
CO2 Refrigeration and Heat Pump Systems—A Comprehensive Review
Authors: Bruno Frank , Belusko Martin , Halawa Edward
Published: August 2019

An increased awareness of the impacts of synthetic refrigerants on the environment has prompted the refrigeration industry and researchers worldwide to seek better alternatives in terms of technical, economic and environmental performance. CO2 refrigerant, also known as R744, has re-emerged as a potential alternative to existing refrigerants with its zero ozone depletion potential (ODP) and impressively low global warming potential (GWP). A refrigeration system utilising this refrigerant, however, suffers performance degradation when it operates in warm or hot climatic regions due to its inevitable operation in the supercritical region. In addition, the CO2 refrigerant properties necessitate the need for components designed to withstand very high operating pressures. These challenges have not been let unnoticed; related industries and researchers are actively involved in research and development of various components and systems which in turn encourages increased applications of these systems. In this paper, a comprehensive review of CO2 refrigeration systems and the state of the art of the technology and its applications in various industries is presented. In particular, the paper reviews recent research and developments on various aspects of CO2 systems including cycle modifications, exergy analysis of the systems, system modelling, transcritical operation consideration and various existing and potential applications.
Multi-Scale CFD Modeling of Plate Heat Exchangers Including Offset-Strip Fins and Dimple-Type Turbulators for Automotive Applications
Authors: Della Torre Augusto , Montenegro Gianluca , Onorati Angelo , Khadilkar Sumit , Icarelli Roberto
Published: August 2019

Plate heat exchangers including offset-strip fins or dimple-type turbulators have a wide application in the automotive field as oil coolers for internal combustion engines and transmissions. Their optimization is a complex task since it requires targeting different objectives: High compactness, low pressure drop and high heat-transfer efficiency. In this context, the availability of accurate Computational Fluid Dynamics (CFD) simulation models plays an important role during the design phase. In this work, the development of a computational framework for the CFD simulation of compact oil-to-liquid heat exchangers, including offset-strip fins and dimples, is presented. The paper addresses the modeling problem at different scales, ranging from the characteristic size of the turbulator geometry (typically µm–mm) to the full scale of the overall device (typically cm–dm). The simulation framework is based on multi-scale concept, which applies: (a) Detailed simulations for the characterization of the micro-scale properties of the turbulator, (b) an upscaling approach to derive suitable macro-scale models for the turbulators and (c) full-scale simulations of the entire cooler, including the porous models derived for the smaller scales. The model is validated comparing with experimental data under different operating conditions. Then, it is adopted to investigate the details of the fluid dynamics and heat-transfer process, providing guidelines for the optimization of the device.
Assessment of the Impact of Stagnation Temperatures in Receiver Prototypes of C-PVT Collectors
Authors: Gomes João
Published: August 2019

Concentrating Photovoltaic Thermal (C-PVT) solar collectors produce both thermal and electric power from the same area while concentrating sunlight. This paper studies a C-PVT design where strings of series-connected solar cells are encapsulated with silicone in an aluminium receiver, inside of which the heat transfer fluid flows, and presents an evaluation on structural integrity and performance, after reaching stagnation temperatures. Eight test receivers were made, in which the following properties were varied: Size of the PV cells, type of silicone used to encapsulate the cells, existence of a strain relief between the cells, size of the gap between cells, and type of cell soldering (line or point). The test receivers were placed eight times in an oven for one hour at eight different monitored temperatures. The temperature of the last round was set at 220 °C, which exceeds the highest temperature the panel design reaches. Before and after each round in the oven, the following tests were conducted to the receivers: Electroluminescence (EL) test, IV-curve tracing, diode function, and visual inspection. The test results showed that the receivers made with the transparent silicone and strain relief between cells experienced less microcracks and lower power degradation. No prototype test receiver lost more than 30% of its initial power, despite some receivers displaying a large number of cell cracks. The transparent and more elastic silicone is better at protecting the solar cells from the mechanical stress of thermal expansion than the compared silicone alternative, which was stiffer. As expected, larger cells are more prone to develop microcracks after exposure to thermal stress. Additionally, existing microcracks tend to grow in size relatively fast under thermal stress. EL imaging taken during our experiment leads us to conclude that it is far more likely for existing cracks to expand than for new cracks to appear.
Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities
Authors: Kolasiński Piotr
Published: August 2019

This paper reviews the applications of the multi-vane expanders in ORC (organic Rankine cycle) systems. The operating principle and design of the ORC systems are addressed in the introduction. Then, there is a brief review of the expanders applied in small-power and micro-power ORCs, and a discussion of the multi-vane expander design and operating principle as an introduction to a comprehensive review on the applications of the multi-vane expanders in ORC systems. The different features of the multi-vane expanders—i.e., the design of the expander, its geometrical dimensions and operating conditions, durability, applied working fluid, obtained power output, and efficiency—are analyzed in this paper. This review clearly indicates that multi-vane expanders are a promising alternative to the different types of the expanders applied in ORC systems.
Common Carp mef2 Genes: Evolution and Expression
Authors: He Mei , Zhou Di , Ding Nai-Zheng , Teng Chun-Bo , Yan Xue-Chun , Liang Yang
Published: August 2019

The MEF2 (myocyte enhancer factor 2) family belongs to the MADS-box superfamily of eukaryotic transcription factors. The vertebrate genes compose four distinct subfamilies designated MEF2A, -B, -C, and -D. There are multiple mef2 genes in the common carp (Cyprinus carpio). So far, the embryonic expression patterns of these genes and the evolution of fish mef2 genes have been barely investigated. In this study, we completed the coding information of C. carpio mef2ca2 and mef2d1 genes via gene cloning and presented two mosaic mef2 sequences as evidence for recombination. We also analyzed the phylogenetic relationship and conserved synteny of mef2 genes and proposed a new evolutionary scenario. In our version, MEF2B and the other three vertebrate subfamilies were generated in parallel from the single last ancestor via two rounds of whole genome duplication events that occurred at the dawn of vertebrates. Moreover, we examined the expression patterns of C. carpio mef2 genes during embryogenesis, by using whole-mount in situ hybridization, and found the notochord to be a new expression site for these genes except for mef2ca1&2. Our results thus provide new insights into the evolution and expression of mef2 genes.