bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengaruh Model Diskursus Multy Representasy (DMR) Terhadap Kemampuan Pemecahan Masalah Matematika Siswa
Authors: Azizah Dewi , Handayani Farida Eka
Published: July 2020

Artikel ini bertujuan untuk mengetahui pengaruh model pembelajaran DMR terhadap kemampuan pemecahan masalah siswa. Penelitian ini merupakan penelitian kuantitatif eksperimental dengan desain penelitian posttest-only control design. Instrumen pada artikel ini menggunakan tes yaitu tes kemampuan pemecahan masalah siswa materi kubus dan balok. Data kemampuan pemecahan masalah diperoleh melalui posttest. Analisis data diolah dengan menggunakan uji-t. Hasil perhitungan analisis data diperoleh thitung (3,113) > ttabel (1,960), maka dapat dikatakan bahwa rata-rata kemampuan pemecahan masalah yang diajar dengan model DMR dan model Direct instruction terdapat perbedaan, serta kemampuan pemecahan masalah siswa yang diajar dengan model DMR lebih baik dari kemampuan pemecahan masalah siswa yang diajar dengan model Direct Instruction.
Struktur Berpikir Kombinatorik Siswa dalam Menyelesaikan Masalah Matematika
Authors: Rapanca Dion , Wibowo Teguh , Sapti Mujiyem
Published: July 2020

Penelitian ini dilakukan dengan tujuan untuk mendeskripsikan struktur berpikir kombinatorik siswa dalam menyelesaikan masalah matematika. Penelitian ini dilakukan pada kelas XII SMA Negeri 5 Purworejo tahun ajaran 2019/2020 yang sudah menerima materi kaidah pencacahan. Jenis penelitian ini adalah penelitian kualitatif. Teknik dalam pengambilan subjek menggunakan teknik purposive dengan subjek yang terpilih sebanyak dua siswa. Instrumen yang peneliti gunakan yaitu berupa lembar soal yang terdiri dari satu soal yang berkaitan dengan kaidah pencacahan, pedoman wawancara, dan alat bantu rekam. Diberikan satu permasalahan kombinatorik, yaitu masalah yang memuat kombinasi. Teknik pengumpulan data yang digunakan adalah tes, wawancara, dan think aloud. Langkah-langkah dalam menganalisis data adalah reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian diperoleh simpulan sebagai berikut. Struktur berpikir kombinatorik dalam menyelesaikan masalah matematika yakni mendapatkan rumus dari suatu masalah formulas/ekspressions (ungkapan/rumus). Kemudian melakukan perhitungan dari rumus yang sudah didapatkan counting processes (proses perhitungan). Set of Outcomes (seperangkat hasil) digunakan untuk proses perhitungan yang digunakan. Set of Outcomes (seperangkat hasil) dapat dilakukan karena soal yang diberikan masih sederhana
Antipsikotik İlaçlar ve Periferik Ödem: Bir Derleme
Authors: ÖRÜM Mehmet Hamdi
Published: July 2020

Antipsikotikler, şizofreni ve bipolar bozukluk gibi çeşitli psikiyatrik bozuklukların tedavisinde uzun yıllardır kullanılmaktadır. Distoni, tardif diskinezi, akatizi, sedasyon, kilo artışı, aritmi antipsikotiklerin bazı yan etkilerindendir. Periferik ödem antipsikotiklerin bir diğer önemli yan etkisidir. İnterstisyel alanda normalde bulunması gerekenden daha fazla sıvı bulunması olarak tanımlanabilecek periferik ödemin hem birinci kuşak antipsikotikler hem de ikinci kuşak antipsikotiklerle ilişkisi bildirilmiştir. Bu yan etkinin olası mekanizmalarını açıklamak için aşırı duyarlılık ve vazodilatasyon, doz-cevap ilişkisi, doz artırım hızı ve alerjik reaksiyon modelleri oluşturulmuştur. Hasta konforunu bozan bu yan etkinin ayırıcı tanısı ve olası risk faktörlerinin belirlenmesi önem arz etmektedir. Bu hastalar, multidisipliner bir yaklaşımla ele alınmalı ve müdahalede geç kalınmamalıdır. Hasta ve yakınlarının bu yan etkiye karşı uyarılması gerekmektedir.
El rol de la televisión en la socialización política de los niños: resultados preliminares
Authors: Huerta Enrique , Bañuelos Berenice , Rodríguez Alejandra , Iliana Sandra , Gómez Carmen
Published: July 2020

Este trabajo reporta hallazgos preliminares del análisis de 60 entrevistas grupales semiestructuradas (n=180) realizadas en marzo de 2006 en Coahuila, Nuevo León y Tamaulipas. Las entrevistas fueron realizadas para explorar la relación entre la televisión y la socialización política de los niños. Específicamente, el análisis pone atención a la relación entre los procesos de comunicación interpersonal; la exposición a los contenidos televisivos; las concepciones, los valores y las orientaciones políticas, y las prácticas y competencias cívicas. Un punto de partida para este estudio es que la visibilidad de la esfera pública en pleno proceso electoral permite que los niños tengan una visión más cercana de los procesos políticos. Los hallazgos han permitido el diseño de un modelo estructural que será confrontado en una fase posterior del estudio.
Adolescencia sin Otredad: Identidad y Comunicación
Authors: Reyes Enríquez Pedro Octavio , Córdoba Zamudio Miguel Ángel
Published: July 2020

En el presente trabajo se analiza un fenómeno que puede presentarse en la adolescencia denominado “adolescencia sin otredad”, en el que por momentos el adolescente se visualiza en la dinámica y feroz lucha por su autodeterminación; en la búsqueda de su identidad, autonomía e individualidad. Durante este proceso parece experimentar un aislamiento y una separación de su contexto primario de formación (familia), para refugiarse principalmente en el grupo de amigos y en los medios de comunicación; asimismo, manifiesta una sensación de vacío, de soledad, de un sin sentido de la vida, enfrentando su tiempo de desarrollo sin la presencia de los otros (principalmente padres), inclusive desea estar sin ellos, sintiéndose poco apoyado por su entorno. En este lapso los medios de comunicación ocupan un lugar especial, pero también se derivan otros comportamientos que se describen en este trabajo, que es resultado de la investigación realizada en la zona conurbada Veracruz-Boca del Río, en el Estado de Veracruz, durante 2004 y 2005.
Rehacer el tejido de Penélope: mujeres y reproducción de la emigración
Authors: Gaspar Bojórquez Ana Leticia
Published: July 2020

Una investigación que aborda la migración en una comunidad representativa de Jalisco, a través de lo expresado por las mujeres relacionadas con los emigrantes, desde la perspectiva cultural, es decir, del estudio del habitus y las formas simbólicas de las comunidades, entendidos como el campo de fenómenos significativos, con el propósito de comprender cómo se producen, se transmiten, se reciben y se reproducen dichas formas simbólicas para fomentar la migración y conocer cómo están mediando las mujeres en la reproducción de este fenómeno. Se decidió utilizar la entrevista semiestructurada como instrumento básico para la interlocución con las mujeres. Se realizaron entrevistas a mujeres relacionadas con los emigrantes: esposas, madres, hermanas e hijas. Después del análisis del primer grupo de entrevistas, se establecieron las categorías de análisis y una primera triangulación con la teoría; se estableció la descripción del papel reproductor que las mujeres están desempeñando respecto a la migración.
La formación en comunicación en Tijuana: apuntes sobre un modelo de plan de estudios de la licenciatura en comunicación de la UABC, Tijuana
Authors: González Hernández David , León Barrios Gerardo , Serrano Carrasco Ángela
Published: July 2020

El presente artículo es una síntesis del documento original de la reestructuración del plan curricular en la licenciatura en comunicación en la UABC Tijuana, bajo el modelo por competencias. En él se expone, primeramente, un mapa de las dimensiones y contextos desde donde se hace dicha reestructuración. De manera central se exponen algunos aspectos metodológicos sobre los cuáles se diseñó y aplicó un estudio para diagnosticar la situación de la enseñanza de la comunicación en esta frontera. Finalmente, partiendo de los resultados de dicho diagnóstico, presentamos los ejes vectores sobre los que se fundamenta la nueva propuesta curricular para desarrollar las competencias de formación en el contexto fronterizo.
Corrección de la acidez del suelo : alteraciones químicas del suelo
Authors: Sadeghian Siavosh , Díaz Marín Carolina
Published: July 2020

La alternativa más común para corregir la acidez del suelo consiste en el empleo de enmiendas calcáreas. El objetivo de esta investigación fue determinar el efecto del encalamiento en la fertilidad de algunos suelos representativos de la zona cafetera de Colombia. Se evaluaron las propiedades químicas de cinco suelos luego de un mes de incubación con cinco dosis de cal (0; 1,25; 2,50; 5,00 y 10,00 g dm-3). Los tratamientos afectaron diferencialmente a los suelos en su pH, Ca2+, Mg2+, CIC, Al3+, Fe2+, Mn2+, NO3-, saturación de bases y relación de bases intercambiables. El pH del suelo logró explicar con mayor ajuste las variaciones de Al3+ que el porcentaje de saturación de Al3+. La CIC, determinada mediante el acetato de amonio 1 M y con pH=7,0, no fue un método adecuado para determinar el efecto del encalamiento; caso contrario ocurrió con la solución no-tamponada de cloruro de bario. Se presentó una alta correlación entre el porcentaje de saturación de bases y el pH para cada suelo; sin embargo, no se encontró una tendencia que pudiera explicar las variaciones de todos los suelos de manera conjunta. Los cambios de la CIC, generados por el incremento del pH que ocasionó el encalamiento, estuvieron en función de los contenidos de la materia orgánica. Una parte de los contenidos de Ca y Mg determinados en el análisis del suelo correspondió a la fracción no intercambiable, resultado que se relacionó con la baja solubilidad de la cal y soporta su efecto residual.
Producción de café en respuesta al fraccionamiento de la fertilización.
Authors: González-Osorio Hernán , Sadeghian Siavosh
Published: July 2020

La fertilización constituye una práctica clave en la producción de café y su efectividad depende de la pertinencia y oportunidad con la que se efectúe. Considerando la diversidad de suelos en los que se cultiva el café en Colombia, el costo de los fertilizantes y las variaciones de los factores climáticos que inciden en el cultivo, el fraccionamiento de la fertilización es una estrategia tendiente al incremento de la productividad. El presente estudio tuvo como objetivo evaluar el efecto del fraccionamiento de la fertilización en la producción anual de café y en el acumulado del ciclo productivo, en seis localidades de la zona cafetera (El Agrado-Quindío, El Rosario-Antioquia, Naranjal-Caldas, Paraguaicito-Quindío, El Porvenir-Caldas y San Antonio-Santander), con características climáticas y de suelos diferentes. Las dosis de fertilizante se establecieron según las recomendaciones del análisis de suelo, para cada localidad y se aplicó fraccionado en dos, tres, cuatro y seis veces al año. En cinco localidades no hubo efecto del fraccionamiento, pese a que la pluviosidad superó en al menos dos años de evaluación, los niveles históricos de más de 30 años. En Paraguaicito, cuyo suelo presenta alta conductividad hidráulica, fraccionar el fertilizante en cuatro y seis oportunidades condujo al aumento promedio del 12% en la producción solamente en uno de los cuatro años evaluados. Los resultados permiten concluir que el suministro del fertilizante requerido según el análisis de suelos puede hacerse en dos fracciones por año.
Corrección de la acidez del suelo: alteraciones químicas del suelo
Authors: Sadeghian Siavosh , Díaz Marín Carolina
Published: July 2020

La alternativa más común para corregir la acidez del suelo consiste en el empleo de enmiendas calcáreas. El objetivo de esta investigación fue determinar el efecto del encalamiento en la fertilidad de algunos suelos representativos de la zona cafetera de Colombia. Se evaluaron las propiedades químicas de cinco suelos luego de un mes de incubación con cinco dosis de cal (0; 1,25; 2,50; 5,00 y 10,00 g dm-3). Los tratamientos afectaron diferencialmente a los suelos en su pH, Ca2+, Mg2+, CIC, Al3+, Fe2+, Mn2+, NO3-, saturación de bases y relación de bases intercambiables. El pH del suelo logró explicar con mayor ajuste las variaciones de Al3+ que el porcentaje de saturación de Al3+. La CIC, determinada mediante el acetato de amonio 1 M y con pH=7,0, no fue un método adecuado para determinar el efecto del encalamiento; caso contrario ocurrió con la solución no-tamponada de cloruro de bario. Se presentó una alta correlación entre el porcentaje de saturación de bases y el pH para cada suelo; sin embargo, no se encontró una tendencia que pudiera explicar las variaciones de todos los suelos de manera conjunta. Los cambios de la CIC, generados por el incremento del pH que ocasionó el encalamiento, estuvieron en función de los contenidos de la materia orgánica. Una parte de los contenidos de Ca y Mg determinados en el análisis del suelo correspondió a la fracción no intercambiable, resultado que se relacionó con la baja solubilidad de la cal y soporta su efecto residual.
Mi a baj a migrációval?
Authors: Stauber Péter
Published: July 2020

The big book released by the publisher Springer has a lot of internationally accepted editors. Professor Helmut Kury, criminal psychologist and professor emeritus of the Albert Ludwig University in Freiburg and research fellow of the Max Planck Institute in Freiburg specialised in foreign and international criminal laws. The Polish penologist and criminologist Sławomir Redo, lecturer at the Faculty Law of the Vienna University, professor of the Łazarski University in Warsaw, who worked at numerous posts of the United Nations and is today the fellow of the Academic Council at the United Nations. This book edited by them is without doubt an imposing creation. It is true both considering its extent – as this book includes more than thousand pages – its diversity and the professional knowledge of the authors.
Rendészettan
Authors: Bócz Endre
Published: July 2020

The professional literature of law has been enriched with a stopgap new book: in the series Studia Universitatis Communa issued the publisher Dialóg Campus Kiadó the new work of Géza Finszter. The corpulent book of nearby 500 pages is even as a spectacle admirable. Its author designed it as a textbook but as he mentioned it can be handled as a handbook for law enforcement right, too. Although it includes relatively many legal rule texts that could harm the long-standing character of a handbook. The book consists of an introductory part and of ten chapters with detailed explications.
MODERN TECHNOLOGIES IN LOGISTICS
Authors: Port M. S.
Published: July 2020

This article describes modern digital technologies used in logistics. The assessment of the state's contribution to their development is given.
Can the Cosmological Dilation Explain the Skewness in the Gamma-Ray Burst Duration Distribution?
Authors: Tarnopolski Mariusz
Published: July 2020

In order to explain the origin of skewness in the gamma-ray burst (GRB) duration distribution, a statistical model, based on the cosmological time dilation and taking into account the GRB formation rate and instrumental effects, is examined. It is concluded that the considered effects are able to account for only a small fraction of the observed skewness. Therefore, its origin needs to be searched for in the processes governing the progenitors of GRBs​.
Military Surgeon - an Endangered Profession in the Czech Army?
Authors: Lochman Petr , Novotný Antonín
Published: July 2020

The Czech Army Military Medical Service is actually going through radical changes that could lead to the strong enhancement of its capabilities. The problem is a shortage of health personell in some specific medical branches to fulfill these ambitions. There are only 35 surgeons in the Czech army at present. Results of questionnaire survey performed in this group show a high level and preparedness for multinational deploytment in foreign missions, on the other hand put a lot of questions for future.
Iron deficiency and heart failure
Authors: Rushid Mesut , Chalakova Tatiana , Mircheva Lilyana , Kisheva Antoniya , Yotov Yoto
Published: July 2020

Heart failure (HF) is a common and with poor prognosis disease that impairs quality of life. There are many causes of symptomatic worsening, but lately particular attention has been paid to iron deficiency and anemia as a cause. The reduced iron content in the body has turned to be a new important target for treatment in patients with HF. The aim of this study is to search for the prevalence of iron deficit in patients with HF hospitalized for exacerbation of existing or newly developed symptoms, and to establish its relationship with important prognostic parameters of patients. Patients and Methods: 209 consecutive patients with different etiology of HF were examined and hospitalized at the Cardiology Clinic of the University Hospital "St. Marina", Varna, at an average age of 68,89±12,06 (30-94 years), 58% of them male. Basic demographic variables, creatinine and eGFR were investigated, as well as an echocardiographic study, and a 6-minute walking test was performed. Iron deficit (ID) is formulated at ferritin values ​​<100 µg/l, or if values ​​are 100-300µg/l, then transferrin saturation should be <20%. An alternative method for determining ID was also used, correlating the two methods. Statistical methods include descriptive methods and Cohen's method of calculating the coefficient κ (Kappa) for determining agreement between two diagnostic methods. Results: There were 146 (70%) patients presenting with ID, with isolated deficiency without anemia occurring in 38% of patients. Anaemic syndrome is found in 87 (41.6%) of all patients, with 76% of anemia cases being iron deficient. Isolated ID is more common in women - 42 (48%) than in men - 38 (31%), p=0.014. There is no significant difference in age, EF, physical capacity, and glomerular filtration rate between patients with and without ID. The incidence of ID is similar in patients with different types of HF - with preserved, mid-range, or decreased EF. There is not a very good agreement between the different methods of determining ID, with coefficient κ=0.31. Conclusions: Iron deficit is common in patients with HF of various etiology and different forms, regardless of the presence of anemia. Females are more vulnerable to this disorder. Its significant presence and role in the prognosis and symptomatology of the patients require that patients be screened for ID and corrected consequently after its detection.
Does an open access journal about vegetation still make sense in 2020?
Authors: Gigante Daniela , Bacchetta Gianni , Bagella Simonetta , Viciani Daniele
Published: July 2020

The current issue is the first one of the new version of Plant Sociology, the international peer-reviewed journal of the "Società Italiana di Scienza della Vegetazione" (SISV). The technical management of the journal has been entrusted to the editorial platform Pensoft, the Editorial Board has been largely reshaped, now including also a dedicated Social media team. Plant Sociology is focused on all aspects of vegetation from phytocoenosis to landscape level, through time and space, at different geographic and ecological scales; the journal contributes to spread around the issues related to management and conservation of plant communities and plant diversity. All the articles are freely available in Open Access (OA) with affordable article processing charge (APC). In the present Editorial, we briefly discuss the importance of opening the access to knowledge and data about vegetation. We believe that disseminating plant science might be a precious tool for understanding ecological processes, modelling future trends and supporting decision makers. The introduced technological improvement will hopefully allow a larger visibility and circulation for the papers published on Plant Sociology.
RETRACTED: Thermal investigation of montmorillonite/BSA by Fourier Transform InfraRed Spectroscopy measurements
Authors: Caccamo Maria Teresa ,   Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università di Messina, Viale Ferdinando Stagno D'Alcontres n 31, S. Agata, 98166 Messina, Italy, Mavilia Giuseppe , Mavilia Letterio , Calandra Pietro , Lombardo Domenico , Magazù Salvatore ,   Dipartimento di Patrimonio, Architettura e Urbanistica; Università Mediterranea di Reggio Calabria, (PAU), Via Melissari, I-89124 Reggio Calabria, Italy,   Consiglio Nazionale delle Ricerche, Istituto per lo Studio Materiali Nanostrutturati, Via Salaria Km 29,300 00015 Monterotondo Stazione (Roma), Italy,   CNR–IPCF, Istituto per i Processi Chimico Fisici – (Sez. Messina) Viale F. Stagno D'Alcontres, 37. I-98158, Messina, Italy
Published: July 2020

This paper reports the analysis of the intramolecular OH stretching band obtained by Fourier Transform Infrared (FTIR) spectroscopy measurements. In order to characterize the effect of montmorillonite on the properties of Bovine Serum Albumin (BSA) the two-state model is adopted for the analysis of the OH stretching band. We assume that the OH stretching can be divided into two different states of inter-molecular bonding. The results of this experimental work confirm that the montmorillonite leads to a stabilization of the BSA structure. Also, the analysis of the spectra temperature dependence shows a montmorillonite-induced higher thermal stability of the BSA in respect to pristine BSA. Thus, this paper allows to highlight the importance of montmorillonite as thermal bio-protector: this is also evidenced by the theory widely discussed in the following introduction regarding the birth of the first life forms on earth in montmorillonite clay, in which the protective role of the montmorillonite interlayer space is also highlighted. A FTIR analysis was carried out to investigate the interaction of montmorillonite with BSA. Two different approaches, i.e. Spectral Distance and Wavelet analyses, constitute two effective and innovative approaches for the characterization of the thermal properties of pristine BSA and of BSA in the presence of montmorillonite. The results allowed us to consider as BSA in the presence of montmorillonite has a lower spectral sensitivity when the temperature changes and, therefore, the role of montmorillonite as a thermal bio-protector is motivated.
Sufficient optimality conditions using convexifactors for optimistic bilevel programming problem
Authors: Kohli Bhawna
Published: July 2020

The main aim of this paper is to establish sufficient optimality conditions using an upper estimate of Clarke subdifferential of value function and the concept of convexifactor for optimistic bilevel programming problems with convex and non-convex lower-level problems. For this purpose, the notions of asymptotic pseudoconvexity and asymptotic quasiconvexity are defined in terms of the convexifactors.
Strategic joining in a single-server retrial queue with batch service
Authors: Sun Ke , Wang Jinting , Zhang Zhe George
Published: July 2020

We consider a single-server retrial queue with batch service where potential customers arrive according to a Poisson process. The service process has two stages: busy period and admission period, which are corresponding to whether the server is in service or not, respectively. In such an alternate renewal process, if arrivals find busy period, they make join-or-balk decisions. Those joining ones will stay in the orbit and attempt to get into server at a constant rate. While, if arrivals find the server is in an admission period, they get into the server directly. At the end of each admission period, all customers in the server will be served together regardless of the size of the batch. The reward of each arrival after completion of service depends on the service size. Furthermore, customers in the orbit fail to get into the server before the end of each service cycle will be forced to leave the system. We study an observable scenario that customers are informed about the service period upon arrivals and an unobservable case without this information. The Nash equilibrium joining strategies are identified and the social- and profit- maximization problems are obtained, respectively. Finally, the optimal joining strategies in the observable queue and the comparison of social welfare between the two queues are illustrated by numerical examples.
Modeling and computation of mean field game with compound carbon abatement mechanisms
Authors: Zhang Shuhua , Zhao Junying , Yan Ming , Wang Xinyu
Published: July 2020

In this paper, we present a mean field game to model the impact of the coexistence mechanism of carbon tax and carbon trading (we call it compound carbon abatement mechanism) on the production behaviors for a large number of producers. The game's equilibrium can be presented by a system which is composed of a forward Kolmogorov equation and a backward Hamilton-Jacobi-Bellman (HJB) partial differential equation. An implicit and fractional step finite difference method is proposed to discretize the resulting partial differential equations, and a strictly positive solution is obtained for a non-negative initial data. The efficiency and the usefulness of this method are illustrated through the numerical experiments. The sensitivity analysis of the parameters is also carried out. The results show that an agent under concentrated carbon emissions tends to choose emission levels different from other agents, and the choices of agents with uniformly distributed emission level will be similar to their initial distribution. Finally, we find that for the compound carbon abatement mechanism carbon tax has a greater impact on the permitted emission rights than carbon trading price does, while carbon trading price has a greater impact on carbon emissions than carbon tax.
Preferences for partial information and ambiguity
Authors: Li Jian
Published: July 2020

We commonly think of information as an instrument for better decisions, yet evidence suggests that people often decline free information in nonstrategic scenarios. This paper provides a theory for how a dynamically‐consistent decision maker can be averse to partial information as a consequence of ambiguity aversion. It introduces a class of recursive preferences on an extended choice domain, which allows the preferences to depend on how information is dynamically revealed and to depart from the standard expected‐utility theory. A new notion of ambiguity aversion, called Event Complementarity, exactly characterizes aversion to partial information. Familiar static ambiguity‐averse preferences are embedded into the general recursive model, in which conditions for partial information aversion are identified. The findings suggest that Event Complementarity overlaps with yet still differs from the conventional notion of ambiguity aversion.
School choice with asymmetric information: Priority design and the curse of acceptance
Authors: Kloosterman Andrew , Troyan Peter
Published: July 2020

We generalize standard school choice models to allow for interdependent preferences and differentially informed students. We show that, in general, the commonly used deferred acceptance mechanism is no longer strategy‐proof, the outcome is not stable, and may make less informed students worse off. We attribute these results to a
curse of acceptance. However, we also show that if priorities are designed appropriately, positive results are recovered: equilibrium strategies are simple, the outcome is stable, and less informed students are protected from the curse of acceptance. Our results have implications for the current debate over priority design in school choice.
Out of policymaker’s sight: the role of banks’ liquidity preference in credit supply in Brazil
Authors: Ultremare Fernanda , Mattos Olívia Bullio
Published: July 2020

In modern, sophisticated banking systems, in addition to endogenously creating money, banks have the ability to innovate and stretch constraints on their portfolio to potentially raise profits. They fulfill demand for credit according to their liquidity preference and expectations of profits. On the other hand, the monetary authority influences credit supply by changing the availability of liquid assets compared to other assets through monetary policy instruments. By managing liquidity in the reserves market, central banks modify the price of access to short-term liquidity – the interest rate – and, thereby, cause changes in the yield curve and transform banks’ propensity to expand credit. Even though determining credit supply is a difficult task since it depends on expectations and cannot be calculated in advance, this paper aims to determine a credit supply function for Brazil. Our empirical strategy was to estimate a dynamic panel data model on a large cross-section bank-level dataset from the Brazilian Central Bank using balance sheet information from the fifty largest banks operating in the country from 1999 to 2016. Credit outstanding was matched with time-varying indicators that were prepared using data from banks’ portfolios and then combined with macroeconomic variables. We use a Post-Keynesian framework to analyze the relation between credit supply and the balance sheet composition of banks. Our findings suggest that variations in banks’ liquidity preference which are reflected on their changes in flexibility and leverage indicators have a significant impact on credit supply in Brazil.JEL codes: E51, E52, E47
Financialization, coalition of interests and interest rate in Brazil
Authors: Bresser-Pereira Luiz Carlos , Paula Luiz Fernando de , Bruno Miguel
Published: July 2020

Studying the hypothesis of a pro-conservative monetary policy convention in Brazil, as initially formulated by Bresser-Pereira and Nakano (2002) and Erber (2011), we add three particular sub-hypotheses to it: (i) the prevalence of high real interest rates in Brazil for decades has led to the formation of a rentier-financial class coalition. Its aim is to maintain high real interest rates so as to gain from the resulting financialization process, fueled by interest revenues (ii) the existence of a “two-way“ public debt contagion effect between the banking reserves market and the public securities market; and (iii) the use of a high interest rate to finance current account deficits. To this end, the paper adopts as its starting point Keynes’s view of the interest rate as an eminently conventional phenomenon.
Fracture Propagation Pathways Pattern on UV-Irradiated Double-Edge Cracked of Mordenite Zeolite-HDPE Composites
Authors: Purnomo Purnomo , Setyarini Putu Hadi
Published: July 2020

Mechanical failure of zeolite-high density polyethylene (HDPE) material applied to skull bone implants is a material fracture that cannot be controlled. An important step to minimize failure due to fracture is to understand the fracture characteristics indicated by the propagation path pattern. This study aimed to investigate the fracture propagation pathways of zeolite-HDPE composites in quasi-static conditions. UV-irradiated Double-edge cracked zeolite-HDPE composite was tested in mode I (a stress perpendicular to the plane of the crack) in a universal testing machine (UTM) with a crosshead speed of 2 mm/min at a constant room temperature of approximately 25°C. The stress and elongation were registered by the UTM. During loading, the evolution of cracks in the ligament length region was recorded with the camera so that the crack propagation pathway until the total fracture occurs can be clearly observed. The results show that the crack propagation pathway patterns were not all straight and parallel to the ligament length. They are also found in a deviant state of the ligament length line by forming an angle α. created between the ligament length line and the fracture propagation deviation direction. This deviation occurs after the crack propagates straight away from the initial-cracks.
Arrhenius Kinetic Analysis during Combustion of Spirulina platensis Microalgae
Authors: Sukarni Sukarni , Anwar Muklisul
Published: July 2020

Characteristics and potential of microalgae Spirulina platensis as an energy source were studied in regard to the decomposition patterns, as well as kinetic and thermodynamic parameters. The thermogravimetric analysis was performed using the TGA instrument (Mettler Toledo TG DSC 1) at a heating rate of 30 °C/min, with an atmospheric air flow-rate of 100 ml/min at the temperature range of 25-1000 °C. The kinetic was evaluated using a differential method of Arrhenius. The results showed that Spirulina platensis microalgae decomposed into three stages. The first stage is related to the evaporation of moisture, the second stage is associated with the release of volatile matter, and the final stage is the combustion stage of char. The kinetic evaluation resulted in the respective activation energy (), pre-exponential factor (log A) and reaction order (n) are 53.57 kJ/mol, 4.4 min-1, and 1.73. It also understands from the thermodynamic analysis that the respective values of enthalpy (), Gibbs free energy ( and the entropies ( were 48.50 kJ/mol, 146,73 kJ/mol, and-174,78 J/mol.
Fabrication of Bilayer Fe2O3/ZnO Photoanode and its Photoelectrochemical Performance
Authors: Abadi M. Tommy Hasan , Maryam Siti , Yudyanto Yudyanto , Zulaikah Siti , Mufti Nandang
Published: July 2020

Hematite (Fe2O3) is one of the abundant magnetic materials in nature. Hematite has good absorption ability in the region visible light and good electrochemical stability, which make this material is potential as photoanode for photoelectrochemical (PEC) cells. However, Fe2O3 has some disadvantages such as short hole diffusion length and low hole mobility. Therfore, it is necessarily to combine Fe2O3 with photocatalyst material to improve photoelectrochemical performances. ZnO is ones of photocatalist material with good electron mobility, wide band gaps, cheap and are easily fabricated. The aim of this study is to investigate the performance of bilayer Fe2O3/ZnO as photoanode for photoelectrochemical cell. The bilayer Fe2O3/ZnO was prepared by spin-coating techniques and doctor blade methods. The samples were characterized by X-ray diffarction, and Scanning Electron Microscopy. The performance of photoelectrochemical cell was investigated by Cyclic Voltammetry (CV) under light illumination. The result indicate that bilayer Fe2O3/ZnO has good photoelectrochemical properties.
Physical Properties Characterization and Design Comparation of Knee Implant with Ti6Al4V Material
Authors: Kurniawan Galih Adhi , Andoko Andoko , Wulandari Retno , Sunomo Sunomo , Putra Agus Dwi
Published: July 2020

This study aims to describe the results of characterization of physical properties and design comparation of knee implant. the characterization of the material was intended to determine the morphology using SEM, crystal structure using XRD, and chemical composition using XRF. In both designs, the simulation was carried out to get the total deformation value. Simulation is carried out by loading humans walking, jumping, and downstairs in 0-1.1 seconds. While the comparation was focused on comparizing the total deformation value from the human activity of walking, jumping, and downstairs to determine the optimum design. The finding of this study were SEM showed that many parallel strokes on Ti6Al4V, then XRD test showed that the crystallinity peak was at position 40.5189˚ which were indicated by the crystal orientation index [200] reaching 29.35 counts (cts), and Full Width Half Maximum (FWHM) at an angle of 0.288˚ which had an atomic distance along the length of 2.2246 (Å ) with a relative intensity of 100%. And the XRF test showed the highest chemical content of Ti6Al4V was Ti, amounting to 85.12%. This was indicated by the total maximal deformation of the first design 0.23030 micormeter while the second design was 2.109600 micrometer, so the first design was more recommended for implant use. While comparation of total deformation showed that the first design had the lowest maximum average deformation value. The results showed that the first implant design was the optimum design.
Electrophoretic Deposition (EPD) of Natural Hydroxyapatite Coatings on Titanium Ti-29Nb-13Ta-4.6Zr Substrates for Implant Material
Authors: Fajri Hidayatul , Ramadhan Fuad , Nuswantoro Nuzul Ficky , Juliadmi Dian , Tjong Djong Hon , Manjas Menkher , Affi Jon , Yetri Yuli , Gunawarman Gunawarman
Published: July 2020

This study aims to investigate the effect of the electrophoretic deposition process (EPD) of natural HA (extracted from bovine bones) with various particle size on Ti-29Nb-13Ta-4.6Zr (TNTZ) coating surfaces. HA particles were refined from bovine bone powders using planetary ball mill and then sieving to separate the particle based on its size. The maximum size according to sieving mesh size is #25 µm, #63 µm and #125 µm. The coating process was conducted by using EPD apparatus with voltage and time process 10V and 5 minutes, respectively, for each sample. The coating layer morphology was observed with Stereo Microscopy, Scanning Electron Microscopy (SEM) and the thickness was measured with Thickness Gauge. The result shows that the size of the particle determines the coating layer characteristics. The best of HA coating quality according to the implant coating standard is obtained for the 25 µm particle size with the surface coverage is 99%. The thickness is 121 µm and the ratio of chemical composition Calcium and Phosphor Ca/P) is 1,49%. These may be concluded that, on the point of view physical characteristics, natural HA from bovine bone has potential enough as a coating layer to improve the bioactivity implant for biomedical application. However, the mechanical characteristic of the layer is still needed to determine the strength of coating layer for avoiding delamination during application.
Solvent Effects on the Synthesis of Polymeric Nanoparticles via Block Copolymer Self-Assembly Using Microporous Membranes
Authors: Agustina Sri , Tokuda Masayoshi , Minami Hideto , Boyer Cyrille , Zetterlund Per B.
Published: July 2020

The self-assembly of block copolymers has attracted attention for many decades because it can yield polymeric nanoobjects with a wide range of morphologies. Membrane emulsification is a fairly novel technique for preparation of various types of emulsions, which relies on the dispersed phase passing through a membrane in order to effect droplet formation. In this study, we have prepared polymeric nanoparticles of different morphologies using self-assembly of asymmetric block copolymers in connection with membrane emulsification. Shirasu Porous Glass (SPG) membranes has been employed as the membrane emulsification equipment, and poly (oligoethylene glycol acrylate)-block-poly (styrene) (POEGA-b-PSt) copolymers prepared via RAFT polymerization. It has been found that a number of different morphologies can be achieved using this novel technique, including spheres, rods, and vesicles. Interestingly, the results have shown that the morphology can be controlled not only by adjusting experimental parameters specific to the membrane emulsification step such as membrane pore size and pressure, but also by changing the nature of organic solvent. As such, this method provides a novel route to these interesting nanoobjects, with interesting prospects in terms of exercising morphology control without altering the nature of the block copolymer itself.
Recyclability of Dental Gypsum via Calcination
Authors: Zakiyuddin Ahmad , Indrani Decky Joesiana , Khoirurrijal Rifqi A. , Astutiningsih Sotya
Published: July 2020

Nowadays, either keeping or throwing out the final product of dental cast is the most common thing to do. The waste from dentistry can be considered toxic if not handled specifically and separately to other waste. Hence, the recycling process can reduce its effect and the waste of dental casts. It can also reduce the cost of producing new high-grade dental gypsum. This paper studies the behavior of before-after recycle and heat treatment to several grades of dental gypsum that will be used as impression material or dies. As it is designed to be an impression material that will undergo heat treatment, Simultaneous Thermogravimetry and Differential Scanning Calorimetry (TGA-DSC) will be applied to understand the Phase Transformation to its mass change and the behavior to a temperature difference. The result will be validated using an experimental approach. X-ray Diffraction (XRD) and Scanning Electron Microscope will also be done to identify the crystalline phases and the surface microstructure, and it will be validated using an experimental approach as well. A range of gaps between parameter values is expected between the fresh/new dental gypsum and the recycled one. However, it is expected some similar values between the heat-treated and the fresh/new dental gypsum.
Ownership of Mother and Children's Health Book and Complete Basic Immunization Status in Slums and Poor Population
Authors: Hargono Arief , Megatsari Hario , Artanti Kurnia Dwi , Nindya Triska Susila , Wulandari Ratna Dwi
Published: July 2020

Background

The percentage of complete immunization in urban areas is higher than rural areas. The purpose of the study was to analyze the relationship between ownership of Maternal and Child Health (MCH) books with Complete Basic Immunization (CBI) coverage in slums and poor areas.

Design and methods

A rapid survey was conducted in selected slums and poor groups based on medical records from Public Health Center. Informants were mothers with a sample of 325 infants aged 12 to 23 months.

Results

The lowest coverage of CBI for slum and poor residents is Pasuruan, which is 55.4%. The results of statistical analysis showed that there was a significant relationship between ownership of MCH books and the complete coverage of basic immunization in Malang (P = 0.000; PR = 3.682); Pasuruan (P = 0.002; PR = 1.854); Sidoarjo (P = 0.000; PR = 4.042); Surabaya (P = 0.000; PR = 2.425).

Conclusions

It is recommended that the government should improve access to complete immunization programs in slums and poor population.
Nutritional Status, Family Income and Early Breastfeeding Initiation as Determinants to Successful Exclusive Breastfeeding
Authors: Shofiya Dian , Sumarmi Sri , Ahmed Faruk
Published: July 2020

Background

The target by the Indonesian public health services to obtain at least 50% exclusively breastfeed babies during the first 6 months has not been achieved, due to the increased in infant morbidity. This study aims to determine factors associated with exclusive breastfeeding.

Design and methods

The cluster random sampling method was used to obtain data from a total of 273 babies in the first 1000 days of life i.e. aged 6-24 months and analyzed using linear regression at α= 0.05. The data obtained were based on exclusive breastfeeding using maternal age, education, family income, frequency of antenatal care, nutritional status before pregnancy, place and mode of delivery, gestational age at delivery.

Results

The result showed that exclusive breastfeeding was significantly affected by nutritional status before pregnancy based on MUAC (P=0.15) and BMI (P=0.047), family income (P=0.047) and initiation of early breastfeeding (P=0.001).

Conclusions

In conclusion, nutritional status before pregnancy tends to benefit the family income, therefore, initiating early breastfeeding need to be improved for successful exclusive breastfeeding.
Factors Affecting Hardiness in Cancer Patients: A Case Study of the Indonesian Cancer Foundation
Authors: Dewi Erika Untari , Nursalam Nursalam , Mahmudah Mahmudah , Halawa Aristina , Ayu Azhari
Published: July 2020

Background

Cancer patients are usually filled with fear and anxiety but hardiness is a personal characteristic that makes them stronger, resistant, and optimistic in dealing with the pressures related to the disease. There are, however, several factors influencing hardiness and those include social support, parenting, and selfconfidence. Therefore, the objective of this study was to identify these factors in cancer patients at the Indonesian Cancer Foundation in Surabaya.

Design and methods

The study made use of observational design with a population of 70 and a total sample of 64 cancer patients were selected as respondents using simple random sampling. The research instrument used for data collection was a questionnaire and results were analyzed using Spearman statistical test.

Results

The results showed social support was 0.009, parenting patterns was 0.035, and confidence was 0.647. Therefore, H1 was accepted and this means there was a relationship between support and hardiness, as well as parenting patterns and hardiness. Moreover, H0 was also accepted and this indicates self-confidence did not have any influence on hardiness.

Conclusions

In conclusion, providing adequate support and good parenting have the ability to increase hardiness.
Pregnancy Disorders in Female Workers at the Industrial Area of Sidoarjo, Indonesia
Authors: Rahman Firman Suryadi , Martiana Tri
Published: July 2020

Background

The number of female workers in Indonesia has increased and female workers have been discovered to be very vulnerable to several hazards and health problems in the workplace environment linked to their menstrual cycle and pregnancy. Therefore, this study was conducted to analyze risk factors associated with pregnancy disorders in female workers.

Design and methods

The research was conducted through the use of a cross-sectional design with 307 female workers using simple random sampling. Furthermore, a descriptive analysis was conducted to describe the conditions of the respondents during pregnancy to childbirth process.

Results

The results showed 45% of respondents had pregnancy disorders, 16% had miscarriages, and despite the fact most of the prenatal care processes was assisted by doctors or midwives, 2.6% of the respondents consulted Traditional Birth Attendants, who were also recorded and was found to account for 2.9% of the deliveries. Moreover, the risk factors associated with pregnancy disorders include vibrations (P=0.004), irritants (P=0.002) and repetitive works (P=0.009).

Conclusions

It is recommended that companies should provide maternal and child health protection and control for any risk associated with female workers.
Health Promoting Hospital: A Practical Strategy to Improve Patient Loyalty in Public Sector
Authors: Wartiningsih Minarni , Supriyanto Stefanus , Widati Sri , Ernawaty Ernawaty , Lestari Retno
Published: July 2020

Background

The Health-Promoting Hospital (HPH) aims to improve the overall quality of health services for patient, families, and the community as a whole, with assessment and intervention as the essential components. In hospitals, this activity needs to be vigorously developed through interdisciplinary teamwork, shared decision-making process, and by involving patients and families during treatment and through the delivery of an evidence-based health promotion process. Previous studies analyzed some steps to improve patient loyalty through the HPH. However, limited studies were carried out on its use in the public sector. This study, therefore, aims to analyze the impact of HPHs to improve patient loyalty in the public sector.

Design and methods

The simple random sampling method was used to obtain data from 101 respondents in a public hospital, with the cross-sectional design used to gain a better understanding of patient loyalty.

Results

The result showed that HPHs influenced patient expectations (P=0.030), which in turn affected perceived value (P=0.014) and satisfaction (P=0.002). In addition, perceived value and satisfaction have effects on patients’ loyalty (P=0.001).

Conclusion

In conclusion, HPHs have a positive impact on patient loyalty. Therefore, the public sector needs to enhance its services in accordance with the standards and guidelines.