bluuebunny/crossref_metadata_2025 huggingface dataset:
A boundary value problem with a displacement for the generalized equation of Trikomi with a spectral parameter in an unbounded domain
Authors: Зуннунов Р.Т. , Хайдаров И.У.
Published: December 2021

В данной работе для обобщенного уравнения Трикоми со спектральным параметром в неограниченной области эллиптическая часть которой является горизонтальной полосой исследуется задача со смещением на характеристиках разных семейств. Единственность решения задачи доказывается методом интегралов энергии, а существование решения задачи методом функций Грина и методом интегральных уравнений.

In this paper, for the generalized Tricomi equation with a spectral parameter in an unbounded domain, the elliptical part of which is a horizontal strip, we study a problem with a shift on the characteristics of different families. The uniqueness of the solution to the problem is proved by the method of energy integrals, and the existence of the solution to the problem by the method of Green’s functions and the method of integral equations
Investigation of the influence of seismic activity on the semi transparency coefficient of the sporadic Es layer over Kamchatka
Authors: Богданов В.В. , Павлов А.В.
Published: December 2021

Мелкомасштабная турбулизация спорадического слоя Es (десятки метров) оценивается коэффициентом полупрозрачности Δf bEs, а крупномасштабная турбулизация (сотни метров) выражается в Es-рассеянии. Перед крупными землетрясениями с магнитудами M≥5.0 может наблюдаться формирование аномальных спорадических слоев в области E: увеличение электронной концентрации и коэффициента полупрозрачности на интервале от 14 до 3 суток до момента землетрясения и последующее резкое уменьшение значений этих параметров за 1 сутки до землетрясения. В данной работе проведён анализ изменений коэффициента полупрозрачности спорадического слоя Es, предшествующих наступлению землетрясений с магнитудой M≥5.0, произошедших в Камчатском регионе за период 2015–2019 гг. Произведена оценка прогностической эффективности параметра Δf bEs по методикам А. А. Гусева и Г. М. Молчана.

Small-scale turbulization of the sporadic Es layer (tens of meters) is estimated by the semi transparency coefficient Δf bEs, and large-scale turbulization (hundreds of meters) is expressed in Es scattering. It is known that before large earthquakes with magnitudes M≥5.0, the formation of abnormal sporadic layers in the E region can be observed: an increase in the electron concentration and semi transparency coefficient at the interval from 14 to 3 days before the earthquake and a subsequent sharp decrease in the values of these parameters 1 day before the earthquake. This paper analyzes changes in the semi transparency coefficient of the sporadic Es layer preceding the onset of earthquakes with a magnitude M≥5.0 that occurred in the Kamchatka region during the period 2015–2019. The prognostic efficiency of the parameter Δf bEs was evaluated using the methods of A. A. Gusev and G. M. Molchan.
Study of variability of the background aerosol content in the stratosphere over Tomsk by lidar measurement data in 2016-2019
Authors: Маричев В.Н. , Бочковский Д.А. , Бычков В.В.
Published: December 2021

В статье проводится анализ данных внутригодовой изменчивости вертикально-временной структуры аэрозоля и его интегрального наполнения в стратосфере, полученные на лидарном комплексе станции высотного зондирования атмосферы ИОА СО РАН за период 2016-2019 гг. В качестве первичной информации для анализа использовался массив данных из 357 суммарных сигналов, накопленных в отдельные ночи указанных годов. Интервал зондируемых высот простирался от 10 до 50-60 км, пространственное разрешение составляло 192 м., время накопления суммарного сигнала — 2 часа. По результатам наблюдений, как и в предыдущие годы, установлена устойчивая тенденция роста накопления стратосферного аэрозоля с середины года с максимальным содержанием в январе и убыванием до практического отсутствия в июне-июле. В верхней стратосфере (30-50 км) в течение всего года фоновый аэрозоль отсутствует.

The data of annual variability of the aerosol vertical-temporal structure and total content in the stratosphere, obtained at the lidar complex of the Siberian Lidar Station of the IOA SB RAS in 2016 — 2019. A data array of 357 total signals detected in individual nights of these years was used as the initial information for analysis. The range of the heights of sounding was from 10 to 50-60 km, the spatial resolution was 192 m, the accumulation time of the total signal was 2 hours. According to the results of observations, as in previous years, a steady increase trend in the accumulation of stratospheric aerosol was observed from the middle of the year with a maximum content in January and a decrease to a practical absence in June-July. The background aerosol is absent in the upper stratosphere (30–50 km) throughout the year.
The use of creative homework in mathematics in the study of the activation of cognitive activity in teaching schoolchildren
Authors: Яковлева Т.П.
Published: December 2021

В статье приведено исследование активизации познавательной деятельности с применением творческих домашних заданий по математике Описаны констатирующий, формирующий и контрольный этапы исследования, представлены анкеты диагностирования, приведены примеры системы творческих домашних работ по математике, а именно: исторический материал в виде сообщения и презентации к нему; ребусы; кроссворд; карточки с заданиями; проект; стенгазета.

The article provides a study of enhancing cognitive activity with the use of creative homework in mathematics. Describes the ascertaining, forming and control stages of the study, presents diagnostic questionnaires, gives examples of the system of creative homework in mathematics, namely: historical material in the form of a message and a presentation to it; puzzles; crossword; task cards; project; wall newspaper.
Experience with geophysical equipment at the «Asachinskoye» and «Ametistovoye» fields in order to obtain materials on engineering and geological conditions
Authors: Кокорева А.C. , Соловьев В.А. , Рылов Е.С.
Published: December 2021

В статье представлены результаты работы с приборами: измеритель «МЭРИ-24», генератор «Астра» и коммутатор «COMdd2» и набор из двух 32 — электродных электроразведочных кос с шагом приемно-питающих электродов 2 метра с целью получения материалов об инженерно-геологических условиях. Благодаря полученным данным, появляется возможность принять правильные решения при проектировании объектов строительства.

The article presents the results of working with devices: meter «MERI-24», generator «Astra» and switch «COMdd2» and a set of two 32 — electrode electrical prospecting streamers with a step of 2 meters of receiving and feeding electrodes in order to obtain materials about engineering and geological conditions. Thanks to the data received, it becomes possible to accept correct decisions in the design of construction projects.
Computational Assessment and Understanding of C6 Product Selectivity for Chromium Phosphinoamidine Catalyzed Ethylene Trimerization
Authors: Ess Daniel , Morgan Nathan , Maley Steven , Kwon Doo-Hyun , Webster-Gardiner Michael , Small Brooke , Sydora Orson , Bischof Steven
Published: December 2021

One approach to selectively generate 1-hexene is through ethylene trimerization using highly active Cr N-phosphinoamidine catalysts ((P,N)Cr). Depending on the ligand, (P,N)Cr catalysts can either generate nearly pure 1-hexene or form 1-hexene with significant mixtures of other C6 mass products, for example methylenecyclopentane. Here we report DFT transition state modeling examining 1-hexene catalysis pathways as well as pathways that lead to alternative C6 mass products. This provided qualitative and semi-quantitative modeling of the experimental 1-hexene purity values for several (P,N)Cr catalysts. Consistent with previous computational studies, the key 1-hexene purity-determining transition states were determined to be β-hydrogen transfer structures from the metallacycloheptane intermediate. The origin of selectivity for these (P,N)Cr catalysts can be attributed to steric effects in the transition-state structure with coordinated ethylene that leads to C6 impurities.
Ring-Opening of Epoxides by Pendant Silanols
Authors: SATHYAMOORTHI SHYAM , Nagamalla Someshwar , Mague Joel
Published: December 2021

We present a new ring-opening reaction of epoxides by pendant silanols, catalyzed by either Ph3C+BF4– or BINOL-phosphoric acid. In all cases examined, the reaction is perfectly regioselective and diastereoselective. Silanol epoxides derived from trans-allylic alcohols, cis-allylic alcohols, trans-homoallylic alcohols, and cis-homoallylic alcohols were all compatible and gave products from either endo- or exo-ring opening. With silanol epoxides derived from 4-alkenyl silanols, an unusual rearrangement to tetrahydrofuran products was observed, which is likely the result of tandem nucleophilic attacks. The utility of this methodology was demonstrated in a short preparation of protected D-arabitol.
Flora of Singapore precursors, 28: Taxonomic and nomenclatural clarification of Kadsura species (Schisandraceae) in Singapore
Authors: Chen J. , Ng X.Y. , Lim R.C.J. , Lua H.K. , Saunders R.M.K.
Published: December 2021

Recent taxonomic and floristic accounts list Kadsura scandens (Blume) Blume as the sole native Kadsura species in Singapore. However, these works have overlooked Ridley’s earlier documentation of another species, Kadsura verrucosa (Gagnep.) A.C.Sm., which was recorded under the misapplied name K. cauliflora. The reduction of Kadsura cauliflora to a synonym of K. scandens led to the uncritical acceptance of a single Kadsura species in Singapore. The confusion between Kadsura scandens and the morphologically similar K. verrucosa may be partly attributed to the demonstrably ambiguous lectotype of K. scandens. An epitype is therefore designated for Kadsura scandens. Key differences between the two Kadsura species and brief propagation notes are provided here.
Hubungan Pengetahuan tentang Covid-19 dengan Tingkat Kepatuhan Anak Remaja Menjalankan Protokol Kesehatan di Indonesia
Authors: Hikmah Insiyatul , Rosyidah Hanifatur , Adyani Kartika
Published: December 2021

The lack of knowledge about Covid-19 that teenagers have will cause teenagers to not comply with health protocols in Indonesia so that the spread of Covid-19 becomes uncontrollable. The purpose of this study is to determine the relationship between knowledge about Covid-19 and the level of compliance of adolescents in carrying out health protocols in Indonesia. The research design method was quantitative with a cross-sectional approach. The research subjects were adolescents in Indonesia with 400 respondents conducted on 29 October - 11 November 2020. The sampling technique used was snowball sampling with research instruments using a questionnaire with the chi-square test. There is a relationship between adolescent knowledge about covid-19 and handwashing (p-value=0,000), there is a relationship between adolescent knowledge about Covid-19 using masks (p-value=0,000) and there is between adolescent knowledge about Covid-19 and social distancing (p-value=0,006). It is hoped that the results of this study can be used as information material regarding the relationship between knowledge about Covid-19 and the level of compliance of adolescents in carrying out health protocols in Indonesia, for adolescents, it is hoped that they can increase knowledge about Covid-19 by watching the news on TV, reading newspapers, social media and from health workers, for further researchers, it is hoped that they need to conduct research with qualitative methods and use more varied variables related to knowledge about Covid-19 with the level of compliance of adolescents in carrying out health protocols in Indonesia.
Literature Review: Rencana Perawatan pada Gigi Anomali Anatomi Microdontia
Authors: Fauzan Ahmad Ferza , Hartomo Bambang Tri
Published: December 2021

Microdontia is a tooth size abnormality that indicates a smaller than normal tooth size, it can also be accompanied by deformities, namely with a cone or cone shape. The role of restoration in dentistry must fulfill various aspects, namely aesthetic needs and functions. This literature aims to provide information and an overview of the selection of the right treatment for patients with microdontia anatomical anomalies. Denture crown treatment is expected to meet consumer satisfaction in terms of aesthetics, phonation and mastication. Denture crowns or crowns can be made of several materials, namely metal, composite, acrylic and porcelain, besides a combination of the two materials such as metal-porcelain or what is often called porcelain fused to metal (PFM). PFM is used to restore severe tooth decay to protect the remaining tooth tissue structure, maintain occlusion and provide aesthetic value.
Pengaruh Jus Rumput Laut (Eucheuma Sp) terhadap Peningkatan Kadar Hb Ibu Hamil Trimester I dengan Anemia
Authors: Mawaddah Sofia , Adawiyah Rabiatul
Published: December 2021

The effect of anemia in pregnancy is not good for the mother, both during pregnancy, childbirth, and in the puerperium. One of the foods that contain iron is seaweed. Seaweed (Eucheuma sp) is one of the foodstuffs that contain several intermediate compounds needed in the synthesis of hemoglobin such as iron, protein, and vitamin B complex. The purpose of this study was to determine the effect of seaweed juice (Eucheuma sp) on increasing hemoglobin levels of pregnant women in the first trimester of anemia. This study was a pre-experimental study with a one-group pretest-posttest design with a sample of 30 pregnant women in the first trimester who met the inclusion criteria of the study. Researchers measured Hb levels before after being given seaweed juice, the statistical test used was the Paired T-Test test, p-value= 0,000. The conclusion from this study was that seaweed juice could increase Hb levels in first-trimester pregnant women with anemia.
Pengaruh Sekolah Secara Online terhadap Perilaku Sedentari yang Berisiko Obesitas pada Remaja Berumur 15-19 Tahun
Authors: Sinulingga Pika Asyera , Andayani Lita Sri , Lubis Zulhaida
Published: December 2021

Obesity is the accumulation of excessive fat in the body as a result of an imbalance in the amount of energy that enters and leaves the body. One of the causes of obesity is sedentary behavior. Sedentary behavior makes the activity passive. Behavior changes are also happening at this time due to the Covid-19 pandemic. Pandemic makes all activities to be carried out from the home to prevent the spread of the Covid-19 virus, like studying from home. Online school is considered more passive than offline school because when a rest period that can be used for physical movement through interacting with friends like playing together. Whereas online school, teenagers are only more dominant in being silent in front of a laptop or smartphone. This study aims to determine the effect of online school on sedentary behavior at risk of obesity in adolescents. This type of research is a quantitative study using a cross-sectional design. The number of respondents in this study consisted of 267 people. Data was obtained through the results of questionnaires which were conducted online using Google Forms. The results showed that online schools had a high risk of sedentary behavior by 49,1%, 44.9% of moderate risk, and less risk by 6,0%. Statistical test using chi-square obtained p-value=0,008 (<Î±=0,05). So it can be concluded that there is an effect of online schooling on sedentary behavior that is at risk of obesity in adolescents aged 15-19 years in the city of Medan.
Pijat Kaki dengan Losion Magnesium Menurunkan Stres Narapidana Perempuan
Authors: Udani Giri , Manurung Idawati , Yulyuswarni Yulyuswarni
Published: December 2021

Prisoners experience stress during detention, and this stress must be removed so that the behavior and mentality of prisoners can be quickly restored. Foot massage is one of the non-pharmacological therapies in stress management, which makes individuals more relaxed and able to avoid excessive stress reactions such as headaches, insomnia, anxiety, physical and mental fatigue. Magnesium is a mineral that plays an important role in the body's metabolism. Magnesium deficiency can cause migraines, insomnia, leg cramps, anxiety, arrhythmias, diabetes mellitus, and hypertension. Foot massage with magnesium lotion is expected to provide a relaxing effect as well as magnesium intake so that it can overcome the stress experienced by prisoners. This study aims to determine the effect of foot massage magnesium lotion on the stress level of female prisoners. The research method is a quantitative quasi-experimental design with a pre-test-post-test approach on 120 female prisoners by comparing stress levels before and after doing foot massage with magnesium lotion for 14 days. Foot massage with magnesium lotion is done independently. Based on the results of the study, there was a significant difference between stress levels before and after the intervention, there was no significant difference between the stress levels of respondents who had long been detained and those who had just been detained. Multivariate analysis showed that the main factor in stress levels was the sentence period. Foot massage using magnesium lotion is a supporter of reducing stress levels. This therapy should still be done because it helps reduce stress and is carried out independently by prisoners.
Peningkatan pH Saliva Perokok Aktif Menggunakan Permen Karet Xylitol
Authors: Asmalinda Wita , Sapada Edy , Agustin Yeni
Published: December 2021

The Smoker active for a long time has an impact on decreasing the pH of the saliva. The most obvious impact is on cholinergic receptors in the brain which activates nerve action which results in a decrease in salivary gland secretion. The risk of decreased salivary function increases with the length of smoking and the number of cigarettes per day. The purpose of this study was to determine the effect of giving xylitol gum to increase salivary pH in active smokers. This type of research is an experimental clinical trial with a comparison group (pretest and posttest with control group design). This research was conducted at the Ibnu Sina Clinic in Palembang for 14 days, on 5-18 December 2020. The sample in this study were active smokers who met the inclusion and exclusion criteria. The number of samples is 52 respondents. The homogeneity of the sample characteristic data and measurement results was assessed by using the Kolmogorov-Simov test. Description analysis to determine the mean and standard deviation. There was a significant increase in the mean value of Saliva pH in the treatment group. It was concluded that xylitol gum affected on increasing the salivary pH of active smokers.
Bermain Buku Pop-Up sebagai Terapi Gangguan Mental Emosional Pasca Bencana Tsunami
Authors: Sulastri Sulastri , Rohayati Rohayati , Febriaty Sary
Published: December 2021

Traumatic experiences can trigger mental-emotional problems in children, especially in disaster conditions. The purpose of this study is to describe mental and emotional problems in children in South Lampung after the Sunda Strait tsunami natural disaster after being given playing therapy with pop-up books. This study uses a quantitative design with quasi-experimental treatment. The population in this study were preschool and school-age children affected by the Sunda Strait tsunami who lived in temporary village shelters in three villages namely Way Muli Timur, Way Muli Barat, and Kunjir as many as 93 children. The mental-emotional state of the child will be measured before and after therapy. Data collection using the Strength Difficulties Questionnaire questionnaire. The test was conducted using the dependent t-test. The results of data analysis showed that in general the level of strength and difficulty of children was abnormally susceptible (63,4%) at the beginning of the measurement and increased towards normal, in other words, there was an effect of playing therapy with pop-up books on the child's emotional mentality. The results of the bivariate test showed that there was an effect of pop-up books play therapy on children's mental-emotional problems (p-value 0,002). It is recommended that play therapy be combined with other therapies, including consistently to reinforce for children from those closest to them, such as nuclear family and other children's closest people.
La PAF y la terapia dialética-conductual
Authors:   Universidad de Montana, Montana, USA, Waltz Jennifer , Landes Sara J. ,   University of Washington, Washington, USA, Holman Gareth I. ,   University of Washington, Washington, USA
Published: December 2021

"Este capítulo explora las intersecciones de la Psicoterapia Analítico-funcional (PAF; Kohlenberg y Tsai, 1991; Tsai et al., 2009) y la Terapia Dialéctica Conductual (TDC; Linehan, 1993a, 1993b) enfocándose en cómo el entrenamiento y la experiencia en un modelo puede enriquecer el trabajo con el otro. Ambos modelos terapéuticos entienden la conducta dentro de su contexto histórico y actual y desde la TDC se tiene en cuenta también el contexto biológico. Ambos tratamientos se caracterizan por aprovechar las oportunidades que surgen en la sesión para abordar las conductas problemáticas a medida que aparecen y reforzar activamente conductas más adaptativas. Asimismo, ambos hacen hincapié en la formación de una relación real, caracterizada por la compasión, la conciencia y la autenticidad. Tanto la PAF como la TDC otorgan importancia a que el terapeuta tenga una comprensión experimental de las conductas o habilidades que sugiere a sus clientes, así como un alto nivel de autoconciencia y capacidad para observar las reacciones de uno mismo en tiempo real..."
Adjuvant hyperbaric oxygen treatment of acute brain herniation after microsurgical clipping of a recurring cerebral aneurysm: a case report
Authors:   Department of Hyperbaric Oxygenation, Beijing Tiantan Hospital, Capital Medical University, Beijing, China, Liu Yaling
Published: December 2021

Introduction: Acute brain herniation is a life-threatening neurological condition that occasionally develops due to severe complications following cerebral aneurysm clipping. Strategies for managing acute brain herniation have not improved substantially during the past decade. Hyperbaric oxygen treatment (HBOT) may alleviate harmful effects of cerebral hypoxia, which is one of the most important pathophysiological features of acute brain herniation and, therefore, may be useful as an adjuvant therapy for acute brain herniation. A case treated with adjuvant HBOT is reported. Case report: A 60-year-old asymptomatic man presented with a recurring left middle cerebral artery bifurcation aneurysm with previous stent-assisted embolisation. After craniotomy for surgical clipping of the aneurysm, disturbance of consciousness and right hemiplegia occurred. Computed tomography (CT) images suggested simultaneous cerebral ischaemia and intracranial haemorrhage. Pharmacologic treatment resulted in no improvement. A CT scan acquired five days after surgery showed uncal and falcine herniation. HBOT was administered five days after surgery, and the patient’s condition dramatically improved. He became conscious, and his hemiplegia improved following seven sessions of HBOT. Simultaneously, CT images showed regression of the acute brain herniation. Conclusions: The patient had recovered completely at one year post-treatment. HBOT may be effective in the treatment of acute brain herniation following cerebral aneurysm clipping.
Cadenas de suministro global: perspectiva desde la gestión de existencias
Authors: Barragán Moreno Gabriel Ernesto
Published: December 2021

La condición actual de los negocios internacionales ha dado origen a modernas estructuras organizacionales caracterizadas por la interacción de diversos tipos de actores separados geográficamente por grandes distancias y vinculados por un flujo ininterrumpido de materiales e información. No obstante, dicha interacción se desarrolla bajo condiciones de incertidumbre, representando así un desafío para las organizaciones cuando la satisfacción del cliente prima en un mercado altamente competitivo. La relación sinérgica necesaria entre las compañías con relaciones comerciales de alcance global estimula su integración a través de cadenas de suministro concentradas en asegurar, de manera permanente, la operación continua en entornos complejos y altamente inciertos. La turbulencia de los mercados ha reivindicado la importancia de los inventarios dentro de la cadena de suministro como recurso que contribuye a su robustez ante eventos que afectan su normal operación, sin embargo, el mantenimiento de los inventarios y el almacenamiento contradicen los principios clásicos de eficiencia, consideración que justifica el tema central de este libro y que se incluye en tres unidades. La primera presenta, de manera general, la cadena de suministro global, mientras que la segunda hace referencia a la gestión de almacenes y la tercera a la gestión de inventarios.
Estudio sobre los parámetros de impresión para mejorar la inyección por goteo-sobre-demanda
Authors: Garduño Salvador Ivan , Fajardo Cornejo Josué , Rodríguez-Lugo Ventura , Estrada del Cueto Magali
Published: December 2021

Este estudio propone la optimización de las condiciones y parámetros de impresión por inyección piezoeléctrica de tintas basadas en óxido de zinc (ZnO) y óxido de zinc dopado con aluminio (Al:ZnO). Se imprimieron patrones con distinta resolución bajo condiciones y parámetros de eyección continua de tintas comerciales que poseen propiedades reológicas específicas para esta técnica. Estas tintas consisten en ZnO o Al:ZnO en forma de nanopartículas, las cuales están dispersadas en una combinación de alcoholes. Los patrones impresos son caracterizados mediante las técnicas de microscopia de fuerza atómica, elipsometría y microscopía óptica para determinar la variación en su morfología, espesor y uniformidad, respectivamente. Los resultados obtenidos dependen de la resolución y son la evidencia para determinar las condiciones y parámetros óptimos que permitan el traslape entre patrones impresos de otros materiales, de tal forma que se considere su uso en la fabricación de dispositivos semiconductores totalmente impresos.
Estudio teórico comparativo de Superaleaciones base Níquel: AlNi3 y ScNi3
Authors: Ángeles-Lezama Eva Cecilia , Rodríguez-Lugo Ventura , Sánchez-Castillo Ariadna , Camacho-Gónzalez Mónica Araceli , Salinas-Rodríguez Eleazar , Herrera-Carbajal Alejandro de Jesús
Published: December 2021

En el presente estudió teórico comparativo se utiliza el código SIESTA, utilizando como base la Teoría del Funcional de la Densidad (DFT) llevando a cabo el modelado y la optimización de las superaleaciones base Ni: AlNi3 y ScNi3 en su fase cristalina cúbica centrada en las caras (FCC) para entender las propiedades estructurales, electrónicas y ópticas. Empleando el pseudopotencial base: Aproximación de Gradiente Generalizado (GGA) por el autor Perdew-Burke-Ernzerhof (PBE). Para AlNi3 se obtuvo un parámetro de red de a0= 3.568 Å y para ScNi3 un parámetro de red de a0= 3.681 Å, demostrando que ambas estructuras tienen una transición electrónica directa con una base doble spin polarizada y un ancho de banda prohibida de 0.00 eV, obteniendo estructuras de bandas favorables y argumentativas de su fiel aplicación de ambos materiales en los álabes de turbinas de gas en la industria aeronáutica.
Caracterización de ficocianinas por resonancia magnética nuclear
Authors: Rodríguez-Beltrán Estefany , Martínez-Valdez Francisco Javier , Castillo-Minjarez José Miguel Ángel , Estrada-Martínez Raziel
Published: December 2021

Las ficobiliproteínas, como las ficocianinas que se extraen de las cianobacterias, tales como la Spirulina Plantesis son los principales pigmentos accesorios de la fotosíntesis en las cianobacterias. Se encuentran en asociación con la superficie exterior de las láminas fotosintéticas y forman parte del aparato de captación de luz del fotosistema II de luz. (Patel, A.,et al, 2005).La espectroscopia mediante resonancia magnética nuclear de proteínas (usualmente llamada RMN de proteínas) es un campo de la biología estructural en el cual se utiliza la espectroscopia RMN para obtener información sobre la estructura y dinámica de las proteínas. (Manuales MSD, 2020).
Desarrollo de un absorbedor plasmonico: evaluación como material termosolar
Authors: Martinez-Zuñiga Eduardo Carlos , Vilchis-Nestor Alfredo Rafael , Camacho-López Marco A. , Olea-Mejía Oscar F. , Estrada-Flores Miriam
Published: December 2021

El desarrollo de nuevos materiales que tengan la capacidad de absorber un amplio rango de longitud de onda, del espectro electromagnético, nos permitirá mejorar la eficiencia de las celdas termosolares. El uso de absorbedores plasmónicos ha permitido mejorar la captación de la radiación solar y así poder transformar la luz absorbida en energía eléctrica o térmica. En este trabajo abordaremos el efecto fototérmico que presentan los materiales plasmónicos, como el oro, plata y cobre, para transformar la radiación solar en energía térmica como consecuencia de la resonancia del plasmón superficial y la generación de puntos calientes entre nanopartículas, es por eso que obtendremos por el método de biosíntesis diferentes tamaños y morfologías de nanopartículas de oro, las cuales serán depositadas sobre un sustrato de aluminio poroso, para poder aumentar la interacción que presentan este tipo de materiales plasmónicos con la radicación solar. El diseño propuesto de Absorbedor Plasmónico se evaluó con una lámpara de espectro continuo de 420 a 800 nm obteniendo una diferencia de temperatura entre 2.0 y 2.5°C, y en condiciones ambientales se obtuvo una diferencia de temperatura de 20.0 a 25.0°C.
Modelación de la extracción de polifenoles de semillas de uva
Authors: Cerón-Montes Genaro Iván , Garulo-Fuentes Adriana Lucila , Valencia-Pérez Naella Sandivel , Garrido-Hernández Aristeo , Yáñez-Fernández Jorge
Published: December 2021

Las semillas de uva son un biomaterial vegetal rico en sustancias de alto valor agregado denominadas polifenoles que presentan diferentes beneficios por su capacidad de neutralizar radicales libres evitando el envejecimiento y deterioro prematuro del cuerpo humano. En el procesamiento de la uva para la producción de vino tinto y zumo existe una importante generación de desechos de semillas que pueden ser empleados para obtener polifenoles para la industria alimentaria, farmacéutica y cosmética. Para la recuperación de polifenoles la extracción solido líquido (ESL) es la primera operación de transferencia de masa en el tren de proceso para la recuperación de las sustancias y posterior aislamiento y purificación. Por consiguiente, es conveniente contar con modelos que describan la extracción y pronostiquen los resultados bajo determinadas condiciones de proceso, por esta razón en el presente trabajo se llevo a cabo la modelación de la ESL con la solución de Simpson de la segunda ley de Fick para la difusión anómala (),  el modelo describió el comportamiento del proceso de extracción en las condiciones de operación para optimizar y mejorar la rentabilidad del proceso. Los resultados mostraron una excelente correlación de los datos experimentales con R2> 98% y los parámetros del modelo de la microestructura  y la temperatura ) mostraron describir esta bioseparación y a partir de ellos determinar el tiempo de extracción.
Aplicación del refinamiento Rietveld para la identificación de fases del ZnO obtenido por precipitación química
Authors: Landeros-Velázquez Víctor Iván , Herrera-Pérez Gabriel , Vargas-Bernal Rafael , Ramos-Ramírez Esthela
Published: December 2021

El óxido de zinc (ZnO), es un material semiconductor del tipo II-VI, el cual posee una energía de banda prohibida (Ebp) de 3.37 eV a 298.15 K y la estructura cristalina termodinámicamente más estable es la del tipo de la wurtzita (hexagonal). Con estas características, el ZnO es un candidato excelente para múltiples aplicaciones industriales tales como; la electrónica, magnética, fotocatalítica, optoelectrónica, metalúrgica, alimentaria, cosmética, farmacológica, cerámica, polimérica y muchas otras más. En el presente trabajo, se identificaron y cuantificaron las fases cristalinas presentes en muestras sólidas obtenidas por precipitación química, considerando la relación estequiométrica en medio alcalino. Para el análisis de las fases cristalinas presentes en los sólidos obtenidos se empleó la técnica de Difracción de rayos-X (DRX), los difractogramas se obtuvieron en un intervalo de 4 a 90 de 2θ, a una velocidad de paso de 0.02y de la aplicación del método de Refinamiento Rietveld se llevó a cabo con el empleo del software Materials Using Diffraction Analysis (MAUD). Los resultados cualitativos permitieron considerar la presencia predominante de fase wurtzita (ZnO), la smithsonita (ZnCO3), hidróxido de zinc (Zn(OH)2) y acetato de zinc (ZnC4H6O4). Los resultados del refinamiento permitieron identificar la presencia de fases secundarias de ZnO en estos sólidos, tales como la estructura de roca de sal (halita) y la blenda de zinc.
TÜRKİYE’DE E-FATURA UYGULAMASININ MÜKELLEFLER AÇISINDAN DEĞERLENDİRİLMESİ
Authors: DEMİRKAYA Gülfidan , ÇELİKKAYA Ali
Published: December 2021

Ticari hayatta kullanılan en önemli ticari belge olan fatura, dijitalleşme ile birlikte elektronik ortama taşınmıştır. E-Fatura; maliyet ve zaman avantajı sağlaması, kolaylık, vergi kayıp ve kaçakların önlenmesi ve çevre dostu bir yaklaşım sunmak gibi birtakım sebeplerle, ticari hayatta her geçen gün daha fazla tercih edilmektedir. Bununla birlikte, henüz çok yeni olması dolayısıyla, mükellefler başlangıçta bu yeni duruma uyum sağlamada birtakım sorunlarla karşılaşmıştır. E-Fatura uygulamasında bugün gelinen nokta oldukça önemli olmakla birlikte, mükelleflerin yeni sürece uyumunda temel bazı sorunlar halen sürmektedir. Bu çalışmada, mükelleflerin e-Faturaya geçişte yaşadığı temel sorunlar (e-Faturaya ilişkin özelge ve tebliğlerin yorumlanması ile teknik ve sistemsel sorunlar başta olmak üzere) ele alınmakta ve bu sorunların çözümüne yönelik birtakım önerilere yer verilmektedir.
HEDGE TRANSACTIONS, TAXATION, AND ACCOUNTING IN THE NATURAL GAS TRADE IN THE TURKISH ENERGY SECTOR
Authors: ÇELENK Hakan , BOZLAK Ercan
Published: December 2021

Due to its significant advantages, natural gas, which forms an increasing share of world energy resources, has become one of the important energy resources worldwide. When natural gas prices are analyzed around the world, it is seen that the price formulas depend on petroleum products. Natural gas prices are increasing in proportion to the price increase in petroleum products. There is a simultaneous change in the same direction between oil prices and exchange rates. Natural gas prices are also determined depending on oil prices substantially in Turkey. Therefore, a hedging mechanism should be implemented against fluctuations in oil prices. Thus, the effect of prices on natural gas cost is reduced and the costs are controlled within a certain band interval or fixed by a single price. In this study, firstly the hedging of natural gas prices is explained with an example application. Then taxation processes of the natural gas trade and accounting records including taxation processes are presented. Herein, a guiding resource has been created for both real sector actors in the natural gas business and academics who plan to design an academic study on this subject.
KİLİT DENETİM KONULARI VE COSO İLKELERİ: SEKTÖREL KARŞILAŞTIRMA
Authors: TEZ Berna , GÜCENME GENÇOĞLU Ümit
Published: December 2021

Kilit denetim konuları ile işletmelerin iç kontrol yapıları arasında kuvvetli bir ilişki olduğu düşünülmektedir. Çalışmada amaç, bu ilişkinin sektörel olarak farklılık gösterip göstermediğini ortaya koymaktır. Bunun için; kilit denetim konularının ve bu konulara etki eden muhtemel iç kontrol eksikliklerinin sektörel karşılaştırmasını yapmak ve ilgili eksikliklerin ortaya çıkmasında işletmeler tarafından etkin uygulanmadığı düşünülen COSO ilkelerini tespit etmek alt amaçlar olarak belirlenmiştir. Araştırma kapsamında; enerji, gıda, otomotiv, inşaat ve turizm sektörleri olmak üzere Borsa İstanbul A.Ş’de işlem gören 45 işletmenin 2017, 2018, 2019 yılı bağımsız denetim raporları, nitel veri analizi yöntemlerinden içerik analizi kullanılarak incelenmiştir. Sonuç olarak, işletmelerin iç kontrol sistemleri ile kilit denetim konuları arasında kuvvetli bir ilişki olduğu ve sektörlerin yapısal özelliklerine bağlı olarak farklılıklar arz ettiği tespit edilmiştir. Bunun yanı sıra; yanlış/eksik/hatalı veri kullanımı, yetkin olmayan personel, sistematik süreç kontrolü ve değerlendirmesinin yapılmaması olarak ifade edilen iç kontrol eksikliklerinin sektörler genelinde ortak olduğu belirlenmiştir. Suiistimal risklerinin değerlendirilmesi ile ilgili COSO ilkesinin ise, işletmeler tarafından etkin uygulanamayan en önemli ilke olduğu yargısına varılmıştır.
BIPOLAR PLATES FOR ELECTROLYZERS AND FUEL CELLS – HOW INNOVATION MANAGEMENT IS AS A BASIS FOR SUCCESS THESE COMPONENTS
Authors: Hickmann Thorsten
Published: December 2021

An almost abrupt change in attitude towards applications in the field of renewable energies has emerged in recent months, both among decision-makers in politics and in companies. [1]

In particular, the topic of hydrogen production by electrolysis plays an eminently important role. In water electrolysis, water is split into its constituent ¬parts hydrogen and oxygen using electrical energy. The resulting hydrogen is of interest to future energy systems for a number of reasons, including the fact that hydrogen can serve as a storage medium for electrical energy from renewable energy conversion systems such as photovoltaic or wind turbines.
KARAKTERISASI BERBASIS MARKA MOLEKULER ITS2 TERHADAP SUB-SPESIES KOMPLEKS Anopheles vagus vagus DAN Anopheles vagus limosus
Authors: Senjarini Kartika , Hasanah Lailly Nur Uswatul , Septianasari Miatin Alvin , Abdullah Muhammad Khalid , Oktarianti Rike , Wathon Syubbanul
Published: December 2021

The presence of intraspecies variations of An. vagus later categorized as the subspecies of An. vagus vagus and An. vagus limosus, could be an obstacle to the identification process, which is an important step for malaria vector’s competence characterization. Based on morphological identification, those subspecies could be distinguished by the presences of pale scales in prehumeral and pale bands  in proboscis. The objective of this research was to compare subspecies complexes of An. vagus morphologically and molecularly using Internal Transcribed Spacer 2 (ITS2). Anopheles samples were collected from Bangsring, Banyuwangi. Their phylogenetic tree was constructed by using NJ method based on their ITS2 sequences. BLAST result showed that An. vagus vagus and An. vagus limosus were similar to An. vagus FJ654649.1 from East Java Indonesia and East Timor based on its 99% homology and their molecular distance. The Neighbour Joining (NJ) tree grouped those subspecies in one clade with a boostrap value of 82%. This subspeciation might be due to the different rates of evolution. ITS2 sequences of An. vagus vagus and An. vagus limosus were submitted to GenBank with the accession number of MW314227.1 and MW319822.1, respectively.
Kemunculan variasi intraspesies An. vagus yang kemudian dikategorikan sebagai subspesies An. vagus vagus dan An. vagus limosus menjadi kendala dalam proses identifikasi yang merupakan langkah penting dalam menentukan kompetensi vektor malaria. Berdasarkan karakter morfologi, subspesies tersebut dibedakan dengan adanya sisik pucat pada bagian prehumeral dan pita pucat pada probosis. Penelitian ini bertujuan untuk membandingkan subspesies An. vagus secara morfologis dan molekuler menggunakan Internal Transcribed Spacer 2 (ITS2). Nyamuk Anopheles didapatkan dari Bangsring, Banyuwangi. Konstruksi pohon filogeni dilakukan berdasarkan sekuen ITS2 yang dianalisis menggunakan metode NJ. Hasil BLAST menunjukkan, ITS2 An. vagus vagus dan An. vagus limosus memiliki tingkat homologi 99% dan jarak evolusi molekuler terendah dengan An. vagus FJ654649.1 dari Jawa Timur Indonesia dan Timor Timur. Pohon NJ mengelompokkan subspesies tersebut dalam satu klade dengan nilai boostrap 82%. Hal ini dapat terjadi karena perbedaan kecepatan evolusi yang memungkinkan terjadinya subspesiasi. Urutan basa ITS2 dari An. vagus vagus dan An. vagus limosus telah didaftarkan ke GenBank dengan nomor aksesi MW314227.1 dan MW319822.1.
ANALYSIS OF THE FENER GREEK PATRIARCHATE AND THE WESTERN THRACE TURKISH MINORITY
Authors: CANKUT Ayhan
Published: December 2021

The Republic of Turkey about the closure of all private schools that give higher education and do not pass to the state (To the Ministry of National Education) has accepted law in 1971. Although to be clearly stated in the Lausanne Treaty and it allowed staying in Turkey in return for the Patriarchate's non-political activities that was wanted to use the Patriarchate as a tool in foreign policy by the United States of America (USA) against the Russian Orthodox Church begun to follow different political system after World War II. The aim of these works in Istanbul, the first step was to constitute a similar independent Vatican model in İstanbul by taking Patriarchate outside the Turkish legal legislation. On the other hand, Greece sees the Turkish Minority in Western Thrace as a threat to the future of the country, and the Turkish population is tried to be eliminated through forced migration and assimilation. In this study, the Greek Government, on the one hand, wants to bring “ecumenical” to the Patriarchate with privileges and a fait accompli for the Patriarchate, other hands against the Western Thrace Turks, who could not even elect their religious representatives, refrained from giving the gains that Turks gained by the Treaty of Lausanne is subject of this study.
Study of Extraction of Rare Earth Elements from Hard Coal Fly Ash
Authors: ZNAMENÁČKOVÁ Ingrid , DOLINSKÁ Silvia , HREDZÁK Slavomír , ČABLÍK Vladimír , LOVÁS Michal , GEŠPEROVÁ Dana
Published: December 2021

Rare earth elements (REEs) extraction from wastes and/or by-products is alternative possibility of their winning. The occurrence ofREEs, namely 50.1 ppm of La, 100.1 ppm of Ce and 44.3 ppm of Nd was confirmed in solid fly ash samples from the coal fired heatingplant (TEKO, Inc. Košice, eastern Slovakia). The submitted contribution presents laboratory results of REEs leaching from coal fly ashusing 3M HCl, HNO3, H2SO4 and H3PO4 at 80°C during 120 min.It was found, that recoveries 65.5% of La, 64.4% Ce and 64.3% of Nd into liquor may be attained after grain size reduction to below5 μm.
DEVELOPMENT Pengembangan Sistem Brooder Berbahan Dasar Uap Bensin sebagai Upaya Menekan Biaya Operasional Budi Daya Ayam Broiler
Authors: Kurriawan Budi Pranata  , Kustyorini Tri Ida Wahyu , Sulistyanto Muhammad Priyono Tri , Ghufron Muhammad , Sholikhan Sholikhan , Susilo Djoko Adi
Published: December 2021

Broiler chicken is one of popular alternative source of protein for local people in Indonesia due to the low price and good quality meat. However, broiler breeders unable obtain enough income because face high operating costs due to the animal feed and high consumption of LPG gas in the Day Old Chick (DOC) brooder process. During 15 days brooder DOC process, at least 36 kg/day of LPG gas is consumed for 3000 chicks. Therefore, the purpose of this community service activity is to reduce brooder DOC operational costs for broilers through research, development and implement an alternative heaters using gasoline vapor vaporization. Community service activities are carried out with six stages of activity, namely 1. Real identification of the brooder process in the field 2. Factor analysis using a causes and effects table 3. Improvement of brooder management procedures 4. Conduct an alternative low cost brooder design 5. Investigation of the fabricated brooder sistem and 6. Analysis of the results of the change impact test. The results of the high operational cost DOC process investigation are tight less of the brooder DOC curtain cage, uncontrolled the intensity of the flames, and unfixed of LPG price. The new procedure proposed is fixing the brooder DOC curtain cage, new setting intensity of the flames in day and night, and using an alternative low cost brooder design to avoid unfixed LPG gas price. The proposed procedure is able to reduce brooder operational costs by up to 50%.
A IDENTIDADE PROFISSIONAL DE COORDENADORES PEDAGÓGICOS: TENSÕES E DESAFIOS
Authors: Lima de SANTANA Kamila , Maria MARTINS Ângela
Published: December 2021

Este artigo integra investigação maior que problematizou a implementação de um Programa denominado Sistema de Gestão Pedagógica, no contexto do trabalho da coordenação pedagógica na Rede Municipal de Ensino de São Paulo. Tem como propósito discutir a relação entre a institucionalização do recurso tecnológico e a constituição da identidade profissional de coordenadores pedagógicos. A fundamentação teórica está ancorada nos estudos sociológicos sobre identidade profissional. A pesquisa, de caráter qualitativo, lançou mão da análise de fontes documentais, da observação participante, e da realização de entrevista compreensiva para desvelar o fenômeno investigado. O foco deste artigo está nas etapas desenvolvidas no campo de pesquisa. A inclusão do Programa no trabalho dos coordenadores pedagógicos revela novas possibilidades de atuação profissional, repercutindo assim, na (re) construção da identidade profissional.
PENGARUH PERBEDAAN WARNA WADAH PADA PERFORMA PRODUKSI IKAN KOI (Cyprinus carpio)
Authors: Jalila Riza Sofia , Scabra Andre Rachmat , Cokrowati Nunik
Published: December 2021

Nilai jual ikan koi dapat dilihat dari kualitas warna dan bentuk tubuh nya. Menurut Putriana et al., (2015), keriteria pemilihan ikan koi yang baik adalah memiliki bentuk tubuh yang ideal, warna yang cemerlang, dan kontras tanpa ada gradasi warna atau bayangan. Tujuan penelitian ini adalah untuk mengetahui pengaruh warna wadah terhadap peningkatan kualitas warna ikan koi (Cyprinus carpio), pertumbuhan ikan koi (Cyprinus carpio) dan kelangsungan hidup ikan koi (Cyprinus carpio). Penelitian menggunakan metode eksperimental dengan Rancangan Acak Lengkap (RAL) yang meliputi 5 perlakuan warna wadah yang berbeda, yaitu Kontrol (transparan), merah, kuning, putih dan hitam. Data yang diperoleh ditabulasi pada Microsoft Excel, kemudian di analisis secara statistik menggunakan software SPSS. Hasil penelitian menunjukkan bahwa perlakuan yang diterapkan memberikan pengaruh nyata terhadap pertumbuhan, namun tidak berbeda nyata pada tingkat kelangsungan hidup ikan koi, dan peningkatan kualitas warna. Nilai pertumbuhan tertinggi terdapat pada perlakuan hitam (H) yaitu pada pertumbuhan berat mutlak (PBM) 12,9±0,6b g.
Algumas distinções necessárias na leitura do documento sobre a Teologia da Libertação
Authors: Cavazzuti Tomás
Published: December 2021

O Documento da Sagrada Congregação para a Doutrina da Fé sobre alguns aspectos da Teologia da Libertação reafirma, de forma enfática, a posição da Igreja frente à situação de injustiça que caracteriza sobretudo os nossos países latino- americanos. «O escândalo das gritantes desigualdades entre ricos e pobres — quer se trate de desigualdade entre países ricos e países pobres, ou de desigualdade entre camadas sociais dentro de um mesmo território nacional — já não é tolerado. De um lado, atingiu-se uma abundância jamais vista até agora, que favorece o desperdício, e, de outro lado, vive-se ainda uma situação de indigência marcada pela privação dos bens de primeira necessidade, de modo que já não se conta mais o número das vitimas da subnutrição» (1.6)...