bluuebunny/crossref_metadata_2025 huggingface dataset:
ULOGA INDUSTRIJE U EKONOMSKOM RAZVOJU SRBIJE
Authors: Savic Ljubodrag , Micic Vladimir
Published: August 2021

Više od sedam decenija industrija ima veoma važnu ulogu u ekonomskom razvoju Srbije. Model razvoja i neefikasna tranzicija, posebno privatizacija, doveli su do prevremene deindustrijalizacije. Tranzicioni proces u srpskoj industriji nije stvorio konkurentnu strukturu, koja bi mogla doprineti održivom ekonomskom razvoju. Predmet istraživanja u ovom radu je analiza uloge industrijalizacije u ekonomskom razvoju Srbije. Cilj istraživanja je da oceni razvoj industrije, naročito posle 2000. godine i ukaže na značaj efikasnijeg sprovođenja reindustrijalizacije za održivi ekonomski razvoj, kao sredstva uspešne realizacije brojnih ciljeva, a u vreme kada proces digitalizacije i brzih tehnoloških inovacija u industriji svakodnevno menjaju društveno-ekonomsku realnost. U istraživanju su korišćene vremenske serije i komparativna analiza kao osnovni metodološki pristup. S obzirom da je u toku Četvrta industrijska revolucija i da je „Industrija 4.0“ pokretač i nosilac konkurentnosti i održivog ekonomskog razvoja, centralno istraživačko pitanje jeste zašto je u Srbiji neophodno sprovesti ponovnu intenzivniju reindustrijalizaciju. Rezultati istraživanja pokazuju da reindustrijalizacija treba da rezultira strukturnim promenama i tehnološki inovativnim industrijama. Pored industrijskog razvoja, to bi uticalo na rast, zaposlenost, konkurentnost i izvoz.
Violencia laboral. Análisis de los factores de riesgo y consecuencias en la vida de las mujeres trabajadoras en la Ciudad de México
Authors:   Universidad Nacional Autónoma de México, Cruz-Arroyo Vianney Berenice , Casique-Rodríguez Irene ,   Universidad Nacional Autónoma de México
Published: August 2021

Este artículo analiza la prevalencia de cuatro tipos de violencia contra las mujeres que se presen- tan en el ámbito laboral, enuncia algunos factores de riesgo asociados con la presencia de tales situaciones violentas y explora la posible conjunción entre las experiencias de violencia laboral y la severidad de algunos padecimientos físicos o psicológicos que presentan mujeres trabajadoras en la Ciudad de México. El artículo está basado en los resultados de una encuesta aplicada a una muestra intencional, no probabilística, de mujeres trabajadoras en empresas e instituciones gubernamentales estatales y federales en la Ciudad de México.
La brecha de género en las pensiones en España y la Unión Europea
Authors:   Universidad de Murcia, López-Martínez María , Marín-López Blas Ángel ,   Universidad de Alicante
Published: August 2021

Las pensiones tienen como objetivo asegurar, mediante una retribución de carácter pecuniario, el mantenimiento de un nivel de vida digno en la etapa de retiro. Sin embargo, las de tipo contri- butivo se ven afectadas por las desigualdades entre hombres y mujeres que se van acumulando a lo largo de la vida laboral, dando como resultado otra inequidad: la brecha de género en las pensiones. Este trabajo pretende identificar los factores que inciden en esta diferencia, motivada por la menor implicación de la mujer en el mercado laboral, que se manifiesta tanto en una menor participación femenina en la fuerza de trabajo como en una elevada presencia de este colectivo en el empleo a tiempo parcial y la consiguiente mayor propensión a la intermitencia en la vida laboral de la mujer.
Hogares indígenas y remesas en México: cambios en la década 2000-2010
Authors:   Universidad Nacional Autónoma de México, Lozano-Ascencio Fernando , Ramírez-García Telésforo ,   Universidad Nacional Autónoma de México
Published: August 2021

Este artículo presenta un análisis de los hogares indígenas receptores de remesas en México. Por un lado, se da cuenta del volumen, distribución territorial y características sociodemográficas de los hogares indígenas receptores de remesas. Y por otro, se resalta el aporte que las remesas monetarias recibidas por los hogares indígenas tienen en la economía mexicana. Las fuentes de información utilizadas fueron los Censos de Población y Nivienda de 2000 y 2010, la Encuesta Nacional de Ingresos y Gasto de los Hogares (ENIGH) y las estadísticas sobre remesas familiares reportadas por el Banco de México (Banxico). En términos generales, los resultados muestran un incremento de la migración internacional de la población indígena y del número de hogares que recibieron remesas a nivel nacional, en comparación con los hogares con población no indígena.
Historia crítica del FMI
Authors:   Instituto de Investigaciones Económicas, Ugarteche Galarza Oscar
Published: August 2021

El presente Breviario es, entre otros muchos trabajos, producto de años de investigación sobre este tema y comienza con el concepto mismo de lo que es el fondo de estabilización monetario tripartito en los años treinta; pasa revista al Acuerdo de Bretton Woods construido a partir de la preocupación del Tesoro estadounidense sobre la inestabilidad financiera que acompañó la Gran Depresión. Recorre la importancia que tuvo para el Tesoro cuando la Pax american triunfó en 1944 y la decisión del presidente Nixon de cancelar las bases de dicho acuerdo, de forma inconsulta con el FMI en 1971. Terminada la Pax america, se repasa el modo en cómo se convirtió de un entre multilateral a una agencia norte-sur con dos diferentes reglas de juego y termina el libro con la creciente irrelevancia de la institución ante la crisis del 2007 en adelante, ya desprestigiada por sus shocks económicos y sus fracasadas intervenciones en Tailandia (1977) y Argentina (2001).
A 129-level Asymmetrical Cascaded H-Bridge Multilevel Inverter with Reduced Switches and Low THD
Authors: H P Manoj
Published: August 2021

Abstract: The multilevel inverter is a power conversion device which is uses multiple dc sources to provide required alternating current level. It is can be used for medium to high power applications. This paper presents a 129 level asymmetrical cascaded Hbridge multilevel inverter with reduced switching components and higher THD. The proposed inverter uses multiple dc sources with voltage ratio 1:1:2:4:8:16:32. The proposed inverter uses voltage reference technique to control the switching components of the topology. The comparative analysis of 129 level ASCHBMLI and conventional inverter topologies have been presented. The main advantages of the proposed topology is lower switching components, lower losses, and lower THD without the need of filter. MATLAB/SIMULINK software is used to perform simulation and analyse the performance of the proposed topology. Keywords: Multilevel Inverter (MLI), Asymmetrical Cascaded H Bridge Multilevel Inverter (ASCHBMLI), Cascaded H Bridge (CHB), MATLAB, Total Harmonic Distortion (THD).
YUE FENG’S VIEW ON THE HISTORY OF THE ORTHODOX CHURCH
Authors:   AN DE National Chengchi University, DE AN , FADEYEV IVAN A. ,   IVAN A. FADEYEV  Institute of World History of RAS
Published: August 2021

The essay focuses on the life and works of one of the most famous Chinese researchers of Orthodoxy after 1949, the translator and historian Yue Feng (September 1928 - February 22, 2017). His “A History of the Orthodox Church” was the first authoritative study of the history of the Orthodox Church, published in China since the beginning of the “reform and openness” period (Gǎigé kāifàng; 1978 - present days). The article focuses on Yue Feng’s understanding of the history of the Orthodox Church and the features of the doctrine inherent in Orthodoxy which he chose to highlight. The relevance of the research is determined by the fact that to this day there is a significant interest in the study of Orthodoxy in China itself: new research articles are published, dissertations are defended. Unfortunately, even today Yue Feng’s works, widely known in the Chinese-speaking academia, are known only to a small group of sinologists and students of the history of Orthodoxy in China in the Russian academic community...
THE HISTORY OF THE COEXISTENCE OF RELIGIONS AND THE PROSPECTS FOR WORLDVIEW TRADITIONS IN EVENKI SOCIETY
Authors:   ALEXANDER N. VARLAMOV  The Institute for Humanities Research and Indigenous Studies of SB RAS, VARLAMOV ALEXANDER N.
Published: August 2021

The publication deals with the interaction of religions in the Evenki society since the 17th century. The author considers the process of Christianization of various Evenki groups, among whom the spread of the influence of the new religion was significantly different. The reasons for the formal status of the Christian religion among the majority of Evenk groups are outlined. Information about the history of the penetration of Buddhism into the environment of the Evenks of Transbaikalia is given, which is associated with the acquisition of ethnographic traditions of cattle breeding in close cultural relationships with Mongolian groups and clans. The reasons for the loss of the traditions of Evenk shamanism, associated with the repressive state policy in the 1930-40s, are indicated and the degradation of the cultural traditions of the ethnos in the second half of the 20th century. The article presents a picture of worldview and religious preferences in modern Evenk society, characterized by the coexistence of atheistic, Christian, Buddhist, and pagan (shamanic) views...
RELIGIOUS IDENTITY: “US” AND “THEM” AS GLOBAL, LOCAL, AND GLOCAL (BELARUS, GERMANY, RUSSIA)
Authors:   EVGENIY I. ARININ  Vladimir State University, ARININ EVGENIY I. , BENDIN ALEXANDER YU. ,   ALEXANDER YU. BENDIN Belarusian State University, MARKOVA NATALIA M. ,   NATALIA M. MARKOVA Vladimir State University, MATUSHANSKAYA YULIA G. ,   YULIA G. MATUSHANSKAYA Kazan Federal University
Published: August 2021

The history of the 19th and 20th centuries has highlighted a number of specific aspects of the phenomenon of religious identity, the roots of which can be traced back to the Reformation. The “language of respondents” (“language of the first order”) and “language of experts” (“language of the second order”) are distinguished, differing as observation of reality and observation of observers of reality. The study analyzes ideas about “us”, “them”, global, local, and glocal on materials from Belarus and Russia in comparison with materials from Germany. The article considers alternative forms of personal and group identification, which have gone through a number of historical stages of their relationships, having retained their significance to the present time, often interpreted as a relationship of absolute “good” with absolute “evil”, while in one case one religion is “good”, and in a friend - another.
New Occurrence of Atlantic Tripletail, Lobotes surinamensis (Bloch, 1790) from the Turkish Part of the Aegean Sea, with Biological Notes
Authors: Daban İsmail Burak , Cabbar Koray
Published: August 2021

A new record of Lobotes surinamensis (Bloch, 1790) around Saros Bay, North Aegean Sea is presented, based on a single hermaphrodite specimen with detailed biological information. On 12 June 2018, the specimen was captured by fishermen with gillnets at a depth of 25 m. Sex, age, and stomach content were determined. This new record proves the Northernmost distribution of the species in the Turkish part of the Aegean Sea.
Motivación de Estudiantes de Ingeniería en Informática con Énfasis en Ingeniería de Software: Un estudio en Universidades Latinoamericanas
Authors: Anaya Hernández Raquel , Tumino Marisa Cecilia , Niño Manrique Jhon Fredy , Bournissen Juan , Arboleda Mazo Walter Hugo
Published: August 2021

El estudio de la motivación de los futuros profesionales de desarrollo de software es de vital importanciateniendo en cuenta el fenómeno de alta demanda no satisfecha de estos profesionales y la responsabilidad de la academia de propender por un proceso de enseñanza-aprendizaje significativo y activo que logre comprometer positivamente a los estudiantes. Los objetivos contemplados fueron: a) identificar los aspectos que inciden en la motivación de los estudiantes de informática con énfasis en el área de la ingeniería de software; b) comprobar la fiabilidad y validez del instrumento elaborado; c) identificar los niveles de motivación de la población estudiada. Para el logro de estos objetivos, se diseñó y validó un nuevo instrumento y se realizó el análisis de datos en dos fases para obtener una estructura de factores y subfactores que den cuenta del nivel de motivación. En la primera fase del análisis se obtuvo un modelo estadístico de cuatro factores (atributos de desempeño; relaciones con estudiantes y docentes; desempeño de los docentes; recursos físicos y virtuales) que explican el 71,5 % de la variabilidad. En la segunda fase del análisis se refinó el modelo para identificar los subfactores que lo componen, con lo que se logró un alto nivel de confiabilidad. En cuanto a atributos de desempeño, se evidencia la necesidad de ayudar a los estudiantes a manejar su tiempo; las estrategias pedagógicas muestran poder predictivo sobre la motivación de los estudiantes en el área de ingeniería de software. Se concluye que la estructura de factores y subfactores obtenida con un alto nivel de confiabilidad sirvió como punto de partida para identificar acciones de mejora en las instituciones autoras del artículo; la fiabilidad y validez del instrumento lo perfilan como candidato para ser aplicado en programas similares de otras instituciones.
Featural-visual Indexicality and Sound-shape Congruency in a Phonologically Engineered Alphabet
Authors: M.A. Marcia S. Suzuki,
Published: August 2021

The term uniskript was coined to refer to a class of
phonologically engineered alphabets that employ visual-featural
indexicality combined with sound-shape congruency to represent speech.
In this working paper, I introduce the uniskript methodology, an
alphabet generator technique that uses indices instead
of symbols to represent the flow of speech. I refer to the
Peircean theory of signs to explain the crucial semiotic distinction
between uniskript and the traditional alphabets: in uniskript,
an icon resembling relevant articulatory features of a given
phoneme is used to index sound to shape. I also indicate how the
findings in sound-symbolism were incorporated into the indices to
facilitate cross-modal correspondences.  I propose that uniskript
indexical nature and sensorial mappings can explain why it is so much
easier to learn than symbolic and sensory incongruent alphabets. I then
briefly discuss how the study of uniskript alphabets can shed some light
on the role of cross-modal correspondences in learning. It can also
bring a deeper understanding of the role of phonology in sound
symbolism. Finally, I refer to some applications of uniskript in the
teaching of literacy and in remediating reading issues and illustrate
the entire concept by introducing a uniskript alphabet developed as a
tool to teach pronunciation in an ESL program.

keywords: uniskript, alphabets, sound symbolism, sound-shape
iconicity, cross-modal congruency, phonology, second language learning,
pronunciation in L2
Some new soliton solutions of time fractional resonant Davey-Stewartson equations
Authors: Ilhan Esin
Published: August 2021

In this study, via the Bernoulli sub-equation, the analytical traveling
wave solution of the (2+1)-dimensional resonant Davey-Stewartson system
is investigated. In the beginning, Based on the Riemann-Liouville
fractional derivative, the time-fractional imaginary (2+1)-dimensional
resonant Davey-Stewatson equation by using travelling wave is changed
into a nonlinear differential system. The homogeneous balance method
between the highest power terms and the highest derivative of the
ordinary differential equation is authorized on the resultant outcome
equation, and finally, the ordinary differential equations are solved to
obtain some new exact solutions. Different cases, as well as different
values of physical constants to investigate the optical soliton
solutions of the resulting system, are used. The outcomes results of
this study are shown in 3D dimensions graphically via Wolfram
Mathematica Package.
Polemik Qirā’ah Sab’ah Antara Zamakhsharī dan Abū Ḥayyān
Authors: Nawawi Fuad
Published: August 2021

Tulisan ini menunjukkan bahwa tradisi, jaringan sosial budaya, ideologi, dan kepentingan membentuk cara pandang terhadap pengetahuan, termasuk pengetahuan tentang qirā’āt sab‘ah. Az-Zamakhsyarī (w. 538 H/ 1143) kritis terhadap qirā’āt sab‘ah karena ia berlatar belakang muktazilah yang menilai bahwa sebagianragam bacaan qirā’āt sab‘ah merupakan produk ijtihad ulama. Muktazilah juga beranggapan bahwa tidak semua qiraah merupakan bagian dari Al-Qur’an. AzZamakhsyarī juga berpihak kepada mazhab nahwu Basrah yang memposisikan kaidah bahasa sebagai “hakim” yang menentukan. Jika ada qiraah yang tidak sesuai kaidah, qiraah tersebut dihukumi sebagai qiraah syāż. Di pihak lain, Abū Ḥayyān (w. 745 H/ 1344) membela qirā’āt sab‘ah karena Abū Ḥayyān berlatar belakang Asy‘ariyyah. Aliran teologi ini menilai qirā’āt sab‘ah sebagai qiraah mutawatir sehingga tabu untuk dikritik. Abū Ḥayyān berpihak kepada mazhab nahwu Kufah yang menilai apa pun yang berasal dari ungkapan orang Arab—tak terkecuali qirā’āt sab‘ah—diterima sebagai sumber bahasa, meskipun pada mulanya berbeda dengan kaidah umum
C-V and I-V characterisation of CdS/CdTe thin film solar cell using defect density model
Authors: Pal Debashish , Das Soumee
Published: August 2021

This paper presents a detailed study of the current-voltage (I-V) and
capacitance-voltage (C-V) measurements made on a CdS/CdTe based solar cell
by numerical modeling. Implementation of the simulated cell having a
superstrate configuration was done with the help of SCAPS program using
defect density model. The I-V characterisation includes window and absorber
layer optimisation based on various factors including the impurity doping
concentration, thickness and defect density. The energy band diagram,
spectral response and currentvoltage plot of the optimised cell
configuration are shown. C-V characterisation (Mott-Schottky analysis) of
the solar cell is conducted at different low frequencies to determine the
flatband potential, carrier concentration and to validate the reliability of
the results. The optimum device performance was obtained when the active
layer was 2 ?m thick with a doping level of 1?1015/cm3.
Exploring Antecedents of Peoples' Intentions to Use Smart Services in a Smart City Environment: An Extended UTAUT Model
Authors: Jena R. K.
Published: August 2021

The Indian government is currently developing scalable and sustainable smart city infrastructures to address the urbanization problem in India. However, the smart city project will only be successful if the people accept and use smart services. Therefore, this study investigates peoples' acceptance of smart services using a modified unified theory of acceptance and use of technology model (UTAUT). The results demonstrate that performance expectancy, effort expectancy, and attitude are significant factors in peoples' usage intention toward smart services. Furthermore, the study tested the moderating effect of task-technology fit and perceived risk on the relationship between performance expectancy, effort expectancy, and attitude and usage intention. The study's findings will help decision-makers and professional accountants to understand and implement robust accounting processes responsible for selecting the right digital tools for the right reasons to enhance peoples' usage intention in a smart city environment.
Big Data Analytics in IRS Audit Procedures and Its Effects on Tax Compliance: A Moderated Mediation Analysis
Authors: Neuman Erica L. , Sheu Robert J.
Published: August 2021

Big Data analytics could be a panacea for the IRS by enabling creation of taxpayer profiles to better capture noncompliance using artificial intelligence and machine learning, requiring fewer costly manpower hours. Privacy, fair information practices, and embedded biases are critiques of such practices, and it is unknown how taxpayers will respond. Deterrence theory suggests improved audit effectiveness will increase compliance but excludes elements of tax morale, including perceived fairness. We find evidence supporting a moderated mediation model where procedural fairness mediates the relationship between audit procedures and tax compliance, moderated by participatory monitoring, which captures how effects vary when taxpayers willingly increase traceability of their income by advertising online. When taxpayers advertise business online, use of advanced technologies in audit selection significantly increases compliance with no significant effect on perceived fairness; when they do not, use of advanced technologies has no effect on compliance, but significantly decreases perceived fairness.
Restricted Stock is on the Rise: What Does this Mean for Whistleblowing?
Authors: Scheetz Andrea M , Wall Joseph , Wilson Aaron B.
Published: August 2021

The use of restricted stock to supplement compensation or to give a bonus to executives is on the rise. Research finds that private company employees are less likely to whistleblow than public company employees. Further, restricted stock may positively influence whistleblowing when large financial rewards are present, and vesting period and strike price influence whistleblowing for those with stock option compensation. Yet, there is limited investigation of whistleblowing related to the vesting period of the restricted stock and the type of organization granting this compensation. We find evidence of a significant interaction effect. For those in public companies, whistleblowing tends to increase with a longer vesting period, whereas those in private companies have the opposite behavior, as whistleblowing increases with shorter vesting periods of the restricted stock compensation. The lens of agency theory focused on whistleblowing theory helps resolve this seeming juxtaposition. Implications for practice and policy are offered.
Holdautók és marsjárók : II. rész
Authors: Both Előd
Published: August 2021

Az ember régi vágya, hogy a földfelszínhez hasonlóan más égitestek felszínén is alkalmazhasson hatékony közlekedési eszközöket, elősegítve az adott tudományos küldetés célját, a felszín térképezését, a mintagyűjtést. 1971 óta számos alkalommal használtak ember vezette járművet a Hold felszínén, de számos robotjármű is tevékenykedett a Holdon, sőt a Marson is. A félévszázados évforduló alkalmából a szerző tanulmányának első részében felidézte az idegen égitestekre eddig eljutott járművek történetét. A magyar vonatkozások okán kitért az Apollo-programban használt holdjáróra is. A tanulmány folytatásában a szerző bemutatja a kínai űrkutatás eredményeit, a Mars kutatására tervezett eszközöket és a közeljövő terveit.
A gammakitörések irány szerinti eloszlása
Authors: Horváth István
Published: August 2021

A gammakitörések a Világegyetem legnagyobb energiájú folyamatai. Többségükben nagy tömegű csillagok végső robbanásai távoli galaxisokban, illetve azok közelében. Tehát nagyon távoli tartományokban jelzik a Világegyetem sűrűbb részeit. Éppen ezért segítségükkel alkalmunk lehet felderíteni világunk nagy léptékű szerkezetét.
PRODUCCIÓN DE BIODIESEL A PARTIR DE ACEITE CRUDO DE PALMA (Elaeis guineensis), PARA SU USO COMO FASE CONTINUA EN FLUIDOS DE PERFORACIÓN
Authors: Vega M. Rubén D. , Muñoz D. Rocielys del V. , Chettick S. Yexander J.
Published: August 2021

El uso de aceites como fase continua en fluidos de perforación conllevó al desarrollo de un fluido a partir de aceite crudo de palma (Elaeis guineensis). Para ello, fue necesario aplicar un proceso de transesterificación para obtener un éster o biodiésel. Al ser caracterizado, este cumplió con la norma ASTM B100, excepto por la viscosidad cinemática (6,38 cSt), la cual superó el valor máximo regulado. Asimismo, presentó un espectro IR típico de un biodiesel de palma lo que confirmó la calidad del biodiesel obtenido aplicando metanólisis ácida y básica. Seguidamente, se formuló un fluido de perforación con una densidad de 1437,92 kg/m3 y se sometió a un proceso de envejecimiento dinámico a 121,1 ºC (250 °F) y 1,38 MPa (200 psi). El fluido resultante demostró tener mejores propiedades físicas que fluidos de igual densidad como el Vassa y el gasoil. Finalmente, se estudió su comportamiento al reducir e incrementar la temperatura en 27,7°C con respecto a la temperatura de envejecimiento inicial, presentando un funcionamiento ideal a las menores temperaturas (93,3 y 121,1 ºC), pero una degradación térmica a 148,8 °C, lo que lo convierte en no funcional a esa temperatura.
CLOUD ATTENUATION AT Ka, Q AND W BANDS BASED ON RADIOSOUNDINGS DURING RAINY AND NON-RAINY SEASONS IN CENTRAL ANDES: A STUDY IN EL ALTO, BOLIVIA
Authors: Garcia Alejandro , Siles Gustavo , Arciénega Juan Pablo , Balderrama Yasmin
Published: August 2021

Cloud attenuation in satellite communication systems becomes a relevant issue as the frequency increases, and thus, it has to be taken into account when link availability is being calculated. This atmospheric impairment is a variable atmospheric phenomenon whose characterization has to be done not only on a yearly-basis but also on a seasonal and monthly basis. In the present paper, cloud attenuation statistics are reported at 20 GHz, 40 GHz and 75 GHz during rainy and non-rainy seasons in El Alto, Bolivia, at 4065 m of altitude, using 3 years of radiosoundings (2016-2019). Cloud detection models have been used for the calculations, including Salonen, Salonen08, Decker and CldMod models, and results obtained are compared to those given by the global model of the ITU-R Rec. P.840. The results lead to conclude that zenith cloud attenuation during rainy season can reach maximum values between 0.15 and 0.45 dB (20 GHz), 0.55 and 1.5 dB (40 GHz), and 1.3 and 3.9 dB (75 GHz) depending on the model to be used. In comparison, during non-rainy season these values vary between 0.08 and 0.33 dB (20 GHz), 0.26 and 1.1 dB (40 GHz), and 0.62 and 2.6 dB (75 GHz). On the other hand, statistics based on CldMod model and, in a less extent, Decker model are close to the ones obtained using the ITU-R global model. These observations could open the possibility of further studies assessing the reliability of meteorological parameters in digital maps at high altitude sites, because these data are used in global propagation models.
ANÁLISIS DE RESILIENCIA EN INVERSIONES DE UN SISTEMA DE RIEGO EN BASE A LA COMPARACIÓN DE ESCENARIOS DE CAMBIO CLIMÁTICO
Authors: Azcuña Castro Fabiola , Mejía Vaca Dayana Estela
Published: August 2021

El presente documento refleja un Análisis de Resiliencia en Inversiones (ARI) de un sistema de riego para la Comunidad Cauchi Titiri, de acuerdo a la comparación de escenarios de cambio climático (CCSM4 y MIROC), y un análisis de variabilidad de la temperatura y precipitación, considerando los escenarios de trayectorias de concentración representativas (RCP): 2.6_2020; 4.5_2050 y 8.5_2050. Esta zona presenta inundaciones, sequías, heladas y granizadas; además está situado en un área semi árida, donde existe un nivel medio de amenaza en cuanto a sequías, presentando un alto déficit hídrico. Por consiguiente, se requiere la implementación de un sistema de riego que coadyuve a mejorar el rendimiento de la producción agrícola y garantice la disponibilidad de agua para riego en la zona. Los resultados obtenidos de este análisis indican que existirá un incremento de amenaza de sequías y heladas, considerados como riesgos principales para el ARI. Este análisis está basado en tres módulos de estudio, Análisis de Riesgos, Análisis de Resiliencia Climática y Análisis de Beneficio/Costo, se plantearon medidas de mitigación de exposición al riesgo, como ser, cambiar la ubicación del atajado y fortalecer no sólo las capacidades de limpieza del sistema de riego, sino también la capacidad de atender eventos de cambio climático. Por lo tanto, se logrará una reducción del riesgo del sistema en un 40%, considerando el riesgo actual y el riesgo con incidencia al cambio climático. Por su parte, se alcanzará un costo evitado de Bs. 1.526.668 por pérdidas de reconstrucción y atención a la emergencia.
ESTUDIO COMPARATIVO SOBRE MODELOS DE TURBULENCIA EN FLUJO DE REFRIGERANTES CON BAJO GWP EN EL INTERIOR DE MICROCANALES
Authors: Miranda Eduardo , Sempértegui-Tapia Daniel , Chávez Cristian
Published: August 2021

Este artículo se trata de una evaluación de modelos de turbulencia para la predicción de la pérdida de presión y el coeficiente de transferencia de calor durante el flujo de refrigerantes con bajo GWP en el interior de microcanales. En este estudio, características de mecánica de fluidos y transferencia de calor se simulan incorporando condiciones de flujo turbulento en un microcanal circular de 1.1 mm de diámetro. Los modelos de turbulencia con las formulaciones k - ε y k - ω son evaluados para números de Reynolds hasta 10000 y son implementados computacionalmente en el software OpenFoam. Los perfiles de velocidad, factores de fricción y números de Nusselt son calculados y analizados en función de variables paramétricas. Los resultados numéricos son validados con métodos de predicción analíticos y con datos experimentales medidos en trabajos previos para flujos de R134a, R1234fy, R1234ze(E) y R600a. La variación de la caída de presión y coeficiente de transferencia de calor convectivo son analizados de acuerdo al efecto al tipo de fluido y al modelo de turbulencia empleado. Los resultados indican que los modelos describen cualitativamente el comportamiento del flujo y la transferencia de calor en condiciones de turbulencia. Cuantitativamente, los modelos Low-Re k -ε, k - ω estándar y k - ω SST presentan mejores predicciones para las variables de interés. Por otro lado, el modelo Low-Re k - ε presenta el menor error medio absoluto.
MODELAMIENTO KRIGING EN LA TASACIÓN DE PRECIOS PREDIALES URBANOS
Authors: Marin Mamani Grover , Cahui Galarza Arnaldo , Gallegos Ramos Julio Rumualdo , Bolívar Espinoza Néstor , Enríquez Mamani Vitaliano
Published: August 2021

En la actualidad la necesidad de obtener un predio urbano para construir una unidad habitacional es imperante. El propósito fue determinar el modelo geoestadístico óptimo para la tasación del precio de lotes urbanos en la ciudad de Puno. La metodología aplicada analizó 145 predios en venta los que se dividieron en cuatro zonas urbanas ubicadas por su rumbo, además se usó análisis estructural de datos para las variables área y precio. Los resultados mostraron el área fue de 90,66 ± 10,63 m2, con respecto a los precios prediales la media fue de 107367,03 ± 18772,30 nuevos soles, la coherencia gráfica del semivariograma para la variable precio es el hole effect con un nivel de confianza de 97,52%.
On the Need to Revise the Rules for the Protection of Structures and Natural Objects from the Harmful Effects of Mining
Authors:   IPСON RAN, Kulibaba S.B. , Fedorov E.V. ,   IPСON RAN
Published: August 2021

Conditions for the coal extraction under the built-up areas and natural objects in the Russian Federation are fully regulated by the Rules for the protection of structures and natural objects from the harmful effect of the underground mining at the coal deposits. Determination of the degree of danger of effecting mining operations on these objects, and the choice of measures for their protection are carried out based on the calculation of the earth surface deformations. The purpose of the work is to develop proposals for the modernization of the current regulatory and methodological document based on the analysis of the compliance of its provisions with the modern conditions of the deposits underground mining. Experience of applying the document under consideration in the modern conditions of the development of coal deposits showed that many of its provisions contain a number of inaccuracies, in particular: ambiguity in determining the boundaries of the zone of dangerous influence of the underground mining; lack of a methodology for predicting the period of damping of the process of earth surface damage after stopping the working face; limited conditions for determining the standard deformation indicators for civil buildings, etc. In addition, in this document, only the underground method of mining coal seams is considered, while the more promising is a combined development, combining underground and open-pit methods. The problem of inconsistency of the current rules provisions with the modern conditions can have a very negative effect on the safe state of the undermined objects. Based on the analysis of the identified shortcomings, a number of proposals for improving the rules was developed. In particular, it was proposed to expand them by including the rules and regulations of the combined method of deposits development. It is also required to update the normative and methodological parts of the document bringing them in line with the modern conditions of deposit development considering the accumulated experience of the objects undermining, and the results of the latest studies of rock mass deformation.
Features of Incidents Investigation during Remote Work
Authors:   Ufa State Petroleum Technical University, Azmetova E.A. , Vadulina N.V. ,   Ufa State Petroleum Technical University
Published: August 2021

The problems of legal regulation of remote work from the point of view of safety and labor protection are considered. During the pandemic, the number of remote employees increased by eight times, and the labor protection of this category of the employees remained at the same level. The Labor Code of the Russian Federation significantly reduces the rights and obligations of both the employer and the remote employee, therefore, the risk of an incident increases. It is difficult to establish a connection specifically between the incident with production activities, and not with the household chores. It is noted that the employers are reluctant to investigate incidents with remote employees. However, an investigation is required since administrative responsibility is provided for concealing an incident. Investigation will help not only to get the employee due compensation but also to prevent future incidents. Several traumatic factors are highlighted related to the home office: sharp corners of the furniture, broken glass, toilets and bathrooms, wet floor, armchair, chair, ceiling cabinets (head injuries), carpets and cables (stumbling), equipment and cables (short circuit), fire, stairs. Presumably, the most frequent occupational diseases associated with the remote work (longer stay behind the computer screen) were identified: dry eye and carpal tunnel syndromes, cardiovascular, gastrointestinal diseases, etc. Recommendations for the prevention of occupational diseases and injuries were proposed: briefings on labor protection, risk assessment at the workplaces, preliminary and periodic medical examinations, an ergonomic working environment, compliance with the work and rest regimes, preservation and (or) documentation of the incident site before the arrival of the commission, etc.
Reliability and Safety of the Gasified Mine Air Heating Points
Authors:   Gas-Engineering LLC, Saplin A.V. , Titaev A.A. ,   UrFU named after The First President of Russia B.N. Yeltsin, Gibadullin Z.R. ,   JSC «Uchalinsky GOK», Kravchenko A.N. ,   The Institute of Mining of Ural Branch of RAS
Published: August 2021

Eighteen years operation experience of gas air heaters RG2000 for Ural mines is considered. Earlier published scientific research, and the accumulated actual data on the safe operation of gas air heating points for mine ventilation are analyzed. Special safety principles are formulated that are used when placing gas equipment near the air supply shafts of the mine. The data obtained over the long years of operation of an innovative technical air heating system were studied related to most important parameters including compliance with the sanitary and hygienic requirements for the mine ventilation air. The results are presented concerning the monitoring of the supply air, which confirm its stable and safe quality. It is noted that the Canadian mining occupational safety and health regulations allow to use direct gas-fired air heaters. The spread of this technology in our country is possible only if the strict Russian sanitary and hygienic requirements for air pollution at the production sites are met. For example, Russian regulations in the field of maximum permissible concentration of the nitrogen oxides are 3–10 times lower than the foreign ones. In this regard, the supply air heaters with direct gas heating cannot be used in Russia for ventilation of the underground workings. The results of a successful solution to the problem of heating mine air using an innovative technology of low-temperature flare impact combustion of a homogeneous methane-air mixture are presented in the article. This approach allows 10-40 times to reduce the ingress of harmful substances into the air supplied to the mine, which fully meets the current hygienic requirements and regulations at the mining enterprises of Russia.
Improvement of the Occupational Safety by Radical Isolation of Pollution Sources during Underground Ore Mining
Authors:   SRSPU (NPI), Golik V.I. ,   GPI VSC RAS, Stas G.V. ,   Tula State University, Liskova M.Yu. ,   PNRPU, Kongar-Syuryun Ch.B. ,   NITU «MISiS»
Published: August 2021

One of the ways to protect the health of the employees in the mining enterprises is the improvement of the mine atmosphere by strengthening safety measures in the underground mining of minerals, especially those that pose a particular hazard. The aim of the study is to develop a technology for the radical protection of the employees from specific pollution. To achieve this goal, a set of tasks is being solved, one of which is the use of technogenic waste as materials for the preparation of hardening filling mixtures. It is experimentally established that the process of increasing the strength of the tailings of various concentration plants is adequate, the structures of which can be used to control the geomechanics of the ore-bearing massif. Classification of the strengthening mixtures that allow to increase strength can occur when unloading from the crushing and grinding mills. Use of tailings for the manufacture of insulating massifs is possible after extracting the remaining metals from them, for example, using one of the leaching methods. Air pollution with specific substances during underground mining of ore deposits can be radically reduced by isolating workings with artificial insulating massifs. Possibility of using tailings for the manufacture of insulating artificial massifs is substantiated experimentally by comparing the capabilities of mills of various types. The issues of atmospheric air pollution during underground mining, mainly of ore deposits, are considered. Quantitative values of hazard for development systems are given. The results of experiments confirming the possibility of using tailings for the manufacture of concrete insulating artificial massifs are presented. Quantitative values are obtained related to the capabilities of mills for obtaining a product of the same size with different granulometric composition of the starting material when used in industry.
Functional States as a Psychological Safety Component of the Offshore Oil Production Platform Employees at the Rotational Labor Organization in the Caspian Sea
Authors:   Northern (Arctic) Federal University named after M.V. Lomonosov, Korneeva Ya.A.
Published: August 2021

The study is devoted to identifying and describing the features of functional states as a component of the employees psychological safety, as well as occupational safety during fly-in-fly-out regime on an offshore oil platform. The scientific expedition worked in April 2019 during the entire fly-in-fly-out visit on the platform in the Caspian Sea. 50 employees took part, whose average age was 36.17 ± 1.064 years, the average work experience by the fly-in-fly-out method was 7.97 ± 0.839 years. The duration of the rotation period is 14 days. Research methods are: hardware psychophysiological and psychological testing. The first ones were used to assess the state: the level of stress (the AngioScan device), the operator efficiency, the level of the functional state and functional reserves (the Psychophysiologist device). For psychological testing, the color test of M. Lusher and the questionnaire of self-assessment of states «Well-being. Activity. Mood» were selected. Statistical analysis of the research results was performed with the help of descriptive statistics and multidimensional methods using IBM SPSS Statistics 23.0 software package. All the employees are divided into two groups according to the individual performance: the first cluster with high performance, the second cluster with reduced performance. As a result of studying the relationship between the efficiency and occupational safety subjective characteristics it was found that employees of the first cluster (with high personal efficiency) are better adapted to the negative environment impact and are characterized by high psychological safety and high occupational safety. Representatives of the second cluster (with reduced personal efficiency) are not satisfied with the work schedule, give higher assessments of hazard of professional situations, but at the same time commit more violations of occupational safety. For these reasons, the employees with reduced efficiency (the second cluster) belong to the risk group, which requires additional measures from the managers to ensure their psychological safety and improve occupational safety at work.
Prevalence of Helicobacter pylori infection and its Associated Risk Factors among symptomatic Residents of Sulaimani city, Kurdistan region, Iraq, 2020
Authors: Ali Seerwan Hama Rashid , Salih Sabiha Sharif , Hama Sour Taib Ahmed , Raouf Goran Mohammad , Rahim Araz Latif
Published: August 2021

Helicobacter pylori (H. pylori) bacteria are a microaerobic Gram negative that colonizes in the gastric and duodenum of human. It can cause prolong infection in the human life if not treated. Many of the studies showed that infection by H. pylori can cause some important gastrointestinal illness, such as peptic ulcer, chronic gastritis, gastric adenocarcinoma and mucosa associated lymphoid tissue lymphoma. Recurrence is generally considered as H. pylori recrudescence infection after one year of eradicated treatment. There are many factors involved in the H pylori reinfection, such as the epidemiology of H. pylori infection, condition of the live, development of economical state, and health conditions. The Objectives of this study were to estimate the incidence and determine the risk factors of infection by H. pylori bacteria in dyspeptic patients in Sulaimani city. And the Aims are to estimate prevalence of the Helicobacter pylori and patients’ characteristics in Sulaimani city. This is a cross-sectional study, using a Urea breath test or stained the gastric sample with Giemsa stain, which is including adult participants aged (12-87) years during the period starting from 1 January until 31 December 2020 on Iraqi male and female patients were visiting –Center for Gastroenterology and Hepatology in Sulaimani, city, Iraq. Three hundred and four patients were included, all of them underwent Urea breath test only but eighty-one of the participants underwent endoscopy and stained the gastric sample with Giemsa stain. Urea breath test for Helicobacter pylori was positive in54.9% which have significant correlation with risk factor findings. Results: the incidence rate of H. pylori infection in our study is 54.9%, and mean age of the study participants was (40.49 ±16.39) one hundred and ninety-one cases 62.8% were female and 113 cases 37.2%were male. Infection by H. pylori bacteria is rife in dyspeptic patients; and is more common in the age group of 31-40 years. One of noninvasive test to diagnosis H. pylori is Urea breath test.  In conclusions the rate of helicobacter pylori infection in our study is 54.9% among the symptomatic patients, and the overall incidence of H. pylori UBT and Giemsa stain detection rate were 73.4 and 26.6% respectively.
Potassium Adsorption Phenomenon in Calcareous Soils of Shahrazur Plain
Authors: Saeed Kamil Sabir
Published: August 2021

A laboratory study for adsorption of potassium (K) determination was conducted on six soils located in Sharazur plain from the Kurdistan Region of Iraq in 2021 using the batch technique method. Potassium (K) adsorption isotherms were achieved by equilibrating 5.0 g of soil samples with eight grades of K (0 to 300 mg L-1) as KCl in 50 ml of 0.01M CaCl2 solution. To match the data of adsorption, Freundlich, Langmuir, and Temkin adsorption isotherms were used. The results show that the amount of adsorbed K ranged between (45.78 to 52.49) % added K. The Freundlich model fit the equilibrium K adsorption data better for the Serwan location of soil (silty loam), as demonstrated by a greater coefficient of determination (R2 =0.90). The value of heterogeneity factor 1/n for the Freundlich model ranged from (0.34 to 0.47) kg mg-1, which was less than one. The sorption processes for all of the studied soils were normal adsorption. The constant of the Langmuir isotherm (KL) aligned from (0.107 to o.425) L mg-1. Smaller KL values mean that more adsorbed K would be transformed to a non-exchangeable form, either through the creation of crystalline K or through ion occultation. The RL values indicate the type of isotherm, the values of RL> 1 that means the adsorption nature to be unfavorable. The Temkin equilibrium binding constant (AT) was high for all studied soils except the soils of Bestan Sur and Grdigo locations, the high value of AT indicates high binding energy. The Temkin constant (bT) ranged from (10.46 to 13.47) J mole-1 that was related to the nature of the adsorption energy, a positive value indicates that the adsorption process is exothermic.
Middle hepatic vein incorporation in live donor liver graft transplantation; implication and safety
Authors: Abdi Mahmoud Ali , Kareem Tayeb Sabir , Hassoun Assad Abidon
Published: August 2021

Background: In this study, we have used the middle hepatic vein with the right lobe, and we studied the venous outflow dynamics immediately after transplant retrospectively meanwhile we studied the impact of the graft function on donor functionality and overall donor safety.  

Method: Between October 2017 to October 2020, we performed 40 adult to adult live donor liver transplants at Zheen International Hospital (Erbil, Kurdistan Region). Postoperative Doppler ultrasound was performed for recipients and donors immediately after surgery and then daily until discharge.   

Results: The donor age (28.5 ± 6.9) year, male/ female 19/ 21, intensive care unit stay (1.2 ± 0.43), floor stay (5.2 ± 1.4) days, their portal vein velocity (43.5 ± 18.4 ml/sec), hepatic artery resistive index (0.6 ± 0.09) and triphasic/ continuous venous outflow 30/10, their postoperative day one and at the discharge total serum bilirubin were  (2.8 ± 1.8) and (2 ± 1.4), their postoperative day one and at the discharge international normalization ratio were (1.7 ± 0.5) and (1.2 ± 0.2) respectively. The recipient age (48.5 ± 11.3), male/female 27/13, intensive care unit stay (4.75 ± 3.9), floor stay (7.7 ± 3.7) days, portal vein velocity (63.96 ± 24.65 ml/sec), hepatic artery peak systolic velocity (74.76 ± 32.85) hepatic artery resistive index (0.7 ± 0.15), and triphasic/continuous venous outflow 27/13.  

Conclusions: Middle hepatic vein incorporation in live donor liver graft is safe with a favorable outcome for recipient and donor, doppler US is one the important tool for evaluation and follow up of donor and recipient for detection of vascular complications and assessment of venous outflow and graft function. In addition, early discharge of the donor is a reasonable option.