bluuebunny/crossref_metadata_2025 huggingface dataset:
Cell-Penetrating Peptides Derived from Animal Venoms and Toxins
Authors: Rádis-Baptista Gandhi
Published: February 2021

Cell-penetrating peptides (CPPs) comprise a class of short polypeptides that possess the ability to selectively interact with the cytoplasmic membrane of certain cell types, translocate across plasma membranes and accumulate in the cell cytoplasm, organelles (e.g., the nucleus and mitochondria) and other subcellular compartments. CPPs are either of natural origin or de novo designed and synthesized from segments and patches of larger proteins or designed by algorithms. With such intrinsic properties, along with membrane permeation, translocation and cellular uptake properties, CPPs can intracellularly convey diverse substances and nanomaterials, such as hydrophilic organic compounds and drugs, macromolecules (nucleic acids and proteins), nanoparticles (nanocrystals and polyplexes), metals and radionuclides, which can be covalently attached via CPP N- and C-terminals or through preparation of CPP complexes. A cumulative number of studies on animal toxins, primarily isolated from the venom of arthropods and snakes, have revealed the cell-penetrating activities of venom peptides and toxins, which can be harnessed for application in biomedicine and pharmaceutical biotechnology. In this review, I aimed to collate examples of peptides from animal venoms and toxic secretions that possess the ability to penetrate diverse types of cells. These venom CPPs have been chemically or structurally modified to enhance cell selectivity, bioavailability and a range of target applications. Herein, examples are listed and discussed, including cysteine-stabilized and linear, α-helical peptides, with cationic and amphipathic character, from the venom of insects (e.g., melittin, anoplin, mastoparans), arachnids (latarcin, lycosin, chlorotoxin, maurocalcine/imperatoxin homologs and wasabi receptor toxin), fish (pardaxins), amphibian (bombesin) and snakes (crotamine and cathelicidins).
The Effectiveness of Dietary Byproduct Antioxidants on Induced CYP Genes Expression and Histological Alteration in Piglets Liver and Kidney Fed with Aflatoxin B1 and Ochratoxin A
Authors: Popescu Roua Gabriela , Bulgaru Cristina , Untea Arabela , Vlassa Mihaela , Filip Miuta , Hermenean Anca , Marin Daniela , Țăranu Ionelia , Georgescu Sergiu Emil , Dinischiotu Anca
Published: February 2021

The purpose of this study was to investigate the potential of a byproduct mixture derived from grapeseed and sea buckthorn oil industry to mitigate the harmful damage produced by ochratoxin A and aflatoxin B1 at hepatic and renal level in piglets after weaning. Forty cross-bred TOPIGS-40 hybrid piglets after weaning were assigned to three experimental groups (E1, E2, E3) and one control group (C), and fed with experimental diets for 30 days. The basal diet was served as a control and contained normal compound feed for starter piglets without mycotoxins. The experimental groups were fed as follows: E1—basal diet plus a mixture (1:1) of two byproducts (grapeseed and sea buckthorn meal); E2—the basal diet experimentally contaminated with mycotoxins (479 ppb OTA and 62ppb AFB1); and E3—basal diet containing 5% of the mixture (1:1) of grapeseed and sea buckthorn meal and contaminated with the mix of OTA and AFB1. After 4 weeks, the animals were slaughtered, and tissue samples were taken from liver and kidney in order to perform gene expression and histological analysis. The gene expression analysis showed that when weaned piglets were fed with contaminated diet, the expression of most analyzed genes was downregulated. Among the CYP450 family, CYP1A2 was the gene with the highest downregulation. According to these results, in liver, we found that mycotoxins induced histomorphological alterations in liver and kidney and had an effect on the expression level of CYP1A2, CYP2A19, CYP2E1, and CYP3A29, but we did not detect important changes in the expression level of CY4A24, MRP2 and GSTA1 genes.
Real Impact of Novel Immunotherapy Drugs in Cancer. The Experience of 10 Last Years
Authors: Koulouris Andreas , Tsagkaris Christos , Nikolaou Michail
Published: February 2021

Intense research on immunotherapy has been conducted during recent years. As advances in the field have started changing the landscape of cancer therapy, it is necessary to assess the impact of immunotherapeutic modalities in the treatment of various cancers. Ten years ago, in 2011, ipilimumab was the first of the newest immunotherapeutic drugs against cancer to be approved by the FDA. Then several drugs followed and formed a therapeutic arsenal to fight cancer. Initial studies were performed on metastatic patients, but there are currently several studies in patients with potentially curable cancers. All these developments have created a new environment for oncology which we will present in this article. This review examines the current evidence related to the impact of immunotherapy on various cancers and discusses its potential clinical and research implications, including its effectiveness in comparison to other treatment modalities (chemotherapy, radiotherapy), its toxicity and prospective research opportunities. While constant updates and further research is critical to understand the impact of immunotherapy in cancer therapy, not only does it seem to be important to assess the current state of knowledge highlighting the success but also to determine the challenging aspects of cancer immunotherapy.
The Role of NK Cells in EBV Infection and EBV-Associated NPC
Authors: Png Yi Tian , Yang Audrey Zhi Yi , Lee Mei Ying , Chua Magdalene Jahn May , Lim Chwee Ming
Published: February 2021

A vast majority of the population worldwide are asymptomatic carriers of Epstein-Barr Virus (EBV). However, some infected individuals eventually develop EBV-related cancers, including Nasopharyngeal Carcinoma (NPC). NPC is one of the most common EBV-associated epithelial cancers, and is highly prevalent in Southern China and Southeast Asia. While NPC is highly sensitive to radiotherapy and chemotherapy, there is a lack of effective and durable treatment among the 15%–30% of patients who subsequently develop recurrent disease. Natural Killer (NK) cells are natural immune lymphocytes that are innately primed against virus-infected cells and nascent aberrant transformed cells. As EBV is found in both virally infected and cancer cells, it is of interest to examine the NK cells’ role in both EBV infection and EBV-associated NPC. Herein, we review the current understanding of how EBV-infected cells are cleared by NK cells, and how EBV can evade NK cell-mediated elimination in the context of type II latency in NPC. Next, we summarize the current literature about NPC and NK cell biology. Finally, we discuss the translational potential of NK cells in NPC. This information will deepen our understanding of host immune interactions with EBV-associated NPC and facilitate development of more effective NK-mediated therapies for NPC treatment.
Transient Neutropenia in Immunocompetent Infants with Respiratory Syncytial Virus Infection
Authors: Korematsu Tatsuya , Koga Hiroshi
Published: February 2021

The incidence of neutropenia and the association between neutropenia and severity of respiratory symptoms among infants with respiratory syncytial virus (RSV) infections remain to be elucidated. This single-center, retrospective study included immunocompetent infants (<10 months old) with laboratory-confirmed RSV infection admitted to our center between January 2012 and December 2019. Incidence of neutropenia (<1.0 × 109/L) within 10 days of onset and risk factors associated with subsequent neutropenia were evaluated. Among the 292 infants with RSV infection, including 232 (79%) with mild infection, neutropenia was observed in 31 (11%), with severe neutropenia (<0.5 × 109/L) in 3 (1.0%). No neutropenic infants developed serious infection or hematological disorder. Infants without neutropenia showed age <3 months at onset in 34%, C-reactive protein level <1.0 mg/L in 27%, and nasopharyngeal microbiota composition with any of Moraxella catarrhalis, Streptococcus pneumoniae, or Haemophilus influenzae in 63%. In comparison, infants with neutropenia showed age <3 months at onset in 74% (relative risk [RR] 2.15; 95% confidence interval [CI] 1.65–2.81), C-reactive protein level <1.0 mg/L in 55% (RR 2.02; 95% CI 1.38–2.94), and microbiota including Moraxella catarrhalis, Streptococcus pneumoniae, or Haemophilus influenzae in 15% (RR 0.24; 95% CI 0.10–0.61). Multiple logistic regression analyses showed that younger age at onset and absence of that nasopharyngeal microbiota profile were associated with development of neutropenia. In conclusion, age and airway microbiota are considered as risk factors for the development of transient neutropenia among infants with RSV infection. However, the neutropenia seems not to develop serious infection or hematological disorder.
A Critical Review about Different Vaccines against Classical Swine Fever Virus and Their Repercussions in Endemic Regions
Authors: Coronado Liani , Perera Carmen L. , Rios Liliam , Frías María T. , Pérez Lester J.
Published: February 2021

Classical swine fever (CSF) is, without any doubt, one of the most devasting viral infectious diseases affecting the members of Suidae family, which causes a severe impact on the global economy. The reemergence of CSF virus (CSFV) in several countries in America, Asia, and sporadic outbreaks in Europe, sheds light about the serious concern that a potential global reemergence of this disease represents. The negative aspects related with the application of mass stamping out policies, including elevated costs and ethical issues, point out vaccination as the main control measure against future outbreaks. Hence, it is imperative for the scientific community to continue with the active investigations for more effective vaccines against CSFV. The current review pursues to gather all the available information about the vaccines in use or under developing stages against CSFV. From the perspective concerning the evolutionary viral process, this review also discusses the current problematic in CSF-endemic countries.
Industry-Driven versus Natural Groundwater Flow Regime at the Dead Sea Coastal Aquifer
Authors: Levy Yehuda , Gvirtzman Haim
Published: February 2021

The coexistence of nature and anthropogenic development requires continuous monitoring and research to address and respond to unforeseen threatening processes that occur with time. This is particularly relevant to the groundwater flow regime in the coastal aquifer adjacent to the Dead Sea, the level of which is dropping, and the industrial evaporation ponds, whose levels are rising. The increasing hydraulic gradient between the two water bodies has produced severe leakage through the pond embankments. To prevent this leakage, a vertical deep sealing wall was built along the embankment. In this study, the overall leakage is calculated by mass balance, and the subsurface leakage component is numerically simulated, based on the mass balance and hydrological observations. Some of the leakage discharges into surface canals and some at the Dead Sea. The leakage volume increased from 20 mcm/year in the 1980s to 100 mcm/year before the sealing wall was built (in 2012), and from 60 mcm/year once the wall was established to 80 mcm/year today. Using the calibrated model, the leakage volume is predicted to increase in the next few decades, mainly through the Ye’elim alluvial fan. Further research effort is needed to come up with new preventive measures.
Seasonal Variation of Rainy and Dry Season Per Capita Water Consumption in Freetown City Sierra Leone
Authors: Ibrahim A Salmatta , Memon Fayyaz , Butler David
Published: February 2021

Ensuring a sustainable urban water supply for developing/low-income countries requires an understanding of the factors affecting water consumption and technical evidence of individual consumption which can be used to design an improved water demand projection. This paper compared dry and rainy season water sources available for consumption and the end-use volume by each person in the different income groups. The study used a questionnaire survey to gather household data for a total of 398 households, which was analysed to develop the relationship between per capita water consumption characteristics: Socio-economic status, demographics, water use behaviour around indoor and outdoor water use activities. In the per capita water consumption patterns of Freetown, a seasonal variation was found: In the rainy season, per capita water consumption was found to be about 7% higher than the consumption for the full sample, whilst in the dry season, per capita water consumption was almost 14% lower than the full survey. The statistical analysis of the data shows that the average per capita water consumption for both households increases with income for informal slum-, low-, middle- and high-income households without piped connection (73, 78, 94 and 112 L/capita/day) and with connection (91, 97, 113 and 133 L/capita/day), respectively. The collected data have been used to develop 20 statistical models using the multiple linear stepwise regression method for selecting the best predictor variable from the data set. It can be seen from the values that the strongest significant relationships of per capita consumption are with the number of occupants (R = −0.728) in the household and time spent to fetch water for use (R = −0.711). Furthermore, the results reveal that the highest fraction of end use is showering (18%), then bathing (16%), followed by toilet use (14%). This is not in agreement with many developing countries where toilet use represents the largest component of indoor end use.
Smart Urban Water Networks: Solutions, Trends and Challenges
Authors: Di Nardo Armando , Boccelli Dominic L. , Herrera Manuel , Creaco Enrico , Cominola Andrea , Sitzenfrei Robert , Taormina Riccardo
Published: February 2021

This Editorial presents the paper collection of the Special Issue (SI) on Smart Urban Water Networks [...]
Determination of Internal Elevation Fluctuation from CCTV Footage of Sanitary Sewers Using Deep Learning
Authors: Ji Hyon Wook , Yoo Sung Soo , Koo Dan Daehyun , Kang Jeong-Hee
Published: February 2021

The slope of sewer pipes is a major factor for transporting sewage at designed flow rates. However, the gradient inside the sewer pipe changes locally for various reasons after construction. This causes flow disturbances requiring investigation and appropriate maintenance. This study extracted the internal elevation fluctuation from closed-circuit television investigation footage, which is required for sanitary sewers. The principle that a change in water level in sewer pipes indirectly indicates a change in elevation was applied. The sewage area was detected using a convolutional neural network, a type of deep learning technique, and the water level was calculated using the geometric principles of circles and proportions. The training accuracy was 98%, and the water level accuracy compared to random sampling was 90.4%. Lateral connections, joints, and outliers were removed, and a smoothing method was applied to reduce data fluctuations. Because the target sewer pipes are 2.5 m concrete reinforced pipes, the joint elevation was determined every 2.5 m so that the internal slope of the sewer pipe would consist of 2.5 m linear slopes. The investigative method proposed in this study is effective with high economic feasibility and sufficient accuracy compared to the existing sensor-based methods of internal gradient investigation.
Three-Dimensional Flow of a Vortex Drop Shaft Spillway with an Elliptical Tangential Inlet
Authors: Yang Zhou , Yin Jinbu , Lu Yangliang , Liu Zhiming , Yang Haoyu , Xu Genhai
Published: February 2021

Vortex drop shaft (VDS) spillways are eco-friendly hydraulic structures used for safely releasing flood. However, due to the complexity of the three-dimensional rotational flow and the lack of suitable measuring devices, current experimental work cannot interpret the flow behavior reliably inside the VDS spillway, consequently experimental and CFD study on a VDS spillway with an elliptical tangential inlet was conducted to further discern the interior three-dimensional flow behavior. Hydraulic characteristics such as wall pressure, swirl angle, annular hydraulic height and Froude number of the tapering section are experimentally obtained and acceptably agreed with the numerical prediction. Results indicated that the relative dimensionless maximum height of the standing wave falls off nearly linearly with the increasing Froude number. Nonlinear regression was established to give an estimation of the minimum air-core rate. The normalized height of the hydraulic jump depends on the flow phenomena of pressure slope. Simulated results sufficiently reveal the three-dimensional velocity field (resultant velocity, axial velocity, tangential velocity and radial velocity) with obvious regional and cross-sectional variations inside the vortex drop shaft. It is found that cross-sectional tangential velocity varies, resembling the near-cavity forced vortex and near-wall free vortex behavior. Analytic calculations for the cross-sectional pressure were developed and correlated well with simulated results.
THE PROBLEM OF DIALOGUE IN CONTEXT GLOBAL PROCESSES OF MODERNITY
Authors: Kovalchuk Natalia , Ovsiankina Liudmyla
Published: February 2021

The article analyzes the global multipolar processes, to which representatives of all cultures of the world are involved today. There is an opinion that only intercultural dialogue in the near future should help to create a world solidary society, truly free and fair for all peoples, nations and countries, and not only for the "golden billion". In this context, the main task of the dialogue is to reconcile the representatives of different cultures and coordinate their efforts in joint activities to resolve political, environmental, socio-economic and demographic problems, to help all civilizations achieve social stability and socioeconomic growth. Special attention is paid to the analysis of S. Huntington's ideas about the confrontation that exists in intercultural communication between the West and other countries, as well as the determining factors of cultural identity (blood and faith, language, religion and family). People associate with those with whom they are in common and seek those with whom they are different. The article also analyzes the method of archetypes (proposed by S. Krymsky) as a mechanism for resolving conflicts arising in the intercultural communication of various ethnic groups. Its essence boils down to the fact that in ethnic conflicts that relate to the archetypal level of mentality of a certain people, representatives of different cultures should be bred. Ethnic groups, historically already have a common positive experience (in solving economic and political problems), it is much easier to understand each other and resolve any future conflicts on the way of integration.
DEVELOPMENT OF THE ISSUE OF USING CLOUD-ORIENTED SYSTEMS OF OPEN SCIENCE IN THE UKRAINIAN EDUCATIONAL SPACE
Authors: Marienko Maiia , Nosenko Yuliia , Sukhikh Alisa
Published: February 2021

The article presents the Ukrainian experience in developing the issue of using cloud-oriented systems of open science. In particular, the concept of “digital transformation” and the processes it covers (digitization and digitalization) are considered. The main directions of digitalization in Ukraine are outlined. The main changes in the direction of Ukraine's integration into the European research area are reflected. The main provisions of the project “Cloud-based systems of open science for teachers’ training and professional development” (since October 2020) – the winner of the competition “Support for research of leading and young scientist”, implemented through grant support of the National Research Foundation of Ukraine. The purpose and objectives of the project, the expected social effect and results are announced. One of the key results should be the methods of using open science services.
Organización del mantenimiento preventivo en las gerencias de bienes y servicios de CORPOELEC región- occidental
Authors: Cedeño Manuel
Published: February 2021

El estudio buscó describir la organización del mantenimiento preventivo aplicado en las gerencias de bienes y servicios de CORPOELEC Región Occidental. Metodológicamente se tipificó como descriptiva, con diseño no experimental, transeccional y de campo. La población estuvo constituida por los departamentos de flota de las gerencias de bienes y servicios de CORPOELEC Región Occidental. La técnica de recolección de datos fue la encuesta y el instrumento un cuestionario con escala de frecuencia, compuesto por 12 ítems, se utilizó el juicio de expertos para la validez y el coeficiente Alfa Cronbach para su confiabilidad, cuyo resultado fue 0,867. La media aritmética y la desviación estándar se usaron para el análisis de los resultados. Se concluyó, que dentro del proceso, los indicadores descentralización, autoridad, y organigrama se aplican dentro del objetivo. Sin embargo se requiere mejorar el resultado obtenido en el promedio del indicador funciones puesto que éste tiene baja aplicación.
Planificación del mantenimiento en las universidades públicas de la Costa Oriental del Lago
Authors: Betancourt Daryeling
Published: February 2021

La investigación tuvo como propósito describir la planificación del mantenimiento en las universidades públicas de la Costa Oriental del Lago. El tipo de investigación fue descriptivo con diseño no experimental, transeccional y de campo. La población quedó constituida por las personas que se desempeñan en el área de mantenimiento de las universidades analizadas. La técnica para la recolección de datos fue la encuesta, siendo el instrumento un cuestionario conformado por 12 ítems con cinco alternativas de respuestas, el mismo fue validado por expertos, mientras que su confiabilidad se determinó a través del coeficiente de Alpha Cronbach, obteniéndose 0,932. La técnica de análisis utilizada fue a través de la media aritmética. Se concluye que estas organizaciones otorgan alta presencia del plan estratégico, implementación del plan estratégico, ejecución del plan estratégico, así como de la evaluación y control del plan estratégico, en su gestión de mantenimiento, lo cual les atribuye una alta fortaleza.
Indicadores de mantenimiento en las instituciones universitarias públicas de la Costa Oriental del Lago
Authors: González Verónica
Published: February 2021

La investigación tuvo como objetivo determinar los indicadores de gestión de mantenimiento presentes en las instituciones universitarias públicas de la Costa Oriental del Lago. El estudio fue de tipo descriptivo, con diseño no experimental, transeccional y de campo. La población quedó constituida por las personas que se desempeñan en el área de mantenimiento de las instituciones bajo estudio. Para la recolección de datos se aplicó la técnica de la encuesta, a través de un cuestionario contentivo de 15 ítems, utilizando una escala dicotómica. La validación del instrumento se realizó mediante el juicio de expertos. La confiabilidad se calculó a través del coeficiente Kuder y Richardson, donde se obtuvo 0,93. El análisis de los datos se realizó mediante la estadística descriptiva, a través del estudio de las frecuencias registradas. Se concluye que los indicadores confiabilidad, mantenibilidad, disponibilidad, costo y calidad de servicio, poseen moderada presencia en la gestión de mantenimiento analizada.
Niveles de productividad operacional. Caso Laboratorios de Ingeniería Mecánica de las Universidades Públicas región Zulia-Venezuela
Authors: Antunez Jorge
Published: February 2021

El objetivo del presente trabajo se enmarca en describir los niveles de productividad operacional existente en los laboratorios de ingeniería mecánica de las universidades públicas región Zulia-Venezuela.  La metodología se contextualiza dentro de un tipo descriptiva, con diseño de campo, transeccional y no experimental. La población estuvo constituida por 77 profesores que laboran en los laboratorios. Se utiliza como técnica la encuesta y como instrumento un cuestionario de 9 ítems con escala tipo Lickert. La validación se realizó a través del juicio de expertos y la confiabilidad mediante el coeficiente de Alpha de Cronbach, obteniéndose un valor de 0,91. La media aritmética se utiliza para el análisis de los resultados. Se destaca la productividad del trabajo como el mejor nivel para describir las actividades realizadas en el laboratorio con el personal existente y la cantidad de tiempo invertido en elaborar las prácticas.
Grupos de interés de la responsabilidad social externa en la industria farmacéutica
Authors: Goncalves Carla
Published: February 2021

El objetivo de esta investigación fue identificar los grupos de interés de la responsabilidad social externa presentes en la industria farmacéutica del estado Zulia-Venezuela. El tipo de investigación fue descriptiva, con diseño no experimental, de campo y transeccional, utilizándose como población las droguerías farmacéuticas del estado Zulia inscrita en la Cámara de Industriales del Estado Zulia. La técnica de recolección de datos fue el cuestionario, validado por el juicio de cinco (5) expertos y la confiabilidad medida por el coeficiente Alpha de Crombach, cuyo valor fue de 0,913. Para el análisis de los datos se utiliza la estadística descriptiva a través del cálculo de la media aritmética. Se evidencia alta presencia en su Responsabilidad Social Externa de los consumidores, proveedores, competidores y gobierno, mientras, ostentaron mediana presencia lo referente a la comunidad y medio ambiente, como grupos de interés que permita promover la creación de una ciudadanía corporativa global.
Sistema automatizado para la gestión y control de requerimientos de soporte técnico
Authors: Garófalo Daniel
Published: February 2021

En algunas empresas, las actividades de control de incidencias de los requerimientos de los usuarios de equipos informáticos se llevaban en forma manual. Este método generaba retraso y lentitud en el registro, control y seguimiento de los incidentes, además del extravío de anotaciones debido a problemas de seguridad en el acceso a los datos, sin respaldo inmediato. En consecuencia, se diseñó para la empresa un sistema pionero capaz de registrar y controlar los diferentes requerimientos, ahorrar tiempo y realizar las tareas de manera rápida, sencilla, eficaz, además de proporcionar seguridad y respaldo. El trabajo se llevó a cabo bajo la modalidad de proyecto factible, con una muestra significativa y una aplicación exitosa en una empresa venezolana de distribución y manejo de géneros farmacéuticos. Se presenta el diseño y un ejemplo de generación de información en la historia de la creación de software. Se concluye con el cumplimiento cabal del propósito.
Factores de gestión logística de materiales para la rehabilitación de pozos de la industria petrolera
Authors: Landaeta Wilmer
Published: February 2021

El propósito del estudio fue identificar los factores de la gestión logística de para la rehabilitación de pozos de la industria petrolera en el Lago Maracaibo. La investigación fue descriptiva, no experimental, de campo, transeccional. La población estuvo conformada por 39 sujetos que gerencian y lideran las operaciones de rehabilitación de pozos. Se utilizó la encuesta, mediante un cuestionario autoadministrado, validado por 5 expertos en el área y medido mediante el método Alfa Cronbach obteniendo una confiabilidad de 0,73. Se utilizó la estadística descriptiva mediante el análisis de las medias y desviación estándar. Los resultados señalan que los factores de la gestión logística de materiales se presentan de forma moderada en general; con relación a los factores internos el indicador capacidad directiva alcanzó una muy alta presencia; referente al factor externo, el indicador político alcanzó una alta presencia, representado oportunidades de mejoras a fin de alcanzar una gestión efectiva.
Características de los indicadores de gestión para el mantenimiento en las gabarras de posicionamiento dinámico
Authors: Hernández Ibarra Adamery
Published: February 2021

El objetivo fundamental de la investigación fue determinar las características de los indicadores de gestión para el mantenimiento en las gabarras de posicionamiento dinámico en el Lago de Maracaibo. La investigación fue de tipo analítico, con un diseño no experimental, de campo, transeccional. La población estuvo constituida por (12) doce personas quienes ocupan cargos de gerentes, superintendentes y supervisores. La técnica aplicada fue la encuesta, el instrumento de recolección de datos utilizado fue un cuestionario, validado por cinco expertos. Se estimó la confiabilidad mediante el Coeficiente Alfa Cronbach cuyo resultado fue de 0,96; considerado de muy alta confiabilidad. Con relación al análisis de los datos se llevó a cabo mediante la estadística descriptiva, a través del estudio de los promedios. Finalmente se concluyó del análisis realizado, que en las gabarras de posicionamiento dinámico existe una moderada presencia de las características de los indicadores de gestión.
ESTRATEGIAS OPERACIONALES EN LAS EMPRESAS PRESTADORAS DEL SERVICIO DE PERFORACIÓN DIRECCIONAL EN PDVSA DIVISION - OCCIDENTE
Authors: Maldonado José Luis
Published: February 2021

La investigación tuvo como objetivo determinar las estrategias operacionales que se cumplen en las empresas prestadoras del servicio de perforación direccional en PDVSA División-Occidente. El estudio es descriptivo, con diseño no experimental, transeccional y de campo. La población quedó conformada por gerentes generales y de perforación de las empresas de perforación. Los datos fueron recolectados a través de la encuesta, con un cuestionario contentivo de 15 ítems, bajo una escala de frecuencia. La validación se realizó mediante el juicio de cinco expertos. La confiabilidad se calculó a través del coeficiente Alfa de Cronbach, obteniendo 0,9721. El análisis de los datos se realizó mediante la estadística descriptiva, a través del estudio de la media aritmética. Del análisis efectuado se pudo concluir que, se resaltan actividades relacionadas a plan de competencia, diseño del servicio y diseño del proceso, como estrategias operacionales cuyo objetivo es el de encontrar una ventaja competitiva sostenible.
PROCESO DE GESTIÓN DE RIESGO OPERACIONAL EN LAS EMPRESAS TRASNACIONALES EN EL OCCIDENTE DE VENEZUELA
Authors: Miquilena Talavera Dioneira , Jiménez Estrada Miguel Antonio
Published: February 2021

El objetivo de esta investigación fue caracterizar el proceso de gestión de riesgo operacional en las empresas trasnacionales en el Occidente de Venezuela. Se sustentó en los postulados teóricos de González (2013), Amendola (2006), Griffin y col. (2005), así como las normas y leyes de la LOPCYMAT (2005), Normas COVENIN2270:20202, entre otros. La investigación es de tipo descriptiva, con un diseño de campo, no experimental y transeccional. La población estuvo constituida por cuatro (4) empresas, siendo los sujetos informantes los gerentes y coordinadores del área, para un total de ocho (8) sujetos. La técnica de recolección de datos fue la encuesta. Se utilizó la estadística descriptiva para el análisis de los datos. Se concluye que estas empresas ostentan muy alto cumplimiento en los procesos de la gestión operacional, lo cual ubica a la variable en la categoría de excelente gestión.
Vegetation types with Quercus ithaburensis subsp. macrolepis in Greece
Authors: Theocharopoulos Michalis , Pantera Anastasia , Fotiadis Georgios , Papadopoulos Andreas
Published: February 2021

Quercus ithaburensis subsp. macrolepis is an important component of the Mediterranean flora, forming distinctive forests in the thermo and meso Mediterranean vegetation zone. The purpose of this study was to investigate the structure of Q. ithaburensis subsp. macrolepis communities of mainland and insular Greece, from a phytoecological point of view. The identification followed the Braun-Blanquet method and was based on 138 records from 19 areas. Seventeen vegetation types with Q. ithaburensis subsp. macrolepis have been distinguished in which the species holds a dominant, sub-dominant or differential role. All these groupments are attached to the class Quercetea ilicis distinguished in forest units of the Quercetalia ilicis (Quercion ilicis alliance) and pre-forest units of the Pistacio-Rhamnetalia alaterni (Ceratonio-Rhamnion and Pistacio-Rhamnion alliances) orders, while some very degraded communities, are difficult to be classified from a phytosociological point of view. Several diagnostic species of other phytosociological classes also appear, reflecting the impacts that these communities have undergone. The life form spectrum of these communities shows that therophytes are the most represented while for the chorological spectrum, the Mediterranean element is dominant.
Les erreurs d’identification des espèces du genre Tamarix L. au Maroc : clés non uniformes et espèces polymorphes / The identification errors of species of the genus Tamarix L. species in Morocco: non-uniform keys and polymorphic species
Authors: Bihaoui Abdesslam , Haddioui Abdelmajid , Hammada Soumaya
Published: February 2021

This work highlights the morphological diversity and characteristics that contribute to false identifications of Tamarix (Tamaricaceae) in Morocco. These difficulties of identification explain the controversy over the number of Tamarix species present in Morocco and around the world. Three taxa previously recorded in Morocco are confirmed : T. africana Poiret, T. boveana Bunge and T. aphylla Karst, while T. amplexicaulis Ehrenb could be present in a single station (Merzouga). Concerning other taxa : T. canariensis Willd and T. gallica L., their determination requires further study in view of their similarities.
Common Swifts (Apus apus) nesting in mature pine forests in Corsica
Authors: Thibault Jean-Claude , Armand Thomas , Beuneux Grégory , Cibois Alice , Courtois Jean-Yves , Seguin Jean-François
Published: February 2021

Tree breeding in holes has been recorded for the Common Swift (Apus apus) mainly in Northern Europe and Siberia. This behaviour, considered as ancestral, has also been noted in Corsican forests. Although marginal in terms of numbers, it is a perennial phenomenon. We present here a synthesis on the distribution and the characteristics of nesting sites, and we compare these breeding sites to the occurrences in continental Europe and Northern Africa. Our data add to the body of arguments in favour of the preservation of mature forests of the Corsican Pine on the island.
Diversité phytosociologique et séries dynamiques de la végétation de l’Atlas tellien occidental de Tiaret (N-O Algérie) / Phytosociological diversity and dynamic series of the vegetation in the Western Tell Atlas of Tiaret (NW Algeria)
Authors: Djamel Mohamed , Hadjadj Aoul Seghir , Decocq Guillaume
Published: February 2021

Ce travail est une approche descriptive et analytique qui a pour objet la connaissance de la structure et de la dynamique de la végétation des massifs atlasiques boisés de la région de Tiaret. Cette étude a été basée sur la réalisation de 287 relevés phytoécologiques à travers le secteur étudié suivant un échantillonnage mixte. Ces relevés ont été rassemblés dans des matrices de données puis traités par des analyses statistiques (CH, AEI, DCA). L’approche phytosociologique met en évidence une grande richesse phytocénotique (19 groupements décrits dont 4 associations nouvelles). Les résultats obtenus montrent que les principaux gradients selon lesquels ces groupements s’agencent sont le type physionomique et la nature chimique du substrat. Il apparaît que la succession dynamique au niveau des différentes séries de végétation échantillonnées, notamment celle post-matorral, se retrouve le plus souvent dans des états de blocage ou de dégradation, sinon évolue vers des systèmes artificiels suite à l’invasion par des essences opportunistes caractéristiques du modèle « expansionniste ». Ces états de dynamiques semblent avoir comme origine les contraintes de nature anthropique, notamment le feu et le pâturage.
Ecosystem services in salt lakes: An ethnobotanic case study of halophytes from Algeria / Services écosystémiques des lacs salés: étude de cas ethnobotanique des plantes halophytes d’Algérie
Authors: Demnati Fatma , Boubaker Zoubir , Allache Farid , Ernoul Lisa
Published: February 2021

Ecosystem services are well recognized in wetlands ; however, less attention is given to the services provided in salty wetland habitats. There are numerous salt lakes of international importance located in the northern Sahara region of Algeria. An ethnobotanical survey was conducted among the local population surrounding Chott Merouane. This survey was implemented to determine plant diversity and possible ecosystem services and improve conservation in these sensitive wetland habitats. Chott Merouane is a Ramsar site located in the southeast of Algeria in the Mediterranean bioclimatic Sahara. Based on a literature review of halophytic plants in the study area. The botanical inventory identified 22 plant species belonging to 20 genera and 16 families. Amongst these plants, Amaranthaceae, Zygophyllaceae, Nitrariaceae and Asteraceae dominated. A total of 48 participants were randomly selected and interviewed from three villages. The semi-directed interviews revealed that 77% of the plant species were used for traditional medicine, 65% for fodder, 41% for wood-fuel, 14% for crafts and 5% for food and other uses. The three endemic species identified (Tetraena geslinii (Coss.) Beier & Thulin, Limoniastrum guyonianum Boiss. and Euphorbia guyoniana Boiss. & Reut.) had the highest values of relative frequency of citation and use value. Local knowledge was unevenly distributed and showed significant differences by gender and education level. This study highlights the importance of provisioning and cultural ecosystem values attributed to plants in salty wetlands and demonstrates the importance of ethno-botanical studies as a basic tool to contribute to the management and conservation of wetland plant resources in salty wetland environments.
ТАНЦЮВАЛЬНА ОСВІТА В КИТАЇ: АНАЛІЗ ОФФЛАЙН ТА ОНЛАЙН ТРЕНДІВ
Authors: Разуменко Т. О.
Published: February 2021

Статтю присвячено аналізу сучасного стану розвитку 81 танцювальних шкіл в Китаї, виявлено тренди естетичної освіти онлайн та оффлайн. У статті використано загальнонаукові методи дослідження (аналіз, синтез, порівняння, систематизація та ін.). Для обробки вихідних даних, що розкривають досліджувану проблему, використано порівняльно-історичний метод, що дозволяє виявити особливості розвитку танцювальної освіти в Китаї в сучасному аспекті. Проаналізовано актуальні публікації китайських учених, пов‟язані з розвитком танцювальної освіти в Китаї як в історичному, так і в сучасному аспекті. Увага приділяється статистичній оцінці ринку освітніх послуг онлайн, у тому числі – співпраці шкіл з провайдерами платних послуг для створення релевантного контента, який набирає популярності в умовах пандемії COVID-19. Розглянуто діяльність основних танцювальних шкіл, які здійснюють онлайн та оффлайн освіту, зокрема Little Swan Art Center, Wu Yulun, Isee Cinderella, Red Dance Shoes та деяких інших. Визначено умови, які сприяють розквіту танцювальної освіти і зазначено причини її популярності серед школярів та батьків. На думку експертів, навчання танцям через інтернет сприяє більш продуктивній діяльності вчителів, ефективно вирішує кадрову проблему нестачі вчителів із танцевальною освітою, але, з іншого боку, це також може прискорити поширення та використання Інтернет-платформ для розповсюдження корпоративного бренду на більш широкій території. Розвиток танцювальної інтернет-освіти безпосередньо пов‟язаний і з необхідністю забезпечення якості освіти викладачів танців основної платформи та франчайзингових курсів, а також зменшенням вартості навчання для вчителів. Разом з тим, Міністерство освіти Китаю проводить послідовну політику підвищення якості естетичного виховання в школі. Зокрема, застосування методу комплексної оцінки дозволяє всебічно оцінити вміння та танцювальні навички дитини. Зроблено висновок про те, що танцювальна освіта онлайн безумовно є перспективним напрямом, якому потрібно розвиватись та покращувати якість послуг за рахунок спеціальної підготовки вчителів, але на даний час вона ще не здатна конкурувати з традиційними танцювальними школами оффлайн.
BASIC PATTERNS OF METHODOLOGY OF TECHNOLOGICAL PREPARATION OF PRODUCTION AND ADAPTIVE CONTROL IN DIGITAL PRODUCTION SYSTEMS FOR METALWORKING
Authors: Ingemansson A. R.
Published: February 2021

In the article the basic patterns of developed methodology of technological preparation of production and adaptive control of stability and quality in automated metalworking industry are described.
IMPLEMENTASI METODE QUANTUM TEACHING TERHADAP PENINGKATAN HASIL BELAJAR MATEMATIKA PADA SISWA SEKOLAH MENENGAH PERTAMA
Authors: Purba Tuty Novelindah
Published: February 2021

In general, this study was to determine the application of the quantum teaching-learning method with the discussion method in improving mathematics learning outcomes for seventh-grade students of SMP Negeri 2 Dolok Pardamean, Simalungun Regency. This study used experimental research on grade VII students of SMP Negeri 2 Dolok Pardamean, Simalungun Regency. The research was conducted by taking samples from two classes, namely the experimental class (15 students per class) and the control class (15 students per class). The sample categories were taken from two of four parallel categories that were determined randomly (random category samples). The tool used in this study was a testing technique in the form of empirically verified paper questions. Data analysis used the t-test, first testing for normality and homogeneity. Based on the results of data processing, it was known that the application of the quantum teaching-learning model with the discussion method had a significant effect on increasing mathematics learning outcomes obtained.
Effects of an ambient learning display on noise levels and perceived learning in a secondary school
Authors: Tabuenca Bernardo , Börner Dirk , Kalz Marco
Published: February 2021

Recent reviews addressing the impact of noise exposure in teaching and learning situations conclude negative effects on learning performance. Providing objective real-time feedback on noise is key for teachers and students to adjust it into suitable levels. This experimental work presents the results from a study exploring the visual feedback based on noise level and the impact on students’ (n = 198) perceived learning performance collected in 24 sessions. The results suggest persuasive effects of the ambient display on the groups and an improvement of noise awareness in students. Measurements of perceived learning-performance, and perceived noise were collected and correlated with the objective noise samples concluding poorer perceived learning performance in noisiest groups. Finally, implications for further research as well as lessons learned to moderate noise levels in classrooms using ambient displays are discussed.
Evaluation of the Case Management System in the United Arab Emirates Judicial System
Authors: Alsuwaidi Abdulrahman Ahmed , Rosman Arieff Salleh Bin , Shehab Ahmed A. A.
Published: February 2021

The objective of the present study, evaluation of the case management system in the United Arab Emirates’ judicial system, evolved as well as determined the concept and framework of case management, which proved to be very much essential to changing United Arab Emirates’ case management system. The results of the present research evaluated United Arab Emirates’ current case management system and developed several core findings based on this evaluation. This paper outlines the development of the basic question: what is the evaluation of the case management in the United Arab Emirates?, which is enhanced by the framework of the literature review. Most importantly, the application of the case management system is one of the most significant breakthroughs of the United Arab Emirates judicial system, transforming traditional practice with modern legal management.
Gunung Sewu Geopark Sites Naming: A Word Formation Analysis
Authors: Sujatna Eva Tuckyta Sari , Heriyanto  , Krisnawati Ekaning , Amalia Rosaria Mita , Pamungkas Kasno
Published: February 2021

This paper is a preliminary study whose purpose is to conduct a word formation analysis on the Gunung Sewu geopark site’s naming patterns. The Gunung Sewu geopark is one of the four UNESCO Global Geoparks in Indonesia, which include Ciletuh geopark, Gunung Batur geopark, and Gunung Rinjani geopark. As one of the four UNESCO Global Geoparks, Gunung Sewu has seventeen different named sites that comprise the data of this article. They are Gunung Api Purba Nglanggeran, Kali Ngalang, Hutan Wanagama, Air Terjun Sri Gethuk, Goa Kalisuci, Goa Jomblang, Goa Pindul, Lembah Mulo, Pantai Baron, Pantai Krukup, Pantai Krakal, Pantai Siung, Gunung Batur, Pantai Wediombo, Hutan Wisata Turunan, Goa Cokro, and Lembah Kering Sadeng.An analysis of the types of sites determined that among the seventeen named sites, there are five beaches (29%), four caves (23%), two forests (12%), two hills (12%), two mountains (12%), one river (6%), and one waterfall (6%). Furthermore the dominant type of site is a beach. Concerning the word formation, 6% of names were produced through blending, 35% through coinage, 35% through compounding, and 24% through eponym. Coinage and compounding share the highest number of instances.
Effectiveness of Street Vendor Regulation Policies to Improve Public Order in Yogyakarta, Indonesia
Authors: Pambudi Argo
Published: February 2021

Street vendors represent a phenomenon that occurs in urban areas, both in developing and developed countries. Their existence is supported by the entrepreneurial spirit of the vendors. However, the practice could be improved if street vendors were made aware of the rights of the community whose public space they utilize and must respect. A well-organized street vendor will benefit various parties such as tourists and will support the community’s economy as well. This study aims to analyze the level of success of the implementation of government policy regarding the regulation of street vendors in Yogyakarta and surrounding areas. The method used in this study is qualitative descriptive analysis, which builds a conceptual model that reflects the actual hidden phenomenon. The data for the study were collected through observations, interviews, and an exploration of the relevant literature. The results found that the licensing regulations as stipulated by the decision of the mayor of Yogyakarta are not implemented in accordance with the provisions. An evaluation of the implementation of licensing rules shows that they have not yet reached the most beneficial results. Some street vendors cannot implement them due to a combination of several factors, namely the importance of their economic survival, the non-financial “costs” that street vendors would incur, and the lack of knowledge about the substance of the policies governing street vendors.
Organizational Justice and Organizational Pride to Achieve Job Satisfaction and Job Performance
Authors: Widyanti Rahmi , Irhamni Gusti , Ratna Silvia , Basuki
Published: February 2021

Recent literature discusses two aspects that improve HR performance, namely organizational justice and organizational pride. Employees who are treated fairly and have pride in the company will exhibit increased job satisfaction and job performance in private universities in the Kalimantan and West Java Region, Indonesia. This study analyzes the relationship between organizational justice and organizational pride on job satisfaction and job performance among employees of private universities in Indonesia. This study uses a quantitative approach through administering a questionnaire to 200 respondents. The replies are then analyzed by Structural Equation Model method. The results show that organizational justice and organizational pride can positively and significantly influence job satisfaction and job performance.