bluuebunny/crossref_metadata_2025 huggingface dataset:
Agrosavia La 22: primera variedad de arracacha en Colombia
Authors: Garnica Montaña Johanna Paola , Atencio Solano Liliana Margarita , Rodriguez Rodriguez Oscar Jair , Villamil Carvajal Jorge Enrique
Published: March 2021

En Colombia se cultivan alrededor de siete materiales regionales en monocultivo y ocasionalmente en asocio, el ciclo es anual y sin estacionalidad de siembra, lo que permite cosechar durante todo el año. La producción es baja con rendimientos que varían entre 7 y 13 t ha-1 y se presentan problemas fitosanitarios sumado a la presencia de raíces comerciales con pigmentaciones púrpuras no deseadas en la comercialización. Con el propósito de ofertar nuevos genotipos, incrementar los rendimientos y atender la demanda de raíces tuberosas amarillas, se obtiene la variedad Agrosavia La 22 que conserva el color de la raíz y es el primer genotipo de esta especie en ser inscrito en el registro nacional de cultivares en Colombia. Agrosavia La 22 es el resultado de la selección de plantas provenientes de semilla sexual que se generaron luego del proceso de polinización cruzada de accesiones conservadas en el banco de germoplasma en Colombia. Se utilizaron descriptores cualitativos y cuantitativos de planta completa, hoja, semilla, tallo y raíz tuberosa, además de variables de rendimiento. Luego de cinco ciclos de evaluación los resultados muestran que esta variedad tiene raíces completamente amarillas, rendimientos experimentales de raíces comerciales de 33.48 t ha-1 y no comerciales de 1.31 t ha-1. En promedio una planta tiene nueve raíces comerciales cada una con un peso promedio de 271 g, 15 propágulos por planta y tolerancia a plagas y enfermedades frente a los genotipos usualmente usados.
Biosorción y tolerancia de Pb, Cr y Cd por la biomasa de Pleurotus ostreatus (Jacq. Ex Fr.) P. Kumm
Authors: Vallejo Aguilar María de la Luz Angélica , Marín Castro Marco Antonio , Ramos Cassellis María Elena , Silva Gómez Sonia Emilia , Ibarra Cantún Diego , Tamariz Flores Jose Victor
Published: March 2021

A nivel mundial, el uso indiscriminado de productos metálicos vertidos en agua utilizada en la agricultura ha generado una grave contaminación, por lo tanto, es importante establecer una metodología para su descontaminación a través de procesos biológicos, con hongos basidiomicetos ya que se ha demostrado que pueden degradar una serie de contaminantes orgánicos persistentes utilizando enzimas extracelulares, además de eliminar metales disueltos del agua mediante biosorción, actuando, como un intercambiador natural. Los objetivos de este trabajo fueron determinar entre tres metales (Pb, Cr y Cd) cuál fue removido más eficientemente de la solución acuosa por el micelio del hongo Pleurotus ostreatus, así como evaluar su tolerancia y describir los efectos causados por cada uno sobre su estructura celular. La adsorción de metales por el micelio en medio líquido se evaluó utilizando medio Kirk modificado, se cuantificaron las concentraciones retenidas durante 8 días en solución de 20 mg L-1 de cada elemento, los resultados indicaron que la adsorción de Pb (75%) fue la más eficiente, seguida de Cr (42%) y Cd (2.25%). En los resultados en medio de cultivo sólido (PDA) ninguna concentración de Pb y Cr inhibió el crecimiento del micelio, sin embargo, con Cd se inhibió a partir de 60 mg L-1; no obstante, los tres elementos causaron en el micelio alteraciones a nivel estructural. En conclusión, la cepa de P. ostreatus presento tolerancia y biosorción significativa (p≤ 0.05) para
Variabilidad genética y criterios de selección del rendimiento y los componentes en trigos harineros de temporal
Authors: Espitia Rangel Eduardo , Martinez Cruz Eliel , Villaseñor Mir Héctor Eduardo , Santa Rosa René Hortelano , Limón Ortega Agustín , Lozano Grande Azalia
Published: March 2021

El conocimiento de la variabilidad genética y heredabilidad del rendimiento y sus componentes dentro del fito mejoramiento permite optimizar el proceso de selección. El objetivo de la investigación fue determinar la variabilidad genética del rendimiento y de los componentes, así como sus correlaciones para identificar criterios de selección para mayor productividad de grano en trigo harinero. Se utilizaron 19 genotipos, sembrados en el ciclo primavera-verano en siete localidades de temporal en los Valles Altos de México. El diseño experimental fue alfa látice con dos repeticiones en cada ambiente. La unidad experimental fue de cuatro surcos de 3 m de longitud con una separación de 30 cm. Las variables evaluadas fueron: días a madurez, altura de planta, granos por espiga, número de espigas y granos por metro cuadrado, así como índice de cosecha, peso de mil granos y rendimiento de grano. Los mayores coeficientes de variación genética 20.8 y 18.4 fueron para rendimiento de grano y granos por espiga, respectivamente. Pero las variaciones genéticas y herededabilidades más altas las presento el peso de mil granos y granos por espiga lo cual facilita la selección de estos caracteres. El rendimiento presentó correlaciones significativas con número de granos por metro cuadrado, granos por espiga, número de espigas e índice de cosecha con valores de 0.92, 0.57, 0.54 y 0.54, respectivamente, que se pueden utilizar como criterios de selección para la productividad. Para este grupo de genotipos es necesario incrementar la variabilidad genética para espigas por metro cuadrado y peso de mil granos. Se propone a Don Carlos M2015, 6, 11 y 8 como fuentes genéticas para incrementar el peso de grano, número de granos por espiga, mayor número de espigas y granos por metro cuadrado para el rendimiento.
Impacto de cubierta, ecotipo y endomicorriza en morfología y calidad de chile piquín
Authors: Mendoza-Villarreal Rosalinda , Robledo-Torres Valentín , Pérez-Rodríguez Miguel Ángel , Guillén-Enríquez Reyna Roxana , Martínez-Cueto Víctor , Paredes-Jácome José Rafael
Published: March 2021

La investigación se realizó con ecotipos de chile piquín de Coahuila, Nuevo León y Zacatecas. Se evaluaron plantas de chile piquín del segundo año de producción. Se utilizaron dos ambientes: a) macro túneles de malla blanca, roja azul, negra tipo raschel con 30% de sombreo; y b) campo abierto con 100% de transmisión de luz. Se inocularon 50 esporas de un conglomerado de hongos micorrízicos arbusculares (Glomus mosseae, Rhizophagus intraradices, Sclerocystis coremioides y Gigaspora albida), directamente al sistema radical. Se utilizó un arreglo factorial 5 x 6 x 2 (cubiertas, ecotipos y micorrizas) y su distribución fue un diseño bloques al azar con cuatro repeticiones. Se evaluó el rendimiento y algunos caracteres morfológicos como altura de planta (AP), diámetro de tallo (DT), longitud de raíz (LR), peso fresco de planta (PFP), peso fresco de planta (PSP), peso fresco de raíz (PFR), peso seco de raíz (PSR), rendimiento por planta (RPP). Los resultados indicaron que la malla blanca favoreció los caracteres morfológicos de la planta con 320% en AP, 322.7% en DT, 235.8% la LR, 8 veces el PFP, 8.5 veces el PSP, 327.2% el PFR, 5 veces el PSR, 6.8 veces el RPP, en comparación a las plantas desarrolladas en campo abierto. Además, la calidad de chile piquín proporciona condiciones para el desarrollo de endomicorrizas (esporas y porcentaje de colonización). La malla azul con la menor radiación fotosintéticamente activa (RFA) influyó positivamente en las variables agronómicas, de calidad y la inoculación (número de esporas y porcentaje de colonización). El ecotipo que influyó en los SST, VitC, fenoles y NE fue el de SNL y el RTZ en variables agronómicas y % colonización. La inoculación con el consorcio de micorrizas mejoró los caracteres agronómicos y calidad del fruto de chile piquín.
Proton exchange membrane fuel cell fault and degradation detection using a coefficient of variance method
Authors: BARHATE Sujit , MUDHALWADKAR Rohini
Published: March 2021

Proton exchange membrane fuel cell is a clean energy generator as it emits water as a by-product. The fuel cell has various applications in stationary power generation and transportation. However, there is a need to improve durability for transportation applications. Fuel cell durability is limited as its performance degrades over a period due to aging, and fault conditions. In this study, we have compared fuel cell performance by using a new cell, and an aged cell. Degradation due to aging is experimented with by using a membrane that was operated for more than 2000 hours. Fuel cell performance degrades around 90% due to aging. Moreover, experimentally faults were created to study the degradation of fuel cell performance. We created three faults in the fuel cell system: Water flooding, reactant gas starvation, and high operating temperature. Fuel cell performance observed more than 30% degradation during the fault conditions. Furthermore, the coefficient of variance technique is used to detect aging, and the fault condition.
Relación entre calidad de sueño e indicadores de ansiedad y depresión
Authors: Ortiz Mieres Derlis , Armoa Medina Claudia Lorena
Published: March 2021

Se realizó un estudio cuantitativo, no experimental, correlacional, de corte transversal con el propósito de determinar la relación entre la calidad de sueño e indicadores de ansiedad y depresión en 100 estudiantes adolescentes de un colegio público de la ciudad de Capiatá, que fueron seleccionados por medio del muestreo aleatorio estratificado. Se utilizaron el Cuestionario de Calidad de sueño de Pittsburgh (PSQI) versión española elaborada por Royuela y Macías (1997), el Inventario de Depresión de Beck (BDI-II) versión española elaborada por Brenlla y Rodríguez (2006), y el Inventario de Ansiedad de Beck (BAI) versión española elaborada por Sanz y Navarro (2003). Se dedujo que existe relación entre la calidad de sueño y los indicadores de ansiedad y depresión. Se analizaron los datos con el IBM SPSS versión 20.0, donde se utilizó estadística descriptiva, además la prueba R de Pearson para las correlaciones y las pruebas T de Student y U de Mann-Whitney para la comparación de grupos. Se encontró una moderada correlación entre la calidad de sueño y los indicadores de ansiedad (0,485) y los indicadores de depresión (0,517). Se concluyó que cuanto menor sea la calidad de sueño, mayor será la presencia de estos indicadores.
Filtros cerámicos artesanales producidos en Paraguay para tratamiento de agua
Authors: Benítez Martínez Francisca Mburucuyá
Published: March 2021

El acceso al agua segura en el Paraguay es constantemente vulnerable por múltiples factores, esta situación hace propicia la proliferación de enfermedades generadas y/o transmitidas a raíz del consumo de agua contaminada. Actualmente se ofrece en el mercado múltiples opciones para el tratamiento a diferentes niveles de complejidad, para los fines de esta investigación exploratoria se optó por describir el proceso de fabricación y el funcionamiento de filtros cerámicos artesanales. Para el relevamiento de datos sobre los procesos relacionados con los actuales métodos de fabricación a nivel nacional se visitaron las instalaciones en donde estos se producen, indagando en los métodos y los modos de aplicación. Posteriormente se realizaron entrevistas a expertos en el área y a actores claves para sumar datos importantes para esta investigación. Se observaron que los procesos y materiales involucrados en la fabricación de filtros cerámicos en la unidad productiva estudiada presentan varias características que ligan este producto con la sostenibilidad tanto social, económica, ambiental y cultural, con involucramiento comunitario en su producción y proción del cuidado doméstico de la calidad del agua para consumo en la familia.
Impact of Procurement Methods and Procurement Requirements on Cost Over-run of Public Building Projects in Uganda
Authors: Kwio-Tamale Julius Caesar , Kibwami Nathan , Mwesige Godfrey
Published: March 2021

Cost over-run in building projects is endemic and routinely increases construction cost to as high as 52% of contract sums in Uganda. The consequence of this is underachievement of investment objectives due to additional costs to complete projects. This research investigated how procurement requirements and procurement methods combine to determine cost over-run of building projects. Procurement requirements of bid time, performance bond, insurance, workload and experience of contractors were investigated within contexts of procurement methods of open domestic bidding, restricted domestic bidding, open international bidding, restricted international bidding and requests for quotations. Purposive and snow-ball sampling were used in identifying construction professionals, consultants and contractors of building projects with cost over-runs. Correlation and independence of procurement requirements on 37 cost over-run datasets were analysed by Spearman's bivariate correlation co-efficient at 5% level of significance and variable inflationary factor of less than 5 respectively. Bid time and performance bond were found to reduce cost over-run of building projects most followed by workload and experience. Insurance increased cost over-run marginally. The novel contribution of this research is a model that explains 63% of cost over-run with 9% margin of error. The variants of the model for each procurement method are presented
Electric vehicles revolution: The future, challenges, and prospects in the Arab countries
Authors: Abdussalam Ali Ahmed  , Omar Ahmed Mohamed Edbeib  , Aisha Douma  , Ibrahim Imbayah Khalefah Imbayah
Published: March 2021

This study aims to highlight the electric vehicles revolution and its future in the Arab countries and the extent to which these countries are prepared for this modern industrial technology. This study divided into three main parts: The first part shows the historical introduction in electric vehicle manufacturing and how do electric vehicle works? While the second part presents the extent of the world's interest in electric vehicle technology, and the third part is devoted to evaluating the global electric vehicle sales and the future of electric vehicles in the Arab world, as recent few years have witnessed a remarkable official trend to introduce sustainable vehicles into the Arab world, along with a group of youth initiatives aimed at developing environmentally friendly green vehicles, which constitute an ambitious step to keep pace with the latest technologies and keep pace with global awareness of the need to address For global warming and environmental conservation.
Phytochemistry, pharmacology and botanical aspects of Murraya Koenigii in the search for molecules with bioactive potential - A review
Authors: Gunjan P. Malode  , Ashwini Y. Parbat  , Aayesha R. Shaikh  , Wrushali A. Panchale  , Jagdish V. Manwar  , Ravindra L. Bakal
Published: March 2021

The magical plant of Indian spice, Murraya koenigii(curry leaf) family Rutaceae grows throughout the Indian subcontinent. It is used in the treatment or prevention of many diseases including kidney stone, dysentery disorders, renal pain, stomach upsets & morning sickness. It is one of the main components of formulation in the traditional ayurvedic system of medicine since many centuaries. A scrutiny of literature reveals some notable pharmacological activities of plant. These include pharmacological activities such as antioxidant, antidiabetic, antitumor and neuroprotective.The leaves, roots and barks of this plant are rich in source of carbazole alkaloids. The carbazole alkaloids includes koenigin, bicyclomahanim-bicine, cyclomahanimbine, murrayastine, coumarine, koenidine has medicinal activities.
Anti-diabetic drug discovery using bioactive compounds: Molecular docking insights
Authors: John Oluwafemi Teibo  , Samuel Abidemi Bello  , Oluwaseun Abraham Adebisi  , Jeremiah Olorunjuwon Olugbami  , Titilade Kehinde Ayandeyi
Published: March 2021

Diabetes mellitus is a metabolic disorder that has become a global health problem. About 500 million people were estimated to be living with diabetes in 2018 with about 20 million in Africa and 2 million cases in Nigeria. Bioactive compounds offer an advanced starting point in the search for highly specific and potent modulator of bimolecular function as well as novel drugs, which can be studied with more precision by using computer aided drug design (CADD). Molecular docking employed for predicting the interactions between receptor and ligands is an integral aspect in drug discovery. The main objective is to attain ligand-receptor complex with optimized conformation and with the intention of possessing less binding free energy. Several studies have used this method to explore the potency of bioactive compounds to predict better alternatives in the search for an anti-diabetic drug with very effective therapeutic role and minimal side effects. This has been carried out by using several compounds such as Quercetin, against endogenous targets such as Glycogen phosphorylase, Peroxisome Proliferator-activated Receptor (PPAR)-y, Glucokinase, Protein Tyrosine Phosphatase 1-beta (PTP-1B), GLUT4, etc. In Silico tools such as Protein Database (PDB), GenBank and softwares such as Autodock and modeller are of major importance to these studies. The paper seeks to examine bioactive compounds basically quercetin that have been successfully identified through molecular docking and their molecular targets as well as recent advances in the use of molecular docking in the novel discovery and explanation of mechanisms of actions of some bioactive compounds in anti-diabetic drug discovery.
Pseudomonas aeruginosa: Mechanisms of resistance to antibiotics and case analysis
Authors: Verónica Jocelyne Flores-Velázquez  , Rocío Pérez-y-Terrón
Published: March 2021

Pseudomonas aeruginosa is an opportunistic pathogen, causing great concern due to the rapid increase in its resistance to antibiotics. The objective of the research was to describe the resistance mechanisms that P. aeruginosa possesses, as well as to report its behavior against antibiotics in the years 2003 to 2018 in Mexico. A retrospective and longitudinal documentary research was carried out in different digital resources referring to antibiotic resistance in P. aeruginosa. The results showed that the main resistance mechanisms of P. aeruginosa are β-lactamases, ejection pumps, mutations in porins, acquisition of plasmids, low permeability, formation of biofilms, alterations in penicillin-binding proteins, modifying enzymes of aminoglycosides and mutations in the active site. The antibiotics with the highest percentage of resistance presented between the years 2003 to 2018 were imipenen IMP, gentamicin GEN, ticarcillin / clavulanate TIC, trimethoprim / sulfamethoxazole TMS, ticarcillin TC, ceftriaxone CRO, aztreonam AZT, ceftazidime CAZ, cefepime FEP, levofloxacin LEV, chloramphenicol CL, tigecilcin TIG and ciprofloxacin CIP, with a peak of resistance between the years 2007 to 2008 and a possible downward trend in 2018. The behavior of resistance between the years 2003 to 2018 report a downward trend in the last two years.
Gypsum amendment and seasonal variability: effect on soil quality, fruit characteristics and toxicological responses of Cucumber (Cucumis sativus l.) in the Ahafo-Kenyasi Mining Area of Ghana
Authors: Kwaku Onwona-Hwesofour Asante  , Simon Abugri  , Nana Sarfo Agyemang Derkyi  , Daniel Sarfo Akoto
Published: March 2021

Depending on soil, climate and crop characteristics exposed subsoils can be amended with gypsum for agricultural activities when topsoil is inadequate as a result of natural and geophysical activities. To determine how exposed subsoil amendment with gypsum interact with weather patterns to influence soil chemical properties, cucumber growth, fruit characteristics and heavy metal concentration, a two-seasonal experiment was conducted in the major and minor rainy season of 2020 in the Ahafo-Kenyasi Mining Area in Ghana. The experiment was laid out as a 6x2 factorial arranged in randomized complete block design, consisting of 6 gypsum application rates (20 ton/ha, 40 ton/ha, 60 ton/ha, 80 ton/ha, 0 ton/ha (subsoil control) and 0 ton/ha (topsoil control)) in two rainy seasons and replicated three times. The results show that gypsum application and rainy seasons interact to significantly influence soil chemical properties, cucumber growth and fruit characteristics. Increasing gypsum application resulted in decreased organic carbon, increased calcium, increased available P, increased exchangeable magnesium (Mg), increased pH during both major and minor rainy seasons. Vine length, number of leaves, number of fruits per plant and fruit weight of cucumber were increased with increasing gypsum application during the minor rainy season. In spite of exceeding permissible limits in soils and crops, arsenic (As), cadmium (Cd) and mercury (Hg) showed similar concentrations (below 2 mg/kg) in cucumber during the minor and major rainy seasons across gypsum treatments. Lead (Pb) concentration in cucumber was significantly higher in the major season across treatments. There was no difference in lead (Pb) concentration for treated vs untreated, and no increase across the amendment range. Further studies on how heavy metals in soil and plants interact with plant phytochemicals in ecosystems and living tissues are recommended.
Glaucoma in self-reported relatives and non-relatives of Igbo glaucoma patients in Enugu, Nigeria
Authors: Nkiru Nwamaka Kizor-Akaraiwe
Published: March 2021

Purpose: To compare proportion of glaucoma and the associated factors among self-reported relatives and non-relatives of predominantly Igbo glaucoma patients Methods: An analytical cross-sectional survey of participants attending a free eye screening dedicated to relatives of glaucoma relatives in Enugu, Nigeria was carried out in July 2017. Non-relatives of glaucoma patients were expected to present for the free screening hence they were allowed to participate to prevent false claims. All participants were interviewed and underwent ophthalmic examinations. Glaucoma diagnosis was based on the ISGEO classification criteria adapted for Nigeria. Participants were subsequently grouped as glaucoma relatives and general population. Results: Forty-two and 56 participants were included in the relatives and general population groups respectively. The proportion of glaucoma in the relatives and general population groups was 43% and 20% respectively. The odds of having glaucoma was three times higher in relatives of patients than in general population (OR= 3.07, 95% CI; 1.25 – 7.5 p=0.013). About 52% of first-degree relatives were diagnosed with glaucoma. In the relatives’ group, 100% of siblings, 40% of children and 0% of parents had glaucoma. Proportion increased with age. Relatives were significantly younger than their probands at diagnosis (16years, p= 0.000). Only 5.6% of the relatives’ group were previously aware of diagnosis. Intraocular pressure and central cornea thickness were similar in both relatives and general population groups. Conclusions: In this screened Igbo population, over one-third of the relatives’ group and about one fifth of general population had glaucoma. Relatives were diagnosed at an earlier age. These findings will aid the advocacy for routine glaucoma family screening services.
Production of HPV16 capsid proteins in suspension cultures of human epithelial cells
Authors: Dirce Sakauchi  , Erica Akemi Kavati Sasaki  , Fernanda de Oliveira Bou Anni  , Aurora Marques Cianciarullo
Published: March 2021

Human papillomavirus (HPV) infection is a leading cause of morbidity and mortality in women worldwide. The virus is associated with benign warts and a broad spectrum of malignancies, including cervical cancer, considered a disease of high clinical relevance, especially in developing countries. In this study we developed the production of recombinant proteins HPV16 L1 and HPV16 L2 in human cells in suspension (293-F), which were transiently co-transfected with the pUF3L1h and pUF3L2h vectors. Expressions of recombinant HPV16 L1 and L2 capsid proteins was detected by laser scanning confocal microscopy and flow cytometry. Both proteins were identified intracellularly in the nucleus and cytoplasm of cells. The presence of these heterologous proteins and VLPs formation were detected by transmission electron microscopy (TEM) through colloidal gold immunolabeling and negative staining. Cell extracts containing recombinant proteins were purified by affinity chromatography and immunization of Balb/c mice with the formulation HPV16 L1/L2 VLPs containing adjuvant was able to induce higher titer of anti-HPV16 L1, when compared to HPV16 L2 antibodies by indirect ELISA assay. These data indicate that transient expression in 293-F cells was efficiently established. The results are promising for obtain recombinant proteins of the HPV capsid for future studies involving human papillomavirus, as well as to contribute for the development of other vaccine strategies for prevention against HPV.
The importance of physical activity in COVID-19 times
Authors: Rodrigo Iván Aguilar-Enríquez  , Antonio Rivera  , Benjamín Flores-Chico  , Luis Enrique López de la Rosa  , Yara Lorena Fernández-Montiel
Published: March 2021

The COVID-19 pandemic altered activities of societies, forced closures at the national level in several countries, populations had to isolate themselves at home. Different studies have been initiated that allow us to understand the changes in behaviors related to physical activity and sedentary lifestyle in populations. The objective of this work was the analysis of the importance of physical activity in COVID-19 times. A systematic review was carried out and a questionnaire was applied to the population that performs physical activity in parks of Puebla City, Mexico. The results of the present systematic review suggest that engaging in even light physical activity during the pandemic can help eliminate some of the negative impacts on the health of populations. Since those who experience a decrease in physical activity also have higher levels of stress and anxiety. The data obtained from the questionnaire applied to the study population showed a participation of 54% men and 46% women, ages 14-70 years for men and 18-69 years for women. Regarding the time they perform physical activity, men reported 2-3 days (40.74%), 4-5 days (29.62%) and >5 days (29.62%), women 2-3 days (17.39%), 4-5 days (52.17%) and >5 days (30.43%). Regarding the time that men spend sitting <3 hours (14.81%), 4-8 hours (70.37%) and >8 hours (14.81%), women <3 hours (13.04%), 4-8 hours (65.21%) and >8 hours (21.73%). The variables of practiced time of physical activity, days a week, minutes a day and hours sitting between men and women showed no significant difference (P>0.05). It is recommended that populations get involved in physical activities in order to maintain a better quality of life and thus mitigate the phenomena associated with confinement due to the pandemic.
Severe leukocytosis and cytokine storm in a patient with covid-19 pneumonia
Authors: Iza David Zabaneh  , Pamela K. Fonseca  , Jennifer T. Prime  , Sreedhara B. Alla
Published: March 2021

Since the emergence of the first cases of COVID-19 that was first reported in Wuhan China, the virus has spread globaly at a fast rate. It has carried a significant increase in the mortality rate. Most of these cases have been secondary to severe pneumonia as well as an increased incidence of thromboembolic complications leading to pulmonary embolism, myocardial infarctions, and strokes. It has been observed that many of these severe COVID-19 pneumonias have been associated with an increased levels of inflammatory markers including Cytokines and Interleukin 3 and 6 which can lead to an exaggereted humoral response with increased immunoglobulin production and tumor necrosis factors that can lead to lung tissue destruction. There is an overwhelming demand to find a mechanism to stop that vicious cycle and minimize tissue destruction. Thus, there is a need for more extensive studies regarding this medical dilemma in order to minimize the number of deaths around the world which so far has almost reached 2.5 million.
The mass of photons and gravity
Authors: Alexander Milanich
Published: March 2021

This article analyzes concepts of photons and results of old experiments with deflections of light by Sun’s gravity. It is possible to draw a conclusion that experimental results differ from theoretical predictions of both classical and General Relativity theories. In this article was proposed explanation based on alternative potential and the mass of photons.
Analisis Pelaksanaan Pembelajaran Jarak Jauh di SD Negeri Karangrena 03
Authors: Setyaningsih Kurnia Dwi , Eka Karma Iswasta , Badarudin Badarudin
Published: March 2021

Penelitian ini bertujuan untuk menganalisis dan mendeskripsikan pelaksanaan pembelajaran jarak jauh, serta mengetahui faktor pendukung dan penghambat pelaksanaan pembelajaran jarak jauh di SDN Karangrena 03. Jenis penelitian yang digunakan adalah penelitian kualitatif dengan metode deskriptif. Partisipan dalam penelitian ini yaitu kepala sekolah, guru, dan orang tua atau wali murid. Pengambilan data dilakukan dengan cara observasi, wawancara dan dokumentasi. Hasil penelitian ini dijelaskan sebagai berikut: 1) Pembelajaran jarak jauh di SDN Karangrena 03 dilaksanakan menggunakan metode daring dan luring, strategi yang diterapkan oleh guru yaitu menggunakan teknologi dengan media PJJ melalui Whatsapp group. 2) Faktor pendukung pelaksanaan pembelajaran jarak jauh yaitu guru mempersiapkan perencanaan yang matang dalam melaksanakan PJJ, adanya dukungan fasilitas internet dari sekolah, dan guru serta orang tua dapat memanfaatkan teknologi untuk komunikasi tanpa adanya kendala waktu. Faktor penghambat pelaksanaan pembelajaran jarak jauh yaitu sebagian besar orang tua tidak bisa selalu mendampingi peserta didik dalam belajar karena memiliki pekerjaan yang tidak bisa ditinggalkan, tugas yang diberikan guru memerlukan penjelasan lebih, dan motivasi belajar peserta didik menjadi menurun.
Implementasi Instrumen Penilaian Berbasis Macromedia Flash dalam Evaluasi Pembelajaran Volume Kubus dan Balok di Kelas V SDN Depok 01
Authors: Mushthofiyah Mushthofiyah
Published: March 2021

Penelitian dilatarbelakangi dari adanya kebiasaan pelaksanaan evaluasi pembelajaran menggunakan instrumen penilaian klasik di Sekolah Dasar Negeri Depok 01 Kecamatan Kandeman, Kabupaten Batang, Jawa Tengah. Penelitian fokus melaksanakan implementasi instrumen penilaian berbasis macromedia flash dalam evaluasi pembelajaran volume kubus dan balok serta mencari hasil implementasi instrumen penilaian berbasis macromedia flash di SDN Depok 01.  Tujuan dari penelitian adalah mendeskripsikan pelaksanaan implementasi dan memberi pengetahuan hasil implementasi instrumen penilaian berbasis macromedia flash dalam evaluasi pembelajaran volume kubus dan balok di SDN Depok 01. Desain penelitian merupakan deskriptif kualitatf yaitu penelitian menggunakan metode kualitatif yang disajikan secara deskriptif. Pengumpulan data dilakukan dengan observasi pelaksanaan evaluasi pembelajaran volume kubus dan balok menggunakan instrumen penilaian berbasis macromedia flash yang dilakukan oleh sumber data primer yaitu guru dan siswa kelas V, wawancara dengan sumber data, lalu didokumentasikan dalam bentuk gambar/foto dan catatan lapangan. Keabsahan data penelitian menggunakan uji credibility (validitas internal), uji transferability (validitas eksternal), dan uji dependability (obyektivitas). Hasil penelitian menunjukkan bahwa pelaksanaaan implementasi instrumen penilaian berbasis macromedia flash dalam evaluasi pemebelajaran volume kubus dan balok di kelas V SDN Depok 01 berjalan sangat baik. Dalam mengimplementasikan instrumen penilaian berbasis macromedia flash pembelajaran volume kubus dan balok di SDN Depok 01 berakibat kurang baik dalam memenuhi syarat alat evaluasi yang baik. Beragam pendapat dari guru kelas V SDN Depok 01 sesuai dengan teori mengenai pelaksanaan implementasi instrumen penilaian berbasis macromedia flash dalam evaluasi pembelajaran volume kubus dan balok. Hasil implementasi dapat diketahui berdasarkan aspek dari guru, siswa, dan sekolah sesuai situasi sosial penelitian.
Strategi Bimbingan dan Pelatihan Guru Dalam Pembelajaran Menggunakan Aplikasi Google Pada Pembelajaran Daring Untuk Meningkatkan Efektifitas Belajar Siswa Dimasa Pandemi Covid-19
Authors: Mulyanah Nyi , Andriani Ana
Published: March 2021

Penelitian ini bertujuan untuk meningkatkan  kemampuan dan profesionalitas  guru dalam penggunaan aplikasi google pada  pembelajaran daring untuk meningkatkan efektivitas belajar siswa selama masa pandemi covid-19 di Korwilcam Dindik Somagede Kabupaten Banyumas. Metode penelitian ini menggunakan metode Mixed Methods sedangkan model penelitiannya Sequential Expplonatory. Realitas empirik memperlihatkan bahwa kondisi saat ini sangat meprihatinkan menurunnya  kualitas pembelajaran di sekolah saat ini dengan pola  Pembelajaran Jarak Jauh (PJJ). Beberapa penyebabnya adalah kurangnya ketersediaan alat/media yang dimiliki sekolah, kurangnya kemampuan guru dalam mengoperasikan alat/media seperti  laptop; akses internet yang kurang mendukung untuk kelancaran pembelajaran daring; tidak semua siswa memiliki smartphone. Berdasarkan  analisis kebutuhan  86,7% dari 214 guru setuju untuk dilaksanakan bimbingan dan pelatihan penggunaan google (google form, google classroom, google drive, dan google meet). Penggunaan aplikasi google dalam PJJ guru berperan sebagai motivator, fasilitator, mediator, dan komunikator. Kemampuan guru dalam pembelajaran daring dengan menggunakan aplikasi google meningkat,  jumlah peserta yang mengikuti bimlat sebanyak 120 orang, semua peserta mendapatkan sertifikat kelulusan. Melihat hasil lulusan tersebut dapat dinyatakan berhasil  untuk  program diklat penggunaan aplikasi google.
Model Kinerja Pegawai: Kepemimpinan, Budaya Kerja, dan Motivasi Kerja dengan Kepuasan kerja variabel intervening
Authors:   Magister Manajemen Universitas Yarsi, Jakarta, Ami Jayanti Gusni , Nazwirman Nazwirman ,   Magister Manajemen Universitas Yarsi, Jakarta
Published: March 2021

The research aims to analyze and describe the influence of Leadership Variables, Work Culture, Work Motivation, Job Satisfaction towards Job Satisfaction Variables and Performance Variables on the Investment Alert Task Force of the Financial Services Authority. A total of 100 samples were analyzed using SEM (Structural Equation Model) with SmartPLS software. The results showed that leadership had a significant positive direct effect on job satisfaction. Leadership has a significant positive effect on performance. Work Culture has a significant positive effect on Job Satisfaction. Work Culture has a significant positive effect on performance. Work motivation has a significant positive effect on job satisfaction. Work motivation has a significant positive effect on performance. Job satisfaction has a significant positive effect on the performance of the Investment Alert Task Force. Job Satisfaction is able to mediate on Leadership on Performance. Job Satisfaction is able to mediate the Work Culture of Performance. Job Satisfaction is able to mediate on Work Motivation on Performance. Efforts to improve the performance of the Investment Alert Task Force employees of the financial services authority need to consider the four variables that influence it.
Model Loyalitas Pelanggan Klinik Kecantikan
Authors:   Universitas Sriwijaya Palembang Indonesia, Kamiluddin Kamiluddin
Published: March 2021

This study aims to analyze the factors that affect customer loyalty in the city of Palembang. The sample that will be used in this study are customers who regularly visit beauty clinics in Palembang, consisting of men and women from two beauty clinics aged between 15 and 65 years and have been customers for a long time. The sample of respondents consisted of 101 people using a Likert scale questionnaire and analyzed using the SPSS Amos 24 program's Structural Equation Modeling (SEM). The results showed that there was a mediation (intervening) of the satisfaction variable which caused an indirect influence between professional medical professionals and quality. service to customer loyalty has a greater value than direct influence. Service quality has a positive and significant effect on customer satisfaction. This positive influence is significant, so it can be concluded that customer satisfaction has a positive and significant effect on customer loyalty in the Palembang city beauty clinic.
Kepemimpinan transformasional dan transaksional terhadap perilaku inovatif: Mediasi oleh Variabel Psychological Empowerment
Authors:   Universitas Swadaya Gunung Jati, Syarif Hidayat Agi , Hilmiana Hilmiana ,   Universitas Padjajaran
Published: March 2021

The purpose of this study was to determine the significance of the effect of transformational and transactional leadership on innovative behavior with psychological empowerment as the moderator variable. The research method used is quantitative research methods. The population in this study were employees of the Regional Drinking Water Company (PDAM) of Cirebon City with a total population of 203 people. The sampling measurement technique used the Slovin formula with a margin of error of 10%, so the number of samples in this study was determined to be 67 respondents. The sampling technique uses the incidental sampling approach. The data collection technique used was a questionnaire with a Likert scale. The data analysis technique used is path analysis. The results showed that Transformational leadership had a significant effect on innovative behavior either directly or mediated by psychological empowerment variables. The transactional leadership variable did not have a significant effect on innovative behavior either directly or mediated by psychological empowerment variables. The psychological empowerment variable has a significant effect on increasing innovative behavior.
The Development of Cellular Automata-based Entrepreneurial Growth Simulator
Authors: Nugraheni Cecilia E. , Natali Vania
Published: March 2021

Entrepreneurship plays an essential role in the economic growth of a country. These roles include creating jobs, reducing unemployment, increasing people's income, combining production factors (nature, labor, capital, and expertise), and increasing national productivity. For the economy to thrive and healthy, it requires at least 4% of the population who work as entrepreneurs. Due to this vital role, entrepreneurial growth must be maintained. One of the efforts to do this is by monitoring growth directly and continuously. Besides that, another way is to do a simulation. By knowing the condition of entrepreneurship at one time and all the factors that affect entrepreneurial growth, simulations can be carried out to determine or predict future conditions. Based on this simulation, essential steps can be taken, or policies can be made to maintain profitable entrepreneurial growth. This paper presents a mathematical model that can simulate and visualize entrepreneurship's growth in six provinces of Sumatra Island, Indonesia. This mathematical model uses cellular automata as its basis and is called Entrepreneurial Cellular Automata (ECA). One of the advantages of Cellular Automata is that it is easy to visualize. The entrepreneurial model used as a reference is a model from the Global Entrepreneurship Monitoring (GEM). This mathematical model has been implemented in a simulator program. This paper describes the simulator development and the use of simulator to simulate and visualize the entrepreneurial growth of the six provinces.
Single Image Dehazing Using Deep Learning
Authors: Hartanto Cahyo Adhi , Rahadianti Laksmita
Published: March 2021

Many real-world situations such as bad weather may result in hazy environments. Images captured in these hazy conditions will have low image quality due to microparticles in the air. The microparticles light to scatter and absorb, resulting in hazy images with various effects. In recent years, image dehazing has been researched in depth to handle images captured in these conditions. Various methods were developed, from traditional methods to deep learning methods. Traditional methods focus more on the use of statistical prior. These statistical prior have weaknesses in certain conditions. This paper proposes a novel architecture based on PDR-Net by using a pyramid dilated convolution and pre-processing modules, processing modules, post-processing modules, and attention applications. The proposed network is trained to minimize L1 loss and perceptual loss with the O-Haze dataset. To evaluate our architecture's result, we used structural similarity index measure (SSIM), peak signal-to-noise ratio (PSNR), and color difference as an objective assessment and psychovisual experiment as a subjective assessment. Our architecture obtained better results than the previous method using the O-Haze dataset with an SSIM of 0.798, a PSNR of 25.39, but not better on the color difference. The SSIM and PSNR results were strengthened by using subjective assessments and 65 respondents, most of whom chose the results of the restoration of the image produced by our architecture.
Biology Teachers: Knowledge in Authentic Assessment Through Cooperative Integrated Reading and Composition Based Scientific Approach (Cirsa)
Authors: Ristanto Rizhal Hendi , Djamahar Refirman , Darmawan Ericka
Published: March 2021

Evaluation activities of biology learning process for learners is teachers’ and education units’ responsibility. An authentic assessment is crucial to be implemented in the learning process so that learners could be guided to have abilities in knowledge as well as attitudes and skills. The research aims in 2019 is to observe 50 biology teachers’ differences in biology teachers’ skills in Bekasi Regency, Indoensia in mastering authentic assessment knowledge in biology learning before and after the implementation of training activities through a Scientific Approach-based Cooperative Integrated Reading and Composition (Cirsa).  Cirsa, a learning developed by integrating a CIRC-based scientific approach, axpected to facilitate teacher learning in accordance with the objectives. The research is a quasi-experiment using one group pretest-posttest design. The research independent variable includes Cirsa learning model, whereas the dependent variable is concept understanding of authentic assessment. The research data are analyzed using descriptive statistics that encompasses teachers’ response on learning and analysis of average pretest and posttest. The research results indicate that there is an influence of Cirsa learning application on the concept mastery of authentic assessments of Biology teachers.
Experimental Design in Constructing Low Temperature Sensor Based on Resistance Temperature Detector (RTD)
Authors: Singgih Suwito , Toifur Moh , Suryandari Suryandari
Published: March 2021

Thin film copper-based RTD still has a low TCR. Hence, plating a Cu-based RTD with nickel will develop a higher TCR. TCR is the sensitivity of RTD’s value in response to temperature change. The experimental design in constructing Cu/Ni thin film by using the electroplating method with a concentration of solution and electrode spacing’s variation has been done. Electroplating is performed with a concentration of solution and electrode spacing’s variations. Electroplating processed by limiting DC voltage to 6 volts. Electrolyte solutions composition were NiSO4, Ni2Cl2, H3BO3 and aquades. Concentrations of solutions can be varied by changing NiSO4 and Ni2Cl2 masses. Based on these concentrations of solutes and electrode’s spacing, this research used 15 samples. Thickness, thin-film resistance, and temperature sensor test are performed to each sample. The purpose of thickness test is to measure nickel plates which were formed from the electroplating process. Thin-film resistance test performed to measure sample resistance changing to the electroplating process, and the temperature sensor test was performed to measures the sample’s sensitivity in responding to temperature changes. This research’s result shows the greater the concentrations of solutes used for copper electroplating, the thicker nickel plates will form. This condition makes its resistance’s value decreasing.

Keywords: thin layer resistance, concentration of the solution, electrode distance, electroplating, thin layers of Cu / Ni, RTD, modules
Increasing Critical Thinking Skills and Communication Skills in Science: Blended Learning Project
Authors: Trisnowati Eli , Firmadani Fifit
Published: March 2021

This study aims to obtain an overview of improving students' critical thinking skills and communication skills whose learning activities use integrated blended learning of local wisdom. Learning activities are carried out by modifying blended learning stages, namely at the seeking information stage. The research subjects were 109 students of the 2nd semester of science education study program. The research was conducted using a quasi-experimental method with a pretest-posttest design. The instrument used was a multiple-choice test using an assessment rubric and an observation sheet. The research data were analyzed using multivariate analysis. The results showed that the improvement of students' critical thinking and communication skills with blended learning (treatment class) was more significant than students whose blended learning was not integrated with local wisdom.

 

Keywords: blended learning, local wisdom, critical thinking skills, communication skills
Kecemasan anak usia dini dan intervensinya (Studi kasus di TK Majaksingi)
Authors: Madyawati Lilis , Nurjannah Nurjannah
Published: March 2021

Pendidikan anak usia dini harus terencana, distimulan dan holistik. Kecemasan yang terjadi pada anak tak dapat diabaikan. Penelitian ini mengidentifikasi kecemasan yang dialami seorang anak perempuan berusia 5 tahun 6 bulan yang bersekolah di kelompok B TK Majaksingi kecamatan Borobudur. Terdapat upaya yang dilakukan guru, dan pengelola, penyebab siswa senang/ tidak senang, kerja sama sekolah dengan orang tua, serta hasil intervensinya. Pendekatan penelitian menggunakan qualitative research dengan case study. Peneliti melakukan survey pendahuluan, field study, penelusuran literatur, dan beberapa informan. Pengumpulan data melalui indept interview, metode observasi, dan teknik dokumentasi. Analisis data secara deskripsi terinci tentang kasus, pengumpulan kategori, interpretasi langsung,membentuk pola, serta kesepadanan kata. Kecemasan dipacu kesulitan akademik, tuntutan orang tua, riwayat kesehatan buruk. Pihak sekolah memberi intervensi berupa: mengkomunikasikan kepada orang tua, pendampingan, pengulangan, dan pembiasaan, namun belum menunjukkan hasil maksimal