bluuebunny/crossref_metadata_2025 huggingface dataset:
Spatial distribution of physical attributes of a clayey Latosol under different management systems
Authors: Roehrs Simone Andreia , Marins Aracéli Ciotti de , Secco Deonir , Rizzi Rogério Luís , Júnior Luiz Antônio Zanão , Chang Pablo , Borgmann Claudia , Villa Bruna de , Silveira Lucas da , Tokura Luciene Kazue
Published: March 2021

The use and management of the soil cause occasional changes in its physical properties; thus, altering its spatial variability. This work aimed to show the spatial distribution of physical attributes of a clay latosol under different management systems, through thematic maps of spatial distribution for values of these attributes. The experimental area consisted of three treatments: scarified no-tillage at 0.3 m depth (T1), no-tillage with 3 t ha-1 of plaster applied to the surface (T2) and; the control as traditional no-tillage system (T3). The attributes such as density, macroporosity, and microporosity in three soil layers were evaluated: 0-0.1; 0.1-0.2; and 0.2-0.3 m. The analysis of the experimental results indicates that all physical attributes presented spatial dependence between the data, with higher density values (values ranged from 0.95 to 1.37 Mg m3) and lower macroporosity in areas with T1 (SPD with scarification) and T2 (SPD gypsum) management systems. However, in all treatments, the Macro values presented a volume above 10.51%, which is above the limit value for good aeration and water movement in the soil. Treatment T3 (traditional SPD) showed favorable physical soil conditions, even after compaction
Application of biofertilizer in degraded pasture modified C dynamics and improved forage yield in a short-term period at the tropical region
Authors: Pinheiro Patrick Leal , Passos Renato Ribeiro , Peçanha Anderson Lopes , Mendonça Eduardo de Sá
Published: March 2021

Recovery of degraded pastures improves the sustainability of meat and milk production systems. Humic acids (HA) and endophytic diazotrophic bacteria (EDB) are known to have bio-stimulating effects on several crops but have not been tested for the recovery of degraded pastures. The aim of the present study was to evaluate soil C and N dynamics, nutrient uptake and forage yield of Brachiaria decumbens following the foliar application of HA and EDB in a degraded pasture. A randomized block design with six replications was used. The four treatments were: HA, EDB, HA+EDB and Control. The subplots consisted of four evaluation times for soil characteristics: before treatment application (0) and 30, 60 and 120 days after treatment application (ATA). Soil total organic carbon (TOC), recalcitrant carbon (Crecal), labile carbon (Clabil), total nitrogen (TN) and C and N stocks were determined in the 0-5, 5-10, 10-20 and 20-40 cm of soil layers. Forage yield and leaf nutrient contents were evaluated at 30 days ATA. The application of the HA and EDB increased the TOC, Clabil, soil C stock (≈18%), forage dry matter yield (16 to 52%) and nutrient uptake (≈30%) after 30 days ATA. Our results showed that the application of HA combined with EDB may be a strategy for the recovery of degraded pastures in the tropical region.
Potential effects of essential oil from Zanthoxylum limonella seeds against Tribolium castaneum (Coleoptera: Tenebrionidae)
Authors: Wanna Ruchuon , Satongrod Bunyaporn
Published: March 2021

Essential oils of plants with insecticidal properties have been considered as replacements for synthetic chemical pesticides to combat and control insect pests. The chemical composition of the essential oil from dried seeds of Zanthoxylum limonella Alston was determined by the Gas Chromatograph-Mass Spectrometry technique. Insecticidal activity was investigated on Tribolium castaneum Herbst using impregnated filter paper with six concentrations of essential oil at 0, 1, 2, 3, 4, and 5% for adults and larvae mortality tests, and 0, 2, 4, 6, 8 and 10% for egg mortality. All experiments were performed under completely randomized design (CRD) with four replications at 30±5°C and 70±5% relative humidity in 16:8 hours light/dark cycle. A total of 83 components were identified. The principal compounds in the essential oil of Z. limonella were beta-pinene (19.65%), 9-octadecanone (18.80%), D-limonene (9.76%), alpha-fenchene (8.48%), p-mentha-1,5,8-triene (7.16%), 1,8-cineole (6.88%), gamma-terpinene (5.46%), terpinen-4-ol (3.81%), linalool (2.73%), alpha-thujene (1.34%), decanal (1.32%), alpha-phellandrene (1.20%) and linalyl propionate (1.13%). Insecticidal activity presented that 5% of essential oil had the highest effect against T. castaneum at 120 h for adults and 48 h for larvae, while 10% of essential oil at 14 days obtained 100% mortality against eggs of T. castaneum. Results indicated that the essential oil of Z. limonella from dried seeds showed potential for use in the control of T. castaneum
Edaphic invertebrate macrofauna associated with cassava crop in different soil coverages
Authors: Guimarães Nathalia de França , Otsubo Auro Akio , Garcia Rodrigo Arroyo , Gallo Anderson de Souza , Carvalho Emerson Machado de , Silva Rogério Ferreira da
Published: March 2021

This study aimed to identify and assess the edaphic invertebrate macrofauna associated with cassava crop in succession to different soil coverages. The experimental design was randomized blocks as 6 x 3 factorial design with four replications. The first factor was soil cover cultivated from December 2014 to April 2015 (fallow, pearl millet, forage sorghum, Crotalaria ochroleuca, Urochloa ruziziensis and Corn+Urochloa ruziziensis). The second factor was sampling periods (March/2015, October/2015 and June/2016). We sampled four blocks of 0.25 x 0.25 x 0.20 m in each system, following the TSBF (Tropical Soil Biology and Fertility) collection method. The taxonomic composition and abundance of organisms, richness of groups and the diversity indexes of Shannon, Pielou equitability and Simpson dominance were evaluated. There was no interaction between the factors (soil cover x season) for the variables studied. There was difference in the dominance of organisms according to the soil cover (isolated), being the highest index (0.44) obtained by previous cultivation of forage sorghum. The abundance of organisms, group richness and diversity index were influenced by sampling period, demonstrating the influence of seasonality on the invertebrate macrofauna community of the soil
Effects of plant density on growth, yield and seed quality of quinoa genotypes under rain-fed conditions on red basalt soil regions
Authors: Minh Nguyen Van , Hoang Dinh Thai , Loc Nguyen Van , Long Nguyen Viet
Published: March 2021

Because of rainfall shortage, quinoa has the potential to supersede traditional crops that contribute to agricultural production less effectively. The current study determined the quinoa genotypes and plant density suitable for production under rain-fed conditions in red basalt soil regions. The experiments were conducted in the rainy and dry seasons of 2018/2019 using split-plot designs with three replications. In these, the main factor consisted of four quinoa genotypes and the subfactor four plant densities (13.3, 10.0, 8.0 and 6.6 plants m-2) with a row interval of 50cm and a plant interval of 15, 20, 25 and 30cm, respectively. The current study’s results showed that plant density significantly affected polynomial trends on panicle length, panicle number/plant, seed number/panicle, 1000-seed weight, seed yield, protein content, and ash content. The plant density of 8.0 plants m-2 seems to be the optimal density for quinoa under the studied conditions. Results here also indicate significant differences among quinoa genotypes for agronomical and seed quality performance. Better performances of quinoa occurred in the dry season compared to the rainy season. Atlas and Cahuil were the best adaptive quinoa genotypes in the red basalt soil regions
Foraging, spatial distribution and the effect of honeybees on soybean yield
Authors: Jung Afonso H. , Perini Clériosn R. , Valmorbida Ivair , Swarowsky Alexandre , Puntel Letícia , Froehlich Ricardo , Guedes Jerson C.
Published: March 2021

The soybean is the most cultivated grain crop in Brazil and there are many efforts to protect visitor pollinators, especially honeybees. The understanding of honeybee behavior on soybean fields is important to growers to apply integrated pest management strategies to avoid harm the pollinators. The European bee (Apis mellifera Linnaeus, 1758 (Hymenoptera: Apidae)) is a social bee, with European origin, whose the worker length is 12 mm to 13 mm with darker chest hairs. In this sense, foraging hours of Apis on soybean, its spatial distribution, the effect of pollination on soybean yield and the effect of insecticides on honeybee behavior were investigated. Two experiments were carried out. The first experiment was performed in a soybean field with 79 sampling points and four insecticide treatments to understand the spatial distribution of honeybees. In addition, foraging behavior of honeybees was evaluated hourly from 7:00am to 7:00pm randomly on 40 sampling points. The second experiment was carried out in cages with and without honeybees to quantify the effect of pollination on soybean yield under spray of chemical insecticides. Four hives with Africanized honeybees (A. mellifera) were set around the area. The hives had approximately six to eight brood frames and two to four food frames. Insecticides were sprayed as diferent treatments. The first experiment showed that honeybees prefer to forage on soybean flowers from 10:00am to 1:00pm and have random distribution. The use of A. mellifera as a pollinator did not increase the yield of soybean. Besides the particular manner of experiment’s conduction, the information of foraging behavior of honeybees, the pollination effect on soybeans yield and the effect of insecticides on honeybees are prudently discussed and some implication for soybean producers are also carefully addressed to avoid insecticide applications to harm pollinators. It is important to understand that the effect of pollination on yield of soybean depends on environmental conditions, cultivars, the effect of caging plants, and the abnormally high concentration of bees in the cages
Kinerja Mengajar Dosen pada Masa Work From Home
Authors: Nisa Lulu Choirun , Hikmaturrokhman Alfin , Sunardi Sunardi
Published: March 2021

The Covid-19 pandemic has caused universities to adapt to various changes, especially lecture activities. The purpose of this article is to describe how lecturers carry out the teaching and learning process during a pandemic. The indicators are teaching methods, technology, schedules, evaluation techniques, and constraints. The data collection technique used a survey approach with 216 respondents. The analysis and discussion results show that the teaching method uses online discussions, online assignments, and virtual face-to-face meetings. In terms of technology, the majority of lecturers use the WA Group application, and the rest uses other media. For learning schedule indicators, the majority of lecturers deliver online learning according to the schedule. In evaluation techniques, most lecturers use online tests or quizzes to assess student achievement. The implementation of distance learning has obstacles, namely the achievement and competence of skills and technical barriers, such as signals, devices, and practical delivery skills.
Spatiotemporal geostatistical analysis of precipitation combining ground and satellite observations
Authors: Varouchakis Emmanouil A. , Hristopulos Dionissios T. , Karatzas George P. , Corzo Perez Gerald A. , Diaz Vitali
Published: March 2021

Precipitation data are useful for the management of water resources as well as flood and drought events. However, precipitation monitoring is sparse and often unreliable in regions with complicated geomorphology. Subsequently, the spatial variability of the precipitation distribution is frequently represented incorrectly. Satellite precipitation data provide an attractive supplement to ground observations. However, satellite data involve errors due to the complexity of the retrieval algorithms and/or the presence of obstacles that affect the infrared observation capability. This work presents a methodology that combines satellite and ground observations leading to improved spatiotemporal mapping and analysis of precipitation. The applied methodology is based on space–time regression kriging. The case study refers to the island of Crete, Greece, for the time period of 2010–2018. Precipitation data from 53 stations are used in combination with satellite images for the reference period. This work introduces an improved spatiotemporal approach for precipitation mapping.
Лазерная доставка и спектральное исследование хлоринсодержащего препарата для лечения онихомикоза при последовательном лазерном (λ=2819 nm) и фотодинамическом (λ=656± 10 nm) воздействии
Authors: Беликов А.В. , Смирнов С.Н. , Тавалинская А.Д.
Published: March 2021

For the first time, the possibility of a dual-stage active laser delivery of a modern chlorin-containing photodynamic preparation under the nail plate for photodynamic therapy of onychomycosis was investigated and demonstrated. The extinction spectra of the photodynamic preparation Revixan (Areal Ltd., Russia) were investigated at different temperatures, as well as before and after exposure to Er:YLF-laser radiation with a wavelength of 2810 nm and photodynamic LED radiation with a wavelength of 656 ± 10 nm. It is shown that after heating and laser exposure, the amount of monomers in the chlorin-containing photodynamic preparation increases, and after photodynamic exposure decreases, which can affect the effectiveness of photodynamic therapy of onychomycosis.
Development and Experimental Testing of a Rotary Direct Wind Lidar System Based on Fabry.Perot Interferometer Technology-=SUP=-*-=/SUP=-
Authors: Yang Hao , Fang Zhiyuan , Cao Ye , Deng Xu , Xie Chenbo , Zhuang Peng , Wang Bangxin , Xing Kunming
Published: March 2021

A 532-nm Rayleigh--Mie Doppler lidar system based on three-channel Fabry--Perot interferometer (FPI) technology was developed to measure wind speed from the bottom of the troposphere to the top of the stratosphere. An FPI transmittance calibration experiment and laser frequency stability experiments were carried out, resulting in the accuracy of the emitted laser frequency falling within .8 MHz. In addition, multiple sets of radial wind speed detection experiments were conducted during day and night, and the results of horizontal wind speed detection experiments were compared with those from balloon radiosonde. Results showed that, although the signal-to-noise ratio is not high, due to factors such as the size of the telescope aperture and the low optical coupling efficiency of the system, the overall performance of the verification system is good. When the spatiotemporal resolution of a single radial wind speed measurement is 2 min and 75 m, the system has the ability to detect the wind field in the height range of 16 km. In the height range of roughly 2 km to 12 km, the horizontal wind speed of the system and the balloon radiosonde were compared, revealing a direct correlation between the data that exceeded 0.8. Thus, the accuracy of the system.s wind speed measurement results was fully verified. Keywords: Doppler lidar; rotary direct wind measurement; Fabry-Perot interferometer; Rayleigh-Mie scattering.
Пропускание кристаллов CsI, AgCl, КРС-5, КРС-6 в терагерцовой области спектра
Authors: Каплунов И.А. , Кропотов Г.И. , Рогалин В.Е. , Шахмин А.А.
Published: March 2021

The spectral dependences of the transmittance of CsI, AgCl, KRS-5 and KRS-6 single crystals in the infrared (IR) and terahertz (THz) ranges have been measured. The spectral dependences of the absorption (attenuation) coefficient of these crystals were calculated in the spectral range of 200–3000 μm. It was found, that these crystals are transparent in the millimeter range, which makes it possible to use materials when working with THz radiation. It should be noted that, in contrast to the IR spectral region, the optical quality of the surface of the crystal samples practically does not affect the transmission in the millimeter range.
Создание ZnO нанокатализатора, фиксированного на подложке, и перспективы фотокаталитического получения биогаза из растительных отходов
Authors: Денисюк И.Ю. , Морозова Д.А. , Игнатьева Ю.А. , Успенская М.В.
Published: March 2021

In this work discuss the production of biofuels from agricultural waste, such as sugars, alcohols, organic acids, by obtaining hydrogen and biogas from them during photocatalytic decomposition. Possible chemical reactions during photocatalysis are presented using the example of photocatalytic decomposition of methanol into hydrogen and carbon dioxide. Experiments on the preparation of nanostructured ZnO by the hydrothermal method in a solution containing zinc acetate and urotropin have been carried out. The obtained ZnO immobilized on a substrate is supposed to be used as a photocatalyst. A possible design of a reaction vessel and radiation sources for a laboratory setup for producing biogas from model solutions are considered. Key words: photocatalysis, biogas, ZnO, nanowires, waste disposal, renewable energy.
The Relationship Between Internet Use and Depression Among Middle and Older Adults With Self-Reported Vision Impairment: Case-Control Study (Preprint)
Authors: He Wenbo , Li Peiyi , Gao Yinyan , You Jiuhong , Qu Xing , Zhang Wei
Published: March 2021

BACKGROUND

The number of middle and older adults using the internet is increasing in China. Internet-based eHealth and mHealth technologies are also gradually changing people's lifestyles. In recent years, as visual impairment (VI) in the elderly has become increasingly prominent, we have focused our research on the relationship between internet use and depression in the middle and older adults with VI.

OBJECTIVE

This study examined (1) whether the rate of internet use and depression among middle and older adults with VI are different from the matched sample of peers without VI, and (2) associations among VI, internet use and depression.

METHODS

Data were obtained from the wave 4 of the China Health and Retirement Longitudinal Study (CHARLS) in 2018. Middle and older adults (aged≥45 years) with self-reported VI were matched with middle and older adults without VI, in a 1:1 ratio, based on age, sex, health status, and number of chronic diseases (N=15,398). Descriptive statistics and logistic regression models were used to examine the relationship of internet use and depression among middle and older adults with self-reported VI.

RESULTS

A total of 7699 middle and older adults reported VI in this study, 47.6 % of them were male and 9.8% aged ≥75. Those with internet use were significantly more socioeconomically advantaged than those who do not, and those who with VI were less likely to use the internet (adjusted odds ratio (aOR) 0.67, 95% CI 0.61- 0.74). People who have VI or blindness were associated with greater odds of depressive symptoms/depression (aOR 1.25, 95% CI 1.16 – 1.33, and aOR 1.48, 95% CI 1.22 – 1.80, respectively), and those who use the internet was associated with lower odds of depressive symptoms/depression (aOR 0.74, 95% CI 0.66 – 0.82). Some of the health seeking behaviors were also associated with higher odds of internet use and depressive symptoms or depression.

CONCLUSIONS

Compared with peers without VI, middle and older adults with VI are less likely to use the internet. Internet use may be an effective way to relieve depression, especially for VI groups, eHealth and mHealth can promote disease monitoring, diagnosis and treatment effectively. Therefore, it is necessary to strengthen the training and guidance of internet use for middle and older adults, especially for those with VI.
Poverty and Digital Divide: A Study in Urban Poor Neighborhoods
Authors: Mulyaningsih Tri , Wahyunengseh Rutiana , Hastjarjo Sri
Published: March 2021

Literature suggests that the penetration of digital technology may create a digital divide, particularly for groups that lack resources and the capacity to access technology. This study is keen to examine the poverty and digital divide, particularly in urban poor areas. There are two research objectives. Firstly, to examine the digital diffusion and digital literacy within poor urban neighborhoods in the City of Magelang, Central Java, Indonesia. Secondly, to understand the variation of digital diffusion and digital literacy across areas (with different levels of poverty), age groups, genders and occupations. The data is collected from surveys focused on measuring the access to information, digital diffusion and the use of technology among the poor. This study found that there is a digital divide problem among people in urban areas, especially among people with low incomes. Moreover, the diffusion is dominated by certain groups such as younger people and females. Furthermore, digital literacy among the poor is low. The policy implication is to improve access for digital diffusion and provide assistance to improve digital literacy skills.
Pandemic Crisis in Online Media: Quantitative Framing Analysis on detik.com’s Coverage of Covid-19
Authors: Adiprasetio Justito , Larasati Annissa Winda
Published: March 2021

This study shows how detik.com, a pioneer and one of the largest online media companies in Indonesia frames the Covid-19 pandemic crisis. From the 6713 news reports in January, February and March, the most dominant framing of the crisis that appeared in the coverage was attribution of responsibility, followed by frame of human interest, frame of morality, frame of conflict and the last is frame of economic consequences. The quantitative approach was used in this research to ensure that systematic analysis and non-arbitrary procedures can be carried out on large amounts of data. This study offered a better understanding on of how online media framed the crisis during the pandemic. The results of this study indicate that the frame of attribution of responsibility is not only the most widely used by detik.com, but also the most dominant when the government is the main source of the news. The form of attribution of responsibility in times of crisis tends to be stronger in the realm of government because crisis events are widespread, forming an experience felt at the national level. As a result, crisis events have the potential to become political symbols used in framing various debates regarding a policy in the long run. The average tone of news towards the government from January to March was positive, although it gradually became more negative.
PHYSIOLOGICAL AND BIOCHEMICAL RESPONSES OF WHEAT (TRITICUM AESTIVUM L.) PLANTS TO POLYAMINES UNDER LEAD STRESS
Authors: M RADY MOSTAFA , SEIF EL-YAZAL MOHAMED A , AA TAIE HANAN , MA AHMED SAFIA
Published: March 2021

Objective: The distribution, growth, development and productivity of wheat plants are greatly affected by various abiotic stresses such as lead (Pb) stress which become one of the most abundant toxic metal in the earth crust. Under the three applied polyamine (PAs) applications, the efficiency of wheat plants to tolerate Pb2+ stress in terms of growth and yield characteristics was noticed to varying degrees.

Methods: The current study focused on the impact of 2.0 mM lead (Pb2+) on growth and performance of wheat plants before and after PAs applications. The sterilized seeds were soaked for 8 h at room temperature, either in distilled water (as a control), 0.25 mM spermine (Spm), 0.50 mM spermidine (Spd), or in 1.0 mM putrescine (Put).

Results: Point out that, better growth and yield characteristics, chlorophyll “a” (Chl-a), chlorophyll “b” (Chl-b), soluble sugars, indoles, and enzymatic antioxidants (i.e., peroxidase (POX), catalase, ascorbate peroxidase, ascorbate oxidase, polyphenol oxidase, and glutathione reductase) and the enzyme α-amylase contents were obtained with seed soaking in 0.25 mM Spm, 0.50 mM Spd, or 1.0 mM Put than those generated with seed soaking in water under 2.0 mM Pb2+ stress. In contrast, the concentration of endogenous Pb2+ was significantly reduced.

Conclusion: Among all tested PAs, 1.0 mM Put showed the best results and thus is recommended, as seed soaking, for wheat to grow well under Pb2+ stress.
THE CONTROL OF APRICOT SEED DORMANCY AND GERMINATION BY LOW TEMPERATURE TREATMENTS
Authors: SEIF EL-YAZAL SAMIR A , EI-YAZAL MOHAMED A
Published: March 2021

Objective: Freshly harvested seeds of “Local” apricot variety were found to be dormant and did not germinate at all. A specific low-temperature stratification treatment was required to overcome seed dormancy. The most effective temperature for breaking seed dormancy, germination, and seedling growth was 5°C cold stratification (CS). Increased seed germination percentage was recorded when the period of stratification prolonged. Seedling developed from stratified seeds had better growth than those developed from non-stratified seeds.

Methods: For stratification treatments, the seeds with removed endocarp were mixed with moistened sand. Afterward, they were subjected to a period of stratification at 5°C. Seeds were stratified in pots of 30 cm×40 cm. Stratified seeds were regularly irrigated once per week. To prevent the water loss during stratification upper surface of pots was covered by a sack. The following stratification was applied for apricot variety: CS for 0, 3, 6, 9, 12, and15 days in 1998 and 1999 years for “Local” variety.

Results: Apricot seeds required a CS of about 15 days for “Local” variety to reach maximum germination and normal seedling growth. Moreover, when stratification period was prolonged, some of the chemical constituents of apricot seeds were increased and other was decreased. Therefore, it can be suggested that breaking of dormancy is coincided with several changes in different chemical constituents of seeds. Some of these materials increased (total, reducing and non-reducing sugars, total free amino acids, total indoles, and total and conjugated phenols) and other materials such as free phenols which decreased at seed germinations.

Conclusion: The most effective temperature for breaking seed dormancy, germination, and seedling growth was 5°C CS. Increased seed germination percentage was recorded when the period of stratification prolonged. Seedling developed from stratified seeds had better growth than those developed from non-stratified seeds.
POST-CORONAVIRUS DISEASE 2019 DE QUERVAIN’S THYROIDITIS – A CASE REPORT AND LITERATURE REVIEW
Authors: SAFWAN MOHAMAD , KN VIJAYAN , NAJEEB  , TG JITHU
Published: March 2021

De Quervain’s thyroiditis, also known as subacute thyroiditis (SAT), is a self-limiting inflammatory thyroid disease typically occurring a few weeks after a respiratory viral infection. A 29-year-old female with no comorbidities presented with persistent fever, neck pain, and swelling of 10 days duration. She also had tremors, fatigue, and palpitation. A careful enquiry revealed that she had been diagnosed with coronavirus disease 2019 (COVID-19) infection 6 weeks ago and had recovered uneventfully with conservative management. Her laboratories showed leukocytosis, elevated erythrocyte sedimentation rate, and C-reactive protein. Thyroid function tests (TFTs) yielded low thyroid-stimulating hormone, and high T3 and free T4. Ultrasonography neck was suggestive of thyroiditis. Thyroid scintigraphy demonstrated very low technetium uptake which confirmed SAT. Her symptoms ameliorated with nonsteroidal anti-inflammatory drug and beta-blockers and her TFTs improved during follow-up. We report this as emerging sequelae of COVID-19 infection. A persistent fever and neck pain following recent COVID-19 infection should alert clinician toward the possibility of de Quervain’s thyroiditis following severe acute respiratory syndrome coronavirus 2.
SAFETY CLIMATE TO PSYCHOLOGICAL WELLBEING ON CIVILIAN PILOT IN INDONESIA
Authors: AGUSTINA AMILYA , I MUSTOPO WIDURA , S SABARGUNA BOY , WANGGE GRACE , SOSROSUMIHARDJO DANARDI
Published: March 2021

Objective: Psychological wellbeing of the pilot can affect the flight cognitive function of the pilot, thus endangering the safety of the flight. The level of wellbeing of the pilots is related to the safety climate of the pilot. The purpose of this study is to determine the relationship between the safety climate and psychological wellbeing of civilian pilot in Indonesia.

Methods: This was an analytic study using cross-sectional method. The sample was determined by consecutive sampling technique. Data were collected by filling out questionnaires by subjects regarding the variables of the safety climate and psychological wellbeing. The data analysis used was multiple linear regression.

Results: The safety climate has a significant effect on psychological wellbeing (ß=0.921). The dimensions of the safety climate which have a significant effect are management (ß=0.135), safety systems (ß=0.143), procedures (ß=0.176), training (ß=0.153), communication (ß=0.232), and operations personnel (ß=0.185).

Conclusion: Management, safety systems, procedures, training, communication, and operations personnel have significant effects on psychological wellbeing of civilian pilot in Indonesia.
PERTINENT ILLS CONCOMITANT WITH MATRIFOCALITY IN ZIMBABWE: IMPLICATIONS FOR DEVELOPMENT
Authors: MAFA ITAI
Published: March 2021

Objective: The paper explored the challenges underpinning matrifocality in Zimbabwe, what is normally termed single motherhood. With the marital institution losing eminence in Africa due to a myriad of factors such as globalization, industrialization, and eurocentrism; this has greatly altered today’s family structure. The study was anchored on the realization that the traditional composition of an African family which recognized extended families has now been overshadowed by the surfacing of nuclear families as well as an increase in matrifocal families.

Methods: The article utilized a qualitative approach and a case study design. Convenience sampling was used to select 16 single mothers and a purposive sampling method was preferred to sample three key informants. For single mothers, in a mini-depth interviews were used to elicit detailed information and focus group discussion was adopted for key informants. Data were analyzed using the thematic process to integrate the findings.

Results: Stress-induced pathologies, relational conflict within the family set-up, economic privations, communal cynicism, and ostracism were identified as challenges compromising the development and stability of matrifocal families in Chiredzi district.

Conclusions: Guided by various feminism lenses and the ecological perspective, the article shifts from the pathological view to single motherhood, advocating for the need to focus the dialogue along the challenges faced by matrifocal families in an attempt to recommend interventions that can strengthen this family set-up.
CRIMINOLOGICAL ASPECTS OF WAR
Authors: Stojanović Marija
Published: March 2021

The paper deals with criminological analysis of war as a negative social phenomenon, from the earliest communities up to the New Age, by using historical and comparative methods. Being an armed conflict between people and groups, war is an act of force and coercion aimed at imposing one’s will on the enemy. The paper aims to describe the evolution of warfares through three major historical epochs: the Old Age, the Middle Ages, and the New Age. The author analyzes each major historical period in terms of the prevailing causes, motives, justifications and consequences of war in the specific period. The author points out that the use of force in warfare progressively expanded in every subsequent historical epoch, particularly as a result of the development of destructive tools and technologies. Although international customary law imposes limitations on the use of force in warfare, it does not necessarily reduce the scope and the impact of its application.
EXCLUSION OF ILLEGALITY OF OFFENSIVE SPEECH GIVEN IN DEFENCE OF A RIGHT OR PROTECTION OF JUSTIFIED INTERESTS
Authors: Kostić Danilo
Published: March 2021

This scientific article analyzes the basic features and elements of the criminal offense of insult from the theoretical and normative aspect, with specific reference to the analysis of the conditions necessary for the application of the special legal ground for excluding illegality of offensive speech, stipulated in Article 170 (4) of the Criminal Code of the Republic of Serbia. Relying on the critical analysis of national criminal legislation and a brief review of national courts’ practice, the author points out to the contradiction of adopted legal standpoints when interpreting the disputed provisions, and emphasizes the importance of ensuring uniform and consistent court practice in this field. Proper and complete consideration of the criminal offense of insult, and especially the ground for excluding the illegality of the taken actions, stipulated in the provisions of Article 170 (4) of the Serbian Criminal Code, calls for precise interpretation of these provisions. Inadequate conduct of judicial bodies entails the possibility of convicting the perpetrator of the criminal offense of insult, even if the requisite conditions prescribed in the positive law have not been satisfied.
CRIMINAL SANCTIONS IN DUŠAN'S CODE
Authors: Nešović Anđelija
Published: March 2021

Emperor Dušan's Code is the most important legal document of medieval Serbia, which is often considered to be the early Serbian "constitution". It is largely based on the Byzantine legal tradition, which entailed a rigorous system of criminal sanctions and diverse forms of punishment: death penalty by hanging and burning, mutilation of body parts, blinding, branding, scorching, cruel corporal punishment (beating, flogging), imprisonment, severe fines, confiscation of property, exile or banishment and dislocation as a form of collective punishment for the subjects. In this article, the author of presents and analyzes relevant provision of Dušan's Code, dealing with the envisaged criminal sanctions and different forms of punishment which were imposed on the perpetrators of criminal offences. The research methodology is based on normative, dogmatic and historical methods. Based on this analysis and comparison with the positive criminal legislation of the Republic of Serbia, the author concludes that Dušan's Code prescribed much more rigorous criminal sanctions, particularly given the fact that the current legislation law does not envisage death penalty and severe corporal punishment.
Remarks on metallic warped product manifolds
Authors: Blaga Adara-Monica , Hretcanu Cristina-Elena
Published: March 2021

We characterize the metallic structure on the product of two metallic manifolds in terms of metallic maps and provide a necessary and sufficient condition for the warped product of two locally metallic Riemannian manifolds to be locally metallic. The particular case of product manifolds is discussed and an example of metallic warped product Riemannian manifold is provided.
ON APPROXIMATION OF FIXED POINTS OF MEAN NONEXPANSIVE MAPPINGS IN CAT(0) SPACES
Authors: Abkar Ali , Rastgoo Mojtaba
Published: March 2021

A new iterative algorithm for approximating fixed pointsof mean nonexpansive mappings in CAT(0) spaces is introduced. As a result, a weak convergence theorem is established.The result we obtain improves and extends several recent results in the literature. Finally, some numerical examples are presentedto illustrate the main result and to compare the new algorithm with some existing ones.
Kenmotsu manifolds admitting Schouten-Van Kampen Connection
Authors: Halammanavar Nagaraja Gangadharappa , Devasandra Kiran Kumar Lakshmana
Published: March 2021

The objective of the present paper is to study Kenmotsu manifold admitting Schouten-van Kampen connection. We study Kenmotsu manifold admitting Schouten-van Kampen connection satisifying certain curvature conditions. Also we prove equivalent conditions for Ricci soliton in a Kenmotsu manifold is steady with respect to the Schouten-van Kampen connection.
η-RICCI SOLITONS IN (ϵ,δ)-TRANS SASAKIAN MANIFOLDS
Authors: Siddiqi Mohd Danish
Published: March 2021

The object of the present research is to study the (ϵ,δ)-TransSasakian manifolds addmitting the η-Ricci Solitons. It is shown that a sym-metric second order covariant tensor in an (ϵ,δ)-Trans Sasakian manifold isa constant multiple of metric tensor. Also an example of η-Ricci soliton in3-diemsional (ϵ,δ)-Trans Sasakian manifold is provided in the region where(ϵ,δ)-Trans Sasakian manifold expanding.
TENSOR PRODUCT OF THE POWER GRAPHS OF SOME FINITE RINGS
Authors: Soleimani Masoumeh , Naderi Mohammad Hassan , Ashrafi Ali Reza
Published: March 2021

Suppose R is a ring. The multiplicative power graph P(R) of R is the graphwhose vertices are elements of R, where two distinct vertices x and y are adjacent if and only if there exists a positive integer n such that x^n = y or y^n = x. In this paper, the tensor product of the power graphs of some nite rings and also some main properties of them will be studied.
HERMITE-HADAMARD TYPE INEQUALITIES FOR P-CONVEX FUNCTIONS VIA KATUGAMPOLA FRACTIONAL INTEGRALS
Authors: Toplu Tekin , Set Erhan , İşcan İmdat , Maden Selahattin
Published: March 2021

In this paper, firstly the authors establish Hermite-Hadamard inequality for p-convex functions via Katugampola fractional integrals. Then a new identity involving Katugampola fractional integrals is proved. By using this identity, some new Hermite-Hadamard type inequalities for classes of p-convex functions are obtained.
ON SOME NEW Pδ-TRANSFORMS OF KUMMER'S CONFLUENT HYPERGEOMETRIC FUNCTIONS
Authors: Parmar Rakesh K. , Rohira Vivek , Rathie Arjun K.
Published: March 2021

The aim of our paper is to present Pδ -transforms of the Kummer’s conﬂuent hypergeometric functions by employing the generalized Gauss’s second summation the-orem, Bailey’s summation theorem and Kummer’s summation theorem obtained earlier by Lavoie, Grondin and Rathie [9]. Relevant connections of certain special cases of the main results presented here are also pointed out.
THE CLASSICAL BERNOULLI-EULER ELASTIC CURVE IN A MANIFOLD
Authors: Altin Ayse
Published: March 2021

In this study, we describe the classical Bernoulli-Euler elastic curve in a manifold by the property that the velocity vector field of the curve is harmonic. Then, a condition is obtained for the elastic curve in a manifold. Finally, we give an example which provides the condition mentioned in this paper and illustrate it with a figure.
THE NEW WEIGHTED INVERSE RAYLEIGH DISTRIBUTION AND ITS APPLICATION
Authors: Aydın Demet
Published: March 2021

In this study, a new weighted version of the inverse Rayleigh distribution based on two different weight functions is introduced. Some statistical and reliability properties of the introduced distribution including the moments, moment generating function, entropy measures (i.e., Shannon and R´enyi) and survival and hazard rate functions are derived. The maximum likelihood estimators of the unknown parameters cannot be obtained in explicit forms. So, a numerical method has been required to compute maximum likelihood estimates. Finally, the daily mean wind speed data set has been analysed to show the usability of the new weighted inverse Rayleigh distribution.
ON THE EIGENVALUES OF N-CAYLEY GRAPHS: A SURVEY
Authors: Arezoomand Majid
Published: March 2021

A graph Γ is called an n-Cayley graph over a group G if Aut(Γ) contains a semi-regular subgroup isomorphic to G with n orbits. In this paper, we review some recent results and future directions around the problem of computing the eigenvalues on n-Cayley graphs.
COUNTING THE NUMBER OF SUBGROUPS AND NORMAL SUBGROUPS OF THE GROUP U2np, p IS AN ODD PRIME
Authors: Shelash Haider Baqer
Published: March 2021

The aim of  this paper is to compute the number of subgroups and  normal subgroups of the group $U_{2np}=\langle a,b\mid a^{2n}=b^{p}=e, aba^{-1}=b^{-1} \rangle$, where $p$ is an odd prime. Suppose $n=2^r\prod_{1 \leq i \leq s}p_{i}^{\alpha_{i}}$ in which $p_i$'s are distinct odd primes, $\alpha_i$'s are positive integers and $t=\prod_{1 \leq i \leq s}p_{i}^{\alpha_{i}}$. It is proved that the number of subgroups is $2\tau(2n)+(p-1)\left(\tau(\frac{n}{p})+\tau(\frac{n}{2^r}) \right)$, when $p \mid n$ and $2\tau(2n)+(p-1) \left[ \tau(t)\right]$, otherwise. It will be also proved that this group has $\tau(2n)+\tau(n)$ normal subgroups.
A SOLUTION ALGORITHM FOR p-MEDIAN LOCATION PROBLEM ON UNCERTAIN RANDOM NETWORKS
Authors: Soltanpour Akram , Baroughi Fahimeh , Alizadeh Behrooz
Published: March 2021

This paper investigatesthe classical $p$-median location problem in a network in which some of the vertex weights and the distances between vertices are uncertain and while others are random. For solving the $p$-median problem in an uncertain random network, an optimization model based on the chance theory is proposed first and then an algorithm is presented to find the $p$-median. Finally, a numerical example is given to illustrate the efficiency of the proposed method
SOME PROPERTIES OF BIVARIATE FIBONACCI AND LUCAS QUATERNION POLYNOMIALS
Authors: Özkoç Öztürk Arzu , Kaplan Faruk
Published: March 2021

In this work, we introduce bivariate Fibonacci quaternion polynomials andbivariate Lucas quaternion polynomials. We present generating function,Binet formula, matrix representation, binomial formulas and some basicidentities for the bivariate Fibonacci and Lucas quaternion polynomialsequences. Moreover we give various kinds of sums for these quaternionpolynomials.
TANGENT BUNDLE ENDOWED WITH QUARTER-SYMMETRIC NON-METRIC CONNECTION ON AN ALMOST HERMITIAN MANIFOLD
Authors: Khan Mohammad Nazrul Islam
Published: March 2021

In this paper, we have studied the tangent bundle endowed with quarter-symmetric non-metric connection obtained by vertical and complete lifts of a quarter-symmetric non-metric connection on the base manifold and, also, proposed the study of the tangent bundle of an almost Hermitian manifold and an almost Kaehler manifold. Finally, we obtained some theorems for Nijenhuis tensor on the tangent bundle of an almost Hermitian manifold and an almost Kaehler manifold.\\
SOME RESULTS ON (ϵ)- KENMOTSU MANIFOLDS
Authors: Sardar Arpan
Published: March 2021

We have studied curvature symmetries in ($\epsilon$)-Kenmotsu manifolds. Next, we have proved the non-existence of a non-zero parallel 2-form in an ($\epsilon$)-Kenmotsu manifold. Moreover, we have characterised $\phi$-Ricci symmetric ($\epsilon$)-Kenmotsu manifolds and finally, we have proved that under certain restriction on the scalar curvature $divR$=0 and $divC$=0 are equivalent, where `$div$' denotes divergence.
ETA-RICCI SOLITONS ON KENMOTSU MANIFOLD WITH GENERALIZED SYMMETRIC METRIC CONNECTION
Authors: Siddiqi Mohd Danish , Bahadır Oğuzhan
Published: March 2021

The objective of the present paper is to study the $\eta$-Ricci solitons on Kenmotsu manifold with generalized symmetric metric connection of type $(\alpha,\beta)$. There are discussed Ricci and $\eta$-Ricci solitons with generalized symmetric metric connection of type $(\alpha,\beta)$ satisfying the conditions $\bar{R}.\bar{S}=0$, $\bar{S}.\bar{R}=0$, $\bar{W_{2}}.\bar{S}=0$ and $\bar{S}.\bar{W_{2}}=0.$. Finally, we construct an example of Kenmotsu manifold with generalized symmetric metric connection of type $(\alpha,\beta)$ admitting $\eta$-Ricci solitons.
LEGENDRE CURVES ON 3-DIMENSIONAL f-KENMOTSU MANIFOLDS ADMITTING SCHOUTEN-VAN KAMPEN CONNECTION
Authors: Mondal Ashis
Published: March 2021

In the present paper, biharmonic Legendre curves with respect to Schouten-Van Kampen connection have been studied on three-dimensional f-Kenmotsu manifolds. Locally $\phi $-symmetric Legendre curves on three-dimensional f-Kenmotsu manifolds with respect to Schouten-Van Kampen Connection have been introduced.Also slant curves have been studied on three-dimensional f-Kenmotsu manifolds with respect to Schouten-Van Kampen connection. Finally, we constract an example of a Legendre curve in a 3-dimensional f-Kenmotsu manifold.
THE D_p^q (∆^+r )-STATISTICAL CONVERGENCE
Authors: Boztaş Neslihan , Küçükaslan Mehmet
Published: March 2021

Let p(n) and q(n) be nondecreasing sequence of positive integers such that p(n) < q(n) and limn→∞ q(n) = ∞ holds. For any r ∈ Z^+, we define D_p,q^+r- statistical convergence of ∆^+r x where ∆^+r is r- th difference of the sequence (x_n). The main results in this paper consist in determining sets of sequences χ and χ' of the form [D_ p^q]_0 α satisfying χ ⊂ [D_p^q]_0(∆^+r ) ⊂ χ ' and sets φ and φ' of the form [D_p^q]_α satisfying φ ≤ [D_p^q]_∞(∆^+r ) ≤ φ'  .
NEW APPROACHES ON DUAL SPACE
Authors: Durmaz Olgun , Aktas Busra , Gündoğan Halit
Published: March 2021

In this paper, we give how to define the basic concepts of differential geometry on Dual space. For this, dual tangent vectors that have p as dual point of application are defined. Then, the dual analytic functions defined by Dimentberg are examined in detail, and by using the derivative of the these functions, dual directional derivatives and dual tangent maps are introduced.
SOLVABILITY FOR A CLASS OF NONLINEAR CAPUTO-HADAMARD FRACTIONAL DIFFERENTIAL EQUATIONS WITH p-LAPLACIAN OPERATOR IN BANACH SPACES
Authors: Derbazi Choukri
Published: March 2021

This paper is devoted to the existence of solutions for certain classes of nonlinear differential equations involving the Caputo-Hadamard fractional-order with $\mathrm{p}$-Laplacian operator in Banach spaces. The arguments are based on M\"{o}nch's fixed point theorem combined with the technique of measures of noncompactness. An example is also presented to illustrate the effectiveness of the main results.
SPACELIKE TRANSLATION SURFACES IN MINKOWSKI 4-SPACE E_1^4
Authors: Büyükkütük Sezgin , Öztürk Günay
Published: March 2021

In the present paper, we consider spacelike translation surfaces in $4$-dimensio\-nal Minkowski space. We characterize such surfaces in terms of their Gaussian curvature and mean curvature functions. We classify flat and minimal spacelike translation surfaces in $\mathbb{E}_{1}^{4}$.
ON THE NUMERICAL RANGE OF EP MATRICES
Authors: Pappas Dimitrios
Published: March 2021

In this work we study the numerical range $W(T)$ of EP matrices or operators having a canonical form $T =  U(A\oplus 0)U^* $ in the case when $0 \notin W(A)$. As a result, we define the distance $d(W(A,T))$ between the sets $W(A)$ and $W(T)$ and investigate their connenctions, giving also upper and lower bounds for the distance $d(W(A^{-1},T^\dagger))$.   Finally we present the form of their angular numerical range $F(T)$ and its connection with $F(T^\dagger)$.
SOME NOTES ON KENMOTSU MANIFOLD
Authors: Yoldaş Halil İbrahim , Yasar Erol
Published: March 2021

In the present paper, we deal with a Kenmotsu manifold $M$. Firstly, we study the notion of torse-forming vector field on such a manifold. Then, we investigate some curvature conditions such as $Q.\mathcal{M}=0$ and $C.Q=0$ on such a manifold and obtain some necessary conditions for such a manifold given as to be Einstein and $\eta-$Einstein. Also, we study a Kenmotsu manifold $M$ admitting a Ricci soliton and give an example for this manifold.
ON PSEUDO-HERMITIAN MAGNETIC CURVES IN SASAKIAN MANIFOLDS
Authors: Guvenc Saban , Ozgur Cihan
Published: March 2021

We define pseudo-Hermitian magnetic curves in Sasakian manifolds endowed with the Tanaka-Webster connection. After we give a complete classification theorem, we construct parametrizations of pseudo-Hermitian magnetic curves in $\mathbb{R}^{2n+1}(-3)$.
SOLITARY WAVE SOLUTIONS FOR SPACE-TIME FRACTIONAL COUPLED INTEGRABLE DISPERSIONLESS SYSTEM VIA GENERALIZED KUDRYASHOV METHOD
Authors: Gaber Ahmed , Ahmad Hijaz
Published: March 2021

In this article, space-time fractional coupled integrable dispersionless system is considered, and we use fractional derivative in the sense of modified Riemann-Liouville. The fractional system has reduced to an ordinary differential system by fractional transformation and the generalized Kudryashov method is applied to obtain exact solutions. We also testify performance as well as precision of the applied method by means of numerical tests for obtaining solutions. The obtained results have been graphically presented to show the properties of the solutions.