bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of local fractional coupled Helmholtz and coupled Burgers' equations in fractal media
Authors: Dubey Ved Prakash ,   Faculty of Mathematical and Statistical Sciences, Shri Ramswaroop Memorial University, Barabanki-225003, Uttar Pradesh, India, Singh Jagdev , Alshehri Ahmed M. , Dubey Sarvesh , Kumar Devendra ,   Department of Mathematics, JECRC University, Jaipur-303905, Rajasthan, India,   Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics, Faculty of Sciences, King Abdulaziz University, Jeddah, 21589, Saudi Arabia,   Department of Physics, L.N.D. College (B.R. Ambedkar Bihar University, Muzaffarpur), Motihari-845401, Bihar, India,   Department of Mathematics, University of Rajasthan, Jaipur-302004, Rajasthan, India
Published: February 2022

In this paper, we present a computational algorithm, namely, local fractional natural homotopy analysis method (LFNHAM) to explore the solutions of local fractional coupled Helmholtz and local fractional coupled Burgers' equations (LFCHEs and LFCBEs). This work also investigates the uniqueness and convergence of the solution of a general local fractional partial differential equation (LFPDE) obtained by the suggested method in view of theory of fixed point and Banach spaces. Furthermore, the error analysis of the LFNHAM solution is also discussed. Moreover, the numerical simulations are presented for each of the local fractional coupled equations on the Cantor set. The computational procedure clearly illustrates the validity and reliability of the proposed method for achieving the solutions of local fractional coupled Helmholtz and coupled Burgers' equations. The proposed method also minimizes the computational work unlike other conventional methods while still giving extremely precise results. The implemented combination supplies a more general solution as compared to other methods and assimilates their consequences as a special case. In addition, the acquired solutions are also in excellent match with previously determined solutions.
Robust and efficient estimation for nonlinear model based on composite quantile regression with missing covariates
Authors: Zhao Qiang ,   School of Mathematics and Statistics, Shandong Normal University, Jinan 250014, China, Zhang Chao , Wu Jingjing , Wang Xiuli ,   Department of Mathematics and Statistics, University of Calgary, Calgary, AB, Canada
Published: February 2022

In this article, two types of weighted quantile estimators were proposed for nonlinear models with missing covariates. The asymptotic normality of the proposed weighted quantile average estimators was established. We further calculated the optimal weights and derived the asymptotic distributions of the correspondingly resulted optimal weighted quantile estimators. Numerical simulations and a real data analysis were conducted to examine the finite sample performance of the proposed estimators compared with other competitors.
Large-Scale Commodity Knowledge Organization and Intelligent Query Optimization
Authors: Zhou Ya
Published: February 2022

The Internet is facing the era of knowledge interconnection Web3.0, and its goal is to realize a more intelligent network that can be understood by both humans and machines. In this environment, various types of knowledge graphs have emerged. Because of the heterogeneity of knowledge, commodity knowledge makes its management more challenging. A large-scale product knowledge organization framework is designed, objective product classification knowledge is combined with subjective user perspectives in the framework, a neural network-based learning index technology is proposed to improve query efficiency. According to the properties of the knowledge structure and the characteristics of query requirements, a connection strategy is realized based on sub-variable combination.The experimental results show that, compared with the existing knowledge management system, the proposed method has a significant improvement in the retrieval efficiency of large-scale commodity knowledge.
Effect of Polypropylene (PP) and Polyacrylonitrile (PAN) Fibers Reinforced Acrylic Resin on Compression, Hardness and Surface-Roughness for Denture Applications
Authors: Sharhan Hassan A. , Rasheed Zaynab N. , Oleiwi Jawad K.
Published: February 2022

Poly methyl methacrylate PMMA polymer is used continuously and popular in dental applications during the previous years because it has a set of good properties, including ease of manufacture, light weight, low cost and others. Yet, it has weak mechanical properties under pressure for a long time. The aim of this research was to manufacture composite material with advance mechanical properties by adding two types of fibers, (polypropylene PP and Poly acrylonitrile PAN) to the matrix polymer PMMA. In this research, groups of composite samples were prepared with selected weight ratios of both fibers (1.5, 3.5, 5.5 and 7.5 wt. %). Compression strength, hardness value and surface roughness in addition to the Morphology examination were the properties that been evaluated in the normal circumstances. The results showed an increase in compressive strength, hardness and surface roughness, during the increase of reinforcing ratio of the fibers. There was a clear increase in the compressive strength during the increase in the weight ratio of both types of fibers, the largest value was (300MPa) for PMMA/PAN samples that obtained at the highest reinforcing ratio compared to (240 MPa and 119 MPa) PMMA/PP and the neat PMMA, respectively. The hardness increases noticeable with the increase of both type of fibers the reinforcement ratio, and reaches its highest value at the ratio of (7.5wt.%) for both type (87), compared to the neat sample (81). On the other hand, surface roughness increased during the increase of fibers ratio used which negatively affected the samples comparing to the neat polymer. Through SEM test, it was found that the fracture surface of the neat PMMA was homogeneous, while it is almost continuous for both PMMA/PP and PMMA/PAN.
Experimental Investigation on Slip Conditions during Thread Rolling with Flat Dies
Authors: Volz Stefan , Groche Peter
Published: February 2022

Rolling operations with flat dies allow the highly efficient production of cylindrical parts in large quantities. [1] Latest trends towards shorter lifecycle times and increasing product complexity [2] strengthen the need for an efficient design process of flat die rolling operations. Finite element modelling plays a major role in establishing an efficient design process. Precise modelling of the friction conditions during rolling operations with flat dies is still posing a challenge today. [3] The present work aims to experimentally identifying the limits of rolling of an axisymmetric part, using flat dies. By gradually increasing the stroke rate, the process limits caused by excessive slippage are determined for six different tribological systems. The workpiece rotation and tool movement is measured optically by using a digital camera system. Large differences in slippage are observed, depending on the tribological system. While systems with polymer based lubricants show excessive slippage at low stroke rates, systems using oil or no lubricant bear higher stroke rates before process limits are reached. Furthermore the optical measurements reveal that slip may also occur without complete process failure leading to the assumption that the process limit of excessive slippage in rolling operations is rather fluent than binary. Based on this experimental data, future investigations will focus on methods to predict these process limits through FEM using advanced friction modelling and tribometer tests.
Synthesis and Photocatalytic Application of Mn3O4/CdS Composite
Authors: Liu Zhe Yuan , Qiu Ling Fang , Duo Shu Wang , Lu Jin Yong , Hou Ying Ying
Published: February 2022

In this work, CdS nanosheets were synthesized by microwave hydrothermal method. We used a simple synthesis method to prepare Mn3O4/CdS composites. The crystal phase, surface chemical component and optical properties of Mn3O4/CdS, Mn3O4 and CdS were analyzed based on the characterizations such as XRD, FT-IR, DRS and PL. Mn3O4/Cd composites showed obvious broadened visible-light adsorption at wavelength over 460 nm. When the mass ratio of Mn3O4 and CdS was 1.0%, Mn3O4/CdS displayed the best RhB degradation efficiency which was 22.39% higher than the pure CdS. The improved photocatalytic efficiency should be attributed to the lower photo-induced electron–hole pair recombination rate and accelerated transfer rate of photogenerated electrons based on heterojunction structure. The achievements provided new way to exploring novel CdS-based heterojunctions for decomposing organic pollutants.
Numerical Analysis Growth Kinetics of Dendrite Tip during Laser Welding Nickel-Based Single-Crystal Superalloy Part I: Supersaturation-Driven Dendrite Growth
Authors: Gao Zhi Guo
Published: February 2022

When three welding conditions, including welding configuration, welding speed and laser power, are sequentially altered, supersaturation of liquid aluminum is crystallography-dependently determined to limit growth kinetics of dendrite tip with decease of thermo-metallurgical factors for solidification cracking to salvage the weld properties during emerging laser welding repair of multicomponent nickel-based single-crystal superalloy. After comparing growth crystallography between right side and left side of weld, the distribution of supersaturation of liquid aluminum is axis- symmetrically developed by favorite (001)/[100] dendrite growth kinetics, while the distribution is nonaxisymmetrically developed by detrimental (001)/[110] dendrite growth kinetics. High heat input is inappropriately procured by either high laser power or slow welding speed to insidiously boost supersaturation of liquid aluminum, worsen alloying partition and solute copiousness, heterogeneously exacerbate morphology and size of dendrite growth, whereby stray grain formation is strongly produced. In order to ameliorate dendrite growth, low heat input is usefully rendered by either low laser power or high welding speed to attenuate supersaturation of liquid aluminum, narrow solidification temperature range and obviate dendrite tip undercooling alongside columnar interface in order to augment crack-resistant dendrite of epitaxial growth. The overall supersaturation of liquid aluminum is crystallography-dependent. During across whole melt-pool solidification interface, supersaturation of nonsymmetric (001)/[110] welding configuration is not as small as symmetric (001)/[100] welding configuration under well-controlled heat input, thereby fosters the kinetic factors for stray grain development to obstruct columnar dendrite and consequently weaken unidirectional morphology. It is crystallographically favorable for relief of supersaturation with axis- symmetrical dendrite growth. The mechanism of crack-vulnerable dendrite growth elimination through circumspect improvement of supersaturation-controlled growth kinetics is constructively proposed for feasible crackless rejuvenation of laser welding or laser cladding. The theoretical predictions are scrupulously supported by corroborative metallograph observation.
Frictional Properties of Element- and Compound-Doped Diamond-Like Carbon Films under Boundary Lubrication with Synthetic Base Oil
Authors: Okubo Hikaru , Sasaki Shinya
Published: February 2022

The frictional properties of diamond-like carbon (DLC) films under boundary lubrication with a synthetic base oil were investigated. The specimens tested were a-C:H, Cr-a-C:H, Ti-a-C:H, W-a-C:H, WC-a-C:H, Mo-a-C:H, MoS2-a-C:H, and Sn-a-C:H films. The tribological properties of DLC/steel contacts were evaluated using a reciprocating-type cylinder-on-disk tribotester. The DLC films exhibited different frictional properties depending on the type of doping elements and compounds used. Notably, the Sn-a-C film gave the lowest friction. The friction tests and static contact angle analyses revealed that the average friction coefficient decreased with a decrease in the static contact angle of the worn DLC film surface, demonstrating that the DLC films with relatively high surface wettabilities exhibited relatively low friction properties. Therefore, surface wettability plays an important role in determining the frictional properties of DLC films under boundary lubrication with synthetic base oil..
New Developments in Phosphate Free Lubrication
Authors: Hollmann Frank , Shi Yin Feng
Published: February 2022

The classical tribological systems which are used in cold forming are still based on zinc phosphate as a separation layer and soap as a lubricant. Due to the globalization more and more processes are required following a globalized environmental protection and chemical registration concept. Therefore, the search for resource-efficient and environmentally friendly pretreatment concepts in cold forming are essential to fulfill these demands. One possible solution can be found in the phosphate free cold forming processes. Globally seen, there are different development routes to gain phosphate free tribological systems. On one hand, lubricants have been developed which are working without a conversion layer but leading to less forming performance which is often unacceptable out of profitability. On the other hand, there is the possibility to use a zinc phosphate free conversion coating layer to realize a phosphate free tribological system, without leaving the common system consisting out of a separation layer with a lubricant on top through remaining the same performance known from common systems. Beside this, it is discussed how a further development concept of this system leads to easier and shorter processes introducing a reactive lubricant concept. With the help of the reactive lubricant it is possible to apply a separation layer and a lubricant in one treatment step and obtain a phosphate free separation layer with a self-assembled lubricant on top. This system enables to realize a phosphate-free cold-forming process without changing the application of the lubricant and the forming process.
Fabrication of Titanium Coatings for Medical Device Applications
Authors: Zhou Hong , Peng Cheng
Published: February 2022

Titanium is widely used for medical purposes. It related to bone repair because of its favorable mechanical properties and biocompatible ability to osseointegrate in host bone tissue. A good and lasting connection of the implant with the bone tissue is possible when there are sufficient conditions for the bone to grow into the pores of the material, therefore the use of a porous titanium coating may be helpful in solving this problem. In this paper, shrouded plasma spray is used to produce low oxide containing titanium coatings and lower the cost as titanium is a very reactive metal at high temperatures. A solid conical shroud was designed for plasma spray. The titanium coatings were assessed by scanning electron microscopy and energy dispersive X-ray spectroscopy. An analysis in microstructure had been carried out. The results showed that the shroud attachment played an important role in protecting the titanium particles in flight during the process of plasma spraying. An enhanced microstructure with moderate porosity in the titanium coatings plasma sprayed with the shroud was observed. The reduction in air entrainment with the shroud resulted in a good heating of the particles. The plasma-sprayed titanium coating was mainly composed of α-Ti with a low quantity of TiO.
Interfacial Phenomena and Microstructure of Copper/Steel Bimetal Structure Produced by a New Hybrid Additive Manufacturing Process Combining Selective Laser Melting and Directed Energy Deposition
Authors: Zhang Wen Qi , Zhang Bao Peng , Xiao Haif Feng , Zhu Hai Hong
Published: February 2022

As a novel exploration, the hybrid additive manufacturing (AM) process combining selective laser melting (SLM) and directed energy deposition (DED) was used to produce a copper/steel bimetal structure in this paper. Stainless steel was deposited on the SLMed Cu-Cr alloy substrate successfully by DED. The interfacial phenomena, microstructure, and forming mechanism were investigated systematically. The Cu element of the substrate flowed up due to the Marangoni flow, and liquid phase separation occurred during the process. This work indicates that the microstructure and morphology between the cladding layer of steel and Cu-Cr substrate are significantly influenced by the laser power.
Monotonicity results for quasilinear fractional systems in epigraphs
Authors: Le Phuong
Published: February 2022

We prove the monotonicity of positive solutions to the quasilinear fractional system

\begin{cases} (-\Delta)^s_p u = f(x,u,v) &\text{in } \Omega,\\ (-\Delta)^t_q v = g(x,u,v) &\text{in } \Omega,\\ u=v=0 &\text{in } \mathbb{R}^n\setminus \Omega, \end{cases}

where

\Omega

is a coercive or non-coercive epigraph, such as the halfspace

\mathbb{R}^n_+

,

0<s,t<1

and

p,q\ge2

. By combining a new decay at infinity principle with the direct method of moving planes, we improve recent works in the literature even in the case of a single equation.
Etude ethnobotanique sur Euphorbia heterophylla en Côte d’Ivoire
Authors: Dingui Joël Aholié , Brou Casimir Yao , Kouakou David N’goran , Zirihi Noël Guédé
Published: February 2022

En vue de mieux appréhender le niveau de connaissance de la population ivoirienne sur l’espèce Euphorbia heterophylla et d’enrichir la pharmacopée ivoirienne, une étude ethnobotanique a été réalisée. Elle s’est faite à partir d’une prospection au cours de laquelle des échantillons de plantes ont été prélevés dans les cinq zones géographiques de la Côte d’Ivoire, suivie d’une enquête dans certaines localités. La prospection a permis de ressortir 3 morphotypes caractérisés par 3 formes de tige : unique, peu ramifiée et très ramifiée ainsi que 3 formes de feuilles : ovale, violon et lancéolée. Sur le plan culturel, l’étude a révélé que 75% des personnes enquêtées connaissent la plante, 55% la considèrent comme mauvaise herbe, 13,39% estiment qu’elle sert à prodiguer des soins de santé aux humains. L’organe le plus utilisé est la feuille pour les soins à 100%. Le mode de préparation le plus utilisé est le broyage de feuilles fraîches ou l’expression. Les modes d’applications sont surtout cutanés (90%). Elle est fréquemment utilisée pour le traitement du paludisme, soit 33% des cas. Les autres soins prodigués allaient contre les maladies infantiles dont la fièvre (11%) et d’autres maux. Ces résultats peuvent servir de base de recherches en phytochimie et en pharmacologie.

 

English title: Ethnobotanical study on Euphorbia heterophylla in Côte d'Ivoire

In order to better understand the level of knowledge of the Ivorian population on the species Euphorbia heterophylla and to enrich the Ivorian pharmacopoeia, an ethnobotanical study was carried out. It was based on a survey during which samples of plants were taken in the five geographical areas of Côte d'Ivoire, followed by a survey in some localities. The survey allowed us to identify 3 morphotypes characterized by 3 stem shapes: single, little branched and very branched as well as 3 leaf shapes: oval, violin and lanceolate. On the cultural level, the study revealed that 75% of the people surveyed know the plant, 55% consider it as a weed, 13.39% believe that it is used to provide health care to humans. The most used organ is the leaf for health care at 100%.
Effet du déficit hydrique induit par l’agar-agar sur la croissance des vitroplants de deux morphotypes de voandzou (Vigna subterranea L. Verdc.)
Authors: Toure Yaya , Kone Tchoa , Coulibaly Lacina Fanlégué , Silué Nakpalo , Kone Mongomaké
Published: February 2022

Le voandzou (Vigna subterranea L.) est l’une des légumineuses à graines tropicales généralement cultivé dans les régions à faible pluviométrie. Cette étude visait à déterminer le comportement des morphotypes Ci2 et Ci4 de voandzou en conditions de déficit hydrique. Les vitroplants issus du développement des axes embryonnaires des graines et âgés de dix jours, ont été transférés sur le milieu de base de Murashige et Skoog (½MS0) solidifié avec différentes concentrations d’agar-agar (6 g/l, 12 g/l, 18 g/l, 24 g/l, 30 g/l, 36 g/l) pour induire le déficit hydrique. Après 30 jours d’incubation, l’évaluation des vitroplants a montré que l’effet du déficit hydrique sur leur croissance a varié selon l’organe et le morphotype utilisé. Le système racinaire des plantules a été plus affecté par le déficit hydrique comparativement au système aérien. Les taux de réduction de la hauteur des plantules, du nombre de feuilles, de la biomasse fraîche aérienne et de la biomasse sèche racinaire ont respectivement été de 39,46%, 16,66%, 72,88%, 29,39%, 32,50%, 52,25% pour le morphotype Ci2 et de 45,94%, 39,40%, 72,15%, 53,80%, 39,18% 67,93% pour le morphotype Ci4. La réduction de la croissance consécutivement au déficit hydrique induit par l’agar-agar a été plus importante avec le morphotype Ci4. Aussi, le morphotype Ci2, dont la réduction de la croissance a été moins affectée est considéré comme étant le plus tolérant au déficit hydrique.

 

English title: Effect of water deficit induced by agar-agar on the vitroplants growth of two landraces of voandzeia (Vigna subterranea L. Verdc.)

Voandzeia (Vigna subterranea L.) is one of the most common tropical legumes grown in low rainfall areas. The objective of this study were to determine the behavior of two landraces (Ci2 and Ci4) under water deficit conditions. Vitroplants from the development of the embryonic axes of seed, aged ten days, were transferred to the base medium of Murashige and Skoog (½MS0) solidified with different concentrations of agar agar (6 g/l, 12 g/l, 18 g/l, 24 g/l, 30 g/l, 36 g/l) to induce water deficit. After 30 days of incubation, vitroplant evaluation showed that the effect of water deficit on growth varied depending on organ and landrace used. Seedling root systems were more affected by water deficit than the aerial system. The reduction rates of seedling height, leaf number, aerial fresh biomass, and root dry biomass were respectively 39.46%, 16.66%, 72.88%, 29.39%, 32.50%, 52.25% for landrace Ci2, and 4 5.94%, 39.40%, 72.15%, 53.80%, 39.18% 67.93% for landrace Ci4. The reduction in growth following agar-agar induced water deficit was greater with morphotype Ci4. Also, landrace Ci2, whose reduction in growth has been less affected, is considered to be the most water deficit tolerant.
Relation entre le taux de réussite académique et l’alimentation et les conditions de vie, les qualités nécessaires à l’apprentissage, et la relation entre étudiants et enseignants à l’Université de Pala, Tchad
Authors: Ndouyang Collinlaw Joseph , Riminan Nguémadjita , Adoum Minallah , Djikoloum Patrice
Published: February 2022

Les études universitaires au Tchad sont confrontées à des multiples difficultés. Ces difficultés entravent le succès académique, perturbent l’acquisition des connaissances et annihilent la performance. Cette étude vise à améliorer le taux de réussite par la maîtrise des facteurs d’échec académique. Ainsi, une étude sur les causes d’échec a été menée auprès des étudiants de licence 1 et 2 par un questionnaire. Les étudiants ayant pris part à l’enquête ont été soumis aux questions dans l’anonymat. Le dépouillement et les calculs de fréquences ont été effectués par Excel. Les classifications ascendantes hiérarchiques (CAH), les analyses en composantes principales (ACP), les tableaux de corrélation de Pearson ont été effectués par XLSTAT au seuil  = 0,05. Les réponses ont révélé que l’échec des étudiants en première année résultent d’une part des difficultés liées à l’alimentation, au déplacement ou transport, et d’autre part, au manque des qualités nécessaires à l’acquisition des connaissances et des compétences, au déficit de rapprochement entre enseignants et étudiants. Bien qu’il y ait de restrictions financières, les étudiants doivent lever les difficultés en matière d’organisation pour mieux se porter à l’aise et réussir dans leurs parcours universitaires. Des coopérations entre eux-mêmes et avec les enseignants leur sont nécessaires.

 

English title: Relationship between academic success rate and food ingestion, life conditions, necessary qualities for learning, and relationship between students and teachers at the University of Pala, Tchad

Studies at universities in Tchad are faced to multiple difficulties. These difficulties prevent academic success, disturb learning and reduce excellence. This study aim at improving success rate by a management against academic failure factors. In this way, a study about failure causes was lead towards students of licenses1 and 2 by a survey. Students who have participated the survey have been submitted to questions without giving their names. Counting of survey sheets and calculation of frequencies were realized by Excel. The hierarchical ascendant classifications (HAC), the principal components analysis (PCA), Pearson correlation tables were purchased by XLSTAT at threshold α=0.05. Results revealed that students failed to succeed at Level 1 and 2 bachelors, at one hand, difficulties are linked to food ingestion, to transport, and at other hand, to lack of necessaries qualities for learning and of bringing closer deficit between teachers and students. Although financial limitations exist, students must avoid difficulties by organizing easy plans in order to succeed at university. Cooperation between the very students and teachers are necessaries for improving success.
Potential Impacts of Oil and Grease on Algae, Invertebrates and Fish in the Bujagali Hydropower Project Area
Authors: Wanda Masifwa Fred , Matuha Moureen , Magezi Godfrey , Nabwire Racheal , Amondito Brenda
Published: February 2022

This study determined the concentration of oil and grease and inferred its impacts on algae, invertebrates and fish. Water samples were collected in April and September from 2012 to 2018 at the upstream and downstream transects and in the reservoir, and analysed for oil and grease following standard procedures. Environmental compliance was compared to NEMA’s discharge standard of 10 mg/l, and its PAH effluent discharge standard of ≤ 0.1 mg/l. At all sites, average concentrations of oil and grease were below 10 mg/l throughout the sampling period. Out of the 14 data sets for each transect, only 3 along the upstream transect, and 2 at each of the downstream transect and the reservoir were compliant with the effluent discharge standard. Although impacts of oil and grease on aquatic biota were not assessed, their relatively high concentration compared to total Polycyclic Aromatic Hydrocarbon (> 0.1 µg/l) is considered hazardous to most aquatic organisms. The diverse activities around the project area implied that sources of oil and grease were proportionately diverse. Hence, the observed trends may not solely be attributed to the hydropower project. Accordingly, assessment of the various sources of oil and grease and their impact on aquatic biota in the area is recommended.
Profit Indices in Nile tilapia (Oreochromis Niloticus L.) Fed on Peanut-Based Meals as Alternatives to Dietary Fishmeal in Grow-Out Earthen Ponds
Authors: Musita Apollo Augustus , Ogello Erick , Balirwa John Stephen , Bassa Samuel
Published: February 2022

Persistence of dietary fishmeal probably accounts for the low profitability in farmed Nile tilapia in Uganda. A 24 week field study was conducted in Busoga sub-region of Eastern Uganda to compare profit indices in pond cultured Nile tilapia fed on peanut-based meals as alternatives to dietary fishmeal. It consisted of an experiment and sample survey that targeted fish biomass production and input-output valuation respectively. Each of the 12 earthen ponds measuring 12 cubic meters were stocked with 48 ‘all male’ Nile tilapia (Oreochromis niloticus L.) fingerlings of mean initial weight of 21.7 grams. Iso-nitrogenous diets containing 30% and 25% Crude Protein were applied for the first eight and last four respectively. Dietary treatments included fishmeal-based diet and two peanut-based diets; peanut meal-based diet and mixed plant-based diet. Profit indices for the fishmeal and mixed plant-based- diets were not significantly different (p>0.05). On the contrary, the Profit index characteristic to the PNM-based diet was significantly lower (p≤0.05) than the other test diets. Accordingly, the mixed plant meal should be used for complete substitution of dietary fishmeal in pond cultured Nile tilapia.
Dancehall w Polsce i na Jamajce - analiza porównawcza twórczości artystycznej ze szczególnym uwzględnieniem warstwy słownej
Authors: Radzikowski Łukasz
Published: February 2022

Głównym celem artykułu jest zapoznanie czytelnika z historią i różnicami pomiędzy muzyką oraz kulturą dancehall na Jamajce i w Polsce. Dodatkowym zadaniem jest ustalenie, jak kształtuje się tożsamość polskich twórców dancehallu. W artykule zestawiono dostępne badania wyróżniające główne motywy słowne jamajskiego dancehallu z analizą tekstów polskich utworów tego gatunku. Analiza pokazuje, że istnieją znaczące różnice pomiędzy praktykowaniem dancehallu w Polsce a na Jamajce. Szczególną odmienność widać w tekstach utworów. Tożsamość polskiego twórcy dancehallu wydaje się z kolei być niejasna i trudna do zdefiniowania. DANCEHALL IN POLAND AND JAMAICA – A COMPARATIVE ANALYSIS OF ARTISTIC CREATION WITH PARTICULAR EMPHASIS ON THE LYRICAL CONTENT The main objective of this article is to familiarize the reader with the history and differences between dancehall music and culture in Jamaica and Poland. An additional task is to determine the identity of Polish dancehall artists. The article compares the available research distinguishing the main lyrical themes of the Jamaican dancehall with the analysis of Polish lyrics of this genre. The analysis shows that there are significant differences between practicing dancehall in Poland and in Jamaica. A particular difference can be seen in the lyrics of the songs. The identity of the Polish dancehall creator seems to be unclear and difficult to define.
Overview of Some Learning Methods for Early Childhood
Authors: Wahyuni Vera Sri , Laksito Grida Saktian
Published: February 2022

Choosing a learning method in early childhood education is a method used by educators in carrying out learning activities for children to achieve certain competencies optimally. The purpose of this review of several learning methods in early childhood education is to obtain information about the growth and development that has been achieved by him during his education in learning in early childhood education. There are several lessons in early childhood education, and each method has its advantages and disadvantages. Based on the results of the discussion, it is known that each learning method in early childhood education has advantages and disadvantages. Therefore, educators in early childhood must be able to choose an appropriate method according to the goals, situations and conditions of their students.
Teologi Misi Bagi Gerakan Misi dan Komunikasi Kristen Pasca Pandemi Covid-19
Authors: Tanhidy Jamin
Published: February 2022

Hakekat teologi misi berupa Missio Dei, Missio Christos, dan Missio Ecclesiae  adalah misi Allah (God’s Mission) berupa aktifitas Allah Tritunggal (The Truine God) menebus dunia ciptaan-Nya dari kebinasaan akibat dosa. Kerangka pemikiran teologis ini menjadi dasar pemikiran yang melandasi gerakan misi dan komunikasi Kristen pasca pandemi Covid-19 atau Era New Normal. Olehnya, gereja diajak untuk memikirkan ulang dan merekonstruksi strategi misinya dengan sikap non-eksklusif, toleran dan melayani secara holistik. Metode penelitian yang dipakai berupa studi perpustakaan dengan mengkaji teks-teks alkitab, jurnal penelitian dan buku-buku yang berkaitan dengan topik atau judul penelitian guna menjawab masalah penelitian. Hasil penelitian menemukan bahwa gereja perlu memberi perhatian yang lebih besar kepada isu-isu global kemanusian, mengalakkan dialog konstruktif dan terbuka dengan penganut agama lain dan meningkatkan intensitas pemanfaatan media sosial dan komunikasi virtual dalam menyampaikan dan menyebarluaskan berita Injil.
Makna Penebusan Dalam Upacara Tiwah Sebagai Pendekatan Kontekstualisasi Injil
Authors: Diana Ruat , Budiman Sabda , Maharin Maharin
Published: February 2022

Budaya dalam agama Hindu Kaharingan, yaitu budaya Tiwah merupakan sebuah bentuk budaya yang dengan pelaksanaan upacara yang unik. Dalam proses pelaksaannya, upacara tiwah mengandung prosesi yang beragam dan penuh makna. Melalui makna upacara tiwah ini, penulis mengadopsikannya sebagai kontekstualisasi media untuk menyampaikan Injil. Penulis memahami pemahaman makna dan selanjutnya Kristus dalam upacara tiwah yang dilakukan oleh umat Hindu Kaharingan. Dengan menggunakan pendekatan kualitatif dan penelusuran pelaksanaan upacara Tiwah melalui wawancara dan literatur yang ada, penulis mengkaji makna dalam upacara Tiwah tersebut yang kemudian disaring dengan metode yang mengubah, dan membuah dan firman Tuhan sebagai tolak ukurnya. Yesus sebagai korban dalam upacara tiwah, Yesus sebagai jalan menuju “Lewu Tatau” , dan Yesus sebagai pengantara antara manusia dan “Ranying Hatalla”. Poin-poin tersebut menjadi hasil pembahasan dalam pendekatan kontekstualisasi Injil dalam upacara Tiwah.
Mapa conceitual enquanto instrumento de avaliação da prática docente: desafios no contexto da pandemia em Tefé – AM
Authors: Poquis Mery Ana Pacaya , Rabelo Francisco Davy Braz
Published: February 2022

Diante do cenário pandêmico da covid-19, houve grandes mudanças na nova modalidade de ensino. É importante compreender e discutir sobre a educação e a propósito o ensino remoto. O presente artigo apresenta o uso do mapa conceitual para a avaliação e desafios que os docentes estão enfrentando na pandemia na cidade de Tefé, Estado do Amazonas. Este trabalho tem como objetivo a percepção das práticas docentes da educação durante este período, a partir disso, o processo realizado consiste na avaliação dos desafios do docente na educação básica como instrumento que é necessário para identificar quais as principais limitações enfrentadas pelos mesmos no contexto pandêmico. Para tanto, a discussão aqui proposta ilustra a percepção das aulas remotas durante a pandemia, onde consiste no retrocesso do ensino de Geografia, os desafios que os docentes encaram em suas aulas, e os alunos por sua vez não têm acesso às aulas, isto é, prejudica o desenvolvimento do raciocínio geográfico destes. A discussão apresenta resultados do cenário atual através da obtenção de dados coletados na escola que indicam a importância do professor em sala de aula de forma presencial e as dificuldades destes em conseguir superar o novo modelo de ensino.
Study of Orchid Resistance from Ceratorhiza sp. Induction Against ORSV Infection Based on Root Anatomy Character
Authors: Lestari Ketut , Wahyuningsih Sri , Mahfut Mahfut , Handayani Tundjung Tripeni
Published: February 2022

Indonesia is the country that has the largest wealth of orchid germ plasma in the world. Some popular types of orchids are Phalaenopsis amabilis and Dendrobium discolor. However, efforts to plant orchids are often hampered by viral attacks, one of which is the Odontoglossum ringpot virus (ORSV). Effective virus control on orchids can be done by using mycorrhiza, one of which is Ceratorhiza. This study aimed to determine differences in the anatomical character of the roots of Phalaenopsis amabilis and Dendrobium discolor, and efficacy of Ceratorhiza sp. in encouraging orchids to overcome ORSV infection. The design used in this study was a factorial randomized design (CRD) with 6 treatments and 4 iterations. Root anatomical observations were performed by making root cross -sections stained with phloroglucin (for lignin observation) and methylene blue staining (for peloton treatment), then observed using a microscope. The results showed that Ceratorhiza sp. in Phalaenopsis amabilis and Dendrobium discolor, the thickness of lignin in the epidermis and carrier bundles was thicker than that of treatment given only for viruses and mycorrhizal viruses.
Phytoplankton in Boom Beach, Banyuwangi Regency East Java : Their Existence as a Bioindicator of Water Saprobity
Authors: Ayun Anisa Qurota , Nurwidodo Nurwidodo , Husamah Husamah
Published: February 2022

Boom Beach is used as a tourist spot and a turtle breeding place The existence of a relatively dense residential area can provide the potential for waste entering the water area. This can cause a decrease in water quality. The presence of various wastes causes pollution in the coastal area of Boom Beach. The purpose of the study was to determine the probity index of the waters of Boom Beach, Banyuwangi Regency, East Java. This research method uses quantitative methods. The results showed that there were 24 phytoplankton species, the saprobic index value was between 0.000 – 1,200 and the tropic saprobic index value was between 0.133 – 0.600. Based on the average value of the saprobic index, which is 0.657 including -Mesosaprobic and classified as a lightly polluted category for the trophic value of the saprobic index of 0.384 indicating the /α-Mesosaprobic phase and classified as a moderately polluted category.
LA SEMAINE, O ÉPICO BÍBLICO SOBRE A CRIAÇÃO
Authors: Nunes Ivanildo
Published: February 2022

A obra épica renascentista La semaine (1578), do escritor Guillaume de Saluste Du Bartas, foi publicada no período das guerras religiosas francesas. O poeta abordou em seu poema longo a criação do mundo, parafraseando o livro do Gênesis. No presente artigo exploramos por meio da Semiotização Épica do Discurso (SILVA) e de Poemas Épicos: estratégias de leitura (RAMALHO), elementos analíticos que contribuem para o estudo do gênero.
ORÍGENES DE UNA ETIOLOGIA CUBANA EN ESPEJO DE PACIENCIA (1608) DE SILVESTRE DE BALBOA VEREDAS
Authors: Marrero-Fente Raúl
Published: February 2022

Este trabajo examina la construcción de una etiología o fábula de los orígenes por Silvestre de Balboa en Espejo de paciencia (1608). A partir del uso de la mitología clásica, Balboa asigna a la naturaleza cubana un valor simbólico nuevo que permite ver el paisaje en función de un sentimiento autóctono insular, marcando la diferencia con el paisaje europeo.
KUALITAS UDARA DALAM RUANGAN SEKOLAH (PM2.5, PM10, CO2, DAN HCHO) DAN RISIKO KESEHATAN PADA SISWA DI KOTA SERANG
Authors: Andriani Sischa
Published: February 2022

Lingkungan dalam ruangan merupakan lingkungan mikro yang penting bagi siswa yang menghabiskan 6-8 jam di ruang sekolah dan rentan terhadap polusi udara. Beberapa penyakit pernapasan dalam kelompok ini terkait dengan kualitas udara yang buruk. Penelitian ini bertujuan untuk memberikan gambaran kualitas udara di lingkungan sekolah dan menilai risiko kesehatan pada siswa. Penelitian mengukur kualitas udara (PM2.5, PM10, CO2, dan HCHO) di tiga SD kemudian dilanjutkan dengan penilaian risiko kesehatan. Penelitian ini menemukan bahwa konsentrasi PM2.5 dalam ruangan (A 0,113 mg/m3; B 0,119 mg/m3; C 0,056 mg/m3) dan konsentrasi PM10 dalam ruangan (A 0,188 mg/m3; B 0,071 mg/m3; C 0,229 mg/ m3) melebihi nilai standar di semua sekolah dengan risiko kesehatan (HQ>1) untuk PM2.5 di semua sekolah dan PM10 di dua sekolah. Sedangkan konsentrasi karbon dioksida dan formaldehida masih aman dan tidak memberikan risiko kesehatan (HQ < 1). Skenario pengelolaan risiko kesehatan dari paparan PM2.5 dan PM10 adalah dengan mengontrol konsentrasi paparan pada ambang batas aman PM2.5 0,035 mg/m3; 0,043 mg/m3 dan PM10 0,144 mg/m3 untuk sebagian besar penduduk pada waktu sekolah normal. Disimpulkan bahwa kualitas udara seluruh SD dalam penelitian ini belum memenuhi standar nilai yang ditetapkan dan diperkirakan memberikan dampak kesehatan pada siswa sehingga diperlukan pengendalian risiko kesehatan.
ANALISIS FAKTOR YANG BERHUBUNGAN DENGAN PENYAKIT AKIBAT KERJA PADA KARYAWAN SMELTER ‘X’ INDUSTRI TAHUN 2020
Authors: Tri Rahayu
Published: February 2022

Pengelasan merupakan tempat kerja yang berisiko tinggi menimbulkan gangguan kesehatan. Penelitian  ini bertujuan mengidentifikasi dan menganalisis faktor yang berhubungan dengan Penyakit Akibat Kerja (PAK) pada pekerja las di Jalan A.Yani, Kota Banjarbaru. Desain penelitian adalah observasional analitik menggunakan metode cross sectional. Jumlah sampel berdasarkan quota sampling sebanyak 30 orang. Hasil menunjukkan tidak ada hubungan antara usia (p=0,513), masa kerja (p=0,729), lama kerja (p=0,337) terhadap PAK. Namun, ada hubungan pengetahuan (p=0,046) dan penggunaan APD (p=0,000) terhadap PAK. Secara simultan usia, masa kerja, lama kerja, tingkat pengetahuan, dan penggunaan APD tidak berhubungan dengan kejadian PAK pada pekerja las. Secara parsial tingkat pengetahuan dan penggunaan APD hubungan parsial yang signifikan terhadap penyakit akibat kerja pada pekerja las. Tukang las yang memiliki tingkat pengetahuan yang kurang berisiko 5,442 kali lebih besar dibanding yang memiliki tingkat pengetahuan baik. Tukang las yang tidak menggunakan minimal empat APD utama berisiko 1,000 kali lebih besar dibanding yang menggunakan minimal empat APD utama. Tidak ada hubungan yang signifikan antara usia, masa kerja, dan lama kerja dengan penyakit akibat kerja. Ada hubungan antara tingkat pengetahuan dan penggunaan APD terhadap penyakit akibat kerja.
Faktor-Faktor yang Memengaruhi Kepatuhan Peserta Mandiri Membayar Iuran BPJS di Kelurahan Cipocok Jaya
Authors: Yunita Shalsha
Published: February 2022

Badan Penyelenggara Jaminan Sosial (BPJS) merupakan badan penyelenggara yang kepesertaannya bersifat wajib sebagaimana tertuang dalam UU No.40 Tahun 2004. Di wilayah Banten, Kota Serang menduduki peringkat ke-2 sebagai wilayah dengan peserta BPJS terbanyak memiliki tunggakan dalam pembayaran BPJS di mana Kecamatan Cipocok Jaya memiliki jumlah tunggakan tertinggi yaitu 32.484 jiwa dan Kelurahan Cipocok Jaya memiliki jumlah tunggakan tertinggi sebesar 4.586 jiwa. Iuran sangat berpengaruh terhadap kelancaran berjalannya BPJS Kesehatan agar tidak terjadi defisit. Tujuan penelitian ini adalah untuk mengetahui faktor-faktor yang Memengaruhi kepatuhan peserta mandiri dalam membayar iuran BPJS di Kelurahan Cipocok Jaya. Penelitian dilakukan di Kelurahan Cipocok Jaya, Kecamatan Cipocok Jaya Kota Serang pada bulan maret- april tahun 2021. Sampel yang diambil adalah peserta BPJS mandiri sebanyak 102 orang. Desain penelitian menggunakan cross sectional dengan teknik pengambilan data purposive sampling. Analisis dilakukan dengan uji univariat dan bivariat dengan uji chi-square. Ada hubungan antara pengetahuan dengan kepatuhan peserta mandiri dalam membayar iuran BPJS (p-value = 0,000). Perlu adanya sosialisasi secara rutin dari petugas BPJS Kesehatan mengenai informasi pembayaran iuran tepat waktu.
Diseño y validación de tres pruebas de potencia aeróbica y velocidad en niños nadadores (Design and validation of three tests of aerobic power and speed in swimming children)
Authors: González Palacio Enoc Valentín , Ramírez González Andrés Felipe , Hernández Villa Alexander Mauricio
Published: February 2022

El presente artículo tuvo como finalidad el diseño y validación de tres test de campo que permiten valorar la potencia aeróbica y la velocidad en niños nadadores de 9 y 10 años, se realizó un muestreo probabilístico, aleatorio estratificado, con una muestra final de 77 deportistas. Para el proceso validación se tomaron como Gold Standar los test de: potencia aeróbica de 1000 metros y Test de velocidad de 50 y 20 metros (Jauregui y Ordoñez, 1993), frente a los test propuestos: 300 metros en estilo libre con vuelta abierta, salida desde clavado piso, y Velocidad 25 metros libre con salida clavado y 10 metros lanzados; para establecer la Confiabilidad intra, se realizó el procedimiento test re test (TRT). Resultados: Se aplicó la prueba de Shapiro – Wilk para la determinación de normalidad, en las correlaciones (ICC) inter instrumentos en las pruebas de velocidad los valores fueron aceptables (0,569) y muy buenos (0,904), en la prueba de potencia aeróbica fueron buenos (0,725 – 0,818); en las comparaciones intra instrumentos (ICC) en la velocidad los valores fluctuaron entre aceptables (0,618) y muy buenos (0,982), en la potencia aeróbica fue en general bueno (0,725 – 0,818). Finalmente se propone una escala percentilar que permite valoras las capacidades abordadas.
Abstract: The purpose of this article was to design and validate three field tests, of aerobic power and speed in 9 and 10-year-old swimmers, a probabilistic, stratified random sampling was performed with a final sample of 77 athletes. For the validation process, the tests of: aerobic power of 1000 meters and speed test of 50 and 20 meters (Jauregui and Ordoñez, 1993) were taken as Gold Standard, compared to the proposed tests: 300 meters in freestyle with open lap, exit from nailed floor, and Speed 25 meters free with nailed exit and 10 meters thrown; To establish intra-reliability, the test re test (TRT) procedure was performed. Results: The Shapiro - Wilk test was applied for the determination of normality, in the inter-instrument correlations (ICC) in the speed tests the values were acceptable (0.569) and very good (0.904), in the aerobic power test they were good (0.725 - 0.818); in intra-instrument comparisons (ICC) in speed the values fluctuated between acceptable (0.618) and very good (0.982), in aerobic power it was generally good (0.725 - 0.818). Finally, a percentile scale is proposed that allows you to assess the capabilities addressed.
KASTAMONU'NUN TARİHİ HEPKEBİRLER (KEBKEBİRLER) MAHALLESİ VE VAKIF ESERLERİ
Authors: OĞUR Özcan , EĞİLMEZ Mustafa
Published: February 2022

Kastamonu’nun tarihi mahallelerinden olan ve günümüzde Hepkebirler adıyla anılan mahalleye ilişkin bilgiler sınırlıdır. Daha çok son dönemlerdeki belgelerde Hepkebirler ismi kullanılıyorsa da, eski tarihli belgelerde mahalle isminin Kebkebirler ya da Kebkebür şeklinde geçtiği görülmektedir. Ayrıca mahallede Hepkebirler ismiyle bir cami bulunmakta ve caminin Osmanlılar zamanında yapıldığı anlaşılmaktadır. Özellikle cami avlusunda bir sahabe mezarının ve bazı büyük velilerin mezarlarının olduğu bilgisi, mahalle ismine ve tarihine yönelik bu çalışmanın ortaya konulmasının ana nedeni olmuştur. Türk mahalle yapısı göz önünde bulundurularak yapılan araştırma sonucunda, mahallenin kuruluşunda etkili olan bazı etmenler ortaya konulmuştur. Özellikle bir esnaf grubu olan “Kebkebirler” esnafının mahallenin teşekkülündeki fonksiyonu hakkında arşiv, telif ve tetkik kaynaklardan hareketle bazı çıkarımlarda bulunulmuştur. Ayrıca Ahiliğin en yaygın şekliyle yaşandığı XI. yüzyıl Anadolu’sunda, Kastamonu’daki ahi örgütlenmelerinin şehir organizasyonuna etkisi ortaya konulmaya çalışılmıştır.