bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigation of the Health Effects of Indoor and Outdoor Air Pollution from Aerosol Emission on School Children in Abakaliki, Ebonyi State, Nigeria
Authors: Okoro N.O. , Ojobeagu A.O.
Published: July 2024

The health effects of exposure of children to indoor and outdoor air pollution from aerosols (particulate matter) at schools in Abakaliki  have been studied. The aim of this study was to investigate how aerosol particles are dispersed within schools in Abakaliki and their  health related issues. The aerosol dataset used for computation and analysis was obtained by direct monitoring and measurement of air  pollution from aerosol emissions at schools in the area of study. From the results, the highest air quality indices (AQIs) values of 360 and  282 for particulate matter 2.5 (PM2.5) were obtained for outdoor and indoorair pollution at Ogoja Road Primary School. The results obtained also showed that the mean concentrations and air quality indices (AQIs) of particulate matter 2.5 (PM2.5) and particulate matter 10 (PM10) were relatively greater during the dry season than during the rainy season, mostly in the school closer to the generating  sources than the schools farther from the sources. Similarly, the concentrations of PM2.5 and PM10 obtained in the study areas were  greater than the World Health Organization (2021) guidelines for healthy air quality, which, if inhaled, may cause health problems such as  difficulty in breathing and bizarre catarrh in schoolchildren. Additionally, sources such as dust, overcrowded classrooms, school  locations close to busy roads, and combustion sites were the major contributors to air pollution from aerosols in schools at Abakaliki. This  study may aid atmospheric/environmental researchers in monitoring air pollution from aerosols and its associated impacts on our  environment for application to the good health of schoolchildren. These findings can aid policy makers in enacting guidelines and  requirements for establishing new schools. To that effect, a clean environment for the safety and good health of schoolchildren in  Abakaliki and beyond should be ensured.
Growth, yield and grain quality responses of Durum Wheat (Triticum turgidum var. durum) cultivars to irrigated and rain-fed production systems at Debre Zeit, central Ethiopia
Authors: GebreMariam Firew , Tesfaye Kindie , Balemi Tesfaye , Meseret Almaze , Geleta Negash , Ahmad Abdultif
Published: July 2024

Wheat production under the irrigation production system is a recent event in Ethiopia. There is limited information on the comparative advantage of the irrigated over rain-fed production systems on yield and grain quality of wheat. Thus, these researches were conducted to evaluate the performance of durum wheat cultivars under irrigation and rain-fed production systems. The treatments consisted of twenty durum wheat cultivars. The experiments were conducted in irrigated and rain-fed conditions for two consecutive years 2020 and 2021. Each experiment was laid out in a randomized complete block design with three replications. After the variance homogeneity test combined analysis over the production years within the production systems was conducted. The effects of production systems on the tested parameters were evaluated by pair-wise T-test analysis. The combined results over 2020 and 2021 years indicated that the tested cultivars significantly affected the growth, grain yield and quality of durum wheat in each of the production systems. In each production system combined over the production years, the cultivars Mangudo, Tesfaye, Utuba, Tate, and Hitosa recorded the highest grain yield while the cultivars Bakalcha, Toltu, Bullalla, Fetan, and Utuba registered the higher grain protein content. The cultivar Utuba combined over 2020 and 2021 years recorded the highest grain yield with greater grain protein content in the rain-fed as well as in the irrigated production systems. According to the results of the pair-wise T-test analysis, the irrigated production system increased the plant height (8.5%), productive tillers per plant (45.6%), spikelet per spike (25.8%), kernel per spike (42.1%), grain yield (40.9%), biomass yield (36%), thousand kernel weight (25%) and hectoliter weight (39%) of durum wheat compared to the rain-fed system. The irrigation production system was superior in most of the parameters of durum wheat compared to the rain-fed. Mangudo, Tesfaye, Utuba, Tate, and Hitosa could be promising cultivars for rain-fed as well as for irrigated systems for enhancing the grain yield of durum wheat in the study area and areas with similar agro-ecological conditions.
Smallholder Farmers’ Perception of Agro-ecological Practices and its determinants: Insights from RIPAT Project in Ruangwa District, Tanzania
Authors: Ringo Nickson, J. , Kessy John F. , Malisa Emmanuel, T.
Published: July 2024

It is recognized that using agro-ecological practices can guarantee sustained agricultural production, which satisfies the necessary amount of food demand. To persuade farmers to adopt agro-ecological practices, it is imperative first to understand their perception of agro-ecology approach. This study aimed to analyze farmers' perceptions of agro-ecological practices and their determinants, using data that were collected from 126 RIPAT and 126 non-RIPAT farmers who were randomly selected in Ruangwa District, Tanzania. Results revealed a significant difference in perception between RIPAT and non-RIPAT farmers. Most RIPAT farmers perceived agro-ecological practices more likely than their counterpart due to training that increased their awareness. The majority in both groups of farmers perceived the relative advantage of agro-ecological practices, particularly in environmental protection and human health and nutrition, but also considered its implementation as labor-intensive and time-consuming. Unlike non-RIPAT farmers, RIPAT farmers perceived agro-ecological practices as compatible with their social values, farming experience, and demands, and farmers can try to implement them to enhance agricultural production. The results of binary logistic regression showed that exposure to the RIPAT approach, access to information, income, and access to credit were significantly influencing farmers’ perception of agro-ecological practices. Awareness of agro-ecological practices, which could be brought about by training, increases the likelihood of positive perception of the same. Therefore, the study recommends more agro-ecological training programs to enhance farmers’ awareness and knowledge which in turn could influence their perception resulting in enhanced adoption of agro-ecological practices for sustainable food production.
Cryopreservation and artificial insemination in African Catfish (Clarias gariepinus, Burchell 1822): A review
Authors: Tilahun Gashaw , Yalew Alayu
Published: July 2024

Despite the high potential for the production of African Catfish, Clarias gariepinus, and its market demand there exists a serious lack of fish fingerlings to supply for producers and (re)stock water bodies. Unlike other species, the traditional method of obtaining C. gariepinus milt is sacrificing the male, removing its testes and macerating over the stripped and collected eggs. This is a loss for a farm as male brood stock is going to be killed every time. The C. gariepinus fish shows seasonal gonadal maturation that is usually associated with the rainy season as the hormonal level increases during this season. Recent efforts are becoming successful in multiplying C. gariepinus artificially by fertilizing the striped eggs with preserved sperm. The preservation of sperm is a means to ensure year-round availability and supply of fingerlings and overcomes the scarcity of seed. Fish sperm can be preserved in dry ice, freezing the semen and storing the frozen semen in liquid nitrogen (cryopreservation). The preservation period of fish male gamete is usually short, compared to mammals due to its biochemical structure and temperature exposure effects on the sperm cells. Hence, the paper focuses on reviewing the efforts so far made on the preservation of male C. gariepinus and the use of the preserved semen for insemination. It also addresses the methods to evaluate the quality of sperm, milt collection and preparation as well as the amount of sperm used to fertilize an egg. The aim of this review is to gather the efforts made so far on the amount of sperm required and parameters considered while evaluating the sperm, cryopreservation and artificial insemination in C. gariepinus and provide the available information for the hatcheries to have an alternative means of getting milt without sacrificing broods in the hatchery. Milt can be collected easily by dissecting the selected and matured testes with scissors, removing the two testes, cutting each testis into smaller pieces and squeezing it in a loosely woven cloth. This milt can, then, be placed in a freezer and the frozen semen can be preserved in liquid nitrogen at a temperature of -196 0C. The ratio of semen to egg in C. gariepinus fish is recommended at 6 to 24x103 semen to an egg. Cryopreservation of C. gariepinus semen in liquid nitrogen invariably helps to conserve the genetic resources of desirable male fish for future use any time when the females are ready.
Analyzing 10-year time trends for Hysterectomy and Oophorectomy: Focus on Endometrial sampling and risk factors for Endometrial Cancer
Authors: Yurtkal Aslihan , Canday Mujde
Published: July 2024

Background Hysterectomy is a versatile and commonly employed treatment option for various benign and malignant gynecological conditions. Our study aims to take a comprehensive perspective on hysterectomy over the years using accumulated data and provide clinicians with an accurate insight into the hysterectomy operation.Material-Method This retrospective observational study was conducted on women who underwent hysterectomy at our clinic between 2012 and 2021. Comprehensive medical histories of all patients were thoroughly reviewed as the primary data. Surgical procedures were categorized and compared by year. Operation indications, preoperative endometrial sampling, and the pathology results of the final hysterectomy specimens were also examined. Risk factors were evaluated in confirmed cases of endometrial cancer and atypic endometrial hyperplasia based on pathology results. The analyses were performed using IBM SPSS 20 statistical analysis software. Results In our study,752 patients(mean age: 52±8.2) underwent various hysterectomy procedures, with total abdominal hysterectomy being the most frequent(73.3%). The primary indication was uterine leiomyomas-adenomyomas(33.5%). Endometrial sampling was performed in 57.2% of patients, showing no significant difference in reliability(p=0.143) and endometrial cancer diagnosis(p=0.334). Among 38 patients diagnosed with endometrial cancer, approximately 28.9%(11 patients) did not undergo preoperative endometrial sampling. Further examination revealed that these patients were obese, 63.6% presented with spotting-like bleeding, and most were in the postmenopausal period. Risk factors for these patients and those with atypical hyperplasia indicated statistically significant positive family history(p=0.037) and estrogen therapy history(p=0.028). Out of 536 oophorectomies, 236 were performed in women under 50.ConclusionThe study highlights the need to implement the current literature and promote minimally invasive approaches. Widespread adoption of non-hysterectomy options is essential for rate reduction. Physicians must integrate current literature, refine skills in minimally invasive methods, and advance surgical techniques to achieve an idealized approach for premalignant lesions and endometrial cancer. Presenting clinic data to personalize algorithms and treatments will strengthen the literature, enhancing the field and increasing the applicability of knowledge for personalized implementation of ideal algorithms and treatments.
Temporal Characterization of Land Use Change and Land-scape Processes in Informal Settlements in the City of Cape Town, South Africa
Authors: Okoye Perpetua I , Lalk Jörg
Published: July 2024

This study conducted a Land Use Change (LUC) analysis on informal settlements in Cape Town, South Africa, using bi-temporal steps, S1 (2010) and S2 (2016), to characterize land use (LU) conversions and landscape processes for informed policymaking. Utilizing the 2011 national land cover dataset and post-classification methods, two LU datasets and maps, D1 for S1 and D2 for S2, were derived. These classifications achieved an overall accuracy exceeding 95%, with Kappa coefficients above 0.9. The analysis employed change trajectories and conversion labels to evaluate LU changes and landscape dynamics, providing a thematic representation of LUC within informal settlements. Landscape reclamation processes, including abandonment, urban development, and RDP (Reconstruction and Development Programme) development, constituted approximately five percent of the total LU conversions, while degradation processes like persistence and intensification dominated, affecting approximately 93% of the area. Partial reclamation, notably through interspersed RDP (RDPi), accounted for about two percent of conversions. These findings highlight the importance of accurate and timely LUC data reporting in informal settlements to address socioeconomic challenges effectively and support policy decisions to enhance these communities' physical and socioeconomic infrastructure.
Classification of 3D Sonar Point Clouds derived Underwater using Machine and Deep Learning (CANUPO and RandLA-Net) Approaches
Authors: Ntuli Simiso , Akombelwa Mulemwa , Forbes Angus , Singh Mayshree
Published: July 2024

The techniques of point cloud classification in aquatic environments have various applications such as landslide hazard mapping, recovery of lost objects, underwater infrastructure inspection, exploration of mineral resources on the seabed, underwater cultural heritage documentation, environmental preservation and conservation purposes. This study combines acoustic (Sonar) and laser-based (Lidar) remote sensing technologies in an aquatic environment with two machine and deep learning approaches to illustrate the techniques to identify submerged objects. Firstly, the relative accuracy of the underwater imaging system, the BlueView BV5000 Mechanical Scanning Sonar, is evaluated at close range. Secondly, the supervised CANUPO and RandLA-Net classification approaches are used to classify submerged sonar point clouds. Common objects of interest, namely tyres and chairs, were selected for classification. Relative accuracy measurement results showed a centimetre-level root mean square error (RMSE) value, with good accuracies recorded when the scanner is positioned close to objects. The best results were achieved when the target objects were placed at a minimum distance of 2 m from the acoustic scanner. Subsequently, the results of point cloud classification were satisfactory for both approaches. An overall accuracy of 79.81% and an   F1 score of 79.80% were achieved using the CANUPO classification approach. On the other hand, an 80.72% overall accuracy and an 80.63% F1 score were obtained using a RandLA-Net approach. These analyses provide a reasonable framework for the parameters that can be used when applying these techniques in natural aquatic environments.
Isolation, culture trials, and biochemical composition of microalga Tetraselmis from coastal waters of Tanzania
Authors: Michael Angelina , Salum Yussuf Yussuf
Published: July 2024

Microalgae are primary producers in aquatic ecosystems. Their high nutritional value make them suitable for applications in aquaculture and biotechnology. Serial dilution techniques were used to isolate the green microalga Tetraselmis sp. from water samples collected from the Ruvu Estuary in Tanzania. Laboratory culture trials were undertaken at varying salinity and light intensity levels, followed by biochemical analysis. Intermediate salinities (15 and 35) favoured cell accumulation, and light intensity significantly influenced Tetraselmis biochemical composition. Low light intensity (2.9 ± 1.6 Klux) and early harvests (day 7) increased the protein, lipid, carbohydrate and fibre content, whereas high light intensity (5.5 ± 3.3 Klux) led to greater ash accumulation. The day 16 harvest contained higher levels of minerals, with calcium, potassium, and magnesium being prominent. Trace minerals, including selenium, were present in safe quantities. The potential of Tetraselmis sp. from coastal Tanzania for aquaculture and biotechnological applications is highlighted.
Enzymatic and antimicrobial potential of Actinomycetota species from mangrove sediments in Tanzania
Authors: Lyimo Thomas , Fikirini Aisha , Nyandoro Stephe
Published: July 2024

The enzymatic and antimicrobial potential of Actinomycetota species present in mangrove sediments at Bagamoyo in Tanzania was explored. Ten strains were isolated from sediments and identified based on morphological and biochemical characteristics. All isolates were Gram positive and catalase positive. Eight isolates tested positive for amylase production. Crude extracts from five isolates showed antimicrobial activities in at least one of the five tested microorganisms, with MIC values ranging from 10 to 2.5 mg/mL. The 16S rRNA gene region of the five isolates was sequenced, and DNA barcoding revealed that the isolates belong to the genera Streptomyces (3 strains), Micrococcus (1 strain) and Hoyosella (1 strain). The Hoyosella isolate is reported here for the first time from Western Indian Ocean mangrove systems. The identified Actinomycetota have demonstrated capabilities to ferment sugars, produce enzymes and secondary metabolites with antimicrobial properties, with potential application in pharmaceutical, agricultural and biotechnological industries.
The landscape of digital inbound marketing tools adoption by Algerian firms
Authors: Meslem Hanane
Published: July 2024

Inbound marketing is a strategy focused on attracting customers through relevant and helpful content, adding value at every stage of their buying journey. This study investigates the implementation of inbound marketing by Algerian companies. Through a quantitative analysis of 117 companies across 12 sectors, it is observed that the predominant emphasis lies on attracting visitors, marking the initial phase of the inbound approach. However, this singular focus often results in deficiencies in subsequent phases, such as conversion, finalization, and loyalty, indicating an imbalance in the marketing strategy. Thus, we advocate for a comprehensive inbound marketing approach that evenly distributes efforts across the entire customer journey, fostering long-term business growth. It entails investing in tailored tools and strategies for each stage of the buying process, coupled with continuous monitoring to optimize achieved results.
Terra arrasada: desmonte ambiental e violação de direitos no Brasil
Authors:   Felisa Cançado Anaya,   Deborah Bronz,   Sônia Magalhães
Published: July 2024

Terra arrasada: desmonte ambiental e violação de direitos no Brasil registra os efeitos de um processo sucessivo de crises e devastação das políticas e dos direitos socioambientais no país. O livro reúne pesquisas etnográficas e relatos de resistências protagonizados por povos e comunidades tradicionais. As temáticas e situações aqui apresentadas foram abordadas nas atividades promovidas pelo Comitê Povos Tradicionais, Meio Ambiente e Grandes Projetos da Associação Brasileira de Antropologia, no período compreendido entre 2022 e 2024. Este volume é um chamado urgente à ação e à reflexão sobre alternativas de futuro em tempos extremos.
An NFT Marketplace for Graphic Artists in Bicol Region
Authors: Ruben Leaño Balon  , Ibrahim Fabaan Hanbal
Published: July 2024

Non-fungible tokens (NFTs) are gaining popularity in the market, but graphic artists in the Bicol Region face challenges in marketability, resource allocation, and determining the best features of existing NFT marketplaces. The study aims to examine these issues and create an original NFT web platform in the Bicol Region that incorporates blockchain technology, a cryptocurrency, and a decentralized wallet. Users can earn up to US$91.8 million in a single NFT artwork when NFT products are sold. The system uses software development methodology and a design thinking process to help the researcher develop a system that benefits the graphic artists in Bicol. Users can mint, list, bid, sell, and purchase NFTs, and transactions are recorded in a blockchain with unique transaction identities. After the development of the system, vital information will be provided, such as more substantial information for readers interested in the NFT blockchain and may improve their knowledge about it.
A Self-Repairing Natural Rubber as a Novel Material Pad to Develop an Electro-Surgical Training Prototype
Authors: Suchada Saengwiman  , Sittidet Chooduang  , Taksapattanakul Korn
Published: July 2024

This work aims to develop a self-repairing natural rubber sheet and use it in a new design electro-surgical training prototype. The self-repairing material is prepared via controlled crosslinking with varying curing time and temperature and applied as a material pad. The electrical circuit board in the prototype is created to measure the depth of the surgical blade through a material pad. The completely modified control crosslinking of the rubber sheet is confirmed by the changing chemical structure of rubber latex via FT-IR spectra resulting in the hardening of swelling affected by high crosslinking density. The self-repairing of natural rubber sheets occurred at the cut part and the tensile strength at break increases with the increase in self-repairing time. The prototype testing shows that when the scalpel blade is cut into the rubber sheet at the setting dept, the electrical circuit is activated, making it suitable for medical practice.
Fabrico aditivo de modelos médicos por impressão tridimensional
Authors: Cruz Fernando
Published: July 2024

As Tecnologias de Fabrico Aditivo (TFA) têm, em relação as tecnologias convencionais, vantagens adicionais para serem usadas no fabrico de dispositivos médicos, quer pelo facto de poderem gerar formas geométricas de elevada complexidade, quer ainda por poderem gerar essas formas directamente a partir de informação médica individualizada, o que permite a obtenção desses modelos médicos em condições economicamente vantajosas. Neste artigo são apresentados os resultados de um trabalho de investigação abrangendo vários casos de estudo de modelos médicos obtidos pela tecnologia de Impressão Tridimensional (3DP), uma das tecnologias aditivas emergentes e com maior expansão comercial na actualidade. Estes modelos foram produzidos a partir de dados anatómicos personalizados obtidos de pacientes através de Tomografia Computorizada (TAC) e Ressonância Magnética (RM), tendo sido feita uma análise técnico-económica dos modelos produzidos. As possíveis aplicações destes modelos pelos profissionais de medicina incluem modelos para visualização, para diagnóstico, para pré-cirurgia, para projecto e fabrico de implantes externos e intemos, para fins educacionais e didácticos, para efeitos de comunicação, ou para o fabrico de instrumentação médica.
Cores e Sons
Authors: Da Silva Santana Helena Maria , Da Silva Santana Maria do Rosário
Published: July 2024

Neste texto pretendemos mostrar de que forma os universos artísticos do compositor português Cândido Lima e da pintora Maria Helena Vieira da Silva concorrem para a realização de um universo imagético (um universo que se exprime através de imagens tanto sonoras como visuais) e, de um objecto artístico único (atendendo à maneira como se concretiza e projecta no espaço da Casa de Serralves). A construção de um espectáculo de cor e som, através do veicular da obra musical Poligonos em som e azul e de um conjunto de quadros de Maria Helena Vieira da Silva, é única à data do concerto sendo, no nosso entender, relevante o seu estudo. É nossa intenção mostrar igualmente de que forma as obras de Maria Helena Vieira da Silva, através dos seus conteúdos estético imagéticos, influem a escrita e o discurso musical do compositor, bem como de que forma o espaço da Casa de Serralves se transmuta na, e pela escrita, dos dois autores.
O sector cooperativo da vinha e do vinho na união europeia: referência especial a Espanha
Authors: Navarro Amparo Melián , Millan Vázquez de la Torre Genoveva , Ferreira Armando Mateus
Published: July 2024

O cooperativismo é habitualmente referido como uma solução adequada para a gestão e a comercialização de produtos agro-alimentares. No presente trabalho efectua-se uma revisão descritiva do cooperativismo vitivinicola na União Europeia (UE), no que se refere às principais cooperativas, e faz-se uma análise do sector cooperativo do vinho em Espanha. A União Europeia (UE) ocupa um lugar destacado no mercado vinícola mundial. As adegas cooperativas destacam-se essencialmente pela sua base social, não pelo volume de facturação, muito embora representem uma importante quota de mercado do sector, da ordem de 70% em Espanha e 50% em Portugal e na França. Uma característica evidente é que agrupam um elevado número de sócios, factor importante para o crescimento interno e para a afirmação da cooperativa. Em Espanha, terceiro país produtor mundial de vinho, são 57 as Denominações de Origem segundo o Regulamento (CE) 510/2006, e aproximadamente um terço da sua produção está catalogada como vinho de qualidade, segundo o mesmo Regulamento. Embora existam adegas cooperativas em praticamente todas as regiões, a maior parte localizam-se nas Comunidades Autónomas Castela-La Mancha, Catalunha e Comunidade Valenciana.
Eléctrodo de terra em serpentina
Authors: Rodrigues Bruno , Martins António M. R.
Published: July 2024

Este artigo tem como principal objectivo a divulgação de uma aplicação informática para calcular a resistência de difusão de eléctrodos de terra em serpentina, a qual é representada analiticamente por uma sinusóide. No cálculo da resistência utilizou-se o chamado método da matriz, desenvolvido por S. Meliopoulos. Como a distribuição de potencial no solo obedece à equação de Laplace, o eléctrodo de terra é previamente discretizado em pontos-fonte de corrente eléctrica, situados no eixo dos condutores. O modelo discreto é representável por um sistema de equações lineares que-permite calcular as correntes dos pontos-fonte, arbitrando uma tensão no eléctrodo. A corrente deste é a soma das correntes pontuais, e a lei de Ohm permite calcular facilmente a resistência de terra. Os resultados permitem observar que a resistência da serpentina diminui com o aumento do número de máximos, com o aumento da profundidade de enterramento e com o aumento da largura da vala. Conclui-se da utilidade da serpentina, comparada com o simples cabo horizontal, já que possui resistência de terra menor.
Upaya Peningkatan Kemampuan Literasi Informasi Model Seven Pillars Sconul terhadap Pemustaka Melalui Pelayanan Bimbingan Literasi Informasi Pemustaka
Authors: Fistianti Isna , Pudjowati Juliani , Masadah Masadah , Retnowati Nova
Published: July 2024

Penelitian ini bertujuan untuk mengetahui bagaimana kemampuan literasi informasi pemustaka, bagaimana analisa gap harapan dan kenyataan kemampuan literasi informasi Perpustakaan UIN Sunan Ampel Surabaya, bagaimana upaya perbaikan kemampuan literasi informasi model Seven Pillars SCONUL berdasarkan analisa gap atau analisa kesenjangan yang kemudian digambarkan dalam diagram Spider Plot. Selanjutnya akan rekomendasi perbaikan terhadap layanan pelatihan literasi informasi berdasarkan harapan pemustaka melalui diagram Spider Plot. Metode penelitian yang digunakan adalah kualitatif, teknik yang digunakan adalah menganalisis data dari 7(tujuh) variabel Seven Pillars SCONUL, yaitu Indentify, Scope, Plan, Gather, Evaluate, Manage, dan Present. Instrument yang digunkaan adalah kuesioner yang telah disebarkan kepada 52 responden. Hasil dari penyebaran kuesioner tersebut akan ditabulasi, kemudian dicari gap dan letak masing-masing variabel di dalam diagram kartesisus, setelah dilakukan analisis maka akan dicari strategi yang digunakan untuk memperbaiki kemampuan litrasi informasi dengan cara memberikan layanan bimpingan literasi informasi kepada pemustaka.
Pengaruh Motivasi, Pelatihan dan Kompensasi terhadap Kepuasan Kerja dan Kinerja Karyawan pada PT. Graha Prima Indonesia di Sidoarjo
Authors: Bani Mochammad Nashir Khakim Asya’ , Widyaningrum Mahmudah Enny , Rosyafah Siti , Haryono Haryono
Published: July 2024

Penelitian ini bertujuan untuk: (1) membuktikan dan menganalisis pengaruh motivasi, pelaatihan dan kompensasi terhadap kepuasan kerja; (2) membuktikan dan menganalisis pengaruh motivasi, pelaatihan dan kompensasi terhadap kinerja karyawan; dan (3) membuktikan dan menganalisis pengaruh kepuasan kerja terhadap kinerja karyawan PT. Graha Prima Indonesia Sidoarjo. Sampel dalam penelitian ini diambil sebanyak 71 sampel yaitu 71 karyawan pada PT. Graha Prima Indonesia Sidoarjo. Teknik analisis data menggunakan analisis jalur (path analysis) dengan software SPSS (Statistical Package for Social Science) versi 22. Kesimpulan dari penelitian ini, yaitu sebagai berikut: (1) motivasi berpengaruh signifikan terhadap kepuasan kerja; (2) pelatihan berpengaruh signifikan terhadap kepuasan kerja; (3) kompensasi berpengaruh signifikan terhadap kepuasan kerja; (4) motivasi berpengaruh signifikan terhadap kinerja karyawan; (5) pelatihan berpengaruh signifikan terhadap kinerja karyawan; (6) kompensasi berpengaruh signifikan terhadap kinerja karyawan pada PT. Graha Prima Indonesia Sidoarjo.
Kajian Media Sosial dan Kualitas Produk pada Minat Beli Konsumen Kaos Stelabs Startup Business
Authors: Marlita Estiva , Rahmawati Veronika , M Santho Vlennery
Published: July 2024

Stelabs startup business produces themed t-shirts that are marketed in Surabaya. Stelabs is a new product or business that is also required to create new innovations and promotions that are different from the existing t-shirt business. In addition to promoting products, product quality factors also have an important role in the process of attracting consumer buying interest, especially as a consideration for a consumer in buying a product. This study aims to determine the effect of social media promotion and product quality on consumer buying interest at Stelabs. The study used a quantitative research design with a survey approach. Respondents in this study were 179 respondents. The results of this study indicate that social media promotion has a positive and significant effect on consumer buying interest in Stelabs, so it can be concluded that the better social media provided by Stelabs, the better the influence on consumer buying interest. Product quality has a positive and significant effect on consumer buying interest in Stelabs, so it can be concluded that by improving product quality, consumer buying interest in Stelabs will also increase.
Microstructural and mechanical properties of chromium carbide thin layers elaborated by conversion treatment process with two methods on 16Mn2 steel
Authors: Boubaaya Rabah , Djendel Mokhtar , Benaniba Samir , Allaoui Omar , Zidelmel Sami
Published: July 2024

The present study has been conducted in order to obtaining chromium carbide layers on 16Mn2 steel using a conversion processing comprising the following steps: carburizing in solid medium in order to increase the amount of carbon atoms in the steel surface, deposition of a thin layer of pure chromium using electrolytic method, and finally an annealing treatment for carbon diffusion and formation of chromium carbide layer until complete transformation of chromium layer. Depending on the method used (chromium deposition followed by carburizing or carburizing followed by chromium deposition) and the holding time, the partial or complete conversion is obtained as a result of the diffusion process. The role of the annealing temperature on transformation rates of chromium into chromium carbide films was investigated. It is shown that for 1 h at 900°C, the chromium layer is totally transformed. The scanning electron microscopy analysis and X-ray diffraction showed the presence of Cr3C2, Cr7C3 and Cr23C6 chromium carbides in addition of (Cr, Fe)7 C3, Fe2O3 and Cr2O3.
The Ohrid Framework Agreement in North Macedonia between its institutional implementation and political instrumentalization
Authors: Çeliku Xhyla , Preston Anthony
Published: July 2024

This article focuses on the peace agreement reached through international mediation in North Macedonia, known as the Ohrid Framework Agreement. In 2001, this agreement successfully brought together the conflicting parties: the government of the Republic of Macedonia (now North Macedonia), and the armed Albanian forces under the emblem of the National Liberation Army (UÇK). This agreement prevented the escalation of conflict on the scale of the Bosnian and Kosovo War, contributing to the easing of interethnic relations in North Macedonia. It aimed to advance the rights of non-Macedonian ethnic groups, particularly the rights of Albanians, who constitute numerically the second largest ethnic group in North Macedonia at around 30%, according to the latest population registration in 2022. This agreement was intended to be implemented within five years after its signing in 2001. However, even after 22 years, it remains unrealized concerning the fair representation of non-Macedonian ethnic groups within the state structure. Furthermore, it continues to be used as a discriminatory tool by the North Macedonian state. Worse yet, it has become a political instrument for achieving votes through employment, primarily favoring individuals closely associated with the ruling parties, party militants, and relatives of party leaders. This has resulted in the creation of a caste of state political administrators. On the other hand, it has led to unprecedented segregation among Albanians in North Macedonia, with the slogan: ‘This one belongs to us, that one not.’ Consequently, those who are not considered ‘ours’ are compelled to emigrate abroad in search of better living conditions. Over time, this has resulted in a significant exodus, primarily among young people, with official statistics estimating up to 700,000 individuals.
Investigating a peer-learning model that encourages student communication and interaction in an online learning environment: a qualitative approach
Authors: Sarran Dave , Panday Ravin , Abrigo Kieron
Published: July 2024

Modern Learning Management Systems (LMSs) have their roots in the Programmed Logic for Automatic Teaching Operations (PLATO) learning system created in the 1960s. Since then, they have evolved to encapsulate a plethora of new features. Despite this, research shows that many students use only the basic features of LMSs while neglecting their capabilities for communication. Literature indicates that primary reasons for this include teaching authorities dictating the usage of a given LMS, student fears of stating an unpopular opinion, and students not finding LMS communication systems satisfying to use. This research aimed to develop a peer communication system (Quizzle) based on a conceptual peer-learning model. The system was intended to make the students the primary authority of the system and was designed such that it would be interactive and fun to use. To evaluate the system, Year 3 and 4 students of the University of Guyana were invited to interact with the system over two weeks. Interviews with the students were then conducted to determine their perspective of the system. Thematic analysis was performed on the data collected. The data revealed that the participants responded positively to the implemented system. Many found that it facilitated peer interaction, was an anxiety-free experience, helped to build social skills, and helped to promote independent learning.
A variational approach to a constrained hyperbolic Kirchhoff type problem with free boundary
Authors: Bentata Fatima Ezahra , Mokhtari Abdelhak , Boumaza Nouri
Published: July 2024

In this study, we explore the existence of weak solutions for a hyperbolic Kirchhoff-type problem constrained by volume with a free boundary. Our approach leverages the hyperbolic discrete Morse flow. The presence of both a non-local term and a free boundary in our problem introduces significant challenges, necessitating unconventional methods for resolution. These unique difficulties are at the heart of our investigation. Specifically, the non-local term complicates the application of traditional analytical techniques, while the free boundary condition requires careful handling to ensure the existence of solutions. Our methodology involves a detailed examination of the hyperbolic discrete Morse flow framework, adapting it to address the intricacies introduced by the non-local term and the free boundary. Through rigorous mathematical analysis and the development of novel techniques, we aim to establish the conditions under which weak solutions exist.
Managing Work Requests to Improve Level of Building Maintenance Services
Authors: Sudarwanto Onny ,   School of Business and Management, Institut Teknologi Bandung, Yudoko Gatot ,   School of Business and Management, Institut Teknologi Bandung
Published: July 2024

Building and Facilities Maintenance Section is one of the sections in Infrastructure Facilities Department in PT.ABC that deals with the maintenance and operation of building facilities in non-PIT areas. PT. Sumber Karya Utama is the contractor appointed to carry out the building maintenance contracts. In contrast to the KPI of 90% for Work Request completion, the total incoming WR addressed to the section has a completion rate of 65% every month. Delays in completing Work Request work are due to the fact that there has not been a structured work schedule made, the planner have difficulty making Work Order work plans is because the WR descriptions are random and the work locations are spread out. The Building Maintenance Section developed a Standard Operation Procedure (SOP) for writing Work Request to standardize writing descriptions to the main job, so the planner could assess, identify and making categorized of the type of work item into work group items easily. To establish a work schedule, prioritize work group items using the SMART method. The data used are list of work items, work groups, alternatives, criteria, and weighting. The sequence of work schedules runs effectively by implementing a division into 5 work areas so that work schedules are made per work area. By implementing work priority references and dividing the area into 5 work areas, WO work can be completed on time, more fairly distributed, efficiently completed, and acceptable to all parties involved, thereby improving the performance and quality of services provided to customers, as well as ensuring that building maintenance runs smoothly and continues to function properly.
Apartment Rental Management System for Real-Time Transaction and Task Organization
Authors: Magno Janine M. ,   MIT Graduate School Department, State University of Northern Negros, Philippines, S. Pelayo Ronnie , Soberano, Ph.D. Kristine T. ,   MIT Graduate School Department, State University of Northern Negros, Philippines,   State University of Northern Negros, Philippines
Published: July 2024

The study focuses mainly on providing Celso with an Apartment Rental Management System for Real-Time Transaction and Task Organization. The system is a solution to the issue of inaccurate and disorganized data management within Celso’s apartment complexes. To address this challenge, the Apartment Rental Management System for Real-Time Transaction and Task Organization is designed to cater specifically to the needs of lessors, offering a comprehensive system. By implementing the Apartment Rental Management System for Real-Time Transaction and Task Organization, this study seeks to alleviate conflicts between lessors and how to manage the properties while concurrently enhancing the efficiency of property management operations. The researchers will use the developmental method of research and the Rapid Application Development Approach Model as the Software Development Life Cycle (SDLC). The implementation of the system was successful and generated a positive outcome. Therefore, the lessors, and property managers of the Celso Apartment, consider and accept the implementation of the developed system as a promising solution to the multifaceted challenges encountered in apartment rental management.
The Effect of Plyometric and Ladder Drill Training on the Agility of Female Cricket Athletes in Terms of Leg Power
Authors: Nono Koba Kristoforus ,   Departement of Sports Science, Faculty of Sport and Health Science, Yogyakarta State University, Yogyakarta, Indonesia
Published: July 2024

Cricket is a sport played by hitting the ball with a bat and running to exchange positions to get points, which is played on an oval-shaped field. Cricket requires good physical conditions such as speed. Plyometric and ladder drill training methods are training methods that can increase speed. This study aimed to examine the effect of plyometric and ladder drill training on the speed of cricket athletes in terms of leg power. This research uses a 2x2 factorial experimental method. The population of this study was 45 cricket athletes from the province of East Nusa Tenggara (NTT). The research sample consisted of 24 cricket athletes who were taken using a purposive sampling technique and then carried out ordinal pairing to divide the groups. The data collection technique uses pretest and posttest, the test instrument used to measure speed is a 30 m sprint and the agility instrument is the T-Test. The data analysis technique uses two-way ANOVA with a significance level of 0.05. The research results show that (1) there is a significant difference in influence between plyometric training and ladder drill training on the speed of female cricket athletes. The plyometric training group experienced an increase in speed of 4.67, better than ladder drill training, namely 4.86, with a posttest average difference of 0.19. (2) there is a significant difference in influence between cricket athletes who have high and low leg power on speed. Cricket athletes who have high leg power experience an increase in speed of 4.64, which is better than cricket athletes who have low leg power, namely 4.89 with a posttest average difference of 4.25. (3) There is no interaction between plyometric and ladder drill training and leg power on speed
An Effectiveness of Horizontal Subsurface Flow Constructed Wetland to Improve Fish Pond Water Quality
Authors: Erdian Pratiwi Anisa ,   Department of Environmental Engineering, Faculty of Civil, Planning, and Geo-Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia, Titah Harmin Sulistiyaning , Trihadiningrum Yulinah , Hamidah Laily Noer , Islamay Hanan Shella ,   Department of Environmental Engineering, Faculty of Civil, Planning, and Geo-Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia,   Department of Environmental Engineering, Faculty of Civil, Planning, and Geo-Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia,   Department of Environmental Engineering, Faculty of Engineering, Universitas Nahdlatul Ulama, Sidoarjo, 61234, Indonesia,   Department of Environmental Engineering, Faculty of Civil, Planning, and Geo-Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia
Published: July 2024

Fish is one of the sources of protein. Fish is one of the largest commodities from aquaculture. Fish farming is one of the economic supports for the community, especially around the waters in Indonesia. Aquaculture in Indonesia uses river water and tidal seawater as the main water source. Changes in water quality due to pollutants in the water can affect the quality of pond water. Horizontal Subsurface Flow Constructed Wetland (HSSF-CW) technology can increase the efficiency of organic matter removal. The aim of this study were to identify the water quality of fish pond and performance of HSSF-CW technology in improving fish pond water quality. The media in reactors were gravel and sand with plants (Bruguiera gymnorrhiza and Avicennia alba). Dimension of reactor were 65x60x40 cm3 and it were made from polymethyl methacrylate. There were 10 reactors, namely K1 (without plants and without flow rate), K2 (without flow rate), A1Bg (raw water+4 mL.min-1+B. gymnorrhiza), A2Bg (raw water+8 mL.min-1+B. gymnorrhiza), A1Aa (raw water+4 mL.min-1+A. alba), A2Aa (raw water+8 mL.min-1+A. alba), B1Bg (effluent+4 mL.min-1+B. gymnorrhiza), B2Bg (effluent+8 mL.min-1+B. gymnorrhiza), B1Aa (effluent+4 mL.min-1+A. alba), and B2Aa (effluent+8 mL.min-1+B. gymnorrhiza). The reactor were operated continuously with flow rate (4 mL.min-1 and 8 mL.min-1). Analysis of Total Suspended Solid (TSS) used gravimetry method and salinity used argentometri titration. The spectrophotometers analysis were conducted to determine of COD, PO43-, NH4+, and NO3-. In conclusion, the largest removal efficiency of raw fish pond water on COD, TSS, PO43-, NH4+, and NO3- parameters were obtained in reactor A1Aa (83.86%), A1Bg (89.53%), A2Bg (24.06%), A1Aa (84.83%), and A2Aa (93.77%). The greatest removal efficiency of effluent pond on COD, TSS, PO43-, NH4+, and NO3- parameters were obtained in reactor B1Bg (85.46%), B1Bg (91.21%), B2Bg (92.29%), B2Aa (86.81%), and B2Bg (96.84%).
Assessing the Effect of Technological Integration on Procurement Efficiency of Zamtel, Lusaka, Zambia.
Authors: Musheba Lungowe Lillian ,   ZCAS University, School of Business, SID H13140, Hapompwe Chrine, C. ,   ZCAS University, School of Business, SID H13140
Published: July 2024

This study purposed to assess the effect of technological integration on procurement efficiency at Zamtel, Lusaka. The specific objectives were: (1) to analyze the current state of technological integration in Zamtel's procurement processes and its effect on business performance, (2) to assess the impact of technology on the efficiency and effectiveness of Zamtel's procurement activities, and (3) to examine the challenges and opportunities associated with the use of technology in Zamtel’s procurement processes. Adopting a pragmatic research philosophy, the study employed a mixed-method approach, combining qualitative and quantitative paradigms. The target population comprised 379 Zamtel employees, with a sample size of 195, determined using Slovin's formula. Data collection tools included interviews and 195 questionnaires distributed with a 100% return rate. To ensure validity and reliability, triangulation was employed alongside rigorous data processing and analysis using descriptive statistics and thematic analysis. 39.6% of respondents agreed that technology is seamlessly integrated into procurement processes, while 37.9% disagreed, indicating mixed perceptions. Procurement Efficiency and Effectiveness: 59% of respondents agreed that technology integration improved overall business performance, and 48.7% believed in improved efficiency, though 29.7% perceived no increase in efficiency. Significant challenges included resistance to change and high implementation costs, while opportunities for improvement and transformation were recognized by 51.8% of respondents. The study concluded that technology integration holds significant potential for enhancing procurement efficiency and effectiveness at Zamtel. However, challenges such as resistance to change and integration issues must be addressed to fully realize these benefits. Continuous evaluation and alignment with business goals are crucial for maximizing technology's impact. Recommendations for Zamtel include developing a comprehensive technology adoption strategy to address challenges and leverage efficiency gains, enhancing training programs to improve technological tool utilization, fostering a supportive organizational culture that promotes innovation, and continuously evaluating and adapting technological integration efforts to align with business needs.