bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation of the antibacterial and anticogulant activities of Linum usitatissimum L.extracts
Authors: Boukeria S. , Mnasri S. R. , Kadi K. , Benbott A. , Bougueria H. , Biri K. , Lazbbache W.
Published: May 2023

The objective of this study is to evaluate the phytochemical constituents and anticoagulant, and antibacterial activities of phenolic extracts obtained from flaxseed. The quantitative estimation of total phenols by the colorimetric method showed that both aqueous and methanolic extracts are low in these compounds. The evaluation of the antibacterial activity of polyphenols was carried out by the disc method by determining the minimum inhibitory concentration (MIC). The results showed that no antibacterial activity with polyphenols was observed; against the five bacteria tested.The anticoagulant activity of polyphenols was also evaluated in vitro using the cephaline-kaolin (TCK) and Quick time (TQ) tests. The coagulation times obtained on normal plasma indicate that they have moderate activity on both coagulation pathways.
Involvement of abiotic stress tolerance mechanisms in biotic stress tolerance in durum wheat
Authors: Hamli S. , Kadi K. , Bekhouche I. , Harnane I. , Addad D. , Abdelmalek A. , Harrat N.
Published: May 2023

The objective of our study is to implicate the mechanisms of tolerance to abiotic stress by the synthesis of metabolites in tolerance to biotic stress. The extracted metabolites; proline, sugars and polyphenols from durum wheat seedlings subjected to heat shock (40 °C), used to test antifungal activity on two fungal strains, powdery mildew and penicillium, under controlled conditions. The boussellam variety is more tolerant of applied stress than the Ciccio and Vitron varieties. The concentration of the three osmolytes varies from one variety to another; it increases in genotypes stressed compared to controls. Antifungal activity results in the appearance of an inhibition zone around the disc impregnated with the studied extract. Sugars have proven to be a highly effective antifungal agent compared to proline and polyphenols with maximum values (28,33 ± 2 mm) in oidium and (29 ± 1 mm) in penicillium.
A new symmetric differential operator of normalized functions with applications in image processing
Authors: Ibrahim Rabha W.
Published: May 2023

Recently, a symmetric differential operator (SDO) is attracted to studying in the field of mathematical analysis. A new formal of SDO is presented to generalize some well known differential operators in a complex domain. According to this formulation, we shall exam the boundedness and compactness of this operator in complex spaces, such as Hilbert space and Sobolev space. For this purpose, we suggest new norms to solve the fractional Beltrami equation in the open unit disk. This operator has ability to depict the analytic geometric representation of the solution of second order differential equation utilizing the concept of Schwarzian derivative in the open unit disk. Applications in imagings are given the sequel.
Synthesis, Cu(II) Schiff base complexation and structural annalysis of the ligand 4-{[2-(methoxycarbonyl) pyrrolidin-1-yl] methyl} benzoic acid
Authors: Far H. , Benaissa T , Daoudi S , Ammam A E.
Published: May 2023

A new proline based ligand was syn thesized by a convenient procedure. The ligand was characterized by 1 H NMR, 13 C NMR and IR spectroscopies. Copper (II) Schiff base complexes of 4 --{[2 --(methoxycarbonyl) pyrrolidin 1 yl] methyl} benzoic acid of this ligand were synthesized and characterized by the aforementioned spectroscopy techniques, i.e. 1 H NMR, 13 C NMR and IR. Moreover, its bactericidal activity was assessed through the determination of the minimum inhibitory concentration (MIC) values as well as the i nhibition zone diameter for gram po sitive bacteria, such as Staphylococcus aureus , and gram negative bacteria like Klebsiella pneumoniae, Citrobacter freundii, Salmonella typhi, Enterobacter cloacae (the two bacteria Citrobacter freundii and Salmonella typhi are very sensitive against this molecule unlike Enterobacter cloac ae bacteria which is resistant).
Theoretical study of the reactivity of monuron and its protonated forms
Authors: Masmoudi R. , Khettaf S. , Boukhatem I. , Aberkane R. , Kahlat C. , Soltani A. , Dibi A.
Published: May 2023

A theoretical study of 3-(4-Chlorophenyl)-1,1-dimethylurea and its protonated isomers has been carried out, to emphasize the experimental results of the electrostatic interactions in the herbicide models, for investigating the implications taking place on the structural parameters starting from the gaseous phase to the aqueous one. It has been found that its functionalized structure gives us three protonated targets. The calculations has been performed on both neutral and protonated forms using Density Functional Theory (DFT) with the hybrid functional B3LYP. Many molecular parameters have been studied. To identify the reactive sites, our study has focused on the local and the global reactivity descriptors explaining the chemical reactivity. The calculations have demonstrated that the attacks on the aliphatic branched exocyclic positions are privileged to those of the aromatic ring. Studying the solvent effect has revealed that there is a change in the hierarchy of the electrophilicity. Various vibrational modes have been exploited to discuss the literary spectroscopic data.
Preliminary phytochemical screning from different extracts of Solanum nigrum plant growing in south of Algeria
Authors: Guediri I. , Boubekri C. , Smara O.
Published: May 2023

Bioactive substances are responsible for therapeutic properties of the plant in folk medicine. They have actions in the body that may promote good health. They are being studied in the prevention of disease. The present investigation is focused on screening of bioactive substances present in the various parts (leaves, stems, and grains) of Solanum nigrum. Qualitative tests for the presence of phytochemicals in different extracts using solvants with different polarity such as methanol, chloroform, petroleum ether and aqueous extracts. Phytochemical investigation indicated the presence of various groups of compouds including alkaloids, flavonoids, tannins, coumarins, sterols and triterpenoids, saponins. Solanum nigrum L. acts an important role in traditional medicine and represent natural source of biactives compounds.
Estimation of groundwater recharge in the plain of Sidi Bel Abbès, Algeria
Authors: Bellaredj A. E.
Published: May 2023

In Sidi Bel abbes, 30% of drinking water needs are met with groundwater. The remaining 70% are transferred from abutting cities. A situation expected to worsen due to predicted precipitation drop and population growth. Thus, identifying and quantifying the parameters of the water budget in the study area is necessary to implement adequate management and exploitation policies. In this paper, we present the full water balance of the plain of Sidi Bel Abbes for the period 2015-2016, combining the natural components of the water cycle and anthropogenic activities. The results show that the actual evapotranspiration and the runoff equal 311mm and 30mm respectively. Infiltration is equivalent to 17% of rainfall and represents 52Mm3/yr of groundwater recharge. The water deficit between the total inflows and outflows remains considerable (29Mm3/yr), despite the authorities efforts.
The fractal analysis, an alternative to the renewal of urban land in the Bejaia city
Authors: Zenati Bouiche F. Z. , Alkama D. , Bouamrane A.
Published: May 2023

The aims of the present study are to evaluate and characterize the spatio-temporal dynamics of urban spaces in bejaia city north eastern Algeria. In this work, we use the allometric scaling associated with fractal model and geographic information systems to solve the mentioned problem. The analyses of results show that during the period 1947 and 2019, the structure of the study area indicates a notable deep dilution with irregularity in the size and shape (Dsurf1947= 1.75, Dsurf 1985= 1.58 and Dsurf 2019 = 1.71)due to the decrease in the area of agricultural land and forests. The results of fractal model analysis showed that over time the spatial distribution of urban area becomes more complex and clustered. On the other hand, the results demonstrated that the spatial and temporal evolution of the urban area goes from a compact (a1947=1.80) to diluted city (a2019=1.27). Finally, the results of this study can be used as a decision-making tool for analyzing complexity of the spatio-temporal variation of urban areas and assisted decision-makers to take an action on land management.
Evolution of the physical and physico-chemical parameters of compost resulting from a mixture of oasis waste and poultry manure
Authors: Laouar F. , Halilat M.T. , Oustani M. , Benbrahim F. , Aidoud A. , Guessoum H.
Published: May 2023

The purpose of this study is to monitor the evolution of some physical and physico-chemical parameters of four types of compost prepared from the mixture of oasis waste and poultry manure in different proportions. During the trial, which lasted 218 days, the temperature rises during the thermophilic phase for all the treatments, reaching a maximum threshold of 55°C recorded by the treatment (poultry manure (PM) + mixture of residues (wheat straw + olive residues) (MI)). The pH, EC, nitrogen, phosphorus and potassium values increase for all treatments at the end of the test. On the other hand, the MO content and C/N ratio are significantly reduced during the trial, especially for treatments containing poultry manure. The results obtained show that the four prepared composts meet the characteristics of a stable, hygienic product suitable for use in poultry farming.
Identification of the components of the drinking water model: The use of ARMA models
Authors: Loudjani N. , Messameh A. , Bouzaine M.T.
Published: May 2023

In this paper, we consider the modeling of time series corresponding to the methodology of Box and Jenkins for building forecasting modelling from ARMA (Auto Regressive Moving Average)processes. This involves the analysis and forecasting of drinking water production data. The purpose of this study is to modelling a time series of drinking water production data according to its past and present values in order to determine the adequate ARMA process by the principle of parsimony. Using the Eviews for Windows software, the results show that the exploration of monthly drinking water consumption data provided by the Biskra Management Authority (A.D.E) during the period from January2009 to January2016, Revealed characteristics such as the non-stochastic non-stationarity of the drinking water production series.
Effect of earthworm casts from a natural meadow on some soil physico-chemical characteristics and lettuce growth
Authors: Addad D. , Kadi K. , Harrath N. , Boumaàza S. , Chekhab Kh. , Hamli S. , Dib D.
Published: May 2023

Fertile Grounds are the source for agricultural production and effective nutrients management. We aim at surveying the contribution effect of earthworm casts on physical and chemical soil characteristics (pH, organic matter, electrical conductivity, exchangeable cations) and their impact on morphophysiological parameters of lettuce. Basically, for this operation we have choose three levels of intake (100, 250 and 500g of earthworm casts/pot). The obtained results have shown that the earthworm casts are rich in nutrients such as nitrogen, calcium, potassium and organic matter. Correspondingly, the contribution of earthworm casts has increased the soil content of OM, NTK, K+ and CaCO3. Also, it has a positive effect on chlorophyll, aerial, root biomass and on lettuce growth in general. The results also have indicated that the 500g dose of earthworm casts/pot have been increased the various parameters.
Quantifying the effect of green-roof and urban green infrastructure ratio on urban heat island mitigation -semi-arid climate
Authors: Sahnoune S . , Benhassine N . , Bourbia F. , Hadbaoui H.
Published: May 2023

Green Roof (GR) is one of the most applied strategies to Mitigate Urban Heat Island (UHI) recommended for sustainable cities. This research aims to examine and evaluate the effect of the GR/UGI ratio on UHI mitigation, creating Urban Cool Island (UCI). The study was carried out at Constantine, situated in the East part of Algeria, characterized by a semi-arid climate with high summer solar radiation intensity. An urban climate analysis was conducted during the hottest period of the year by means of remote sensing data using ArcGIS 10.2 platform. The results displayed that vegetation, urban density, and topography strongly affect UHI. Furthermore, other finding results in this research show that fixing GR/UGI ratio (with 0.0063 reduced the average air temperature by 1.24°C) in a large-scale urban area, can reduce the surface temperature by 4.00 degrees of the studied area.
Imposters anomaly detection
Authors: Tazerouti A. , Ikram A.
Published: May 2023

Over the last two decades the world of cyber security has grown immensely, but despite the state-of-the-art security detection systems and intrusion detection systems (IDSs), unwanted malicious users still find their way around these security measures and gain access to secure systems. This study consists of shedding some light on the security issues in the intrusion detection systems, their vulnerabilities and drawbacks. A hypothesis is proposed to help mitigate these issues and obtain a fast and a more precise method for the detection of different malicious intruders and imposters, study their behavior and make a statistical comparison of data from the used IDSs and throughout the process. This study will state the current available technologies of IDSs, site their challenges and implement a new software-based methodology to increase the detection and reduce false alarm rates for the IDS.
Non-linear backstepping speed control for Asian electric scooter uses
Authors: Chergui H. , Nasri A. , Korhan K.
Published: May 2023

The electric scooter has become very popular especially in large European and Asian urban areas, thanks to its some advantages. While its popularity is increasing, studies about these electric scooters are also increasing. The main objective of this study is to introduce the design of an autonomy extended electric three-wheeled scooter. For this aim, a model is obtained firstly and it is driven by two BLDC motors placed on the rear wheels independently controlled by a non-linear controller named as Backstepping. Indeed, it contains a powerful electronic differential system to ensure the security of passenger while entering the curved road. The studied model is simulated through the MATLAB Simulink environment where interesting results are shown in results.
Water wells quality assessment using water quality index for the purposes of drinking of M’zab Wadi region
Authors: Benabderrahmane H. , Baba Amer Z.
Published: May 2023

The present work aims to assess the groundwater quality using Water Quality Index (WQI), which can be considered as major factor for controlling quality of water with regarded to drinking purposes. Water quality index is used to illustrate the general state of water quality in a single number. This study concerns specifically Daia area upstream region of M'zab valley. Water samples have been collected at eighteen groundwater points in two years 2016 and 2017. Then, different parameters are analyzed and compared with Algerian standards for drinking water. The hydrochemical study shows significant variations in physico-chemical measurement. Also, the obtained results of the water quality index in Daia region show an excellent ranking with 94%, 88% in years respectively.
Checklist, diversity and distribution of wild bees (Hymenoptera: Apoidea; Anthophila) across Tlemcen mountains, in the north west of Algeria.
Authors: Ouahab Y. , Bendifallah L.
Published: May 2023

Our study concerns the diversity and distribution of wild bees through three sites in the Tlemcen mountains. The present paper contains a checklist of 155 taxa with three new records for the Apoid fauna of Algeria. These are Andrena marginata Fabricius, 1776, Anthidium manicatum Dallatour, 1877 and Megachile latimanus Say, 1823. The index study and the statistical treatments applied to the results made it possible to highlight the composition of this fauna, its dependence on floral resources and its spatio-temporal distribution across the region. The results obtained reveal a high richness of Apoids in this region, the conservation of which is necessary in the future as this fauna plays a key role in the pollination of plants and their diversity within natural and agricultural ecosystems.
Experimental approach to the length of the threshold-controlled hydraulic flow in a rectangular channel with a rough bottom
Authors: Nouacer B. , Kateb S , Abd Elouahed B .
Published: May 2023

The study proposes to examine, by the experimental route, the effect of roughness on the hydraulic jump length in rectangular channel. A comparative study between the characteristics of the jump controlled by a threshold with a smooth and rough bottom is proposed. The results of this research can be applied in the hydraulic load dissipation basins of dams and also in irrigation lines, using the ability of the projection to raise the water level downstream of the flow.
Assessment of the knowledge and perception of prostate cancer and uptake of screening among public transport drivers in selected motor parks in Akure, Ondo State
Authors: Owolabi A.G. , Atandero M.O. , Oluwaseyi O.T. , Afolabi O.O.
Published: May 2023

Objective: Prostate cancer is one of the most common cancers affecting men globally. The objectives of this study were to assess the knowledge of prostate cancer among public transport drivers, the perception of prostate cancer among public transport drivers and to evaluate the uptake of prostate cancer screening among public transport drivers.Method: A cross-sectional study was conducted using a self- structured questionnaire with Yoruba and Igbo version was used to elicit information from the drivers. Two hundred and thirty four participants (234) were recruited for the study and SPSS version 23 was used to analyze the data collected.Results: The participants mean age being ±46 years 5.1 standard deviation and a good number of them were married, Majority of the public transport drivers had poor knowledge of Prostate Cancer and screening and the poor knowledge could be traced to low level of education among the participants. A significant proportion of the participants however, exhibited poor knowledge and negative attitudes and perceptions of prostate cancer screening and treatment. The uptake rate for prostate cancer screening among the participants was 18% which is relatively low. This study was an eye opener as it revealed significant low knowledge, perception of prostate cancer and relatively low prostate cancer screening practice The findings in this study is an indication for a need to increase public sensitization campaigns on prostate cancer and its screening tests to improve public understanding about the disease with the aim of prevention and early detection .Conclusion: The study showed considerable source of participant's information on PCa to be from health workers and social media. .However, there is considerable low screening uptake. Therefore, health education should target people with lower educational level and whose workload is strenuous this in turn will increase the uptake of screening of Prostate Cancer.
Prevalence and risk factors for preterm delivery in UNIOSUN Teaching Hospital, Osogbo - A 5 year retrospective review
Authors: Fasanu A.O. , Atanda O.A. , Taiwo A.O. , Afolabi A.
Published: May 2023

Introduction: Preterm delivery is the leading cause of death in the neonatal period. It causes 28% of perinatal mortality. In Nigeria, it is responsible for 40-60% of perinatal morbidity. According to a U.S. research, preterm births have surged globally. In 2016, 16.8% of singleton live births in Lagos, Nigeria, were preterm.Methods: It was a retrospective review of patients with singleton preterm delivery in UNIOSUN Teaching Hospital, Osogbo from July 2013 to June 2018. Case records of mothers/patients with preterm deliveries were retrieved. Information on the patients' age, parity, educational status, weight, body mass index, number of antenatal visits, identifiable causes of preterm delivery and others were all extracted.Result: During the research period, 2,234 babies were born, including 210 preterm singletons out of which 147 were reviewed. Singleton preterm birth prevalence was 9.4%.Of the 147 mothers, n (20.4) had premature rupture of membrane (PROM), hypertensive disorders in pregnancy occurred in n(17.0%), Urinary Tract Infection (10.8%) and malaria in pregnancy (6.1%).Conclusion: Preterm birth rates were low compared to recent rates in the country. PROM, malaria in pregnancy, UTI in pregnancy, hypertensive disorders in pregnancy and previous history of spontaneous miscarriage were important causes/risk factors for preterm delivery.
Antimicrobial, phytochemical and pharmacological properties of Phyllanthus niruri linn
Authors: Oyekanmi B. A. , Osho I. B. , Kolawole J. C.
Published: May 2023

Introduction: Phyllanthus niruri is a common herb widely used in home remedies against infectious agents. This study unveils the antimicrobial and therapeutic potentials of P. niruri against Escherichia coli infection.Methods: Ethanol and water extracts of the plant were prepared and investigated for their antimicrobial activity using the agar well diffusion method against eleven clinical isolates. The in vivo study was conducted on albino rats, infected and subsequently treated.Results: The observation showed Ciprofloxacin with the highest (41 mm) sensitivity against P. mirabilis; and lowest (20 mm) against S. flexneri, E. coli, K. pneumoniae, and S. aureus. Ketoconazole at 100 mg/mL concentration revealed antifungal sensitivity ranging from 2 to 15 mm. The extracts showed better sensitivity against the bacteria (2 to 24) mm when compared with the fungi species (2 to 12 mm). Phyllanthus niruri extract demonstrated a minimum inhibitory concentration of 25 to 100 mg/mL The albino rats of weight ranging from 83 to 105 g were administered with P. niruri ethanol extract but indicated no toxicity at 1500 mg dose. The packed cell volume, red cell count, total leucocyte count, and serum enzymes of the tested rats were within the normal range. The healing effect was dose-dependence and most effective from 1200 mg/kg to 1500 mg/kg body weight. P. niruri extract produced some level of antimicrobial activity both in vitro and in vivo.Conclusion: Extract from Phyllanthus niruri is effective in vitro and in vivo against Escherichia coli infection. It has no ill effect on the blood circulatory system, liver, and kidney. The bioactive agent present in the extract has proven health benefits, and can be administered as supplement. However, more studies on its chronic toxicity are required.
A Modified Approach of Valuing Unpaid Household Work in the UK Considering Multitasking and Adjusting for Quality and Productivity.
Authors:   , Schroeder Christian
Published: May 2023

While unpaid work activities contribute significantly to a country’s economy, a large amount of those activities is not included in the Gross Domestic Product (GDP), but various approaches can be applied to estimate this contribution, and assign a monetary value to them. However, the currently dominating approach used for the valuation of labour (VoL) does have some known weaknesses that lower the accuracy of calculations. The aim of this research is to modify that approach by taking consideration of simultaneous activities, quality and productivity. This is hoped to increase the accuracy of the valuation. Further, gender differences are considered and the impact of selected demographics on quality is investigated. Based on the findings, recommendations to policy makers and practitioners are given to support the development of a harmonised approach. In line with a review of the literature, a quantitative research design was applied for the modifications. The original contribution to knowledge of this study is the implementation of up to three adjustments to the dominating VoL approach. One adjusts the time to account for multitasking, the other two adjust the specialist wage rates for quality and productivity. This is the first time three adjustments were implemented in a single approach. This study relied on secondary data from the UK Time Use Survey and the Annual Survey of Hours and Earnings, and used an online questionnaire to collect primary data for adjustments, gender effects, and a regression analysis on demographics. The VoL was calculated for various adjustments and the magnitude of the modifications was compared to the dominating approach using a housekeeper and unadjusted specialist wage rates. The regression investigated whether selected demographics affect the quality of unpaid household work. The findings suggest that the commonly applied housekeeper wage rate may not act as a lower boundary for the VoL. The results also showed that wage adjustments on quality and productivity vary by gender and the activity performed. Contrary to previous recommendations, an equal split of multitasking activities (1/n) could not be confirmed, because splits differed up to 9%. Further, estimated adjustments levels were different to the often arbitrary recommendations in literature. This was also the case when all three adjustments were considered together. For the total UK economy, the implementation of adjustments would improve the VoL by up to 5.29% of the UK’s annual GDP, depending on the chosen modification. Unexpected was the finding that women reported a higher productivity level than men. The presence of children, gender, marital status, education and personal level of health were found to be relevant demographics to impact on the quality of unpaid household work. The major implications this study hopes to make are to increase the accuracy of the VoL and support the development of a harmonised approach for the VoL.
Lexikologie der kroatischen Sprache der Gegenwart. Eine Einführung
Authors: Kunzmann-Müller Barbara
Published: May 2023

Die erste umfassende deutschsprachige Einführung in die Lexikologie der modernen kroatischen Standardsprache. Der kroatische Wortschatz, Grundeinheiten und systematische Beziehungen Historische Einbettung und Entwicklung des kroatischen Wortschatzes Konzeption: Das primäre Interesse der Lexikologie gilt der Inhaltsseite des Wortes: Welche Bedeutung bzw. Bedeutungen werden einem Lautkörper zugeordnet und in welchen Relationen stehen sie zueinander? In 12 Kapiteln ist in detaillierten Unterkapiteln die kroatische Sprache der Gegenwart in deutscher Sprache systematisch beschrieben. Grundbegriffe der Lexikologie werden eingeführt. Eine Vielzahl von Beispielen und übersichtlichen Tabellen illustriert Phänomene wie Synonymie, Antonymie, Hyperonymie, Hyponymie, Wortfeld, Wortfamilie bzw. syntagmatische Relationen. Am Beispiel ausgewählter Bereiche werden schließlich Erscheinungen des kroatischen und deutschen Wortschatzes kontrastiv gegenübergestellt. Ein ausführliches Literatur- sowie ein Abkürzungs- und ein Sachwörterverzeichnis runden den Band ab. Berücksichtigt neue linguistische Erkenntnisse
A importância da leitura no processo de aprendizagem – partilhando experências
Authors: Ramos Gleison Costa , Carvalho Aline Rodrigues
Published: May 2023

O presente artigo descreve a importância da leitura no processo de ensino/aprendizagem e na formação de cidadãos. Destaca-se a relação entre uma educação de qualidade e o progresso de uma nação, enfatizando a necessidade de leitores reais, com senso crítico, para alcançar esse progresso. O posicionamento do Brasil em relação à educação é abordado, utilizando como base o PISA e literaturas científicas, e discutindo a influência dos processos de alienação no meio social como um fator explicativo para a estagnação nacional. Além disso, são apresentadas experiências do projeto "Biblioteca Andante", realizado com uma turma do 5° ano do Ensino Fundamental na Escola Euzébio de Queiroz, no município de Alto Alegre dos Parecis, em Rondônia. Reconhecendo o importante papel da leitura como ferramenta de desenvolvimento e formação de cidadãos, o artigo ressalta a necessidade de escolas e educadores atuarem como incentivadores e divulgadores dessa arte, buscando torná-la uma prática habitual no dia a dia dos alunos. No contexto prático, o projeto "Biblioteca Andante" é descrito como um compromisso educativo voltado para a democratização social e cultural, atribuindo à escola a função e a responsabilidade de garantir que todos os alunos tenham acesso aos recursos linguísticos necessários para exercerem a cidadania, um direito inalienável. O objetivo é despertar nos alunos o gosto pela leitura e, simultaneamente, desenvolver o hábito da escrita, refletindo sobre a importância desse ato. Por fim, o artigo conclui que a leitura é a chave para a libertação e o crescimento, tanto individual quanto coletivo. Destaca-se a importância de um maior incentivo às práticas de leitura para uma nação que busca o crescimento.
RANCANG BANGUN MESIN EMPING JAGUNG DENGAN SISTEM ROLLER KAPASITAS 25KG/JAM
Authors: Pakpahan Prengki , Lumban Gaol Darlin G , Hasballah T , Pardede Saut
Published: May 2023

Perkembangan teknologi mesin yang semakin memudahkan manusia untuk mengerjakan sesuatu menjadi lebih mudah dan lebih cepat. contohnya dalam pengolahan hasil pertanian, kita mungkin udah sering melihat mesin-mesin yang digunakan masyarakat dalam berbagai tipe dan bentuk dalam mengolah hasil pertanian. Dalamlaporan skripsi ini, penulis membahas tentang rancang bangun mesin emping jagung. Sebelumnya perancang udah terlebih dahulu mengumpulan informasi dan data-data tentang apa aja yang perlu di persiapkan dalam rancang bangun tersebut. Tujuan perancang membuat alat ini adalah untuk mempermudah masyarakat atau petani ntuk mengolah hasil pertanian dalam konsep yang berbeda yaitu dengan menjadikan jagung menjadi sebuah cemilan yaitu menjadikannya menjadi Emping jagung Dalam rancang bangun ini  sistem mekanismenya menggunakan Motor listrik kemudian meneruskannya ke Gear box menggunakan v-belt , putaran out put gear box dihubungkan oleh sprocket dan rantai kemudian akan meggerakkan rol pemipih secara otomatis biji jagunag akan masuk kedalam celah roll dan keluar dalam bentuk pipih. Berdasarkan analisis peerancang denngan sistem roller akan memperemudah pekerjaan dalam pembuatan emping jagung
RANCANG BANGUN MESIN PENGUPAS BUAH NANGKA HORIZONTAL MENGGUNAKAN METODE PIRING ROTARI DAN MATA PISAU PEELER KAPASITAS 35 BUAH/JAM
Authors: Hutasoit Keny Repeu , Saragih Ardiantoni , Hasballah Hasballah , Sitanggang Hodmiantua
Published: May 2023

ABSTRAK

Pada umumnya proses pengupasan kulit buah nangka muda masih menggunakan peralatan manual yaitu dengan menggunakan pisau, hal tersebut bisa saja membuat pedagang mengalami luka akibat dari pisau saat mengupas kulit buah nangka muda tersebut. Tujuan Tugas Akhir ini adalah (1) Agar dapat membantu memudahkan masyarakat dalam pengolahan buah nangka dengan maksimal dari hasil produksinya, (2) Agar masyarakat dapat meningkatkan produktivitas pengolahan dari buah nangka, yang bisa meningkatkan perekonomian masyarakat, (3) Dapat mengetahui hasil atau kinerja dari mesin pengupas buah nangka yang telah selesai pembuatannya. Dari hasil analisa, maka didapatkan daya motor ialah 5,5 HP dengan putaran 3600 rpm. Panjang sabuk yang digunakan ialah 914 mm dan 1041 mm dari perhitungan besar puly pada mesin adalah 3 inchi berjumlah 2, 3,5 inchi ,dan 8 inchi dan puly pada poros berjumlah 4. Gearbox reducer yang digunakan ialah WPA 40. Panjang poros mata pisau 70 mm. Poros pada cak pemutar berdiameter 30 mm, bahan poros diperkirakan dari baja ST37 dengan kekuatan tarik  ( .
KAJIAN OPTIMASI METODE SPSS KEAUSAN PAHAT PERIPHERAL MILLING KERING PADA BAJA AISI 4140
Authors: Girsang Jonggi Raja , Hutajulu Ridwan S. , Hasballah T. , Parsaoran Saut
Published: May 2023

Keausan pahat adalah suatu masalah yang tidak bisa dihindari dalam suatu proses manufaktur. keausan pahat terjadi karena naikknya temperatur kontak antara pahat dengan benda kerja. Proses pemotongan logam merupakan salah satu proses penting dalam industri manufaktur, bahkan proses pemesinan telah menjadi inti dari industri manufaktur sejak revolusi industri. Tujuan dari penelitian ini yaitu Untuk mengetahui optimasi keausan pahat milling kering menggunakan metode spss pada penggunaan pahat milling end mill Karbida Tungsten pada penerapan milling. Penelitian dilaksanakan pada Bengkel SMK DWIWARNA Medan. Berdasarkan hasil penelitian dan analisis data Berdasarkan hasil penelitian dan analisis data tentang kajian optimasi keausan pahat peripheral milling pada Baja AISI 4140  Kecepatan potong ,Temperatur,Waktu Pemotongan dan Tebal Serpihan berpengaruh signifikan terhadap keausan pahat Karbida Tungsten. Hal ini di indikasikasikan oleh hasil analisis data yang dilakukan nilai sigKecepatan potong ,Temperatur,Waktu Pemotongan dan Tebal Serpihan< 0.05. Parameter Yang Paling Signifikan Mempengaruhi Keausan Permukaan dan Keausan sisi yaitu parameter temperatur. Hal ini diindikasikan oleh nilai sig paling kecil  yakni nilai temperatur0,468, dan 0,534.
RANCANG BANGUN MESIN CENDOL PORTABEL OTOMATIS DENGAN KAPASITAS TABUNG 3 LITER
Authors: Munandar Ricky , Putra Yoga Imanda , Sebayang Sawin , Purba Rasta
Published: May 2023

Cendol adalah panganan yang terbuat dari tepung beras dan sebagainya yang dibentuk dengan penyaring, kemudian dicampur dengan air gula dan santan. Cendol merupakan minuman penutup es manis yang mengandung tetesan tepung beras hijau, santan, dan sirup gula aren. Dengan adanya kemudahan dalam mendapatkan informasi tentang kuliner melalui teknologi, sehingga banyak orang yang membuka peluang usaha di bidang kuliner. Selain itu keberadaan teknologi yang semakin canggih memberikan pengaruh peluang usaha pada setiap aspek. Menanggapi perkembangan teknologi yang merupakan salah satu alternatif untuk memenuhi kebutuhan, dan juga untuk mempermudah pengusaha makanan atau minuman didalam memproduksi kulinernya terutama dalam bidang usaha minuman cendol. Maka solusi dalam permasalahan ini untuk meningkatkan efisiensi dan produktifitas dibuatlah mesin pencetak cendol portabel otomatis dengan kapasitas tabung 3 liter. Adapun fungsi kerja mesin ini yaitu mencetak cendol. Putaran dari motor stepper akan ditransmisikan ke poros screw, kemudian screw yang ada pada poros akan mendorong adonan keluar pada lubang yang terdapat dibawah tabung. Dari hasil perancangan mesin cendol ini, cendol yang dihasilkan panjang rata-rata 3 cm(30 mm), berdiameter 4 mm, dan dalam setiap putaran screw menghasilkan 65 cm3. Sumber penggerak utama yang digunakan pada mesin ini adalah stepper motor dengan daya 75 watt.
RANCANG BANGUN LENGAN MEKANIK PADA ALAT SISTEM SORTIR BUAH MENGGUNAKAN MIKROKONTROLER ARDUINO UNO
Authors: Prabowo Dwiki , Barus Jefri Cornelius , Sebayang Sawin
Published: May 2023

Dalam kehidupan yang semakin maju, kita sering melihat beberapa kegiatan manusia yang di gantikan dengan lengan mekanik, selain berguna untuk meringankan pekerjaan manusia, lengan mekanik juga di ciptakan untuk mengurangi tingkat kecelakaan kerja, meningkatkan tingkat ketelitian dari suatu benda, serta mempermudah dalam melakukan sesuatu. Lengan mekanik sendiri merupakan produk dari teknologi yang semakin maju. Banyak hal yang bisa di lakukan lengan mekanik itu sendiri, salah satu contoh nya adalah lengan mekanik pemilah buah. Buah yang sering kita konsumsi memiliki berbagai jenis dan bentuk nya baik dari warna bentuk serta rupanya. Dengan meletakkan beberapa logika pada lengan mekanik, beberapa buah dapat di sortir menggunakan lengan mekanik, sehingga proses pemilihannya lebih mudah serta lebih efisien.
ANALISA PANAS YANG DIBUTUHKAN UNTUK PROSES PIROLISIS LIMBAH OLI BEKAS
Authors: Laoli Chandro Dicky , Situmorang Pandu Maduma , Hasballah T. , Sitanggang Hotmiantua
Published: May 2023

Penggunaan kendaraan bermotor di Indonesia semakin meningkat seiring meningkatnya daya beli masyarakat Indonesia, dan semakin mudahnya kredit kepemilikan kendaraan bermotor. Sampai saat ini jumlah kendaraan bermotor diseluruh Indonesia terus meningkat pesat, maka dari itu peningkatan jumlah limbah oli bekas pun berbanding lurus dengan hal tersebut. Limbah pelumas bekas dapat dimanfaatkan sebagai suatu bahan bakar pengganti untuk menekan pengguanan bahan bakar fosil terutama di Indonesia. Ada pun proses pengolahan limbah oli bekas tersebut agar menjadi bahan bakar alternatif dapat di lakukan dengan proses pirolisis. Analisa yang dilakukan dibatasi pada pengujian ini jumlah oli bekas yang akan di uji 5 liter dan 10 liter, pengambilan data dilakukan setiap 10 menit sekali setelah minyak keluar pada tetesan pertama. Pengukuran temperatur terhadap alat pengujian untuk melihat temperatur pada reaktor , pipa saluran, dan kompor pengujian yang dilakukan pada beberapa titik untuk setiap sudut pengujian. Dari pengujian di dapat hasil perpindahan panas reaktor pada pengujian 10 liter oli bekas terjadi perpindahan panas sebanyak 710.521,59 W dan pada pengujian dengan jumlah oli bekas sebanyak 5 liter terjadi perpindahan panas sebanyak 665.154,54 W.
RANCANG BANGUN MESIN PENGUPAS BUAH AREN SEMI MEKANIS DENGAN KAPASITAS WAKTU PRODUKSI 80 KG/JAM
Authors: Hutagalung Chevin Leo Nardo , Muliadi Andri , Siahaan Enzo W.B , Sitanggang Hodmiantua
Published: May 2023

Banyak sekali permasalahan yang timbul yaitu dalam proses pengupasan kulit buah aren masih menggunakan cara yang terbilang tradisional atau manual. Untuk mendapatkan kolang kaling dibutuhkan proses yang cukup panjang dimulai dari proses pemilihan buah aren, perebusan, pengupasan, dan perendaman. Proses pengupasan buah aren merupakan proses yang menghabiskan waktu cukup lama serta dibutuhkan banyak sekali tenaga kerja. Maka dalam hal tesebut penulis merancang sebuah mesin pengupas buah aren dengan kapasitas waktu 80 kg/jam menggunakan penggerak motor listrik yang diharapkan penulis sangat bermanfaat bagi masyarakat untuk mempermudah pekerjaan. Maka pembahasan laporan tugas akhir ini memahami prinsip konsep operasi mesin, perhitungan elemen utama mesin, proses pembuatan mesin, anggaran mesin, diharapkan mampu menerapkan disiplin ilmu yang telah diperoleh, dapat membuat sebuah mesin yang dapat digunakan oleh masyarakat dengan baik dan turut serta memberikan teknologi yang tepat guna.
PERANCANGAN POMPA SENTRIFUGAL UNTUK WATER TREATMENT PLANT YANG DI GUNAKAN PADA PT. MULTIMAS NABATI ASAHAN
Authors: Sinaga Apriaman , Napitupulu Irvan , Sebayang Sawin , Hasballah T.
Published: May 2023

Kebutuhan distribusi air baku di Instalasi Pengolahan Air di kawasan industri PT mendorong pengembangan pompa sentrifugal ini.Multimas Nabati Asahan yang berjarak kurang lebih 6 kilometer dari sumber air ke lokasi IPA akan disulap menjadi air bersih. air dengan kapasitas 0,25 m3/s.Spesifikasi pompa yang tepat diperlukan untuk pendistribusian air baku ke IPA.Perhitungan yang akurat sesuai dengan data yang ada dan survey lapangan digunakan untuk memilih pompa yang sesuai.Total head pompa, pompa daya, pemilihan impeller, dan diameter pipa adalah semua faktor yang diperhitungkan dalam analisis.Jika desain dilakukan dengan cermat dan tepat, spesifikasi untuk pompa intake ini akan ditentukan sesuai dengan persyaratan.Dengan putaran motor sebesar 1450 rpm dan kapasitas Q = 0,25 m3/s dan H = 90 m, desain pompa ini menghasilkan hasil dengan diameter pipa 0,416 m dan aliran air turbulen di dalam pipa, tipikal f a level pump.2 karena pompa memiliki daya poros 245,25 kW pada diameter minimumnya dan digunakan untuk jangka waktu yang lama. poros 80 mm, sembilan bilah dengan ketebalan bilah 13,1 mm, lebar roda b1 = 60 mm dan b2 = 40 mm digunakan untuk impeller pompa.
PERENCANAAN MESIN DIGESTER YANG DIGUNAKAN DI PMKS PT. SOCFINDO ACEH SINGKIL
Authors: Tambunan Martin Paskah , Pasaribu Gurgur Aldorado , Sebayang Sawin , Silalahi Enzo W.B
Published: May 2023

Mesin digester merupakan salah satu mesin yang sangat vital dari sebuah pabrik kelapa sawit, pada digester proses pengolahan kelapa sawit berjalan sebagaimana mestinya. Jadi proses yang berjalan pada setiap mesin pada dasarnya saling mendukung dalam mengolah sesuatu untuk hasil yang terbaik. Proses mengarahkan digester melalui bagian-bagian yang berbeda agar motor digester bekerja secara optimal, termasuk untuk menghasilkan energi putaran yang dihasilkan oleh motor listrik yang dihasilkan dari arus listrik dari PLN. Hasil yang bisa dicapai dalam setiap jam proses itu berjalan, namun hasilnya tidak berjalan maksimal. Hasil pengolahan dari pabrik kelapa sawit berupa CPO (Crude Palm Oil), minyak mentah yang belum diolah untuk mendapatkan minyak terbaik, sehingga wajib untuk dicoba penyulingan minyak. Masih sedikit pabrik yang tersisa di Indonesia untuk mengolah hasil CPO, mayoritas produk CPO diekspor ke luar negeri.
Impacto en la implementación de herramientas digitales en procesos administrativos en empresas de ocotlán, Jalisco
Authors: Zúñiga Adriana Araceli Valdivia , Villaseñor Rosa Angélica Calderón , Jain María Luisa Villasano , Guerrero Ivonne Haydé Navarro , Barajas Claudia Karina Vaca , Hernández María Guadalupe Gómez
Published: May 2023

Hoy día existen organizaciones que aún se encuentran prematuras en la implementación de herramientas digitales, puesto que para algunos la tecnología los ha rebasado, y lo ven como un reto el hacer uso de ellas, lo anterior puede derivarse por diversas situaciones: falta de capacitación en su incorporación, resistencia al cambio, desmotivación, estrés tanto para el jefe como para los trabajadores, ya que se frustran ante el hecho de que les es difícil adaptarse , a pesar de que existen múltiples beneficios el incorporar estas herramientas tecnológicas, puesto que mejora la experiencia del cliente ya que digitalizar algunos procesos de la empresa, aumenta los niveles de retención de clientes. La presente investigación, se enfoca en indagar el impacto que, en la actualidad, han generado las herramientas digitales en las empresas de Ocotlán, Jalisco, que permita contar con empleados productivos y eficientes operativamente para su desempeño tecnológico.
SİBER AYLAKLIK VE SİBER ZORBALIĞIN AKADEMİK BAŞARI ÜZERİNDEKİ YORDAYICI ETKİSİNİN İNCELENMESİ
Authors: TEPE Nagihan , ERGÜNEY Merve
Published: May 2023

Bu araştırmanın amacı üniversite öğrencilerinin siber aylaklık ve siber zorbalık durumlarını inceleyerek bu durumların akademik başarıları üzerindeki yordayıcı etkisini araştırmaktır. Araştırma ilişkisel araştırma modeli çerçevesinde yürütülmüştür. Araştırmanın çalışma grubu Samsun Üniversitesi’nde öğrenim gören 2. 3. ve 4. sınıf öğrencilerinden uygun örnekleme yöntemi ile seçilen 222 öğrenciden oluşmaktadır. Araştırmada veri toplama aracı olarak “Siber Aylaklık Ölçeği”, “Siber Zorbalık Üçgeni Ölçeği” kullanılmıştır. Ölçekte ayrıca, öğrencilerin akademik başarılarını belirleyebilmek için bir madde ve kişisel bilgilerin yer aldığı bir bölüm yer almaktadır. Verilerin analizi için çoklu doğrusal regresyon analizi, t-testi ve Anova analizleri uygulanmıştır. Araştırma sonucunda elde edilen bazı bulgular şunlardır; öğrencilerin siber aylaklık ve siber zorbalık durumları akademik ortalamalarını anlamlı bir şekilde yordamakta ancak çok düşük düzeyde açıklamaktadır. Öğrenciler ortalamanın üzerinde siber aylaklık davranışı sergilemektedirler. Öğrenciler siber aylaklık yaptıkları zamanlarda en çok ‘içerik erişimi’ ve ‘paylaşım’ yapmakta en az ise ‘oyun/bahis’ alanlarında faaliyet göstermektedirler. Öğrencilerin sınıf düzeyleri ile siber aylaklık durumları arasında anlamlı bir ilişki bulunmamaktadır. Öğrencilerin siber zorbalık durumları ortalamanın oldukça altındadır. Bu kapsamda en yüksek durum siber seyirci boyutunda tespit edilmiştir.
Risco nutricional de pacientes com COVID-19 internados em uma unidade de terapia intensiva de referência em Joinville/SC
Authors: Jennifer Salles Jéssica , Turmina Juliano , Tomio Camila , Inez Medeiros Neiva , Barth Wanis Figueiredo Katherinne
Published: May 2023

Objetivo: Avaliar o risco nutricional em pacientes graves e críticos com COVID-19 utilizando a ferramenta de triagem nutricional mNUTRIC escore. Métodos: Trata-se de um estudo retrospectivo, com uma amostra total de 60 pacientes internados na UTI respiratória em um hospital público em Joinville, Santa Catarina, foram inclusos pacientes de ambos os sexos, com idade ≥18 anos, diagnosticada através do teste RT - PCR positivo, sob ventilação mecânica invasiva e em suporte nutricional via sonda enteral exclusiva. As características clínicas e informações antropométricas foram obtidas de prontuários eletrônicos e registros da nutrição. Resultados: Uma amostra de 60 pacientes com COVID-19 criticamente doentes foram incluídos no estudo, com média e idade entre 62,5 ± 24,5 anos. Com base no escore mNUTRIC da admissão na UTI, um alto risco nutricional (≥5 pontos)  foi observado em 58% dos pacientes, enquanto um baixo risco nutricional (<5 pontos). A mortalidade na UTI foi maior no grupo de alto risco nutricional do que no grupo de baixo risco nutricional. Conclusão: A mNUTRIC escore se mostrou uma ferramenta útil e prática no que diz respeito à triagem de pacientes com COVID-19 em tratamento na unidade de terapia intensiva, podendo ser relevante na previsão de prognóstico para pacientes criticamente doentes. Também foi observado que pacientes com SDRA, o sobrepeso e a obesidade estão associadas a menor mortalidade, o que pode ser considerado como fator de proteção, ficando evidente o paradoxo da obesidade.
Palavras-chave: Unidade de Terapia Intensiva. COVID-19. Escore NUTRIC modificado. Risco nutricional.
Aprendizado de máquinas aplicado ao mapeamento digital de solos na Antártica: modelagem e predição espacial de classes e atributos do solo
Authors:   , Siqueira Rafael Gomes
Published: May 2023

O mapeamento convencional de solos baseado em modelos mentais é uma abordagem comum para compreensão da distribuição dos solos na Antártica. No entanto, o Mapeamento Digital de Solos baseado em modelos empíricos e quantitativos tem sido escassamente aplicado no continente. As vantagens do mapeamento digital são de grande relevância em paisagens remotas como as áreas livres de gelo da Antártica, onde coletas de solos são muito limitadas. Além disso, existe uma necessidade de dados precisos de solos para a Antártica, especialmente sob as pressões impostas atualmente pelas mudanças climáticas e distúrbios antrópicos no continente. Neste trabalho foram preditas as distribuições espaciais, nas regiões da Antártica Marítima e Península Antártica, de importantes atributos físico-químicos do solo: areia, silte, argila, soma de bases, H+Al, pH, carbono orgânico total, P, Na e P remanescente; e de classes de solos identificadas com os sistemas Soil Taxonomy and World Reference Base – FAO. Para isso, foi utilizada a base de dados de solos do Grupo Terrantar da Universidade Federal de Viçosa - Brasil, compilada a partir de trabalhos de campo realizados durante 20 anos na Antártica. Também foi usado um grande conjunto de covariáveis preditoras representando os fatores do modelo scorpan: atributos do terreno gerados a partir de Modelo Digital de Elevação, dados multiespectrais Sentinel representando covariáveis de vegetação, distâncias euclidianas para geleiras, costa e pinguineiras, geologia, coordenadas e outros atributos do solo. Para a modelagem e mapeamento, técnicas de Aprendizado de Máquinas foram aplicadas e diferentes modelos foram testados, destacando-se o modelo Random Forest. Este estudo mostra o potencial da aplicação da metodologia do Mapeamento Digital de Solos para produção de mapas detalhados na Antártica, um continente geralmente negligenciado para mapeamentos devido à ausência de dados de solos robustos. Com nossos resultados, pretendemos subsidiar a tomada de decisão sobre solos na Antártica, além de fornecer dados pioneiros que podem ser incorporados em modelos ecológicos globais. Palavras-chave: Antártica. Aprendizado de Máquinas. Mapeamento Digital de Solos. Modelagem. Predição espacial.