bluuebunny/crossref_metadata_2025 huggingface dataset:
A Cross-Sectional Study of Pediatric First Aid Knowledge and Attitude among the General Population in the Makkah Region
Authors: Khizanah Ruba , Kambiji Gufran , Alfahmi Ajwaad , Alsairafi Jumanah , Khayyat Hanaa , Klantan Fatimah , Alharbi Ibrahim
Published: December 2023

Background: Children are highly susceptible to injury and death from accidents. Appropriate intervention can limit disability and increase survival (Alshammari, 2021). In this review, we aim to assess the knowledge and attitudes of the public towards pediatric first aid in the Makkah region of Saudi Arabia. Methods: In this cross-sectional study, a self-administered questionnaire was distributed among residents of the Makkah region. Descriptive statistics were employed to express numerical variables and categorical variables. A p-value of < 0.05 was considered statistically significant. Results: The study included 397 respondents. More than half were female (60.2%). Approximately one-third of the respondents were aged > 50 years, and 28.5% were working or studying in the medical field. Most participants had heard about first aid (99.5%) and believed that training was required to provide first aid (93.7%). However, less than half of the respondents (45.1%) had attended first-aid training once. Almost half of the respondents (51.6%) had previously encountered an injury, accident, or medical emergency; of these, 77.6% had provided first aid to the individual who experienced the emergency, and the most common types of emergencies included cut wounds (38.5%), burns (37.6%), and fits (25.4%). Conclusion: First aid is an important tool for providing immediate emergency care for all people, and it is particularly important for children. Knowledge of and attitude towards first-aid tools are essential for providing first aid when needed. In contrast, training in first aid is crucial for providing appropriate first aid, particularly for children and young infants.
The Effect of Zakat Fund Distribution and Economic Growth on Poverty in East Java Province
Authors: Pramesti Erdhilla , Fahrullah A'rasy
Published: December 2023

The goal of this study is to examine the relationship between zakat, economic growth, and poverty in East Java Province from 2003 to 2022, utilizing variables such as zakat money distribution, economic growth, and the number of poor people. The research approaches employed are the quantitative research approach and multiple regression analysis. Data on the distribution of zakat funds from financial statements published by BAZNAS East Java Province, economic growth percentage data from the Central Statistics Agency (BPS) website, and data on the number of poor people in East Java Province compiled from the Central Statistics Agency (BPS) website are the secondary data used. The study's findings revealed that the distribution of zakat monies influenced the direction of the negative coefficient on poverty. However, economic growth had no effect on poverty with a negative coefficient. The independent variable influences the dependent variable at the same time.
Analysis of Inflation and Poverty Levels on the Climate of Economic Growth in Jambi Province
Authors: Amry Ary Dean , Kasmiyati  , Narti Dwi
Published: December 2023

Inflation is the tendency of prices to rise generally and continuously. Based on data from BPS, the amount of inflation in Jambi City in 2022 is 0.79 %. CPI (Consumer Price Index) In Jambi City was 114.90. It shows that the growth of the Islamic economy is relatively low. The purpose of this study is to find out and analyze how the effect of inflation on the climate of Islamic economic growth in Jambi Province. This quantitative research was conducted in time series from 2011 to 2022. From the data obtained, the poverty rate influences 59% of the climate index of Islamic economic growth in Jambi Province. Showing that inflation does not affect Islamic economic growth because when the climate rate of Islamic economic growth increases by 1%, the inflation rate decreases by 1.55, which certainly has a very positive impact on the Islamic economic growth climate. Efforts are needed to increase the value of the Climate Index of Islamic economic growth, hoping that human progress will continue to develop.
Marketing Strategy of Sharia Pawn Products in Attracting Customer Interest
Authors: Mujibno  , Sasi Rohmah Awalia
Published: December 2023

The marketing strategy between sharia and conventional is very different in the process, but has the same goal, namely how to increase the number of customers. This study aims to determine the marketing strategy of sharia pawn products in attracting customers at the BMT Nu Pragaan Sumenep branch. This study uses qualitative methods, namely case studies and using techniques of observation, interviews, and documentation. The results of this study indicate that the marketing strategy for rahn products implemented by the BMT NU Pragaan Branch uses face-to-face communication via online, grebek pasar / field trips, supporting factors or facilities that assist managers in conducting marketing at BMT NU Pragaan Branch are Brochures and Website The official website contains complete information about all the products available at BMT NU. Marketing constraints for BMT NU Pragaan Sumenep branch in attracting customer interest, namely the number of competitors/competitors, but this does not affect customer interest because the number of customers continues to increase every year.
Pengaruh Kepemimpinan dan Lingkungan Kerja terhadap Kepuasan Kerja dengan Stres Kerja sebagai Variabel Intervening pada PT Wasteforchange Alam Indonesia
Authors: Jopanda Hendri
Published: December 2023

Sumber daya manusia merupakan salah satu kunci keberhasilan suatu organisasi. Hal ini karena sumber daya manusia yang membuat perusahaan berjalan sebagaimana mestinya. Kinerja karyawan yang baik akan mendorong tujuan organisasi, dan salah salah satu pendorongnya yaitu tingkat kepuasan kerja karyawan itu sendiri. Banyak hal yang dapat memengaruhi kepuasan kerja, beberapa diantaranya yaitu kepemimpinan, lingkungan kerja, dan stres kerja. Penelitian ini bertujuan untuk mengetahui serta menganalisis pengaruh kepemimpinan dan lingkungan kerja terhadap kepuasan kerja dengan stres kerja sebagai variabel intervening. Sampel yang digunakan dalam penilitian ini adalah seluruh karyawan pada PT Wasteforchange Alam Indonesia. Metode yang digunakan dalam penelitian yaitu Analisis Jalur dengan software SPSS 2.4 sebagai sarana untuk pengolahan data. Hasil penelitian menunjukkan bahwa kepemimpinan berpengaruh positif secara signifikan terhadap kepuasan kerja karyawan, lingkungan kerja berpengaruh positif secara signifikan terhadap kepuasan kerja karyawan, dan stres kerja berpengaruh negatif secara signifikan terhadap kepuasan kerja karyawan. Kepemimpinan berpengaruh negatif secara signifikan terhadap stres kerja dan lingkungan kerja berpengaruh negatif secara signifikan terhadap stres kerja. Kepemimpinan berpengaruh secara langsung terhadap kepuasan kerja tanpa melalui stres kerja, dan lingkungan kerja berpengaruh secara langsung terhadap kepuasan kerja tanpa melalui stres kerja.
PENGARUH INFLASI, SUKU BUNGA DAN KURS TERHADAP INDEKS HARGA SAHAM GABUNGAN PERIODE JANUARI 2011 – FEBRUARI 2015
Authors: Susan  , J.P
Published: December 2023

The aim of this study is to proof the influence of macro-economic, especially inflation, interest rate and exchange rate to composite stock price index in Indonesia Stock Exchanges. The data observed are secondary from the online system from Januari 2011 up to Februari 2015. The analytical technique used is multiple regression analysis. The result of this study found that the rate of inflation, interest rates and exchange rate are simultaneously have significantly influence on composite stock price index with Adjusted R 2 of 0,658, which means that 65,8% variance of composite stock prices index can be explained by the 3 variables and the rest is out this study. Partially, found that the variable inflation rate does not influence on composite stock price index, while the variable interest rates has a negative and siginficant influence on the composite stock price index, and the variable rate has a positive and significant influence on composite stock price index.
PERAN PUBLIC RELATIONS DALAM MEMBANGUN CORPORATE IMAGE MELALUI PROGRAM COMMUNITY DEVELOPMENT
Authors: Sandra
Published: December 2023

in the last decade, company believed their reputation and corporate image is two things that really important for company concern. Their existence is really need the support from public. Corporate sosial programs held in order to strehgthen the sustainability of the campany in a region, by building coopertion among stakeholder by arranging community relation program. For development sosial programs, public relations needs to observe by using the stages in the process for the developing community relations.
PENGARUH SUPERVISI AKADEMIK, MOTIVASI KEPALA SEKOLAH DAN LINGKUNGAN KERJA TERHADAP PENINGKATAN KINERJA GURU DI SMA YADIKA 8 JATIMULYA BEKASI
Authors: Elsye  , Darlius
Published: December 2023

This study aims to describe and analyze the influence of the academic supervision, motivation of principal, and the work environment to the improvement of teacher performance and de termine which variables are most strongly affect the performance of teachers. The study population was 60 high school teachers Yadika 8 Jatimulya and the entire population of the research sampled . Samples were taken with the Proportional techniques clust errandom sampling. Techniques of data collection using questionnaire instruments. Validity of the items tested by product moment correlation person, while the coefficient of reliability was tested with Cronbach alpha formula. Strong relationship occurs between the academic supervision, motivation of principal and the work environment with teacher performance improvement. Variable the motivation of principal has more influence on the improvement teacher performance than academic supervision and the work environment. Furthermore, there is simultaneously a significant positive effect of joint between the academic supervision, motivation of principal and the work environment to the improvement teacher performance. A partial significant positive effect on improving performance of academic supervision, motivation of principal and the work environment to the improvement of teacher performance.
PENGARUH LINGKUNGAN KERJA, KOMPENSASI PELENGKAP, DAN PERKEMBANGAN KARIR TERHADAP LOYALITAS KARYAWAN DI PT INDOLAKTO
Authors: Roni Hermanto  , Darlius
Published: December 2023

This research was conducted to analyze the effect of the work environment, fringe benefit, and career development to employee loyalty at PT Indolakto. Samples used in this research were 100 employees at the level of supervisors and managers. Collecting data using questionnaires were analyzed using path analysis. Results of the analysis showed that the work environment directly influence employee loyalty with total direct effect and indirect effect amounted to 37,24%, work environment directly influence career development amounted to 38.62%, fringe benefit directly influence employee loyalty with total direct effect and indirect effect amounted to 26.13%, the fringe benefit had an indirect effect on career development for 6,14%, career developmnet directly influence employee loyalty with total direct effect and indirect effect amounted to 39.42%. In order to increase the loyalty of employees at PT Indolakto, things that can be done such as care about physical environment and non-physical environment, give fringe benefit or allowances according to the needs of employees, and then making plans regarding career development of employees and given the opportunity for more advanced.
ANALSIS ORGANISASI DAN MANAJEMEN UNIVERSITAS SATYA NEGARA INDONESIA (USNI)
Authors: Siagian Arifin
Published: December 2023

The organization of USNI orientates to the goal, therefore the structure and the design of the organization also orientates to the goal. The principal of USNI should conceive the structure a tool of contribution for reaching the goal of USNI effectively. The prinsipal of USNI should also notice several factors i.e. technology, the characteristic of job, lecturers and employees, environmental requirement, the importance of accepting and processing the information from environment and whole strategy which been choosen to reach the goal of USNI.
PENGARUH SISTEM INFORMASI AKUNTANSI DAN MOTIVASI TERHADAP KINERJA INDIVIDU (STUDI KASUS PADA PT. DHL SUPPLY CHAIN INDONESIA)
Authors: Sidauruk Tagor Darius , Endang Widuri
Published: December 2023

The purpose of research is to know influence information accounting system and motivation to individual performance. The sample in this research includes 90 respondences worked at central office PT.DHL Supply Chain Indonesia. The sampling method is probability sampling. The collected of data used primary data and with reading information accounting system books. Test of data quality in this research are validity and reliability. Hypotesis test used multiple linier regression. The result in this research are information accounting system and motivation have significant influance to individual performance.
ANALISIS PENGARUH OPERATING LEVERAGE , FINANCIAL LEVERAGE, DAN LIQUIDITY TERHADAP RENTABILITAS PERUSAHAAN DIBIDANG PERTANIAN YANG TERDAFTAR DI BEI (Tahun 2011-2015)
Authors: NOVIARTI
Published: December 2023

The purpose of this study was to determine the effect of Operating Leverage, Financial Leverage and Liquidity partially and simultaneously to profitability. The data used in this research is secondary data obtained from IDX is the company's financial statements from 2011-2015. The sample in this study is the Agricultural sector companies listed on the Indonesia Stock Exchange. This research applies multiple linear regression analysis using SPSS 23 (Statistics Package for the Social Sciences) for Windows. Results of the analysis showed that adjusted determination coefficient (adjusted R-square) of 0.2704 or 27.04%. Based on t test Operating Leverage is known that partially negatively affect the company's profitability in the agricultural sector, this is evide nced by the t test showed a smaller significance level of 0.05 is 0.003. T test also showed that financial leverage is partially not affect the company's profitability in the agricultural sector, this is evidenced by the t test showed significance level greater than 0.05 is 0.096. Liquidity, and a positive significant effect on the profitability of companies in the agricultural sector in the years 2011-2015 BEI. Based on hypothesis testing table 0095 t-test with significance 0.025 <0.05.Hal means Liquidity significant effect on profitability and acceptable hypothesis.
PENGARUH KEPEMIMPINAN, DISIPLIN DAN KEPUASAN KERJA TERHADAP KINERJA GURU DI SMK NEGERI JAKARTA
Authors: Murrianto  , Robi Wijaya
Published: December 2023

The influence of leadership, job satisfaction and performance Disciplines teacher in SMK Negeri Jakarta. In this study method survey method is used to select the samples randomly from 150 teachers SMK Negeri Jakarta. This study uses the techniques collection is done by making a good questionnaire for a free variable or variable instruments attached. The instrument was tested using the test validity is calculated using SPSS application 16 version softwere through comparison of r and r count table, while for reliability test instrument is calculated by using the formula alpha cron bach. Hypothesis testing in this study using a simple linear regression techniques, correlation of pearson and regression. Resulting in some important points are: 1. There is a relationship between leadership performance. 2. There is a relationship between the disciplines with the performance of teachers. 3. There is a relationship between job satisfaction with the performance of teachers. 4. There is a relationship between the disciplines with the leadership.
ANALISIS PENGARUH KOMPENSASI KERJA, MOTIVASI KERJA DAN DISIPLIN KERJA TERHADAP KINERJA PEGAWAI
Authors: JUMAGI  , Siregar Edi
Published: December 2023

This research is motivated decline in employee performance PT.Detede. This study aimed to examine the effect of labor compensation, motivation and work discipline, to employee performance in PT. Detede. Research data retrieval is done through questionnaires to 65 respondents employees PT. Manunggal Metalindo Karsa obtained by using the technique jenuh sampling. Then analysis of quantitative and qualitative data. Qualitative analysis is the interpretation of the data obtained from the respondents and the data obtained from the field. Data - data that has met the validity, reliability, and classical assumption, processed with SPSS (Statistical Package for Social Science) for Windows 15. Where hypothesis testing using t test showed that the three independent variables are labor compensation (X1), work discipline (X2), and the work discipline (X3) significant positive effect on employee performance dependent variable (Y).
Pengaruh Periklanan, Citra Merek, Dan Penjualan Perorangan Terhadap Keputusan Pembelian Voucher Avatar Ayodance Mobile Di Indonesia
Authors: Gracelia Tanudjaja  , Siagian Arifin
Published: December 2023

Penelitian ini dilakukan pada Komunitas Ayodance Mobile pada Tahun 2018 seluruh event-event yang diadakan oleh megaxus diseluruh kota di Indonesia, Pengambilan sampel menggunakan metode Quota sampling karena jumlah tertentu (kuota) dengan ciri-ciri tertentu pada pembelian handphone merek samsung dan lebih sederhana karena pengambilannya sampel dari populasi dilakukan secara acak tanpa memerhatikan strata yang ada dalam populasi itu. Untuk mengetahui bagaimana pengaruh antara variabel kualitas periklanan, citra merek danpersonal selling terhadap keputusan pembelian maka digunakan analisis regresi linier berganda, uji-F dan uji t digunakan untuk mengetahui signifikan tidaknya hubungan antara variabel, Periklanan, citra merek, danpersonal sellingterhadap keputusan pembelian. Responden yang di ambil yaitu komunitas sebanyak 100 responden yang mewakili komunitas Ayodance. Penelitian ini dapat disimpulan Hasil analisis uji regresi antara Keputusan Pembelian (Y) yang dapat dijelaskan adanyapengaruh signifikan antara ketiga variabelsecara bersama-sama keputusan pembelian oleh Advertising, Brand Image, dan Personal Sellingsebesar 41,1% dan sisanya 58,9% dapat dijelaskan oleh faktor-faktor lain yang tidak terdapat dalam penelitian ini. Pada penelitiaan ini sendiri tidak terdapat pengaruh Periklanan terhadap keputusan Pembelian Avatar Ayodance Mobile untuk komunitas Ayodance Mobile di Indonesia. Untuk Personal Selling sangat berpengaruh signifikan
Pengaruh Kompensasi, Lingkungan Kerja Terhadap Kinerja Guru Melalui Motivasi Kerja Di SMA Kristen Kanaan
Authors: Romantika Putri Delima  , Agus Fauzi
Published: December 2023

Based on the results of the analysis it is known that of the two structural models studied, in the first model, Work Motivation as an endogenous variable, Compensation is the dominant factor affecting Work Motivation when compared to the Work Environment. In structural model 2 which places Performance as an endogenous variable, it is known that Work Motivation is the dominant factor, then compensation and finally work environment. Based on these findings, the priority of increasing compensation and work environment can be done through increasing work motivation, in addition to the work environment and work motivation of the teacher. The indirect effect of compensation on performance through motivation has an effect of 28.6% and followed by the indirect effect of the work environment on teacher performance through work motivation by 16%.
Pengaruh Budaya Organisasi, Kepemimpinan, Lingkungan Kerja Dan Motivasi Sebagai Variabel Intervening Terhadap Kinerja Dosen Politeknik Di Kota Bekasi
Authors: Pane Diapari Sosagaon Putra , Sitorus Guston
Published: December 2023

Penelitian ini bertujuan untuk mengetahui pengaruh Budaya Organisasi, Kepemimpinan, Lingkungan Kerja dan Motivasi sebagai variabel intervening terhadap Kinerja Dosen Politeknik di Kota Bekasi. Penelitian ini menganalisis data dari sampel sebanyak 99 dosen yang diambil dengan menggunakan metode stratifikasi random sampling dari populasi sebanyak 132. Dosen tersebut adalah dosen yang mengajar pada Politeknik di Kota Bekasi. Pengambilan data dilakukan mulai dari Januari-Maret 2019. Analisis data menggunakan model SEM dengan menggunakan program AMOS versi 22,0. Hasil penelitian ini menunjukkan Budaya Organisasi berpengaruh positif terhadap motivas, Kepemimpinan berpengaruh positif terhadap motivasi, Lingkungan kerja berpengaruh positif terhadap motivasi, Motivasi berpengaruh positif terhadap kinerja dosen, Budaya organisasi berpengaruh positif terhadap kinerja dosen, Kepemimpinan berpengaruh positif terhadap kinerja dosen, Lingkungan kerja berpengaruh positif terhadap kinerja dosen, Budaya organisasi berpengaruh terhadap kinerja dosen melalui motivasi, Kepemimpinan berpengaruh terhadap kinerja dosen melalui motivasi dan Lingkungan kerja berpengaruh terhadap kinerja dosen melalui motivasi.
Determinan Return On Asset Bank Umum Konvensional Yang Tercatat Di Bursa Efek Indonesia Periode 2013 - 2017
Authors: Yusran Thaher  , Siagian Arifin
Published: December 2023

Dari hasil penelitian rasio CAR, LFR, NPL, NIM dan BOPO secara bersama-sama memengaruhi ROA di perbankan konvensional yang terdaftar di Bursa Efek Indonesia periode 2013 – 2017 secara signifikan. Untuk pengujian goodness of fit yang diukur dengan koefisien diterminasi (R2) menunjukkan angka koefisien sebesar 0.946039 yang berarti bahwa seluruh CAR, LFR, NPL, NIM dan BOPO dapat menjelaskan variasi naik turunnya ROA perusahaan perbankan sebesar 94.60%, sementara sisanya 5.40% dijelaskan oleh faktor-faktor lain yang tidak diteliti dalam model ini.
Pengaruh Komitmen Organisasi, Pelatihan Kerja Dan Motivasi Berprestasi Terhadap Kinerja Karyawan PT. Bangun Putra Pesaka
Authors: Adziyah  , Meifida Ilyas
Published: December 2023

Penelitian ini bertujuan menguji dan menganalisis pengaruh Komitmen Organisasi dan Pelatihan dengan motivasi sebagai intervening variabel terhadap Kinerja karyawan PT. Bangun Putra Pesaka. Jenis pendekatan penelitian yang digunakan kuantitatif. Teknik samplingnya adalah sampling jenuh dengan sampel sebanyak 77 responden. Teknik pengumpulan data melalui kuesioner. Metode analisis yang digunakan analisis regresi linier berganda. Hasil penelitian menunjukkan bahwa: pengaruh Komitmen Organisasi, Pelatihan dan Motivasi berprestasi secara simultan berpengaruh signifikan (89%) terhadap kinerja karyawan di PT.Bangun Putra Pesaka.Motivasi berprestasi berpengaruh signifikan positif (46,1%)terhadap kinerja karyawan. Komitmen organisasi berpengaruh signifikan positif (26,5%) terhadap kinerja karyawan di PT. Bangun Putra Pesaka.Pelatihan berpengaruh positif (26,1%) terhadap kinerja karyawan di PT. Bangun Putra Pesaka.Saran penelitian yakni Atasan harus tetap selalu melakukan monitoring karyawan dalam bekerja memberikan motivasi dan memberikan dan menfasilitasi pengadaan Pelatihan agar kualitas kinerja karyawan semakin produktif dalam menjalankan aktifitas perusahaan.
PENGARUH BUDAYA ORGANISASI, KOMPETENSI DAN FASILITAS TERHADAP KEPUASAN PENGGUNA DI PUSAT PERPUSTAKAAN UNIVERSITAS ISLAM NEGERI (UIN) SYARIF HIDAYATULLAH
Authors: Ilyas Rikas Putra  , Anwar Prabu Mangkunegara
Published: December 2023

User satisfaction is an important topic because it can provide information that can be used by an organization to evaluate its final position. This study aims to determine the effect of organizational culture, competence and facilities on user satisfaction at the Syarif Hidayatullah State Islamic University (UIN) library center. The method used in this research is quantitative research using survey research methods. The quantitative research used in this study is associative in nature with the aim of knowing the relationship between two or more variables, so that it can explain and control a symptom. The results of this study can be interpreted that simultaneously organizational culture, content, and facilities have a significant effect on user satisfaction at the UIN Syarif Hidayatullah Library Center. Partially, organizational culture and facilities have a significant influence on user satisfaction at the Syarif Hidayatullah UIN Library Center, only competence partially has no effect on user satisfaction at the Syarif Hidayatullah UIN Library Center.
PENGARUH MARKETING MIX TERHADAP PENJUALAN PADA INDUSTRI MANUFAKTUR PT. DWISELARAS JAYAPACK
Authors: Rina Angelina  , Yosi Stefhani
Published: December 2023

In achieving marketing goals, of course using marketing tools, the marketing mix (Marketing Mix) which has a strong influence on prices, products, people, processes, promotions, physical evidence and also place.PT. Dwiselaras Jayapack is a printing manufacturing industry, producing raw goods into finished goods using tools, equipment, machines, on a large scale. This study aims to analyze the effect of Marketing Mix on sales in the manufacturing industry of PT. Dwiselaras Jayapack. This research is a quantitative causal research that aims to determine the relationship between two or more variables. The population and sample of this research are consumers of PT. Dwiselaras Jayapack, totaling 58 consumers, consisting of companies represented by the marketing department and individuals. Data was collected by means of a questionnaire. The method of data analysis used multiple regression analysis. The results of the research that obtained the Marketing Mix (Product, Price, Place, Promotion, Person or Staff, Process, Physical Evidence) had a positive and significant effect on sales simultaneously. While partially, the variables of the Marketing Mix (Product, Price, Place, Promotion, Person or Staff, Process, Physical Evidence) also have a positive and significant influence on sales in the manufacturing industry of PT. Dwiselaras Jayapack.
PENGARUH KECERDASAN EMOSI DAN SELF EFFICACY TERHADAP PRODUKTIVITAS KERJA MELALUI MOTIVASI KERJA (STUDY PADA KARYAWAN RUMAH SAKIT IBU DAN ANAK BINA MEDIKA)
Authors: Heni Suhaeni  , Agus Fauzi  , Sitorus Guston
Published: December 2023

This study aims to determine the effect of the variable emotional intelligence and self-efficacy partially or simultaneously on work productivity through work motivation. The population of this study using random sampling is all employees of RSIA Bina Medika taken randomly. The sample data used are 147 samples from 223 employees. The research design is quantitative research. The method of data collection in this research is to conduct surveys and distribute questionnaires using digital forms. In addition, there are several methods of data analysis in this study, namely descriptive analysis, classical assumption test, multiple linear regression test and path analysis test. The types of data used in this study are primary and secondary data. The results of the simultaneous and partial test prove that the variables of emotional intelligence and self-efficacy on work productivity through work motivation have an effect on each other. This is evidenced by the F test obtained that the calculated F value is 4.330 with a significant level of 0.001 which is smaller than alpha 0.05 (5%). The calculated F produced is 4.330, which is greater than the F table, which is 3.06. Thus, simultaneously emotional intelligence and self-efficacy have a positive and significant effect on work motivation. Thus, simultaneously emotional intelligence, self-efficacy, and work motivation have a positive and significant effect on work productivity.
PENGARUH KOMPETENSI, DISIPLIN KERJA, DAN LINGKUNGAN KERJA TERHADAP KINERJA PEGAWAI PADA LEMBAGA KURSUS DAN PELATIHAN JUWITA DI KABUPATEN LEBAK
Authors: Alfin Nugraha  , Noviarti
Published: December 2023

This research is related to how the influence of competence, work discipline and work environment on employee performance at the Juwita Course and Training Institute in Lebak Regency. The purpose of this study is to identify and analyze the effect of competence, work discipline and work environment simultaneously on employee performance, to identify and analyze the effect of competence partially on employee performance, to determine and analyze the effect of work discipline partially on employee performance, to determine and analyze the effect of the work environment partially on employee performance. Respondents in this study were 100 respondents from Juwita Course and Training Institute students. Methods of data collection using questionnaires. In this research design using Quantitative Causal research, which aims to determine the effect of one or more independent variables on the dependent variable. Data processing is carried out using the Multiple Linear Regression Analysis Model with the help of the SPSS program. The results of this study indicate that the competency variable has a positive and significant influence on employee performance by (0,009), the work discipline variable has a positive and significant effect on employee performance by (0,018), the work environment variable has a positive and significant effect on employee performance by (0,010).
Wind energy systems adapted to the seawater greenhouse desalination unit designed for arid coastal countries
Authors: Mahmoudi Hacene , Abdul-Wahab Sabah Ahmed , Goosen Mattheus F.A. , Ouagued Abdallah , Sablani Shyam , Spahis Nawel
Published: December 2023

The wind energy can be used to power the seawater greenhouse. The aim of this study is to present the feasibility of wind energy in the seawater greenhouse desalination unit. The seawater greenhouse combines fresh water production with growth of crops in a greenhouse system. The technique is adapted for farms in arid coastal regions that are suffering from salt infected soils and shortages of potable groundwater. The dimension of the greenhouse has the greatest effect on the water production and energy consumption. A wide shallow greenhouse (200 m wide by 50 m deep) has been found to give 297 litres per day of fresh water in only eight hours (between 09.00 and 17.00). The greenhouse produces 98 % of total fresh water. This interval corresponds to the higher winds period.
Modelling of transport and recombination of photocarriers in un-doped hydrogenated amorphous silicon (a-Si:H)
Authors: Tobbeche Souad , Merazga Amar
Published: December 2023

In this paper, we report on the simulation of steady state photoconductivity in un-doped a- Si:H at temperatures from 30 to 500 K. The model is based on recombination at dangling bond states and band tail states. It takes also into account the hopping transitions in the conduction hand tail states to describe the conduction in localized states at low temperatures. At high temperatures, the multiple trapping process is considered to describe the conduction in extended states. The density of states includes the exponential density of conduction band tail states and valence band tail slates and the density of dangling bond states. This later is determined by the Defect Pool Model ‘DPM’. The experimental features observed on the temperature dependence of the photoconductivity are generally the thermal quenching, the low activated region and the temperature independent photoconductivity at very low temperatures. All these observations are well reproduced by the model in un-doped a-Si:H. By the examination of the relative contributions of two processes of conduction: (i) the multiple trapping and (ii) the multiple trapping associated with the hopping, the model results show that the multiple trapping process of electrons where the conduction is assured by free carriers in the thermal quenching region above 140 K is important while the hopping process of electrons is negligible. At 140 K and below, the hopping transport of electrons in the conduction band tail states makes an important contribution in the photoconductivity. It explains successfully the low activated region and the temperature independent photoconductivity at very low temperatures.
Reconstitution des irradiations globale et diffuse en fonction de quelques paramètres météorologiques pour un ciel quelconque
Authors: Koussa Mustapha , Haddadi Mourad , Malek Ali
Published: December 2023

L’objectif de ce travail est de vérifier l’application des modèles permettant de reconstituer les moyennes mensuelles par jour des irradiations globales et diffuses sur un plan horizontal. Les modèles choisis ont été proposés dans la littérature par différents scientifiques et relatifs à plusieurs sites dans le monde. Ces modèles sont fonction des principaux paramètres météorologiques, comme la température ambiante, l’humidité relative, la durée d’insolation et de quelques paramètres astronomiques, tels que la déclinaison du soleil, la durée astronomique du jour, la constante solaire, la variation de la distance terre soleil et de la moyenne mensuelle par jour de l’irradiation extraterrestre calculée sur un plan horizontal à la limite de l’atmosphère. Ainsi, nous avons confronté ces modèles aux valeurs réellement mesurées sur plusieurs sites du territoire national; Bouzaréah, comme site côtier, Batna sur les Hauts Plateaux, Ghardaïa et Adrar au Nord et au Sud du Sahara. Comme résultats, nous avons constaté que selon les caractéristiques climatiques respectives au site considéré, certains modèles sous-estiment ces composantes, d’autres les surestiment alors que d’autres sont en bonne concordance avec les valeurs mesurées. Ainsi les modèles, que nous avons retenus, sont respectivement les modèles de Hussain et al. et celui de Garg et al. pour l’estimation de l’irradiation globale et les modèles de Erbs, Klein et Duffie et celui de Liu & Jordan pour la reconstitution de la composante diffuse.
Etude expérimentale d’une couche limite perturbée en amont d’une plaque
Authors: Hallek Khouloud , Bouterra Mourad , El Cafsi Afif , Beghith Ali , Lusseyran François , Gougat Pierre
Published: December 2023

On se propose d’étudier et de caractériser expérimentalement l’effet d’une perturbation sur le profil de la couche limite se développant le long d’une plaque mince. Cette perturbation a été provoquée par la présence d’un papier de verre placé sur le bord d’attaque sur le bord d’attaque d’une plaque mince. L’étude a porté sur deux valeurs différentes de rugosité. Les mesures expérimentales ont été réalisées à l’aide de la vélocimétrie par fil chaud. Les résultats obtenus montrent que la transition de l’écoulement s’effectue pour une rugosité  = 6.0 mm, à partir d’une vitesse débitante U = 4.9 m / s.
Design of a neural network control scheme for the maximum power point tracking (MPPT)
Authors: Aït Cheikh Mohamed Salah , Haddadi Mourad , Zerguerras Ahmed
Published: December 2023

This paper proposes a control method for the maximum power point tracking (MPPT) of a photovoltaic system and this with the aim of increasing the output power of a photovoltaic system. An electronic controller is built-in between the photovoltaic generator and the load, whose principal role is the permanent monitoring of the maximum power point of the PV generator commonly called MPPT (Maximum Power Point Tracking) and that in general by acting on a DC-DC converter device. The contribution of this paper resides at the level DC converter device. The contribution of this paper resides at the level of the electric output of the converter, which can be estimated thru three state variables, which are the solar insolation, the temperature of the junction and information on the dynamics of the charging voltage if it exists.
Modélisation et simulation numérique des transferts fluidique et thermique dans le canal et couches cathodiques d’une PEMFC
Authors: Ben Moussa Hocine , Haddad Djamel , Oulmi Kafia , Zitouni Bariza , Mahmah Bouziane , Belhamel Maiouf
Published: December 2023

A l’issue de cette étude, des phénomènes ayant lieu lors du fonctionnement d’une pile à combustible à membrane échangeuse de protons (PEMFC) ont pu être analysés. Un modèle, bidimensionnel transitoire de l’écoulement de gaz, et de transfert de chaleur dans la partie cathodique: canal, couche de diffusion, et couche de catalyseur, est présenté. Une approche bidimensionnelle a été choisie selon deux plans, longitudinal (P1) et transversal (P2). Les équations de conservation utilisées sont l’équation de continuité, l’équation de mouvement, et l’équation d’énergie. Ces équations ont été résolues numériquement en utilisant la méthode des volumes finis, sous un programme informatique (Fortran) développé localement. L’objectif de ce travail est l’obtention des profils et champs de vitesse des gaz dans le canal, la couche de diffusion (GDL) et la couche de catalyseur, ainsi que le profil et champ de température. On s’est intéressé à l’étude de l’effet des paramètres, perméabilité et nombre de Reynolds, sur l’écoulement, et l’effet des paramètres, perméabilité et la surtension cathodique sur les profils de température.
Single layer drying behaviour of grenade peel in a forced convective solar dryer
Authors: Idlimam Ali , Ethmane Kane Cheikh Sidi , Kouhila Mounir
Published: December 2023

Solar drying experiments in thin layer of grenade peel were conducted in forced convection solar dryer consisting of a solar air collector, an auxiliary heater and a drying cabinet. Moreover, grenade peel is sufficiently dried in the ranges of 32 °C to 36 °C of ambient air temperature, 45 to 70 °C of drying air temperature, 32 to 53 % of relative humidity, 0.028 to 0.056 m3s-1 of drying air flow rate and 200 to 950 W/m2 of daily solar radiation. The experimental drying curves show only the falling drying rate period. The main factor in controlling the drying rate was the drying air temperature. The drying rate equation is determined empirically from the characteristic drying curve. Twelve mathematical models were tested to fit the experimental data. The Midilli-Kucuk model was found to satisfactorily describe the solar drying curves.
Solar tracking system with fuzzy reasoning applied to crisp sets
Authors: Louchene Ahmed , Benmakhlouf Abdeslam , Chaghi Abdelaziz
Published: December 2023

In this paper, a low cost and an easy to implement solar tracker system is presented. The design of the system is based on the fuzzy reasoning applied to crisp sets. In this case, it can be easily implemented on general purpose microprocessor systems. Four light sensitive devices, such as LDR, photodiodes or phototransistors are mounted on the solar panel and placed in an enclosure. The four light detectors are screened from each other by opaque surfaces. Each pair of the light sensors is used to inform the controller on the orientation of the solar panel vertically and horizontally respectively.
Expérimentation d’un système de pompage photovoltaïque avec un générateur refroidi par ruissellement d’eau et équipé d’un réflecteur plan
Authors: Chachoua-Harmim El Yakout , Harmim Arezki , Mammeri Abdelkrim
Published: December 2023

Cet article porte sur l’étude expérimentale d’un système de pompage photovoltaïque, dont le générateur est équipé d’un réflecteur plan pour augmenter l’irradiation solaire incidente sur le plan des panneaux. Afin de réduire l’effet de l’élévation de la température des panneaux, une petite fraction de l’eau pompée est utilisée pour refroidir le générateur à travers une canalisation de distribution qui assure un ruissellement en film sur la surface avant du générateur. L’étude expérimentale a montré qu’on arrive à abaisser la température des panneaux et par la suite garder un meilleur rendement du système.
Characterization of semi-insulating GaAs:Cr by means of DC-CPM technique
Authors: Tibermacine Toufik , Merazga Amar
Published: December 2023

In the present paper, constant photocurrent method, ‘CPM’ is used to determine the defects distribution from the optical absorption spectra of semi-insulating Cr-doped GaAs. By using the derivative method, we have extracted the distribution of the density of states DOS close to valence band edge Ev from the measured optical absorption spectrum. We have also developed a computer code program dc-CPM which have been used to compute the total absorption spectrum and their components using a model density of states inferred from two complementary techniques: constant photocurrent method, ‘CPM’ and transient photocurrent ‘TPC’. It is found that by combination of the two measurement techniques ‘CPM’ and ‘TPC’, and the two absorption spectra components and , we are able to have a full reconstruction of the density of states distribution below and above the Fermi level for such materials.
Energy and exergy efficiency of a daily heat storage unit for buildings heating
Authors: Hazami Mejdi , Kooli Sami , Lazâar Meriem , Farhat Abdelhamid , Belghith Ali
Published: December 2023

This paper deals with a daily solar storage system conceived and built in Laboratoire de Maîtrise des Technologies de l’Energie (LMTE, Borj Cedria). This system consists mainly of (i) a heat storage unit which consists of a wooden case with dimension of 5 m3 (5 m x 1 m x 1 m) filed with fin sand, (ii) a heat collection unit which consists of 5 m2 of south-facing solar collector mounted at a 37° tilt angle and (iii) a network of a polypropylene capillary heat exchanger with an aperture area equal to 5 m² buried inside the heat storage unit and connected to the heat collection unit. The circulation of the heated water between the heat collection unit and the polypropylene capillary heat exchanger allows heating the sand inside the heat storage unit. In order to evaluate the system efficiency during the charging period (during the day) and discharging period (during the night) an energy and exergy investigation were applied. Results showed that during the charging period, the average daily rates of thermal energy and exergy stored in the heat storage unit were 400 and 2.8 kW, respectively. It was found that the net energy and exergy efficiencies in the charging period were 32 % and 22 %, respectively. During the discharging period, the average daily rates of the thermal energy and exergy recovered from the heat storage unit were 2 kW and 2.5 kW, respectively. The recovered heat was compared to the total heat requirements of a tested room (4 m x 3 m x 3 m). The results showed that 30 % of the total heating requirement of the tested room can be achieved from the heat storage system during the whole night until in cold seasons.
Analyse dynamique des générateurs éoliens lors d’un creux de tension du réseau
Authors: Mekhtoub Said , Ibtiouen Rachid , Bacha Seddik
Published: December 2023

Le générateur asynchrone est de plus en plus utilisé dans les systèmes de production éoliens. Le générateur asynchrone à double alimentation est le mieux adapté pour les systèmes éoliens comparativement au générateur autonome qui sert à alimenter des endroits isolés. Dans notre étude, nous avons présenté le modèle du générateur en tenant compte de l’effet de saturation dans le système d’axes d-q. Nous avons appliqué ce modèle dans le cas d’une coupure du réseau électrique afin d’analyser la répercussion sur la dynamique des courants dans le générateur et ce pour les deux types de générateurs autonome et à double alimentation. Dans le cas du générateur autonome, des résultats expérimentaux sont présentés et comparés à ceux issus de la simulation.
Développement de deux modèles neuro-flous pour la poursuite du MPPT des modules photovoltaïques UDTS-50 Application au site d’Adrar
Authors: Mehdaoui Ahmed , Chaker Abdelkrim , Zerikat Mokhtar , Messikh Lotfi
Published: December 2023

Dans cet article, nous développons deux modèles neuro-flous pour l’estimation du MPPT, à partir de la connaissance du courant de court-circuit et de la tension de circuit ouvert. La base de données d’apprentissage utilise des données réelles issues des tests de caractérisation ‘out door’ d’un ensemble de modules photovoltaïques, type UDTS-50. Les résultats obtenus montrent qu'il est possible d’estimer le courant optimal comme une fonction linéaire du courant de court-circuit. Ces résultats montrent aussi que l’estimation de la tension optimale est le problème qui pose le plus de difficultés.
Optimisation d’un moteur Stirling de type gamma
Authors: Abbas Mohamed , Said Noureddine , Boumeddane Boussad
Published: December 2023

La nécessité de réduire les émissions de dioxyde de carbone (CO2) a conduit à revaloriser les moteurs à combustion externe fonctionnant selon le cycle de Stirling. Les moteurs Stirling connaissent depuis peu une vogue nouvelle, car ils sont silencieux, non polluants, acceptent tout type de chaleur externe et demandent peu de maintenance. Ce moteur a été utilisé avec succès pour la conversion de l’énergie solaire en électricité par la technologie dite ‘Dish Stirling System’ qui utilise un moteur Stirling placé au foyer d’un concentrateur parabolique. Dans cette étude, une modélisation dynamique d’un moteur Stirling de type gamma basée une approche quasi stationnaire a été présentée. Ce modèle, qui prend en compte les différentes pertes thermiques et mécaniques dont le moteur Stirling est le siège, a conduit à l’écriture d’important système d’équation algébro différentielles. Le programme de calcul développé sous Matlab a permis, dans le but d’améliorer les performances du moteur Stirling, d’optimiser les paramètres géométriques et physiques, tels que la géométrie des échangeurs, la température du réchauffeur et du refroidisseur, les volumes morts et la vitesse de rotation.
Modélisation et simulation numérique du séchage des bois d’Ayous et d’Ebène. Validation expérimentale
Authors: Simo Tagne Merlin , Bonoma Beguide , Njomo Donatien
Published: December 2023

Dans cet article, nous développons un modèle de séchage du bois en nous inspirant de la littérature. Des hypothèses sont ensuite retenues afin de simuler le comportement des bois d’Ayous (Triplochiton scleroxylon) et d’Ebène (Diospyros crassiflora hiern). Les coefficients thermo physiques des bois sont tirés de la littérature. Les résultats de la simulation numérique montrent que le modèle peut être utilisé pour améliorer le fonctionnement des séchoirs convectifs. On constate néanmoins un léger écart entre les points expérimentaux et les résultats de la simulation numérique. Cet écart serait la conséquence des hypothèses simplificatrices adoptées, de la prise en compte dans le programme de certains coefficients thermo physiques obtenus sur des bois, autres que ceux d’étude et des erreurs enregistrées durant l’expérience ayant permis d’obtenir les cinétiques expérimentales. Le bois d’Ayous sèche plus vite que le bois d’ébène. En suivant la table de séchage du bois d’Ayous, la durée de l’opération de séchage est réduite d’environ 20 h de celle nécessaire pour mener le séchage avec une température de l’air de 40 °C. On n’observe pas de modification de la durée de séchage du bois d’Ebène, l’épaisseur des planches étant de 12 mm et la teneur en eau initiale évaluée à 35 %.
Evaluation of the biogas potential of organic waste in the northern provinces of Morocco
Authors: Afilal Mohamed Elamin , Bakx Arthur , Belakhdar Naoual , Membrez Yves
Published: December 2023

Our work focuses on the promotion and introduction of the biogas technology as innovating solution to manage organic waste and also as a clean and renewable energy. In this article we present the digestible substrate potential in the form of its biogas energy content present in the three regions along the Mediterranean coastline of Morocco, namely de regions of Oriental, Hoceima-Taza-Taounat and Tanger-Tétouan. The organic waste identified are solid manure from animal keeping, the residues of crop growing, industrial organic waste, household organic waste and slaughterhouse waste. The biomass potential from the Oriental region, including the provinces of Oujda, Berkane, Nador, Jerada and Taourirt is about 4.8 million tons a year of which the manure part represents 78 %. This biomass potential can generate theoretically 0,090 Mtep per year of energy in the form of biogas. The biomass potential from the Hoceima- Taza-Taounat region is about 7.8 million tons a year of which 75 % manure, corresponding at 0,130 Mtep of energy per year issued from the biogas produced during the digestion process. The potential in the region of Tanger-Tétouan is about 6.7 million tons a year (81 % manure) representing 0,110 Mtep of biogas energy per year.