bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH GAYA KEPEMIMPINAN DEMOKRATIS TERHADAP KINERJA KARYAWAN
Authors: Turmono
Published: May 2023

This study aims to determine the influence of democratic leadership on the employee performance of the various business projects run by Ciputra University's students from the class of 2014. This research is a quantitative research which uses random sampling as sampling technique. The research population is taken from the International Business Management (IBM) department; more specifically, IBM students from the class of 2014 who are not the CEOs of their business projects. The population criteria also exclude family businesses and any business managed by one person. The research population amounts to 167 students, from which 118 are selected as research samples. Likert-scale questionnaire is used to retrieve research data, while simple regression analysis is used to analyze the data. The F test indicates a significance value of <0.05. Likewise, the t test result is shown as <0.05. Therefore, it can be concluded that the democratic leadership style, which acts as the independent variable in this research, significantly affects the employee performance as the dependent variable.
Sistem Penjualan Sembako Toko Sarwodadi
Authors: Nugroho Fajar
Published: May 2023

The structure of data processing and information systems that are still manual at the dc Sarwodadi store make the system run ineffective, so this causes various problems. Another problem is the system of selling, purchasing, ordering goods, and stocking goods which are still difficult to organize, causing errors in counting. For this reason, a sales application system was made which aims to manage and process data stored with a database system to prevent data redundancy causing losses to the store. This research method uses the SDLC method. The SDLC method is a method with the process of system development and design to operation and maintenance. Data storage using MySQL type database. The Sarwodadi dc Store Sales Application System has data processing facilities for purchasing, selling, ordering goods, and stocking goods along with report data. So that with the new system, 83.3% of participants stated that the whole system was feasible and good to use in helping the Sarwodadi store to process data, make reports, and make it easier to get information about processed data both for the Sarwodadi store it self
Perbandingan nilai tambah dan peluang pasar gula aren dan gula semut
Authors: Imran Supriyo , Indriani Ria , Bakari Yuliana
Published: May 2023

Tujuan penelitian adalah:1) Menghitung perbandingan nilai tambah antara gula aren dan gula semut, 2) Mengidentifikasi peluang pasar dari gula aren dan gula semut. Penelitian dilaksanakan di Kabupaten Bone Bolango yang terfokus pada wilayah pengembangan usaha pengolahan aren di Kecamatan Bulango Utara dan Bulango Ulu. Penelitian dilaksanakan selama tiga bulan mulai bulan Mei – Juli 2022. . Metode penelitian menggunakan metode survey dimana wawancara dilakukan dengan menggunakan kuesioner  untuk mengumpulkan data primer yang berasal dari pengrajin gula aren dan gula semut. Pengambilan sampel dalam penelitian ini menggunakan metode Purposive Sampling  yaitu sampel penelitian adalah kelompok tani Aren yang mengolah nira menjadi  gula aren di Kecamatan Bulango Ulu khususnya Desa Mongiilo 25 orang dan 2 orang pengrajin gula semut di Kecamatan Bulango Utara, sehingga diperoleh 27 orang responden. Data yang digunakan dalam penelitian yaitu data primer dan sekunder. Analisis data menggunakan analisis deskriptif, margin pemasaran dan analisis nilai tambah Hayami.. Hasil penelitian menunjukkan dalam setiap kilogram gula semut menghasilkan nilai tambah sebesar Rp 7.978,91 atau 90,3% dari nilai produk. Hal ini menunjukkan nilai tambah nira aren menjadi gula semut lebih tinggi dibandingkan dengan gula aren dimana nilai tambah dalam setiap 1 kg produk gula aren adalah Rp 1.566,26 atau 64,63% dari nilai produk.. Namun berdasarkan dari rasio nilai tambah dari keduanya yang lebih besar dari 40 persen, menunjukkan nilai tambah gula aren maupun gula semut cukup tinggi. Peluang pasar dari gula semut lebih menjanjikan dibanding gula aren sebab harga jualnya lebih tinggi dari gula aren dimana harga gula semut sebesar Rp 35.000/kg dan gula aren sebesar Rp 15.000/kg.
Institut Teknologi Ichsan Boalemo Dengan Penekanan Fasad Pada Tampilan Bangunan
Authors: Farida Farida , Umar Umar , Antu Evi Sunarti
Published: May 2023

tujuan untuk menganalisa, merancang konsep Perencanaan Desain Kampus Institut Teknologi Ichsan Boalemo, yang berfungsi sebagai tempat pendidikan bagi masyarakat Kabupaten Boalemo khususnya di Kecamatan Tilamuta. Kurangnya Fasilitas yang mendukung dan menunjang kegiatan pendidikan serta semakin besarnya minat masyarakat untuk melanjutkan pendidikan dijenjang yang lebih tinggi yaitu perguruan tinggi yang menjadi faktor pendukung adanya kegiatan perencanaan Kampus Institut Teknologi Ichsan Boalemo di Kabupaten Boalemo. Penampilan bangunan ini dipengaruhi oleh beberapa hal yaitu analisa site yang memunculkan zooning pada site kemudian disesuaikan dengan kondisi alam sekitarnya yang akan diterapkan pada tampilan bangunan. Bentuk dasar yang ada dalam perencanaan ini banyak mengambil bentuk persegi untuk efidiensi ruang. Penerapan Konsep Fasad pada Tampilan bangunan untuk menciptakan suatu tampilan yang sesuai dengan fungsinya sebagai tempat pendidikan, sehingga akan tercipta kenyaman dan keberlanjutan suatu perencanaan desain bangunan pendidikan.
PERENCANAAN CAFE DAN RESTO TERAPUNG DI KAWASAN PULAU KONDO KABUPATEN BOMBANA DENGAN PENEKANAN STRUKTUR B-FOAM
Authors: Alifatul Fajri Andi Muhammad , Mannan Abdul , Haisah ST
Published: May 2023

Indonesia sebagai negara yang kaya memiliki sumber daya alam yang terdiri dari lautan, matahari,pantai, dan daratan yang jika dikelola dengan baik dapat memberikan manfaat yang besar bagi daratan.Semakin berkembangnya usaha cafe dan resto, Sering dikaitkan dengan meningkatkan mobilitasmasyarakat. Dalam Perencanaan Cafe dan resto ini saya menggunakan struktur terapung B-Foamsehingga tidak merusak kehidupan biota laut sehingga penekanan struktur B-Foam ini sangatmemberikan efek yang baik bagi alam. Perencanaan Cafe dan resto Terapung Di Kawasan PulauKondo Kabupaten Bombana Dengan Penekanan Struktur B-Foam. Dapat bermanfaat bagi parapengunjung dan menabah daya tarik wisatawan untuk berkunjung di pulau kondo. Perancangan cafedan resto di pulau kondo juga memiliki peran penting dalam perkembangan tingkat wisatawan dandapat meningkatkan pertumbuhan perekonomian di kabupaten bombanaStruktur terapung b-foamadalah gelondongan rakitan yang terbuat dari foam EPS yang tahan lama terhadap air dan tanpaperlunya maintenance (dengan garansi 30 tahun. untuk kapasitas kekuatan apung), mempunyai faktorapung yang terlampau safe (tidak mampu tenggelam dikarenakan tidak ada rongga di dalam modulpontoon), dan mampu mengangkut beban berat (masing-masing seberat 1,2 ton). Perencanaan tugasakhir Perencanaan Caffe dan Resto terapung di kawasan pulau kondo kabupaten bombana denganpenekanan struktur akan menjadi salah satu ikon wisata baru di kabupaten bombana denganmenggunakan struktur yang berbedda di dalam perencanannya sehingga akan menarik minat parawisatawan baik di dalam kota maupun di luar di dalam kebupaten tersebut ke wisata tersebut.
Mchango wa Mofofonolojia ya Kiduruma kwa Ujifunzaji wa Sarufi ya Kiswahili
Authors: Munda Majele Noah , Wamalwa Eric W. , Sululu Simiyu Benson
Published: May 2023

Makala haya yamedadavua mchango wa mofofonolojia ya Kiduruma kwa ujifunzaji wa sarufi ya Kiswahili katika shule za msingi za kaunti ya Kwale nchini Kenya. Nadharia ya Fonolojia Zalishi Asilia iliyoasisiwa na Joan Hooper (1971) iliongoza utafiti. Mkabala wa kithamano na muundo wa kiethinografia ulitumiwa katika uchunguzi. Data ilikusanywa kutokana na insha za wanafunzi kwa kutumia mwongozo wa uchanganuzi wa yaliyomo. Matokeo yalionesha kuwa kuna mwingiliano katika vipengele vya mofofonolojia ya Kiduruma na Kiswahili, hali inayoleta uwezekano wa kuendeleza ujifunzaji wa vipengele vya sarufi ya Kiswahili kwa kutumia mofofonolojia ya Kiduruma. Imebainika kwamba ujifunzaji wa vipengele vya sarufi ya Kiswahili kama vile fonimu, miundo ya silabi, ngeli, nyakati mbalimbali na mnyambuliko wa maneno unaweza kufaidi kutokana na mofofonolojia ya Kiduruma. Kutokana na matokeo hayo, uchunguzi huu unapendekeza kwamba, katika eneo la utafiti ambapo asilimia kubwa ya wanafunzi ni Waduruma, mofofonolojia ya Kiduruma inaweza kutumiwa kama wenzo wa ujifunzaji wa vipengele vya sarufi ya Kiswahili.
Pelatihan Pembuatan Nata Belimbing sebagai Upaya Pemberdayaan Masyarakat Kelurahan Karangsari Kota Blitar Menuju Desa Mandiri Pangan
Authors: Malahayati Eva Nurul , Sholihah Mar'atus , Shoolikhah Luthfiya Aqidatu , Amin Sholicatul
Published: May 2023

Karangsari is the largest producer of Karangsari starfruit varieties in Blitar City. To support community food security as well as to preserve the Karangsari star fruit variety and promote the economy of the community in Karangsari village, most of the people's yards are used as star fruit orchards. Karangsari star fruit harvest is usually sold in the form of fresh fruit. This fresh fruit does not have a long shelf life. During the harvest season, star fruit prices tend to be low. Overripe fruit, defects due to insect bites, and those that do not match the sales size grade are usually just thrown away and not used. As a result, the income of farmers has decreased. The target focus of this community service activity partner is the UMK community group in the Karangsari village. The priority problem from partners is the lack of partner skills in processing star fruit, especially those that do not sell due to overripe or slightly defective (damaged) and do not match the sales size grade. This activity aims to improve the skills of partners in making nata de Averrhoa carambola as a processed product of Karangsari starfruit which can be used as the flagship product of MSEs in Karangsari. In this activity there are several methods carried out, namely (a) providing material on the technique of making nata de Averrhoa carambola, (b) training in making nata de Averrhoa carambola, and (c) assistance in processing nata de Averrhoa carambola so that it becomes ready-to-eat food or drink. for consumption and sale. Through this training activity, the Karangsari UMK group has the understanding and skills in processing starfruit into nata. In addition, the MSE group is motivated to develop superior products from star fruit nata. However, the packaging and labeling of processed nata products is still less attractive to consumers. Therefore, it is necessary to continue with special training related to packaging and labeling of processed nata products that are more attractive and have a selling value.
Pengembangan Literasi Menulis Siswa MIS Darul Ulum Genengan: Pelatihan Penulisan Kalimat Efektif dan Penggunaan Tanda Baca
Authors: Fauzi Adin , Baihaqi M Iqbal , Yuliani Sinta
Published: May 2023

This community service aims to develop students' writing literacy in the form of training. The main focus of this community service is to train students to write effective sentences and apply punctuations. This training involved 15 grade VI students of MIS Darul Ulum Genengan who had taken the Minimum Competency Assessment (AKM). They were selected as training participants to follow up on the results of the AKM. The training was held for 6 meetings in the period from August 1–31, 2022. The training activities include: pretest (writing text); vocabulary identification; sentence analysis; punctuation analysis; vocabulary, sentence, and punctuation exercises; and posttest (writing text). These activities were carried out in groups and individually by applying attractive learning strategies and media. After participating in the training, 80% of students were able to reach a proficient level in writing. This result far exceeds the pre-training achievement; that is, 73% of students were only able to reach the basic level. With these results, it is highly recommended for the school to intensify literacy activities, especially writing. Those who are talented can continue to hone their skills, and those who still need special intervention can continue to develop their abilities.
Developing Marketplace-Based Online Store as an Adaptation to Online Purchase Trends
Authors: Fitriani Sabrina , Valentika Nina
Published: May 2023

The presence of the Covid-19 pandemic is the main cause of the online buying trend. This is because the whole world is imposing social restrictions simultaneously, thus encouraging the birth of consumption pattern adaptations, with the digital purchasing model. These conditions require business actors to develop digital business concepts or e-commerce. One of the digital sales models is to build a marketplace-based online store. This research was conducted aiming to analyze the effectiveness of the influence of marketplace-based digital shops on purchase intention mediated by trust. To answer this goal, a quantitative study was carried out using the structural equation analysis method. The number of respondents is set at 200 people from millennial workers. Research data was collected primary by distributing questionnaires. The results of the study explain that there has been a change in purchasing patterns, from direct purchases to online purchases. Then, consumers feel that online purchases provide more guarantees of trust in service, price and satisfaction. So consumers assess, there is no doubt to make buying and selling transactions online.
Employee Performance Reform Based on Integrity, Organizational Support and Team Work
Authors: Sulaiman Sai
Published: May 2023

The many irregularities in work behavior and the unprofessional civil servants have become the trigger for performance reform in government agencies. This is because the public is furious about the behavior of government employees who are considered arrogant and like to take bribes. Finally, in this digital era, many people publish the poor performance of civil servants on social media, thereby forcing the authorities to reform the performance of their employees. This research was conducted as an effort to look at improving the quality of performance of civil servants based on the values ​​of integrity, organizational support and work teams. To test this objective, a data-based quantitative approach is used. As many as 100 employees of the East Nusa Tenggara provincial religious court were questioned as correspondents. In disclosing this information, an analytical method based on structural equations is used. The results of the study reveal that changing old work patterns is not easy, but efforts to improve and improve must be made, one of which is by instilling the values ​​of integrity, providing large compensation and building a productive work environment. Statistically, there is a trend of improving the quality of employee work when integrity values ​​are implemented in carrying out tasks. In addition, a large compensation system can raise morale, resulting in pleasant and friendly work behavior. Meanwhile, a healthy work environment can affect the psychology of employees to be able to provide the best for their co-workers.
Thermic Effect of Low-Calorie Carbohydrate Intake on Resting Energy Expenditure
Authors:   Institute of Physiology of Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, Bushmanova Ekaterina A. , Loginova Tat’yana P. , Lyudinina Aleksandra Yu. ,   Pitirim Sorokin Syktyvkar State University
Published: May 2023

Basal metabolic rate (BMR) differs from resting energy expenditure (REE) by less than 10 %, the latter being measured under similar conditions, but after a low-calorie meal. Presently, the two terms are used interchangeably, although resting energy expenditure is the preferred one. However, the cycling to exhaustion test commonly used in assessing the physical performance of elite athletes should not follow a 12-hour fasting. Consequently, the subjects are given a standardized low-calorie highcarbohydrate breakfast before the test, which, according to the authors, does not distort the obtained REE values. Therefore, the aim of this study was to determine the thermic effect of a standardized high-carbohydrate meal on resting energy expenditure and body composition. Materials and methods. The anthropometry and body composition were analysed in healthy young men (n = 10) using the ACCUNIQ BC380 system; REE was assessed using indirect calorimetry; the thermic effect of a low-calorie high-carbohydrate breakfast was calculated as a difference between fasting REE and postprandial metabolism. Results. The research showed that a high-carbohydrate (91 %) food intake (250–300 kcal) produces no significant effect on REE. The meal’s thermic effect was 36.0 ± 5.7 kcal, which increased REE (1887.2 ± 111.7 kcal) by 2 % compared to baseline BMR (1851.2 ± 106.0 kcal). In the subjects, REE varied depending on the total amount of water in the body (p = 0.038), fat mass (p = 0.021), and an energy substrate (carbohydrate) intake (р = 0.046). Thus, in people, including athletes, it is acceptable to measure REE after a high-carbohydrate breakfast that does not exceed 300 kcal.
Pelješac bridge, Croatia – Part 2: Construction and Assembly/Pelješac-Brücke, Kroatien – Teil 2: Ausführung und Montage
Authors: Pipenbaher Marjan
Published: May 2023

The 2 404 m long Pelješac Bridge, Croatia ranks among the most demanding bridges in the Europe in terms of both the technological complexity of construction and the complexity of the design. The bridge is designed as a multi-span cable-stayed bridge with a semi-integral hybrid structure. While Part 1 (Bauingenieur 5/2023) dealt with the concept and planning of the bridge, the construction and assembly is reported now.
FAKTOR YANG BERHUBUNGAN DENGAN KEJADIAN ANEMIA PADA SANTRIWATI DI KOTA BEKASI
Authors: Manikam Ratna Mutu , Angesti Annisa Nursita , Mardiyah Sarah
Published: May 2023

Anemia termasuk ke dalam masalah kesehatan dunia terutama pada negara berkembang, yaitu Indonesia. Risiko anemia banyak dialami pada siklus kehidupan ibu hamil dan remaja. Prevalensi anemia di Indonesia pada perempuan naik dari tahun 2013 – 2018, termasuk pada usia produktif yaitu 15-49 tahun. Tujuan : untuk mengetahui faktor-faktor yang berhubungan dengan kejadian anemia pada santriwati di Pondok Pesantren Tahfidz Fathul Baari Kota Bekasi. Bahan dan metode : desain penelitian yang digunakan adalah cross sectional dengan teknik pengambilan sampel yaitu total sampling dengan jumlah 40 responden. Penelitian dilaksanakan di Pondok Pesantren Tahfidz Fathul Baari Kota Bekasi. Hasil penelitian: tidak ada hubungan antara pendidikan ayah dan ibu, asupan protein, vitamin C, zat besi, konsumsi TTD, status gizi, pengetahuan anemia, dan lama menstruasi dengan kejadian anemia (p 0,05). Kesimpulan: secara statistik tidak ada hubungan yang bermakna antara pendidikan ayah dan ibu, asupan protein, vitamin C, zat besi, konsumsi TTD, status gizi, pengetahuan anemia, dan lama menstruasi dengan kejadian anemia. Untuk santriwati diharapkan dapat memperdalam pengetahuan tentang anemia dan menambah variasi menu makanan terutama lauk hewani dan nabati, serta menambah jumlah porsi makan agar kecukupan protein dan zat besi terpenuhi agar terhindar dari risiko gejala anemia.
The Impact of Youtube on Iraqi EFL Learners’ Academic Achievements at Sawa Private University: A Critical Essay
Authors: Al Khanaifsawy Abdullah Najim Abd
Published: May 2023

The present essay aims at investigating the effects of the educational videos on the college students’ academic achievements. The present paper came after checking the students’ responses to the lecture’s questions submitted by the instructor to the students to see how far the students go with their responses following their tracking YouTube videos. The present essay was based on the quantitative method and data had been collected through a sample survey. The study has revealed that that watching educational videos affected the academic activities and performance of the respondents positively. It also has confirmed that most of the students preferred short animated to summarize the lectures that they were requested to be presented in the upcoming lecture.
Social Communication in Conceptual Works of Contemporary Ceramics
Authors: Obaid Saad Hafid
Published: May 2023

Contemporary ceramic art and intellectual trends, where the ceramic form became interactive from society and mixed with the environment, and in conceptual art, the concept or meaning behind his work is more than his aesthetic function, this study forms four chapters. Its first chapter is concerned with the problem related to the research, its importance and limitations, and it defines the terms used. As for its second chapter, it is related to the framework of theoretical research and previous studies, and the concept of social communication is dealt with in its first axis, while its second axis deals with postmodern ceramics. In the third chapter, the procedures that were taken to implement the research are explained, where the research category of (15) potters was formed, the study sample and the tools used, the descriptive analytical approach was determined, and an analysis was conducted on a sample of the research consisting of (3) ceramic samples. As for its fourth chapter, it includes a review of the results, recommendations and conclusions.
Entrepreneurship Creativity in Light of the Digitization of Mental Abilities According to the Hermann Scale": An Applied Study in the Presidency of Al-Mustansiriya University
Authors: Yousif Abdulrahman Dr. Fouad , Al-Rubaye Dr. Sumaya Abbas Majeed , Ahmed Kurji Dr. Sahar
Published: May 2023

This study was based on the idea that the study of mental abilities and the possibility of digitizing them and determining their trends according to the Hermann scale, in which he identified specific functions of the four brain departments (objective - executive - emotional - creative) an effective and important role in the advancement of the components of entrepreneurial creativity in the research organization. Where the researchers adopted the descriptive, analytical and statistical approach in dealing with variables based on measures consistent with the objectives and nature of the environment under study. He expressed the problem of the study with a set of questions of a theoretical and practical nature, which were formulated in the hypothetical scheme of the study and resulted in a set of hypotheses. The study was applied in a community represented by the departments of the Presidency of Al-Mustansiriya University and a sample of (30) individuals. The data were collected through a questionnaire that included (40) questions that dealt with the dimensions of the study and were processed using measures of central tendency and statistical methods when using the electronic calculator within the program (SPSS ver-10). The researchers reached a set of conclusions, the most important of which is the existence of a significant effect of the independent variable, the digitization of mental abilities with its dimensions determined by the Hermann Scale in Entrepreneurial Creativity, according to which the hypothesis was accepted.
Caracterización de la calidad de vida laboral docente en una universidad privada: Estudio de casos
Authors: Sanchez Soto. Juan Manuel
Published: May 2023

Caracterización de la calidad de vida laboral docente en una universidad privada: Estudio de casos
Theoretical and Experimental Investigation of Transformer Winding Fault Detection Using Comparison of Transfer Function Coefficients
Authors: Bigdeli Mehdi , Vakilian Mehdi , Rahimpour Ebrahim , Azizian Davood
Published: May 2023

In this work, a new model of transformer winding is developed. The components in the model are determined by the geometric and electric data of the winding (detailed model) and using experimental data based on genetic algorithm. Under different degrees of axial displacement and radial deformation in the winding, the circuit parameters of the model will change and thus the equivalent circuit characteristics will be influenced. After acquiring the model parameters in the intact and faulted cases, transfer function coefficients are derived in model using nodal analysis. Subsequently, introducing a new index based on these coefficients, the type and extent of penetration of the fault in the winding can be specified. Results presented in this work demonstrate the potential of the proposed method.
Newton-Raphson Power-Flow Analysis Including Induction Motor Loads
Authors: Aree Pichai
Published: May 2023

This paper presents an extended method of Newton-Raphson power flow algorithm to incorporate nonlinear model of induction motor loads. The proposed method is used for finding correct power system operating conditions, which can be employed for solving the problem of initializing the dynamic models of induction motor for stability studies. The power flow solution with a group of induction motor loads is demonstrated through 14buses industrial power system. Moreover, the computational efficiency of the extended algorithm has been investigated using IEEE-30buses network. The results show that this algorithm gives an exact solution of motor’s active and reactive powers that are related with converged slips, terminal voltages, and mechanical torque profiles. Furthermore, the extended algorithm shows a good convergent characteristic in quadratic manner.
Integrated D-STATCOM with Supercapacitor Used in IEEE Industrial Distribution System
Authors: Nazarloo Amin , Hosseini Seyed Hossein , Babaei Ebrahim , Sharian Mohammad Bagher Bannae
Published: May 2023

In this paper, a new control method for DSTATCOM (Distribution STATIC Compensator) applied in IEEE 13-bus industrial distribution system is proposed. The operation of this control method enables D-STATCOM to mitigate every type of voltage distortions caused by Single Line to Ground (SLG), Double Lines to Ground (DLG) and Three Lines to Ground (TLG) faults. This new method is based on two factors; firstly, integrating D-STATCOM and supercapacitor energy storage system and secondly, using of feedback in controller system and determining proportional gain of Proportional-Integral (PI) controller, intelligently. In addition, the 12-pulse DSTATCOM configuration with IGBT is designed and the graphic based models of the D-STATCOM are developed using the PSCAD/EMTDC electromagnetic transient simulation program. As a case study, a 13- bus IEEE industrial distribution system is simulated to verify operation of proposed D-STATCOM.
A Study of Cogging Torque Reduction Methods in Brushless DC Motor
Authors: Srisiriwanna Teeradej , Konghirun Mongkol
Published: May 2023

The cogging torque is undesirable effect in the brushless dc (BLDC) motor, causing vibration and audible noises. It arises from the rotor permanent magnet interacting with the steel teeth on the stator. This paper studies the various reduction methods of cogging torque when designing a BLDC motor. These methods can be categorized according to three parts of motor structure, i.e., air gap length, rotor and stator parts. The finite element method magnetic (FEMM) is primarily used to analyze the cogging torque among these different reduction methods. In this paper, a 4-pole, 24-slot BLDC motor is focused with variations of air gap length, rotor, and stator parts in order to study its cogging torque reductions. Finally, the FEMM simulation results are presented to validate these reduction methods.
Comparison between Fuzzy Sliding Mode and Traditional IP Controllers in a Speed Control of a Doubly Fed Induction Motor
Authors: Bekakra Youcef , Attous Djillani Ben
Published: May 2023

Many industrial applications require new control techniques in order to obtain fast response and to improve the dynamic performances. One of the techniques users, fuzzy sliding mode control which is characterizes by robustness and insensitivity to the parameters variation. In this paper, we present a comparative study of a direct stator flux orientation control of doubly fed induction motor by two regulators: traditional IP controller and fuzzy sliding mode. The three regulators are applies in speed regulation of doubly fed induction motor (DFIM). The robustness between these two regulators was tested and validated under simulations with the presence of variations of the parameters of the motor, in particular the face of disturbances of load torque. The results show that the fuzzy sliding mode controller has best performance than the traditional IP controller.
Doubly-Fed Induction Generator Wind Turbine Model for Fault Ride-Through Investigation
Authors: Chongjarearn Yutana
Published: May 2023

The paper presents an investigation into the behavior of a grid-connected, wind turbine driven Doubly-Fed Induction Generator (DFIG) during Grid faults which are represented by a voltage dip on all three phases of the voltage supply. Stator-voltage- oriented vector control is used to decouple the active and reactive power generated by the machine. The dynamic DFIG model is used to simulate the behaviour of the wind turbine generator during both normal and fault conditions. Simulation and experiment results are shown in a very good agreement. Further the model can be used to investigate Fault ride-through performance of the DFIG.
Novel Circuit Breaker Modeling in 275kV Substation
Authors: Radmanesh Hamid , Atani Razieh Salimi
Published: May 2023

Ferroresonance an electrical phenomenon may cause overvoltages in the electrical power system. In this paper, an overview of available papers is provided, at rst ferroresonance is introduced and then various type of ferroresonance in a voltage transformer (VT) is simulated. Then eect of new model of circuit breaker (CB) on damping ferroresonance oscillation is examined. Finally eect of earth resistance on the stabilizing these oscillations in the case of nonlinear core loss has been studied. Core loss is modelled by third order power series in terms of voltage and includes nonlinearities in core loss. For conrmation, the simulation is done on a one phase voltage transformer rated 100VA, 275kV. The simulation results reveal that novel modeling of circuit breaker exhibits  great controlling eect on ferrores- onance overvoltages.
Performance Enhancement of PMSG Systems with Control of Generator-side Converter Using d-axis Stator Current Controller
Authors: Bunjongjit Kitsanu , Kumsuwan Yuttana
Published: May 2023

This paper presents a performance enhancement of a permanent magnet synchronous generator (PMSG) system with control of generator-side converter for a wind turbine application. This method uses zero d- axis stator current control to minimize winding losses of the generator. The electromagnetic torque of the generator is correlated with the magnitude of the qaxis stator current, while the daxis stator current is regulated at zero, the control scheme decouples the dq-axis stator current control through a vector con- trol for the generator-side converter. This paper also presents mathematical analysis of the active power and stator power factor, and the maximum power point tracking (MPPT) operation. Simulation re- sults are provided to guarantee the proposed control scheme, in which the performance enhancement and eciency are evaluated.
Dependable Capacity Evaluation of Wind Power and Solar Power Generation Systems
Authors: Naksrisuk Chatbordin , Audomvongseree Kulyos
Published: May 2023

Integration of renewable energy sources, such as wind power and solar power, into the generation system can enhance country's energy security. These alternative energy help diversify sources of primary energy used to produce electricity. However, the biggest disadvantage of using these types of renewable energy power plants is that it might reduce power system reliability because these intermittent renewable energy sources have low dependable capacity. This paper aims to evaluate the dependable capacity of wind power and solar power generation systems. It considers uncertainties due to intermittent wind speed, solar irradiance, ambient temperature, and unavailability of their corresponding generators. Additionally, load uncertainty is also taken into account. The dependable capacity of the wind power and solar power generation systems are determined from the principle of generation system reliability evaluation. The reliability index such as Loss of Load Probability (LOLP) will be used as a key indicator to dene the dependable capacity
Bat Optimization for a Dual-Source Energy Management in an Electric Vehicle Energy Storage Strategy
Authors: Allaoua Boumediène , Laoufi Abdellah , Laoufi Abdellah , Mebarki Brahim
Published: May 2023

This paper presents a new strategy of dual source management using Bat-optimization for an electric vehicle energy storage strategy. The power distribution between fuel cell and super-capacitor modules for obtain a good performance is an essential problem in dual-source electric vehicles. Traditional numerical optimization for energy management relies too much on the expert experience, and it's easy to get the sub-optimal performance. In order to overcome this drawback, a new intelligent method metaheuristic of Bat optimization is introduced for energy management in dual-source propelled electric vehicle. This work, based on the systemic power analysis in the energy storage strategy, the vehicle power propulsion system encounters and the constraints the energy storage strategy should obey. Then, dierent operation modes of dual-source systemic power analysis in energy storage strategy are presented. Finally, the results show the validity of the proposed technique.
Integrated Magnetic Circuits for Differential-mode and Common-mode Chokes of EMI Filters
Authors: Tarateeraseth Vuttipon
Published: May 2023

In this paper, two magnetic circuits to integrate common-mode (CM) and differential-mode (DM) chokes of an electromagnetic interference (EMI) filter are proposed. The DM and CM chokes are integrated by using UIU and EI ferrite core shapes. To evaluate the EMI reduction performances of proposed approaches, the conducted EMI reduction performances of proposed integrated DM and CM chokes are compared with the conventional CM choke and traditional separated DM and CM chokes. From the experimental results, it ensures the advantages of the use of proposed approaches. Although some magnetic parts are eliminated by proposed approaches, the amount of DM and CM EMI attenuation rate is comparable to the case of traditional separated DM and CM chokes, except the highest peak is located at different frequencies.
Robust Digital Control for Interleaved PFC Boost Converters Using an Approximate 2DOF Current Controller
Authors: Adachi Yuto , Sato Tomoaki , Chamnongthai Kosin
Published: May 2023

In recent years, improving power factor and reducing harmonics distortion of power supply used in electrical instruments are needed. In general, a current conduction mode boost converter is used for an active PFC (Power Factor Correction). Especially, an interleaved PFC boost converter is used to make a size compact, make an efficiency high and make a noise low. In this paper, the design method using an Approximate 2-degree-of-freedom (A2DOF) controller for a current control system and using a digital PI controller for a voltage control system is proposed. The digital PI controller is designed to enlarge the control bandwidth of the voltage control system. By this design method, the power factor can be improved more, the input current distortion can be made smaller and the output voltage regulation can also be suppressed smaller. These controllers are actually implemented on a micro- processor and are connected to the PFC converter. Experimental studies demonstrate that the combination of the digital A2DOF current controller and the digital PI voltage controller are effective. And it is shown that this combination is better than the one of usual phase lead-lag compensation controllers in the power factor, the input current distortion and the output voltage regulation.
Factorial Hidden Markov Model analysis of Random Telegraph Noise in Resistive Random Access Memories
Authors: Puglisi Francesco Maria , Pavan Paolo
Published: May 2023

This paper presents a new technique to analyze the characteristics of multi-level random telegraph noise (RTN). RTN is defined as an abrupt switching of either the current or the voltage between discrete values as a result of trapping/de-trapping activity. RTN signal properties are deduced exploiting a factorial hidden Markov model (FHMM). The proposed method considers the measured multi-level RTN as a superposition of many two-levels RTNs, each represented by a Markov chain and associated to a single trap, and it is used to retrieve the statistical properties of each chain. These properties (i.e. dwell times and amplitude) are directly related to physical properties of each trap.
Improving The Lightning Performance of Overhead Distribution and Sub-transmission Lines Applying Additional Underbuilt Shield Wire
Authors: Thanasaksiri Thanaphong
Published: May 2023

This paper analyzes the lightning performance of 22 kV single and double circuit overhead distribution lines and 115 kV sub-transmission line with 22 kV circuit underbuilt by means of installation the additional underbuilt shield wire. The three different shield wire sizes of 25, 35 and 50 mm2 and the placement locations from ground which is taken into account the clearances from the phase conductors and ground have been considered. Evaluating were performed using ATPDraw and calculations by applying the equations from IEEE std. 1243-1997 and 1410-2010 to determine the best placement location and size. For the systems being studied, both for overhead distribution and sub-transmission lines, the additional underbuilt shield wire can be used to gain better lightning performance besides the overhead shield wire.
Electric Impedance of Piezoelectric Ceramics under Acoustic Loads
Authors: J. Arnold Francisco , Gonçalves Marcos S. , Bravo Roger Leonardo L. , Mühlen Sérgio S.
Published: May 2023

The electric impedance of piezoelectric ceramics is influenced by variations in the acoustic load. This situation is very common for ultrasonic applications in medicine where the irradiated media can present different interfaces and impedances to the propagating acoustic energy. In this work we analyzed the behavior of the resonances, anti-resonances and the effective electromechanical coupling factor of a piezoelectric ceramic ring vibrating in thickness mode. The analysis is based on equivalent electric circuits and considers variations in the acoustic load. The results showed that the electric impedance of the ceramic is altered with the length of the acoustic load, resulting in new resonances and changing the effective electromechanical coupling factor. Electronic circuits for driving piezoelectric transducers must be able to correct the frequencies if acoustic loads vary.
The Optimum Number of Nodes and Radius for Distributed Beamforming Networks
Authors: Sriploy Pongnarin , Uthansakul Peerapong , Uthansakul Monthippa
Published: May 2023

This paper presents a ready-made formula to calculate the number of node and network radius for distributed beamforming networks. The calculation is based on guarantee of received signal at destination to be higher than received sensitivity. The proposed calculation model already includes path loss and also imperfection in node location estimation, which can be applied for both indoor and outdoor scenarios.
2D Interleaver Design for Image Transmission over Severe Burst-Error Environment
Authors: Hanpinitsak P. , Charoenlarpnopparut C. , Suksompong P.
Published: May 2023

This paper proposes to further design the sub-optimal two-dimensional (2D) interleavers while taking the best interleaver from the previous work into consideration. The newly proposed interleavers are 2D Golden interleavers (Gold), uniformly distributed interleavers (Uniform) and Block and bit wise interleavers (Block & bit). The performances of these interleavers were compared and evaluated by comparing the average (Mean) and standard deviation (SD) of the bit error rate (BER) under the environments with different amounts of burst errors. Moreover, the average computation time (Time) of the interleaver and average distance between adjacent bits after deinterleaving (Dist) were also utilized as the criteria for performance evaluation. Time could also be used to analyze the computational complexity of the interleavers where Time of the proposed 2D interleaver was compared with Time of original 1D block interleaver to test the suitability for hardware accomplishment. The transmission scheme for 2D system is based on previously proposed 2D linear block code and 2D syndrome decoder. The performances of these 2D interleavers were compared with traditional one-dimensional (1D) interleavers with comparably the same complexity. The buffer sizes for 2D channel that were considered in this paper are 256*256, 128*128, 64*64, 32*32 and 16*16 which is equivalent to 65536, 16384, 4096, 1024 and 256 buffer sizes for 1D respectively as they have the same number of elements. Simulation results suggest that 2D interleavers have relatively lower computation time than their 1D equivalent interleavers and reducing the buffer size can dramatically increase the BER. The optimal buffer sizes for 2D interleavers are 256*256 and 128*128. For low error rate error, the best interleaver would be Uniform and Gold for 256*256 and 128*128 buffer size respectively. For the other environment, the finest ones are Block&bit and Uniform for 256*256 and 128*128 buffer size respectively. Comparison results between the computation time of the proposed 2D interleavers and 1D block interleaver also indicate that 2D interleavers are suitable for hardware implementation since they have less computational complexity.
Leakage Inductance Calculations in Different Geometries of Traction Transformers
Authors: Azizian Davood , Bigdeli Mehdi
Published: May 2023

Calculating leakage inductances between windings of traction transformer is one of the most important schemes in design procedure. In this paper, analytic, semi-analytic and finite element methods are introduced for electromagnetic modeling of different geometries of the traction transformer. Using these methods, the leakage inductances between windings are calculated and the methods have been validated with the help of a traditional analytic method and experimental data gathered from a typical 4000kVA dry-type transformer. The analytic method which usually used for electromagnetic modeling of transformers with concentric windings, assumes the windings to be constructed of straight wires. This method is fast and suitable for calculating the axial magnetic field and leakage inductance between concentric windings. However, in order to increase the accuracy of leakage inductance calculations between pancake windings, a semi-analytic method is proposed. It is shown that this semi-analytic method has a better accuracy in comparison with the analytic method and despite of the longer computing time, it is still a faster method compared to finite element.
Review of Discrete Fourier Transform During Dynamic Phasor Estimation and the Design of Synchrophasor Units
Authors: Chukkaluru Sai Lakshmi , Affijulla Shaik
Published: May 2023

In a large and complex interconnected power system, the measurement of synchronized bus voltage and line current plays a vital role in the monitoring and precise control of various sophisticated electrical equipment for secure and reliable operation. Phasor measurement units (PMUs) are incorporated into a wide area of the power system to extract the different signals of synchronized phasors. In this paper, the capacity of the PMU phasor estimation algorithm is explored based on discrete Fourier transform (DFT) under different sampling frequency rates during various dynamic scenarios in accordance with the IEEE C37.118.1a-2014 standard. Furthermore, the performance of the DFT algorithm varies according to the phase angle and dynamic parameters such as frequency, frequency ramp rates, modulation frequency, harmonic levels, step change, decaying dc, and noise levels. The simulation results reveal that accuracy of the phasor estimation algorithm based on DFT can be achieved at high sampling frequency rates. Furthermore, the results of DFT-based phasor estimation are compared with Shank’s estimation method (SEM) and the least-squares estimation method (LEM). The presented method is best suited to PMU algorithms development based on DFT for better visualization of the smart electric grid.
Field Programmable Gate Array-Based Execution on a Distributed Energy Resource Supported Electrical Distribution System for Enhanced Power Quality with Optimal Active Power Flow Control
Authors: Sabat Jogeswara , Mangaraj Mrutyunjaya
Published: May 2023

This paper explains the experimental study of a distributed energy resource (DER) integrated three-phase, three-wire electrical distribution system (EDS) under power quality (PQ) and optimal active power flow control (OAPFC). In this research, a back-to-back connected two-level VSI (BTB-TVSI) based distribution static compensator (DSTATCOM) for unbalanced non-linear load is designed. The aim is to provide better OAPFC in EDS with shunt compensation to maintain a round-the-clock quality power supply for end users. The improved neural network-based adaptive least mean square (ALMS) control algorithms are employed for DSTATCOM. The ALMS control strategy is realized using the SPARTAN-6 field programmable gate array (FPGA) evaluation kit. This research involves the comparative study of a two-level voltage source inverter (VSI) and a BTB-TVSI in terms of their OAPFC capability and robustness in mitigating power quality (PQ) against source current disturbances, low power factor (PF), poor voltage regulation, unbalanced voltage at the point of common coupling (PCC), high switching stress, and issues in the EDS operation. The experimental results demonstrate that the BTB-TVSI using an ALMS controller is able to achieve better dynamic performance and lower total harmonic distortion (THD) under selected/permissible limits in comparison to a conventional VSI.
Performance Comparison Analysis of a High Voltage DC LLC Resonant Converter for Telecom and Datacenter Applications
Authors: Darla Ramesh B. , Chitra A.
Published: May 2023

Intermediate Bus Architecture (IBA) is used for power distribution in information communication technology (ICT) equipment due to the flexibility of its power distribution and cost-effectiveness compared to centralized or DC-mediated power. The reason for IBA's good performance in this context is its greater reliability and efficient Intermediate Bus Converter (IBC). Existing IBAs comprise low-voltage systems with multiple power, resulting in power loss. This study outlines the need for a high-voltage DC-to-DC converter to solve the problems associated with conventional 48 VDC converters. A 300 W LLC series resonant converter is utilized for the design and analysis of converter efficiency and losses across various input voltages. The results indicate that the maximum converter efficiency is >92% at full load. MATHCAD is used to analyze the performance of the LLC converter and understand the suitable operating zones for zero-voltage-switching. The LLC converter's efficiency is investigated for multiple input voltage ranges. The LLC converter is designed and developed in MATLAB and the results of the simulation are presented. Trade-offs in the LLC converter's design are also discussed, with the goal of operating the converter in an optimal manner and achieving the maximum possible efficiency.