bluuebunny/crossref_metadata_2025 huggingface dataset:
In silico analysis of correlation between physicochemical properties of ligands and binding affinity to protein targets
Authors: Hossain Md. Aktar , Sultana Saima
Published: August 2023

In silico analysis is a powerful technique to identify better therapeutic interventions. Molecular docking is widely used to screen ligands through analysing binding affinities for target receptors. In this study we screened ligands for two proteins which are potential drug targets: deoxyuridine triphosphate nucleotidohydrolase (dUTPase) and 6- phosphoglucolactonase (6PGL). The enzyme dUTPase plays crucial roles in DNA replication and repair and has been implicated in a number of cancers in humans and the protein 6PGL is involved in the pentose phosphate pathway. We used 500 compounds from the dictionary of marine natural products to make the ligand library. The MarvinSketch was used for generating ligand structures. For virtual screening we used the PyRx software which utilizes Autodock vina for molecular docking. Ligand- receptor interactions were visualized using the BIOVIA Discovery Studio Visualizer software. From 500 compounds, 355 ligands followed the Lipinski rule of five. For dUTpase, ligand243 showed the highest binding affinity (-18.2 Kcal/mole). Interestingly, the same ligand exhibited the highest binding affinity (-17.5 Kcal/mole) for 6-PGL. We couldn’t find any significant correlation between binding affinities and physicochemical properties of the ligands. The dUTpase protein has been implicated in cancer pathophysiologies and the 6PGL has been identified as targets for treating sleeping sickness and malarial infections. We found that the ligand243 can bind to both of these drug targets with high affinities. Thus, this ligand can further be developed as a candidate drug for cancer, sleeping sickness and malarial infections.
Deciphering the selectivity of CBL-B inhibitors using all-atom molecular dynamics and machine learning
Authors: Zhou Feng , Du Haolin , Fu Weiqiang , Wang Yang , zhang yingsheng
Published: August 2023

We employ a combination of accelerated molecular dynamics and machine learning techniques to unravel the dynamic characteristics of CBL-B and C-CBL, and how their configurational changes conferring the binding affinity and selectivity of their ligands. We demonstrate that the activity and selectivity against CBL-B and C stem from subtle structural disparities within their binding pockets, and dissociation pathways. Our predictive model for dissociation rate constants (koff) demonstrates a moderate correlation with experimental IC50 values, effectively aligning with two available experimental koff values. Moreover, the binding free energies calculated using MM/GBSA highlight the ΔG distinction between CBL-B and C-CBL. By employing a regression strategy on dissociation trajectories, we identified key amino acids in binding pocket and along the dissociation path responsible for activity and selectivity. These amino acids are statistically significant in achieving activity and selectivity and correspond to the primary structural discrepancies between CBL-B and C-CBL. Through microsecond-scale replica exchange molecular dynamics coupled with generative model of molecular generation and ensemble docking, we accomplish comprehensive simulations of the complete apo-holo-apo transformation cycle. This approach provides an enabling first-in-class drug design technology based on apo-to-holo structure transformation.
Enhancing Robustness of Adhesive Hydrogels Through PEG-NHS Incorporation
Authors: Uslu Ece , Rana Vijay , Guo Yanheng , Stampoultzis Theofanis , Gorostidi François , Sandu Kishore , Pioletti Dominique
Published: August 2023

Tissue wounds are a significant challenge for healthcare system, affecting millions globally. Current methods like suturing and stapling have limitations such as inadequate wound coverage, fail to prevent fluid leakage, and increasing the risk of infection. Effective solutions for diverse wound conditions are still lacking. Adhesive hydrogels, on the other hand, can be a potential alternative for the wound care. They offer benefits such as firm sealing without leakage, easy and rapid application, and the provision of mechanical support and flexibility. However, their in vivo durability is often compromised by excessive swelling and unforeseen degradation, which presents a challenge for widespread use. In this study, we addressed the durability issues of the adhesive hydrogels by incorporating Acrylamide Polyethylene glycol N-hydroxysuccinimide (PEG-NHS) moieties (max 2 wt%) into hydrogels based on hydroxy ethyl acrylamide (HEAam). The results showed that the addition of PEG-NHS significantly enhanced the adhesion performance, achieving up to 2-fold improvement on various soft tissues including skin, trachea, heart, lung, liver, and kidney. We further observed that the addition of PEG-NHS into adhesive hydrogel network improved their intrinsic mechanical properties. The tensile modulus of these hydrogels increased up to 5-fold, while the swelling ratio decreased up to 2-fold in various media. These hydrogels also exhibited improved durability under the enzymatic and oxidative biodegradation induced conditions without causing any toxicity to the cells. For a clinical point of view, we found that PEG-NHS-based hydrogels effectively addressed tracheomalacia, a condition characterized by inadequate mechanical support of the airway due to weak/malacic cartilage rings. Ex vivo study confirmed that the addition of PEG-NHS to a hydrogel network prevented approximately 90% of airway collapse compared to the case without PEG-NHS. Overall, this study offers a promising approach to enhance the durability of adhesive hydrogels by the addition of PEG-NHS, thereby improving their overall performances for various biomedical applications.
Site-selective ring opening of bicyclo[n.1.0]alkanols: An Fe(II)-catalyzed 1,6-conjugate addition to p-quinone methides
Authors: Jha Neha , Mondal Subhadip , Kapur Manmohan
Published: August 2023

Herein, we report an efficient synthetic strategy for an Fe(II)-catalyzed site-selective ring opening of bicyclo[n.1.0]alkanols and their concomitant 1,6-conjugate addition to p-quinone methides. The selectivity induced is tuned exclusively by the substrate, thereby forming carbocycles of distinct sizes. Diverse synthetic transformations further enhance the utility of the protocol.
Thermally Activated Delayed Fluorescence in a Deep Red Dinuclear Iridium(III) Complex: a Hidden Mechanism for Short Luminescence Lifetimes
Authors: Pander Piotr , Zaytsev Andrey , Sil Amit , Baryshnikov Glib , Siddique Farhan , Williams J.A. Gareth , Dias Fernando B , Kozhevnikov Valery
Published: August 2023

The high luminescence efficiency of cyclometallated iridium(III) complexes, including those widely used in OLEDs, is typically attributed solely to the formally spin-forbidden phosphorescence process being facilitated by spin-orbit coupling with the Ir(III) centre. In this work, we provide unequivocal evidence that an additional mechanism can also participate, namely a thermally activated delayed fluorescence (TADF) pathway. TADF is well-established in other materials, including in purely organic compounds, but has never been observed in iridium complexes. Our findings may transform the design of iridium(III) complexes by including an additional, faster fluorescent radiative decay pathway. We discover it here in a new dinuclear complex, 1, of the form [Ir(N^C)2]2(u-L), where N^C represents a conventional N^C-cyclometallating ligand, and L is a bis-N^O-chelating bridging ligand derived from 4,6-bis(2-hydroxyphenyl)-pyrimidine. Complex 1 forms selectively as the rac diastereoisomer upon reaction of [Ir(N^C)2(u-Cl)]2 with H2L under mild conditions, with none of the alternative meso isomer being separated. Its structure is confirmed by X-ray diffraction. Complex 1 displays deep-red luminescence in solution or in polystyrene film at room temperature (λem = 643 nm). Variable-temperature emission spectroscopy uncovers the TADF pathway, involving thermally activated re-population of S1 from T1. At room temperature, TADF reduces the photoluminescence lifetime in film by a factor of around 2, to 1 s. The TADF pathway is associated with a small S1–T1 energy gap ΔEST of approximately 50 meV. Calculations that take into account the splitting of the T1 sublevels through spin-orbit coupling perfectly reproduce the experimentally observed temperature-dependence of the lifetime over the range 20 – 300 K. A solution-processed OLED comprising 1 doped into the emitting layer at 5 wt. % displays red electroluminescence, λEL = 625 nm, with an EQE of 5.5% and maximum luminance of 6300 cd m–2.
Field evidence of brown carbon absorption enhancement linked to organic nitrogen formation in Indo-Gangetic Plain
Authors: Choudhary Vikram , Mandariya Anil Kumar , Zhao Ran , Gupta Tarun
Published: August 2023

Atmospheric brown carbon (BrC), a short-lived climate forcer, absorbs solar radiation and is a substantial contributor to warming of Earth’s atmosphere. BrC composition, absorption properties, and their evolution are poorly represented in climate models, especially for aqueous media (e.g., fog, clouds). Aqueous phenomena such as clouds and fog are quite prevalent during wintertime in Indo-Gangetic Plain (IGP). In this study, we examined the evolution of water-soluble BrC (WS-BrC) mass absorption efficiency at 365 nm (MAEWS-BrC-365) and chemical characteristics, viz., low-volatile fraction of organic carbon and water-soluble organic nitrogen (WSON) to water-soluble organic carbon (WSOC) ratio (org-N/C) on diurnal scale and under varying aerosol liquid water content (ALWC) and relative humidity (RH) conditions during wintertime in central IGP. Diurnally, highest MAEWS-BrC-365 was observed during late night and morning time and was coincided with enhanced WSON formation and relative abundance of low-volatile organics. The lower MAEWS-BrC-365 during the afternoon time was due to photochemical aging; whereas fresh WS-BrC emissions due to increased biomass burning and vehicular emissions activities caused lower MAEWS-BrC-365 values during evening and early night time. Further, we observed that MAEWS-BrC-365 and org-N/C ratio increased with decrease in ALWC and RH, signifying that drying of bulk aerosol particle and aqueous droplets would be potentially accelerating the formation of nitrogen containing organic chromophores resulting in enhancement in WS-BrC absorptivity. We also obtained that direct radiative forcing of WS-BrC relative to that of EC was ~19% during wintertime at Kanpur and ~40% of this contribution was in UV-region. These findings highlight the importance of incorporating this atmospheric phenomenon in BrC framework for fog and clouds in global climate models.
Generation and Application of alpha,alpha-diboryl Radicals via Thiyl Radical Catalyzed Ring Opening of Vinyl Cyclopropyl Diborons: cis-Diastereoselective Borylative Cycloaddition with Alkenes
Authors: Vyas Het , Gangani Ashvin , Mini Aiswarya , Lin Shengjia , Chu Jia-Min , Agee Caitlyn , Gabriel Justin , Willamson R. Thomas , Zhang Yong , Sharma Abhishek
Published: August 2023

Carbon-centered radicals stabilized by adjacent boron atoms are underexplored reaction intermediates in organic synthesis. We report the development of vinyl cyclopropyl diborons (VCPDBs) as a versatile source of homoallylic a,a-diboryl radicals via thiyl radical catalyzed diboron-directed ring opening. The diboryl stabilized carbon-centered radicals underwent smooth [3+2] cycloaddition with a variety of olefins to provide highly substituted diboryl cyclopentanes in good to excellent diastereoselec- tivity. In contrast to the trans-diastereoselectivity observed with most of the dicarbonyl activated VCPs, the cycloaddition of VCPDBs showed a remarkable preference for formation of cis-cyclopentane diastereomer which was confirmed by quantitative NOE and 2D NOESY studies. The cis-stereochemistry of cyclopentane products enabled a concise intramolecular Heck reaction approach to rare tricyclic cyclopentanoid frameworks. The mild reaction conditions also allowed a one-pot VCP ring-opening, cy- cloaddition-oxidation sequence to afford disubstituted cyclopentanones. Control experiments and DFT analysis of reaction mecha- nism support a radical mediated pathway and provide a rationale for the observed diastereoselectivity. To our knowledge, these are the first examples of the use of geminal diboron group as activator of VCP ring opening and C-C bond formation reaction of a,a- diboryl radicals.
The Trend and Factors of Technology Adoption in Accounting
Authors:   Faculty of Accountancy, Universiti Teknologi MARA, Malaysia, A Rahim Muhammad Mustakim , Permatasari Devi ,   Department of Accounting, Faculty of Economics, Universitas Islam Sultan Agung, Indonesia, Mohammed Nor Farizal ,   Accounting Research Institute and Faculty of Accountancy, Universiti Teknologi MARA, Malaysia
Published: August 2023

The modern world heavily relies on data collection, analysis, and asset creation, and as businesses continue to expand, the amount of data they generate increases as well. However, this data is only valuable when it is transformed into useful information that can be used by accountants to support their organizations. This practice is essential for companies to maintain a competitive advantage over their competitors in the market. The adoption of technology provides new opportunities and insights, leading to smarter business decisions, more efficient operations, and increased profits. However, technology has significantly impacted the role of accountants in recent years, which is a critical issue that requires their attention. With the rise of cloud computing, artificial intelligence, and machine learning, accountants have the potential to provide even greater value to their organizations by automating repetitive tasks, identifying trends and patterns in data, and offering predictive analytics to inform business strategy. Therefore, accountants must embrace these changes and leverage technology to their advantage to help their organizations stay competitive in the fast-paced business environment.
Evaluation of the On the Job Training (OJT) Program of Vocational Colleges in Preparing Students Who Meet the Needs of Industry 4.0
Authors:   Fakulti Teknikal dan Vokasional Universiti Pendidikan Sultan Idris, Malaysia, Syed Muhammad Syed Mahathir bin , Mohammad Hussain Mohd Azlan bin ,   Fakulti Teknikal dan Vokasional Universiti Pendidikan Sultan Idris, Malaysia
Published: August 2023

The On the Job Training (OJT) program is a transition program for KV students into the job market, but the effectiveness of the implementation of this program is questionable. Therefore, this study was conducted with the aim of evaluating the implementation of KV's OJT program in preparing students who meet the requirements of Industry 4.0 in KV North Zone. The design of this study uses a quantitative approach of survey techniques. This research instrument uses a Likert scale questionnaire. The KIPP Assessment Model introduced by Stufflbeam was used as a research tool. The study sample consisted of 118 students and 108 lecturers under the Department of Mechanical and Manufacturing Technology from the field of Industrial Machinery Technology (TPI) and were selected by stratified simple random sampling from 13 KVs. Cronbach's Alpha coefficient will be used to obtain reliability values for the questionnaire items conducted during the pilot study. Descriptive analysis ie percentage value, mean and standard deviation are used to report the findings of the study. While inferential statistics that is t-test is used to see the difference in effectiveness between genders. The results of the study are expected to be able to provide the necessary information to decision makers. The impact of the study can add value to the implementation of OJT in KV.
An Analysis of the Factors Impacting Transformational Leadership Competencies: A Case Study of a Vietnamese Security Firm
Authors: Tuan Kim Manh , Long Le Nam
Published: August 2023

Purpose: The aim of this study is to examine which factors contribute the most to the transformational leadership competencies in the context of Vietnam.
 
Theoretical framework: Based on previous studies, in this paper, the author emphasizes the relationship among transformational leadership competencies, competitive advantages and firm performance.
 
Design/Methodology/Approach: By conducting a case study of a Vietnamese security firm, this author used The Exploratory Factor Analysis to analyse factors impacting transformational leadership competencies.
 
Findings:  Transformational leadership competencies of leaders can be ranked in strongest to weakest as follow: visionary thinking competencies, creativity competencies, adaptability competencies, relationship building competencies and inspirational communication competencies.
 
Research, practical & social implications: More research is needed on Vietnamese securities companies, particularly those experiencing a turnaround, to gain a comprehensive understanding. The study's proposed five factors of transformational leadership competencies are crucial as they enable leaders to develop their leadership competencies. Other securities companies in Vietnam can employ these factors for employee leadership competency training.
 
Originality/value: Visionary thinking competencies, creativity competencies, adaptability competencies are the three most crucial elements of transformational leadership competencies in the context of Vietnam changing economy landscape.
Exploring the Link Between Servant Leadership, Procedural Justice, Conflict Management, and Innovative Work Behavior in the Pakistani Textile Industry
Authors: Suppra Samina , Bhaumik Amiya , Mahmood Sultan Adal
Published: August 2023

Purpose: The drive of this study is to explore the serial mediation role of procedural justice (PJ) and organizational conflict management (OCM) between servant leadership (SL) and innovative work behavior (IWB).
 
Theoretical framework: Previous studies have proved that there is a positive relationship between SL & PJ, OCM & SL, PJ & IWB, and SL & IWB. But there is a gap in validation for a serial mediation role of PJ and OCM between SL and IWB.
 
Design/methodology/approach: A sample of approximately 250 personnel employed in the textile industry in Pakistan was graphed to gather the data. Structural equation modeling (SEM) was used to assess the data.
 
Findings:  This study revealed that SL had a substantial and beneficial effect on IWB, whereas PJ had a noteworthy and favorable effect on OCM. Additionally, OCM had a noteworthy and favorable effect on IWB.
 
Research, practical & social implications:  The study is beneficial for the growth of the textile industry, where administrative management is recommended to play the role of servant leadership for innovative work behavior of employees. It is also suggested to create an environment of conflict management and procedural justice to boost innovative work behavior.
 
Originality/Value:  There is a substantial and beneficial serial mediating effect of PJ and OCM between SL and IWB.
Avaliação e Diagnóstico Ambiental: Estudo de Caso de uma Empresa Metalurgica
Authors: Kiyomoto Alex Nakauti , Irazusta Silvia Pierre
Published: August 2023

Objetivo:  O objetivo foi realizar um estudo de caso, aplicando o sistema SBP, como ferramenta de diagnóstico e avaliação de desempenho ambiental de uma empresa do ramo de metalurgia.
 
Referencial teórico: A produção metalúrgica do pó de ferro, utilizando a atomização a água, envolve uma vasta cadeia de processos desde a matéria prima até o produto final. Diversos conceitos sustentáveis devem ser incorporados no desenvolvimento deste produto, considerando-se fatores como consumo energético, tipo de energia, recursos hídricos e resíduos produzidos. Dentre as diversas ferramentas para controlar e avaliar tanto qualitativamente quanto quantitativamente esses e outros aspectos num processo produtivo industrial a metodologia SBP, mostrou-se eficiente.
 
Desenho/Metodologia/Abordagem: A metodologia SBP mostrou-se eficiente e de baixo custo ao apontar, por meio de indicadores, a ordem de urgência e prioridade nas ações da empresa, bem como permite identificar as oportunidades de melhoria ao longo do processo.
 
Resultados: De acordo com o valor de corte estabelecido de 70% de índice de desempenho, a empresa apresentou bons resultados, atingindo 76%.
 
Pesquisa, implicações práticas e sociais: Diferentes setores da empresa responderam ao questionário, logo uma visão sistêmica desde a alta direção da empresa até o chão de fábrica mostrou que os recursos hídricos pedem maior urgência. Esta conclusão teve alta correlação com as informações obtidas pelos pesquisadores em contato pessoal com alta direção da empresa em que a questão água é muito sensível, mesmo antes da divulgação deste trabalho.
 
Originalidade/Valor: O construto recursos hídricos representou a maior urgência e prioridade para a tomada de ações pela empresa. A avaliação, portanto, orientou as medidas prioritárias para a e melhoria do seu processo, reduzindo desperdícios deste recurso.
Aplicação das Ferramentas da Qualidade no Processo de Melhoria Contínua em um Terminal Portuário de Santa Catarina
Authors: Adão Ana Carolina Souza Santos , Milnitz Diego
Published: August 2023

Objetivo: O principal objetivo é desenvolver uma alternativa de melhoria contínua no setor de contas a receber em relação à inadimplência nos processos de importação e exportação.

 

Referencial teórico: Atualmente, as empresas estão priorizando cada vez mais, a automatização dos processos no intuito de evitar a ocorrência de erros humanos, e ainda, facilitar a realização das atividades diárias dos funcionários, permitindo, ainda, um aproveitamento maior do tempo disponível da jornada de trabalho.

 

Desenho/metodologia/abordagem: O estudo tem natureza de pesquisa aplicada, pois busca a análise de um problema específico, e com abordagem quantitativa, pois a interpretação dos dados será elaborada a partir de análise de dados numéricos, em relação ao objetivo.

 

Resultados: Após a implantação das melhorias sugeridas e verificação da eficácia das medidas tomadas em relação à cobrança dos inadimplentes, o novo fluxograma proposto contribuirá para a redução do tempo de processo manual e, consequentemente, otimização do tempo das pessoas que estão envolvidas no processo, diariamente.

 

Pesquisa, implicações práticas e sociais: Sugerimos alternativas que diminuíram o trabalho operacionalizado na área de conta a receber em relação ao recebimento dos valores à vista referente aos processos de importação em uma empresa do setor portuário.

 

Originalidade/valor: Neste estudo de caso, verificou-se que a aplicação das ferramentas da qualidade pode auxiliar as empresas na identificação de problemas, na identificação das causas e no planejamento para, então, eliminar os entraves ou pelo menos, minimizá-los.
Striptease
Authors: Chakravarti Srinjay
Published: August 2023

Parashuram’s short story ‘Striptease’, titled ‘Nirmok Nritya’ in Bengali (Bangla), is rather popular for its novel treatment of the female body vis-à-vis the male gaze. In this story, Parashuram (alias Rajshekhar Basu) spotlights the objectification of the female body, but with a wicked twist. However, the dynamics of gender and the binaries of female/male sexuality are expressed in a matrix of Hindu mythology, which initially make the story, especially some of its referents, somewhat inaccessible to not just Western readers but anyone unfamiliar with the Indian milieu. Yet, given Basu’s genius, his treatment of the theme is such that the appeal of the short story is universal, irrespective of the culture the reader belongs to. The gentleness of his satire—without being titillating or obscene—is especially alluring. The Bengali title can be literally translated as ‘The Dance of the Shedding of Shells’, or ‘The Dance in which Skins are Sloughed Off’. This is typical of Parashuram’s understated, elliptical, implicit sense of humour. The Bengali title does contribute to the overall impact of the original story, but it would not be an appropriate one in an English translation. Ergo, the title that naturally suggested itself was ‘Striptease’.
PEMODELAN GUI BERBASIS QUADRATIC PROGRAMING UNTUK OPTIMASI PEMBANGKITAN PADA SISTEM SULSELRABAR
Authors: Djalal Muhammad Ruswandi , Robandi Imam
Published: August 2023

Dalam mengantisipasi order dari UP2B untuk beban tertentu selain beban maksimal, PLTU Barru harus mampu mengetahui unit mana yang lebih ekonomis untuk dioperasikan dengan beban lebih tinggi. Dimana nilai ekonomis dapat dilihat dari pemakaian batu bara yang lebih efisien. Hal tersebut bertujuan untuk PLTU Barru tetap dapat mengambil keuntungan lebih banyak disaat terdapat order beban selain beban maksimal dari UP2B. Dalam penelitian ini mambahas perbandingan metode ekonomi dispatch untuk memaksimalkan kondisi pada PLTU Barru yang tidak lagi di-order dispatcher secara maksimal. Sehingga operator PLTU Barru dapat menentukan pembagian alokasi daya yang di-order dispatcher ke dua unit pembangkit PLTU Barru. Metode yang digunakan dalam penelitian ini adalah metode quadratic programing. Dasar dari perhitungan ialah menghitung terlebih dahulu karakteristik pemakaian bahan bakar unit pembangkit saat beroperasi dalam satu hari. Data utama yang diambil ialah data hasil produksi listrik yang dikeluarkan generator dan pemakaian bahan bakar diambil dari flow coal feeder. Berdasarkan hasil penelitian diketahui bahwa metode quadratic programing dapat menghemat biaya produksi Rp. 7,34 per KWH.
PROTEKSI ROTOR SIDE CONVERTER UNTUK PEMBANGKIT LISTRIK TENAGA ANGIN MENGGUNAKAN CROWBAR
Authors: Suprapto Diantama Yoga
Published: August 2023

Pada saat ini energi listrik berbahan fosil semakin lama semakin berkurang jumlahnya. Maka dari itu, energi listrik tenaga angin dapat mengurangi pemakaian energi listrik berbahan dari fosil. Generator yang digunakan dalam pembangkit listrik tenaga angin adalah Double Fed Induction Generator (DFIG). Pada bagian stator tersambung dengan saluran (grid) dan bagian rotor terhubung dengan sebuah konverter yaitu back-to-back converter. Gangguan arus pada rotor side converter yang mengakibatkan kerusakan pada konverter. Pengujian dilakukan simulasi sistem proteksi crowbar pembangkit listrik tenaga angin pada sisi rotor side converter dengan variasi kecepatan 11 m/s, 13 m/s, dan 15 m/s. Pada penelitian ini didapatkan bahwa dengan memasang crowbar antara rangkaian rotor dan rangkaian rotor side converter dapat mengisolir arus rotor side converter saat gangguan pada variasi kecepatan angin yang berbeda-beda. Hasil dari penelitian ini pada kecepatan 11 m/s ketika diterapkan gangguan jaringan tiga fasa mendapat nilai sebesar 1.51 pu, pada kecepatan 13 m/s ketika diterapkan gangguan jaringan tiga fasa mendapat nilai sebesar 1.54 pu, pada kecepatan 15 m/s ketika diterapkan gangguan jaringan tiga fasa mendapat nilai sebesar 1.79 pu. Batas arus rotor side converter maksimal dari perhitungan yang ada memiliki nilai 1.37 pu. Crowbar dapat mengisolir gangguan arus yang melebihi batas arus maksimalnya.
ANALISIS PEMELIHARAAN KINERJA DENGAN METODE THERMOVISI PADA PERALATAN GARDU INDUK 500kV TAMBUN
Authors: Jainudin Jidan
Published: August 2023

Paper ini membahas tentang pemeliharaan kinerja pada peralatan Gardu induk 500kV dengan menggunakan metode thermovisi. Dalam usaha penyediaan energi listrik yang baik dan efisien, gardu induk memiliki peranan yang sangat penting untuk mengatur kebutuhan beban tenaga listrik dan sebagai pusat pengamanan komponen-komponen sistem tenaga listrik di suatu wilayah. Sering terjadinya gangguan merupakan parameter dari suatu sistem tenaga listrik apakah dikatakan baik atau tidaknya dalam usaha penyediaan energi listrik yang efisien. Salah satu tindakan pemeliharaan adalah pengukuran suhu pada komponen gardu induk  dengan menggunakan thermal imagers atau yang biasa disebut dengan pengukuran metode  thermovisi. Thermovisi adalah suatu teknik mendeteksi suhu  dari jauh dengan menggunakan sinar inframerah  kemudian  akan ditampilkan pada display untuk mengetahui suhu panas pada sambungan terminal antar kabel konduktor dan mendapatkan nilai selisih suhu sambungan terhadap suhu konduktor. Metode penelitian ini merupakan penulisan hasil dari pengukuran menggunakan metode thermovisi yang kemudian dilakukan analisa hasil thermovisi tersebut dengan melakukan perhitungan emisivitas melalui pendekatan selisih suhu klem dan konduktor (∆T) agar didapatkan nilai emisivitas yang sesuai. Hasil pengukuran selisih suhu klem terhadap konduktor diambil sebanyak 12 sampel dalam keadaan kondisi baik. Perhitungan emisivitas mendapatkan hasil akurasi 95,6% dan presisi 0,02% dari setiap data di bay Gardu induk 500kV Tambun. Keywords :Thermovisi, Sistem Tenaga Listrik, Emisivitas
PERAMALAN KINERJA AIR PREHEATER PLTU PELABUHAN RATU MENGGUNAKAN METODE JARINGAN SYARAF TIRUAN PERAMBATAN BALIK
Authors: Putra Wahyu Irwan , Yudono Muchtar Ali setyo
Published: August 2023

Air preheater merupakan salah satu komponen pada Pembangkit Listrik Tenaga Uap (PLTU). Air preheater merupakan alat penukar panas yang berguna untuk memanaskan udara dengan memanfaatkan kembali udara pada gas buang. menjaga efisiensi kinerja Air preheater menjadi salah satu indikator penting dalam rencana pemeliharaan untuk keandalan proses produksi listrik di PLTU, maka untuk membuat rencana pemeliharaan yang baik dibutuhkan peramalan kondisi kinerja Air preheater di PLTU menggunakan Jaringan Syaraf Tiruan Perambatan Balik. Data yang digunakan untuk melakukan peramalan diambil dari data konidisi kinerja Unit 1, Unit 2, dan Unit 3 PLTU Pelabuhan Ratu pada tahun 2017 hingga tahun 2021. Peramalan ini dilakukan dengan membagi data menjadi 2 yaitu data latih dan data uji. Data latih merupakan data AHGSE pada tahun 2017 sampai 2019, data uji merupakan data AHGSE pada tahun 2020 sampai 2021. Dengan menggunakan algoritma perambatan balik dan lapisan tersembunyi satu berjumlah 25 node, lapisan tersembunyi dua berjumlah 5 node, fungsi aktivasi logsig, purelin, purelin. Penelitian ini memiliki hasil terbaik didapat pada pengujian 3 dengan nilai MSE sebesar 1,0004x10-6. Penelitian ini dapat dikatakan baik karena memiliki nilai MSE yang kecil.
DEVELOPMENT OF E-MODULES USING AUGMENTED REALITY IN PHYSICS TEACHING AT HIGH SCHOOL OF MANOKWARI REGENCY
Authors: Allo Alberto Y T , Suhendra Christian Dwi
Published: August 2023

The development of the physics E-Module at this time really needs to be done because of the very rapid development of information technology and coupled with the Covid-19 pandemic situation which requires the availability of the physics E-Module so that it can assist students in learning physics both face-to-face and virtual learning. Based on preliminary observations made in public high schools and private high schools, it was found that the physics module used was a conventional module, namely the printed version of the physics module and the printed year of the module was out of date, so the module is less relevant when used today. The aim of this research is to develop a high school Physics e-module in Manokwari Regency so that it becomes a valid, effective and practical e-module. The method used is the four-D (4D) method. The population of this study were students of class XI IPA 4 at SMA Negeri 1 Manokwari and class XI IPA at SMA YAPIS Manokwari. This research produces an E-Module of Rotational Dynamics and Rigid Body Equilibrium using Augmented Reality (AR) which can be used interactively by students via mobile devices or computers, where in this E-Module there are simple experiments presented in the form of videos, animations using AR, virtual reality that can be accessed anywhere and anytime so that it can improve the physics learning outcomes of class XI IPA students. The purpose of this research is to produce E-Modules using AR in physics lessons that are practical and effective and can improve student learning outcomes.
EFFECTIVENESS OF DEVELOPMENT LEARNING MEDIA USING ELECTROCARDIOGRAMS (ECG) IN ELECTRICITY AND MAGNETIC LECTURES
Authors: Ilhami Fasih Bintang , Budiyanto Mohammad
Published: August 2023

Learning creative media can expedite and increase the efficiency of learning to lead to goals of learning that can be achieved owing to delivering easy message technology for learning purposes. This study aims to find out the effective development of learning media using electrocardiograms (ECG) in electricity and magnetic lectures. The population of this study was used students in electricity and magnetic lectures with a total of students 20 and samples were by purposive sampling technique. Data collection techniques used were questionnaires with pre-test and post-test and conducted by statistical analysis Paired t-test. The average score of students before being taught using learning media using ECG is 6.65 and significantly increases to 8.40 after being given a learning media using ECG. The effectiveness analysis of learning media using ECG by Paired t-test showed there is a significant difference between before and after being taught using learning media compared to before learning creative lectures with results α=0.000 < 0.05. Therefore, the development of learning creative media using ECG in electricity and magnetic lectures increasing of student knowledge which is fundamental considering utilize of ECG for possibly early detection of heart problems
CONFORMITY ANALYSIS OF CELL TOPICS IN BIOLOGY TEXTBOOK FOR 11TH GRADERS WITH THE BASIC COMPETENCIES OF CURRICULUM 2013
Authors: Nachrizanti Shania Aurora , Aprilia Nani
Published: August 2023

Textbooks are prepared to help teachers convey material to students in class easily. The textbook must meet the needs of students in its presentation by considering the suitability of the content of the material with the basic competencies to be achieved. This study aims to determine the level of conformity between the cell topics in the biology textbook for class XI and the basic competencies of the curriculum 2013 in terms of the breadth and depth of the material. This research is a quantitative descriptive study by analyzing the biology textbook for class XI from Erlangga and Yudhistira. The data collection technique used is observation using the observation sheet. The data analysis used descriptive quantitative. At the data analysis stage, it was carried out by several reviewers consisting of researchers, colleagues, and high school teachers in a Focus Group Discussion (FGD). The results showed that the suitability of the topic of cell in terms of the breadth of the material in textbooks A and B obtained a percentage of 75%. While the suitability of the content in terms of the depth of the material, the results obtained are 95.83% in textbook A and 83.33% in textbook B. It is because textbook A only fulfills 23 of the total 24 scores. Meanwhile, textbook B only fulfills 20 of the total 24 scores. Based on the study results, it can be concluded that the level of material breadth in textbooks A and B have an appropriate category. On the other hand, the level of material depth in textbook A and textbook B has a very appropriate category.
THE DEVELOPMENT OF PhET-ASSISTED INQUIRY-BASED ELECTRONIC WORKSHEETS TO IMPROVE COMMUNICATION AND COLLABORATION SKILLS
Authors: Rahayu Tanti , Wibowo Widodo Setiyo
Published: August 2023

Communication and collaboration skills are part of the 21st century skills that are very important for students to possess. Science learning with certain characteristics can be a means to develop these abilities. The aims of this study were: 1) to develop a viable PhET-assisted inquiry-based electronic worksheets, (2) to find out the practicality of the developed products based on student responses, (3) to test the effect of using the product to increase communication skills, and (4) to test the effect of using the product to increase collaboration skills. This research was a Research and Development (R&D) with a 4-D model consisted of define, design, develop, and disseminate. Product trial design using one group pretest-posttest on 32 students of class VIII B at SMPN 05 Depok. The data collection instruments consisted of product validation sheets, student response questionnaires, communication skills observation sheets and collaboration skills observation sheets. The product viability data were examined qualitatively and quantitatively descriptively. The paired sample t-test and effect size analysis were used to check the effect of the product toward communication and collaboration skills. The results show that PhET-assisted inquiry-based electronic worksheets are: 1) declared suitable for use in science learning, (2) considered practical for use in science learning, (3) effective in improving communication skills, (4) effective in improving collaboration skills.
CORELATION OF CRITICAL THINKING ABILITY TO LEARNING ACTIVITY AFTER FLIPPED CLASSROOM-PjBL LEARNING MODEL APPLICATION
Authors: Ekaputra Firdiawan
Published: August 2023

This study aimed to determine the correlation of critical thinking skills with learning activities after the application of the flipped classroom-PjBL learning model. The sample used in this study were students who took the assessment of the process and learning outcomes of chemistry class C in the 2022/2023 academic year of the Jambi University Chemical Education Study Program. The research method used is the correlation method with a quantitative approach. Research data were obtained using a questionnaire before and after the application of the flipped classroom-PjBL learning model to data on critical thinking skills and student learning activities. The questionnaire on critical thinking consists of 5 statements, while the questionnaire on learning activity consists of 10 statements. Data regarding critical thinking skills and learning activities were carried out Pearson correlation test to determine the relationship between the dependent variables, the correlation level of critical thinking skills and learning activities was carried out product-moment correlation test. The results of this study are that there is a very good correlation between students' critical thinking skills and learning activities after the application of the flipped classroom-PjBL learning model, the correlation level of critical thinking skills to learning activities is very high with a value of 0.813.
Hubungan Literasi Media dengan Persepsi Gender Siswa Sekolah Dasar
Authors: Ramadhani Amalia Nur , Martono Nanang , Puspitasari Elis , Sabrina Laila
Published: August 2023

Artikel ini menjelaskan hubungan literasi media dengan persepsi gender siswa SD. Penelitian ini dilakukan dengan menggunakan metode survei di dua SD di Purbalingga, Jawa Tengah yang lokasinya jauh dari pusat kota (pinggiran). Populasi penelitian ini berjumlah 80 siswa. Sampel yang digunakan adalah sampel jenuh 100% dari jumlah populasi. Hasil penelitian menunjukkan nilai korelasi tau kendall kedua variabel sebesar 0,23 dengan nilai signifikansi sebesar 0,03. Nilai tersebut menunjukkan terdapat hubungan positif antara literasi media dengan persepsi gender responden. Jadi, semakin tinggi literasi media responden maka, semakin bagus persepsi gender responden. Literasi media responden terbentuk melalui konten dan informasi yang diterima ketika menggunakan handphone, TV, komputer/ laptop, radio, dan koran atau majalah. Responden lebih sering menggunakan handphone karena mudah dan cepat dalam mengakses informasi. Konten dan informasi mengenai peran laki-laki dan perempuan yang diterima responden membentuk persepsi gender responden.
Teacher Immediacy dalam Pembelajaran Daring pada Siswa SMA
Authors: Tandyonomanu Danang , Huda Anam Miftakhul , Tsuroyya Tsuroyya , Aji Gilang Gusti
Published: August 2023

Penelitian ini bertujuan untuk mendapatkan gambaran tentang teacher immediacy dalam pembelajaran daring. Teacher immediacy merupakan penggunaan simbol verbal dan nonverbal untuk mendekatkan jarak fisik dan psikologis guru dan siswa. Perilaku immediacy ini dapat meningkatkan motivasi belajar siswa. Penelitian ini menggunakan metode campuran dengan pengambilan data secara survey dan Focus Group Discussion terhadap SMA terpilih secara muntistage random sampling di surabaya. Hasil penelitian menunjukkan bahwa pembelajaran daring susah untuk dipahami, lebih banyak tugas; fungsi guru tergantikan oleh teknologi; belajar sesama teman; dan ikut les. Sementara juga dijumpai nilai positif dengan pelaksanaan daring, seperti waktu lebih fleksibel, sehingga banyak waktu bisa dipergunakan untuk hal lainnya. Dalam hal guru favorit, yaitu sifat yang diharapkan ada dalam setiap guru yang mengajar adalah fun, care, friend dan smart.
TONGLING MUSIC INNOVATION WITH PRINGGOWULUNG WONOMULYO ART STUDIO, GENILANGIT, PONCOL, MAGETAN REGENCY
Authors: Darno Darno , Sutriyanto Sutriyanto , Setiawan Sigit
Published: August 2023

Tongling musical instrument derived from the words "kentongan" and "suling" a musical instrument made of bamboo material, is an art originating from the Pringgowulung Wonomulyo art studio, Genilangit village, Poncol district, Magetan regency, East Java. Wonomulyo creates and can preserve the art of tongling until now, because tongling music is an accompaniment during worship so that it can survive until now, using Darsono's artistic creation approach, is expected to produce a craft work in the form of a musical instrument using large bamboo material as an accompaniment and complement of Tongling musical instrument that already exists
FORM OF PRESENTATION OF UMAPOS DANCE IN BALANTAK TRIBAL COMMUNITY
Authors: Jamilah Jamilah , Yatim Heriyati , Padalia Andi
Published: August 2023

This study aims to find out and describe the Form of Presentation of Umapos Dance in the Balantak Tribe Community in Luwuk Banggai Regency, Central Sulawesi. This research uses a descriptive qualitative approach, focusing on the Form of Umapos Dance Presentation in the Balantak Tribe Community in Luwuk Banggai Regency, Central Sulawesi. Data are obtained through observation or observation, interviews, and documentation. Data analysis is carried out by reducing the data and inferring the data correctly. The results showed that the form of presentation of Umapos Dance in the Balantak Tribal Community in Luwuk Banggai Regency, Central Sulawesi, namely: Performers or dancers, Movements, dance accompaniment music, Floor patterns, makeup and clothing, property, and performance venues. This Umapos dance performance in ancient times was a series of Sumoili and Ummusulen dances for the repellent of danger to lower the seawater. Although these three dances are a series, they can still be performed separately or stand-alone. The later development of this dance was not only performed for rituals as well as for welcoming guests.
DESIGNING GROUP-BASED CHOREOLOGY LEARNING TOOLS TO IMPROVE THE QUALITY OF LEARNING IN STUDENTS
Authors: Sumiani Sumiani
Published: August 2023

This research answers the problems: 1) How are the learning tools needed by students in the material of the dance textual approach in the Choreology course in the Sendratasik Education Study Program and 2) How to design a Group Investigation-based learning tool for students on the material of the dance textual approach in the Choreology course in the Sendratasik Education Study Program FSD UNM. The learning tools that will be developed in this study use the ADDIE model, which is a model that is commonly used in learning in general, in this study it is only carried out up to the point of design or design. The results of the research are as follows: 1) Learning tools in the form of worksheets needed in the Choreology course in the Sendratasik Education Study Program, Faculty of Art and Design, UNM, are worksheets that can improve the quality of learning. Worksheets are designed based on the Group Investigation learning model which consists of four stages of activity, namely: planning, investigation, presentation, and evaluation.  The selection of the Group Investigation model with consideration of opportunities in the design of worksheets can be more varied since the activities in the syntax differ from beginning to end. Thus, it is hoped that the absorption of knowledge, skills, and attitudes in the teaching and learning process can be maximized. 2) The design of worksheets in the Choreology course in the Sendratasik Education Study Program, Faculty of Art and Design, UNM, especially on the competence of identifying change and textual sustainability of dance consists of two types, namely worksheets for groups and worksheets for individuals. The group worksheet consists of four activities, namely: planning the investigation, making an investigation, presenting the results of the investigation, and evaluating. At the stage of making an investigation activity, there is a task sheet for individuals where each member of the group gets the task of one aspect.
IMPLEMENTATION OF THE MEANINGFUL RECEPTION LEARNING APPROACH IN MOTION AND SONG LEARNING
Authors: Safitri Setiorini Rahma
Published: August 2023

This research is motivated by the implementation of the Meaningful Reception Learning approach in motion and song learning, which is seen as the most appropriate approach for students at PAUD Jelita. This approach is generally understood as the correlation of children's cognitive schemes to the new material given, resulting in a meaningful learning activity. However, on a practical level how it is implemented, so far no research has studied it. Based on the problems studied, namely regarding the implementation of the Meaningful Reception Learning approach in motion and song learning at PAUD Jelita, Pringsurat Village, Temanggung Regency, this research will use qualitative methods.  The activities carried out include data collection, data verification, analysis, and synthesis. The Meaningful Reception Learning approach in PAUD Jelita Pringsurat, Temanggung, is implemented in large class students whose students are 6 years old. The approach is appropriate when applied in large classes because students are more easily conditioned. The stages of the Meaningful Reception Learning approach can be passed effectively in large-class students. The stages passed are the initial settings (Advance Organizer). The initial arrangement is a classroom conditioning activity carried out by the teacher. Then the second is progressive differentiation, that is, learning from the general thing to the particular. Next is superordinate learning which is concept learning by relating concepts that have been previously understood. In the last stage, it is an integrative adjustment. The stages are carried out in the form of compiling material consisting of various concepts, in which the concepts have a general to a special relationship.
SEMIOTIC ANALYSIS OF THE MEANING OF WOOD CARVINGS IN TONGKONAN
Authors: Pasyah Soekarno Buhari
Published: August 2023

The symbol on the wooden carving of the Toraja traditional house (Tongkonan) is an important part of its construction, so the purpose of this article is to describe and analyze the symbol of power. This exploration uses subjective interpretive examination techniques, breaks down and describes the significance of things that are concentrated considering the reality on the ground, involves key witnesses as sources of information, utilizes essential and optional information through top-down meetings, field perceptions, action documentation, and references related to this examination. The semiotic model developed by Charles Sanders Peirce is used in this research data analysis method. The Toraja traditional house has sixty-seven types of wood carvings, but only four represent the symbol of the strength of the Tongkonan owner for the present and the future. In addition, the Tongkonan carving patterns represent the social status of the Toraja people. From the underlying information From information obtained, it can be said that the carvings on the Tongkonan depict images of objects and animals that exist in the Toraja people. The message contained in cutting the Tongkonan is a way of thinking about the life of the Toraja people themselves.