bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimization and Evaluation of Authentication System using Blockchain Technology
Authors: Riadi Imam , Ifani Aulyah Zakilah , Kusuma Ridho Surya 
Published: February 2022

User data security innovation is a particular concern in protecting one's privacy rights, which is one of the serious violations when an attacker can bypass the user authentication so that it looks like something legitimate and becomes legal. Based on these issues, the research aims at optimizing and evaluating the blockchain-based authentication systems to minimize data leakage, manipulate the data, and modify the data. Blockchain is one of the innovations that can solve this problem. Data or transactions in the blockchain are saved in hash form to make it difficult for hackers to break into them. The Blockchain implementation uses the Solidity programming language to build smart contracts and other tools such as MetaMask, Ganache, and Truffle. The Network Forensics Development Life Cycle (NFLDC) is used as a framework with the following five stages: Initiation, Acquisition, Implementation, Operation, and Disposition. Based on the research conducted, the attack strategy against blockchain-based systems consists of several scenarios covering the Burp Suite, XSS, SQL Injection, and DoS. The results show that the percentage of authentication optimization reaches a value of 90.1%, and 8.9% is the percentage for evaluating systems such as the possibility of cyberattack. Based on these results, this research has achieved its goals and may assist in further research. Doi: 10.28991/esj-2021-SP1-015 Full Text: PDF
3D Numerical Modeling to Evaluate the Thermal Performance of Single and Double U-tube Ground-coupled Heat Pump
Authors: Tarrad Ali H. 
Published: February 2022

The heat transfer rate and borehole design represent great challenges to the thermal equipment designer of the ground-coupled heat pump. The present model represents a mathematical and numerical technique implemented to tackle such a problem. A thermal assessment was established to estimate the total energy dissipated to the ground zone for a heat pump utilized for cooling purposes in the summer season. Comsol Multiphysics 5.4 software was used to build a 3-dimensional model to assess the thermal performance of single and double U-tube boreholes that circulate water as a thermal transfer medium. The (Heat Transfer) module has been implemented for this investigation under the (Stationary) study option. The model couples both heat conduction in solids, including tube metal, grout, and soil regions, and thermal medium fluid flow inside the U-tubes. The numerical solutions were compared for both heat exchangers at fixed borehole geometry, diameter, and depth and constant operating conditions in a steady-state mode. The double U-tube heat exchanger was tested in the parallel circuiting orientation of the U-tubes. The total mean resistance of the single U-tube borehole was higher than the half-loading double U-tube heat exchangers by 14.6%. The results also revealed that the heat transfer rate enhancement for the double U-tube was in the range of 10–14% when operating at the same fluid mass flow rate and inlet temperature for a given borehole design. Doi: 10.28991/HIJ-2022-03-02-01 Full Text: PDF
Cohesive Methodology in Construction of Enclosure for 3.6m Devasthal Optical Telescope
Authors: Bangia Tarun , Raskar Ramesh 
Published: February 2022

Building telescope enclosures is vital for setting up any optical observatory. An enclosure was constructed in remote hilly terrain to provide shelter to India’s largest 3.6 m Devasthal Optical Telescope (DOT). Primarily, the enclosure was built to protect the telescope from tough weather conditions and provide optimum space for performing various telescope related operational and maintenance activities. Other elements that were considered in the building enclosure were low thermal mass, sustainability, seismic and acoustic considerations. A steel building designed with mostly bolted connections, suitably selected materials, and mechanical systems for facilitating construction activities on site has been built for the telescope at the Devasthal site of ARIES. The enclosure construction was quite a challenging task with various project complexities. Multidisciplinary works of civil, mechanical and electrical systems in enclosure required efforts on various fronts in parallel to achieve the targets. Limitations of resources, manpower, and site conditions were managed to keep flexibility and economics in construction. Numerous challenges faced during the making of enclosures have been discussed in the paper. Insights into the construction of enclosures will provide a basic framework and learning opportunities for managing such typical construction projects in adverse weather conditions at mountainous sites. Doi: 10.28991/HIJ-2022-03-02-05 Full Text: PDF
Analytical Investigation of Higher Education Quality Improvement by Using Six Sigma Approach
Authors: M. S. Ameen Abdulla , E. G. Kavilal 
Published: February 2022

For over two decades in India, the technical industry's unique selling proposition (USP), with its wide infrastructure of technical institutes, has been capable of supplying best-in-class engineers. But recently, this claim does not hold water. According to the All India Council for Technical Education (AICTE), about 2.6 lakh mechanical engineers graduate every year in India. But the real count of industry ready mechanical engineers is approximately 7%. Hence, there is a need to assess the quality of engineering education in India to reduce the flaws in higher education. The purpose of the paper is to identify the various defects associated with technical education and eliminate those defects using various quality tools. This research is based on the six sigma technique, which is used to assess the quality criteria proposed by the National Board of Accreditation India (NBA). The proposed model is then applied to a typical tier II Indian engineering college located in south India. Six Sigma has two main methodologies: DMAIC and DFSS. The DMAIC (Define, Measure, Analyze, Improve, and Control) methodology is implemented for existing systems, whereas DFSS (Design for Six Sigma) is for assuring quality in new products. In this project, the conclusion is driven by the DMAIC methodology. Various statistical and non-statistical tools are employed in this research. The tools used are CTS-CTQ, SIPOC, Pareto chart, normal process capability analysis, one-way ANOVA, Ishikawa diagram, FMEA, RCBD, and SPC chart. All the statistical processes are done using Minitab analytical software. From the results, it is identified that the factors that have a risk priority number (RPN) greater than 300 need improvement, such as versatility in program curriculum, laboratories and workshops, and credibility among universities. Six Sigma can be achieved by developing proper strategies for mitigating these defects. Doi: 10.28991/HIJ-2022-03-02-07 Full Text: PDF
Characterization of Structural Transition and Heterogeneity under Compression for Liquid Al2O3 Using Molecular Dynamics Simulation
Authors: Kien Pham Huu , Nhu Tran Thi Quynh , Trang Giap Thi Thuy 
Published: February 2022

We have performed a simulation of the structural transition and Structural Heterogeneity (SH) in liquid Al2O3 at 3500 K, in the range of 0–100 GPa. The results confirmed that the network structure of liquid alumina is built mainly from AlOx (x = 3, 4, 5, 6, 7) units, which are related to each other through the common oxygen atoms. The existence of separate AlO3-, AlO4-, AlO5-, AlO6- and AlO7- phases, where SH of the network structure can be sufficiently determined, besides, the existence of separate phases is clarified for SH in the liquid of Al2O3. In particular, at a pressure below 10 and beyond 20 GPa, AlOx units are uniformly distributed in the space and non-uniformly distributed in the range 10-20 GPa. Our study is expected to contribute to a simple way to determine the structural heterogeneity and diffusion coefficients of oxide systems. Doi: 10.28991/HIJ-2022-03-02-08 Full Text: PDF
Biblioterapia na produção científica strictu sensu no Brasil
Authors: Moreira Cristiano , Hamanaka Raíssa Yuri 
Published: February 2022

Percebe-se que qualquer área do conhecimento, desde a sua gênese, norteia-se com base em paradigmas moldados pelas transformações sociais. Diante deste cenário, a profissão do bibliotecário vem sofrendo também inúmeras transformações oriundas das necessidades que envolvem seus usuários. A Biblioteconomia pode ser entendida como um campo científico que se preocupa em dar acesso a documentos, sendo caracterizada pelo enfoque material (das coleções de documentos), enfoque organizacional (relacionado a infraestrutura física e administrativa da biblioteca), enfoque intelectual (tratamento informacional dado aos documentos para que possam ser recuperados) e o enfoque do usuário. Neste sentido, surge como uma nova possibilidade de atuação a biblioterapia que consiste na adoção da leitura no tratamento de pacientes com algum tipo de transtorno psíquico ou psicológico. Por ser um ramo de atividade do bibliotecário ainda pouco explorado, pretende-se responder à seguinte questão de pesquisa: como a biblioterapia tem sido abordada na produção científica strictu sensu no Brasil? A pesquisa é caracterizada como qualitativa, com objetivos exploratório e descritivo e avaliou as teses e dissertações disponíveis nas bibliotecas digitais de teses e dissertações da Capes e do Ibict. Com a análise dos resultados, foi possível concluir que a biblioterapia tem sido pouco explorada na Ciência da Informação, o que demanda um esforço conjunto de pesquisadores e instituições de ensino para consolidar o estudo desta disciplina na perspectiva do bibliotecário.
IDENTIFICATION OF HORST AND GRABEN STRUCTURAL PATTERNS USING GRAVITY AND SECOND VERTICAL DERIVATIVE (SVD) METHODS IN THE LUBUKSIKAPING AREA OF WEST SUMATERA
Authors: Zulkaromi Muhammad , Setiadi Imam , Suharno Suharno , Mulyatno Bagus Sapto , Haerudin Nandi , Ferucha Istifani 
Published: February 2022

The Lubuksikaping area is located between the main fault branching of the Sumateran Fault so it can be seen that there are many quite complex structures. This research was conducted to determine the structure pattern of the high (horst) and low (graben) that formed in the sub-surface of the Lubuksikaping area, West Sumatera. This research uses gravity data which will then be carried out by spectral analysis, upward continuation, separation of regional and residual anomalies, and Second Vertical Derivative (SVD) analysis. Furthermore, 2D forward modeling is carried out to determine the correlation between the 2D subsurface forward modeling and the resulting SVD graph. Based on the analysis of the regional anomaly map, it can be seen that the measured low anomaly is due to the area in the form of a structural valley formed due to the activity of the Sumatera Fault, while the high is thought to be a structural hill (horst) that forms an elongated mountain range and separated by graben. In addition, based on the analysis of the residual anomaly map, it can be seen that the low anomaly indicates the presence of a depositor (graben), whereas, the high anomaly is indicated as the presence of rocks with high-density contrast values. and is interpreted as a horst structure. Based on the analysis of the horst and graben patterns in the residual Bouguer anomaly, it can be seen that there is an elevation zone (horst) that are northwest and northeast on the residual map and it is known that there are 3 graben structures in Lubuksikaping, namely Panyabungan Graben, Rao Graben and Sumpur Graben with relative northwest-southeast direction. The 2D models of paths A-A' and B-B' show faults that are located relatively the same as the SVD graph obtained from the residual SVD anomaly map.
The Effectiveness of Mathematical Learning Based on WhatsApp Groups Assisted by LKPD and Student’s Motivation
Authors: Putri Laras Eprilia , Arigiyati Tri Astuti , Taufiq Irham 
Published: February 2022

<p><em>This research is a quasi-experimental research that aims to determine whether online learning based on WhatsApp Group with LKPD assistance is more effective than with-based online learning WhatsApp Group without the assistance of LKPD in terms of student learning motivation towards mathematics learning outcomes of class VII students at SMP Negeri 3 Jetis. The data analysis technique used t-test, prerequisite test in the form of normality test and homogeneity test, Mann-Whitney test, and Kruskal Wallis test. The result of this study is that online learning based on WhatsApp Group with the assistance of LKPD is as effective as online learning based on WhatsApp Group without the assistance of LKPD and the mathematics learning outcomes of students with high motivation are better than students with moderate and low motivation.</em></p>
RANCANG BANGUN LASER UNTUK PEMBELAJARAN OPTIKA DALAM MENENTUKAN INDEKS BIAS DAN DIFRAKSI KISI
Authors: Winingsih Puji Hariati 
Published: February 2022

This research is executed as a mean to make laser with energyÂ from ex- materials ( DVD) to be used to determine refractive index andÂ difraction. For that, have been made laser diode appliance network used to determineÂ \Kprism refractive index and laser wavelength [pass/through] difraction. This research is used by analysis with refractive index characteristic and difraction. Obtained result of that level of prism refractive index at variation ofÂ i1Â (30o, 45o dan 60o) equal to (1.53 Â± 0.07), (1.45 Â± 0.08) and ( 1.53 Â± 0.08). Green Laser wavelength at variation of N (100, 300 and 600 line / mm)successively equal to (500 Â± 0.03),Â Â (525 Â± 0.02) and (541 Â± 0.07). Pursuant to prism refractive index theory of[is level of 1.5 and green colour laser wavelength range from (500 â€“ 570) nm. So that can be concluded that result of research have as according to this appliance and theory haveÂ earned to be told good to used in study of optics
PENGUKURAN NILAI INTANGIBLE PADA PROJECT BASED ORGANIZATION
Authors: Kurniawan V. Reza Bayu 
Published: February 2022

Intangible factor is a very important factor. The importance of measuring the value of intangible has become a challenge for a company nowadays, not only for functional companies (functional-based organization) but also for project companies (project-based organization). This research aimed to identify intangible factors and measure the value of intangible in organizations which are in the form of project. The value of measured intangible can be used to predict the potential gained value of a project conducted by a company. The object of this research is a project-based company running business on repair and maintenance service (after sale service), logistic, and general contractor (general construction). The identification process of intangible was done by using Analytic Hierarchy Process (AHP) method.Â Then, a prediction model for determining the project value was made by considering its intangible factor. This model was made using multiple-regression analysis. Intangible factors that have been identified are technology, human knowledge, management capability, networking, and financial support. The intangible values of each intangible factor and their qualities respectively are: management capability is 0.444, networking is 0.262, financial support is 0.152, human knowledge is 0.089, and technology is 0.052. From the measured intangible, it can be seen that the value of mean square error (MSE) is 0.0065. It shows that this prediction model can be used to predict a project value by considering its intangible factor
FREKUENSI ALAMI RANGKA BATANG SEMI-KAKU DENGAN EFEK GAYA AKSIAL
Authors: Irawan Ruly 
Published: February 2022

This article presents the natural frequency analysis of beam framework and axial force effect. The analysis considers the modification of mass matrix, rigidity, and geometric matrix of semi-rigid beam framework.Â The rigidity matrix, mass, and semi-rigid geometric connecting rod were derived from polynomial Hermite modification. This paper shows an example of natural frequency of beam framework with axial force effect or not. The results of analysis were used to show the efficiency of the calculation of beam frame work model with semi-rigid connection, which results in a more realistic solution than rigid connection model. This paper also shows that the change of axial force can result in the change of natural frequency of beam framework. Besides, this method can be used to examine any building because it can calculate the effect of structural rigidity
GEOMETRI ANALITIK BIDANG PADA KOORDINAT MIRING
Authors: Wijayanto Zainnur , Kusmanto Kusmanto 
Published: February 2022

The aim of this study was to determine (1) the shape and properties of any of the lines in the coordinate oblique, (2) the shape and properties of any of the circles on the coordinate oblique, (3) the shape and properties of any of parabola in oblique coordinates, (4) the shape and properties of any of the ellipse in oblique coordinates, (5) the shape and properties of any of the hyperbole in oblique coordinates.The method to be used is a literature review to collaborate with existing theories.The results showed that the equation of the line through p1=(x1-y1)Â and Â p2=(x2-y2)Â at oblique coordinate Â a becomes = y-y1 =mr(x-x1) with mr=tan (180-a) B mr=(y2-y1)/(x2-x1)
FIKSATOR UNTUK PEWARNA ALAMI (Natural Dyes Fixator)
Authors: Susiati Yasmi Teni , Kartikasari Enggar 
Published: February 2022

Natural dyes has a feature to produce soft colors. One of the natural dyes that can be used is pinang extract which applied to the jumputan textile. This research generally try to discover the effectiveness of pinang extracts for textiles coloring in terms of color fading endurance against the washing using whiting fixator and gambir. The research was conducted in PKK FKIP UST laboratory. The research population was: textiles, pinang extract, whiting and gambir. The research samples : textiles, pinang extract, whiting and gambir with the two treatments, the 10% and 20% concentration. This research using experimental methods and then tested in the Laboratorium Balai Batik. The assessment Â results Â of Â IndonesianÂ National Â StandardÂ (SNI) is Â grey Â scale. Visually, the result produced light brown color without the fixator, while using the whiting fixator produced a dark brown color and gambir produced yellowish brown color. Whiting fixator better than gambir because it produce sharper colors and has a higher value of color change.
PENGEMBANGAN BAHAN AJAR MATEMATIKA SMA BERBASIS GEOGEBRA VERSI ANDROID
Authors: Budiman Hedi , Ramdhani Sendi 
Published: February 2022

Geogebra versi android merupakan inovasi perangkat lunak matematika yang dapat digunakan oleh guru atau siswa dalam proses pembelajaran. Penelitian ini bertujuan untuk mengembangkan bahan ajar matematika SMA pada fungsi kuadrat grafik, persamaan sumbu simetri, dan titik puncak berbasis geogebra versi android. Dalam proses pembelajaran, guru menjelaskan dan mengkonstruksi pengetahuan siswa tentang beberapa konsep materi dan mendorong siswa untuk membangun pengetahuannya sendiri. Siswa menggunakan geogebra versi android untuk membuat dugaan dan menemukan beberapa konsep fungsi kuadrat grafik pada lembar aktivitas siswa. Metode yang digumnakan adalah penelitian pengembangan atau development research tipe formative research. Adapun yang dikembangkan adalah perangkat pembelajaran berupa bahan bahan ajar matematika interaktif berbasis aplikasi Geogebra versi Android. Penelitian ini dilaksanakan pada semester ganjil tahun ajaran 2017/2018. Subjek dalam penelitian ini 36 siswa kelas X di salah satuÂ SMA di Cianjur. Hasil penelitian menunjukkan pada pencapaian siswa terdapat 75 % siswa memperoleh nilai sangat baik, rata-rata aktivitas siswa tergolong efektif dalam proses pembelajaran, respon siswa poritif terhadap bahan ajar, dan semua siswa dapat menyelesaikan soal-soal yang ada di LKS.
PENENTUAN BEBAN KERJA MENTAL PERAWAT BERDASARKAN SHIFT KERJA DAN JENIS KELAMIN MENGGUNAKAN METODE NATIONAL
Authors: Widiastuti Retno , Purnomo Dian Eko Hari , I.M Adhitya Nur 
Published: February 2022

Instalasi Â Gawat Â Darurat Â merupakan Â salah Â satu Â unit Â lingkungan Â kerja, Â yang Â memiliki kecenderunganÂ tingkat bebanÂ kerjaÂ tinggi.Â HalÂ iniÂ dimungkinkan karena perawatÂ ruang Gawat Â Darurat Â dihadapkan Â pada Â pasien Â dengan Â kondisi Â jiwa Â yang Â terancam, Â sehingga membutuhkan perhatian, pengetahuan dan Â keterampilan khusus untuk dapat memberikan tindakan dengan cepat dan tepat. Instalasi Gawat Darurat Â memiliki peran sebagai gerbang utama jalan masuknya penderita gawat darurat. Perawat IGD harus selalu siap selama 24 jam karena pasien bisa datang kapanpun dan dengan kondisi yang berbeda.Penelitian Â ini Â bertujuan Â untuk Â mengetahui Â tingkat Â beban Â kerja Â mental Â yang Â dirasakan perawatÂ berdasarkanÂ shiftÂ kerjaÂ danÂ jenisÂ kelaminÂ perawatÂ diÂ InstalasiÂ GawatÂ Darurat Rumah Sakit Nur Hidayah Â Bantul. Metode yang digunakan dalam Â penelitian ini adalah NASA-TLX. Hasil penelitian dapat disimpulkan bahwa berdasarkan penelitian yang dilakukan di Rumah Sakit Nur Hidayah Bantul pada Instalasi Gawat Darurat, tingkat beban kerja mental yang dirasakan perawat berdasarkan Â shift kerja adalah 69,7% pada shift pagi, 76,7% pada shift sore, dan 83% pada shift malam. Sedangkan beban kerja mental perawat berdasarkan jenis kelamin adalah 77,7% untuk perawat laki-laki dan 75,9% untuk perawat perempuan
PENGARUH ANALISIS INVESTASI TERHADAP KELAYAKAN PENAMBANGAN BATU MANGAN DI PT. BERKAT ESA MINING
Authors: Sari Ceni Febi Kurnia , Sawaki Magriet Ester , Sabarofek Margareth Sylvia 
Published: February 2022

Pada saat ini PT. Berkat Esa Mining merencanakan akan melakukan investasi proyek di bidang pertambangan batu mangan yang ditargetkan beroperasi pada tahun 2018 ini. Perhitungan biaya investasi adalahÂ meliputiÂ Â danaÂ yangÂ dikeluarkan oleh Â PT. Berkat Esa Mining sebagai akibat realisasi kegiatan dalam biaya konstruksi infrastruktur baru, pembelian atau pengadaan peralatan, dan lain-lain sampai kegiatan proyek penambangan batu mangan tersebut siap dilakukan. Kriteria penilaian finansial merupakan alat bantu bagi manajemen untuk membandingkan dan memilih alternatif investasi yang akan dilakukan. Ada beberapa macam kriteria penilaian finansial yang dianggap baku, yang mana diantaranya memperhitungkan konsep ekuivalen seperti Net Present Value (NPV), Internal Rate of Return (IRR). Sedangkan kriteria penilaian yang tidak memperhitungkan konsep ekuivalen yang digunakan adalah metode periode pengembalian (Payback Period). Berdasarkan analisis aliran kas dan analisis sensitifitas yang telah dilakukan, besarnya nilai IRR yang lebih besar dari discounted factor yang menunjukkan bahwa kegiatan penambangan ini dapat mendapatkan keuntungan sebesar 104,35 %Â Â dari margin biaya keseluruhan kegiatan penambangan. Selain itu, nilai Payback period sebesar 1 tahun 2 bulan juga menunjukkan bahwa kegiatan penambangan ini, modalnya akan kembali pada tahun kedua kegiatan penambangan.Â