bluuebunny/crossref_metadata_2025_split huggingface dataset:
Peningkatan Kualitas Citra X-Ray Paru-Paru Pasien Covid-19 Menggunakan Metode Contrast Limited Adaptive Histogram Equalization
Authors: Tinaliah Tinaliah , Elizabeth Triana 
Published: January 2022

Abstract - Covid-19 is currently a pandemic around the world, and until now there has been no specific cure for this disease. An x-ray examination of the lungs is one of the tests that can be done to detect Covid-19. X-ray results must be read carefully to determine whether the patient is really exposed to Covid-19. Improved quality of x-ray images is needed to help doctors or health practitioners see more clearly the x-ray results of the lungs. One of the methods used to improve image quality is the CLAHE method. This method is a simple and efficient method to implement and is able to produce a better image than the original, unprocessed image. Based on the test results, it can be concluded that the CLAHE method can improve the quality of x-ray images of the lungs. The CLAHE method with the Rayleigh distribution has the lowest average MSE value of 0.01474 and has the highest average PSNR value of 18.6642 dB compared to the Uniform distribution and the Exponential distribution.Keywords - Covid-19, Lung X-ray, Image Enhancement, and CLAHE. Abstrak – Covid-19 saat ini telah menjadi pandemi di seluruh dunia. Obat khusus untuk penyakit covid-19 sampai saat ini belum ditemukan. Covid-19 dapat dideteksi dengan melakukan pemeriksaan menyeluruh, yaitu salah satunya dengan menggunakan pemeriksaan x-ray paru-paru. Pembacaan hasil x-ray harus dilakukan secara teliti untuk menentukan apakah pasien benar terkena Covid-19. Untuk membantu dokter ataupun praktisi kesehatan dalam lebih jelas untuk melihat hasil x-ray paru-paru, maka dibutuhkan peningkatan kualitas citra x-ray agar hasil kualitas citra dapat lebih baik dan lebih jelas dibaca. Metode CLAHE merupakan metode yang dapat digunakan untuk peningkatan kualitas citra. Metode ini merupakan metode yang simpel dan efisien untuk diimplementasi, serta dapat menghasilkan citra yang lebih baik. Berdasarkan hasil pengujian dapat disimpulkan bahwa dengan menerapkan metode CLAHE hasil kualitas citra x-ray paru-paru dapat lebih ditingkatkan. Nilai rata – rata MSE Metode CLAHE dengan distribusi Rayleigh mempunyai nilai rata – rata yang paling rendah sebesar 0.01474, dan mempunyai nilai rata – rata PSNR yang paling tinggi sebesar 38.6642 dB dibandingkan distribusi Uniform dan distribusi Exponential.Kata Kunci - Covid-19, X-ray Paru-Paru, Peningkatan Kualitas Citra, dan CLAHE.
Implementasi Data Mining dalam Mengklasifikasikan UKT (Uang Kuliah Tunggal) pada UIN Sumatera Utara Medan
Authors: Triase Triase , Samsudin Samsudin 
Published: January 2022

Abstract – Single Tuition Fee (UKT) is a tuition payment system that is applied in Indonesian public tertiary institutions, especially for undergraduate programs starting from the 2013/2014 - present academic year. UKT payments that are borne by each student are not the same, due to the cross subsidy system based on the economic and social conditions of the student's parents / guardians. The State Islamic University of North Sumatra Medan (UINSU) is one of the state universities that applies the UKT payment system into 7 groups, namely Group I, Group II, Group III, Group IV, Group V, Group VI, Group VII. The results of the survey to students showed that some students received a UKT amount that was not in accordance with the UKT group, and UINSU gave students the opportunity to appeal to UKT. The appeal process caused the UKT committee to take time. Therefore, the researcher will provide a solution with the classification technique data mining, namely the Naïve Bayes Algorithm. The algorithm serves to predict the suitability of the UKT size group for new students. The results can be used to design a decision support system in classifying the UKT amount for new students so that it can be used as a recommendation for the university in determining the new student UKT group.Keywords - UKT, Data mining, Classification, Naïve bayes. Abstrak – Uang Kuliah tunggal (UKT) merupakan sistem pembayaran uang kuliah yang diterapkan di perguruan tinggi negeri Indonesia khususnya untuk program sarjana dimulai dari tahun akademik 2013/2014 sampai saat ini. Pembayaran UKT yang ditanggung oleh setiap mahasiswa tidak sama, dikarenakan adanya sistem subsidi silang yang didasarkan atas kondisi ekonomi dan sosial orang tua/wali mahasiswa. Universitas Islam Negeri Sumatera Utara Medan (UINSU) adalah salah satu perguruan tinggi negeri yang menerapkan sistem pembayaran UKT menjadi 7 kelompok yaitu Kelompok I, Kelompok II, Kelompok III, Kelompok IV, Kelompok V, Kelompok VI, Kelompok VII. Hasil survey kepada mahasiswa, bahwa beberapa mahasiswa mendapat besaran UKT tidak sesuai dengan kelompok UKT, dan UINSU memberikan kesempatan kepada mahasiswa untuk banding UKT. Proses banding menyebabkan memakan waktu panitia UKT. Oleh sebab itu, peneliti akan memberikan solusi dengan datamining teknik klasifikasi yaitu Algoritma Naïve bayes. Algoritma berfungsi untuk memprediksi kesesuaian kelompok besaran UKT mahasiswa baru hasilnya dapat digunakan untuk merancang sistem pendukung keputusan dalam mengklasifikasikan besaran UKT mahasiswa baru sehingga dapat dijadikan rekomendasi bagi pihak universitas dalam menentukan kelompok UKT mahasiswa baru.Kata kunci – UKT, Data mining, Klasifikasi, Naïve bayes.
Modifikasi Algoritma Affine Cipher untuk Mengamankan Data
Authors: Nasution Adnan Buyung 
Published: January 2022

Abstract - The Affine Cipher algorithm is part of classical cryptography which is a method of substitution in data security, namely shifting the plaintext by multiplying the plaintext value with a key with a prime number value. The weakness of the Affine Cipher Algorithm is its easy to use key. Therefore, the author wants to modify the Affine Cipher algorithm by dividing the plaintext into blocks with the length of the specified key (k). After that, change the position of each character by reversing its position and then do the Affine Cipher algorithm process. This algorithm modification can hide the message and return it in the form of original data (plaintext) without causing data loss. This research concludes that the encrypted message by modifying the affine cipher becomes more random. The process in this research only uses the alphabetic characters (a to z) so it is hoped that it can add other characters such as numbers, symbols and others.Keywords - Affine Cipher, Data Security, Plaintext, Weaknesses, Affine Cipher Modification Abstrak - Algoritma Affine Cipher merupakan bagian dari kriptografi klasik yang merupakan metode substitusi dalam pengamanan data, yaitu melakukan pergeseran plaintext dengan mengalikan nilai plaintext dengan kunci bernilai bilangan prima. Kelemahan Algoritma Affine Cipher adalah kunci yang mudah digunakan. Oleh sebabnya, penulis ingin memodifikasi algoritma Affine Cipher dengan membagi plaintext menjadi blok-blok dengan panjang sebanyak kunci (k) yang telah ditentukan. Setelah itu, merubah posisi setiap karakter dengan cara membalikkan posisinya dan selanjutnya melakukan proses algoritma Affine Cipher. Modifikasi algoritma ini dapat menyembunyikan pesan dan mengembalikan dalam bentuk data asli (plaintext) tanpa menyebabkan kehilangan data. Penelitian ini memiliki kesimpulan bahwa pesan yang terenkripsi dengan memodifikasi affine cipher menjadi lebih teracak. Proses pada penelitian ini hanya menggunakan karakter alphabet (a hingga z) sehingga diharapkan dapat menambahkan karakter lainnya seperti angka, simbol dan lainnya.Kata Kunci - Affine Cipher, Pengamanan Data, Plaintext, Kelemahan, Modifikasi Affine Cipher
Penerapan Metode Analytical Hierarchy Process (AHP) dan Simple Additive Weighting (SAW) dalam Pemilihan Tembakau Terbaik
Authors: Irawati Novica , Simargolang Muhammad Yasin , Siregar Yustria Handika , Wati Evi Kurnia 
Published: January 2022

Abstract - Indonesia is one of the good tobacco producing countries. Tobacco is a plant that is grown by farmers and is a seasonal agricultural product that functions as a material to fill one's spare time or commonly referred to as raw material for cigarettes and cigars. In addition, the function of tobacco is also as a medical raw material (drugs, and tobacco can also be chewed. From the known function of tobacco leaves. Therefore, there is a need for requirements in selecting the best termbakau leaves based on the criteria determined by the tobacco production company, namely elasticity. , light color, aroma, sorting, price. Therefore, the researcher built a decision support system for selecting the best tobacco leaf which later aims to make it easier for farmers to choose which leaves are suitable or not for production. This research uses two methods, namely the method Analytica Hierarchyl Process (AHP) to determine eigenvalues as well as consistency and Simple Additive Weighting (SAW) to determine the suitability rating and also the ranking results. Keywords - Tobacco Leaves; AHP; SAW Abstrak - Negara Indonesia adalah salah satu negara penghasil tembakau yang baik. Tembakau adalah sebuah tanaman yang di ditanam oleh petani dan sifatnya produk pertanian musiman yang berfungsi sebagai bahan mengisi waktu luang seseorang atau biasa disebut dengan bahan baku rokok dan juga cerutu. Selain itu fungsi tembakau juga sebagai bahan baku medis (obat-obatan, dan juga tembakau dapat di kunyah. Dari fungsi daun tembakau yang telah diketahui. Maka diperlukan nya persyaratan dalam pemilihan daun termbakau yang baik berdasarkan kriteria yang sudah ditentukan oleh perusahaan produksi tembakau yaitu elastisitas, warna terang, aroma, sortasi, daya bakar (tahan lama). Oleh karena itu, peneliti membangun suatu sistem pendukung keputusan pemilihan daun tembakau terbaik yang nantinya bertujuan untuk memudahkan para petani memilih manakah daun yang layak atau tidak nya untuk di produksi. Penelitian ini menggunakan dua metode yaitu metode Analytica Hierarchyl Process (AHP) untuk menentukan nilai eigen dan juga konsisten dan Simple Additive Weighting (SAW) menentukan rating kecocokan dan juga hasil perangkingan.Kata Kunci - Daun Tembakau; AHP; SAW
PERLINDUNGAN HUKUM TERHADAP PEKERJA KONTRAK STASIUN PENGISIAN BAHAN BAKAR UMUM (SPBU) 54.801.01 YANG TERKENA PHK AKIBAT PANDEMI COVID-19
Authors: I Gusti Bagus Hengki Ni Kadek Lita Nuari Efendi 
Published: January 2022

Penelitian ini bertujuan untuk menganalisis perlindungan hukum terhadap pekerja kontrak stasiun pengisian bahan bakar umum (SPBU) 54.801.01 yang terkena phk akibat pandemi covid-19. Tipe penelitian yang dipakai pada penyusunan skripsi ini adalah penelitian hukum empiris. Jenis pendekatan yang dipakai pada penelitian ini yaitu pendekatan fakta (the fact approach) dan pendekatan sosiologis. Sumber data yang digunakan di dalam penelitian ini diambil dari data primer dan data sekunder. Teknik pengumpulan data primer dan sekunder yang digunakan adalah sebagai berikut: Teknik wawancara, Teknik Studi dokumen, dan Teknik Observasi/Pengamatan. Hasil penelitian menunjukkan bahwa mekanisme pemutusan hubungan kerja pada pekerja kontrak SPBU 54.801.01 akibat pandemi Covid-19 secara optimal pelaksanaannya sudah sesuai dengan ketentuanPasal 151 Undang-Undang Republik Indonesia Nomor 13 Tahun 2003 tentang Ketenagakerjaan, yaitu sebelum melakukan PHK perusahaan terlebih dahulu melakukan efisiensi dengan memotong gaji karyawan. Perlindungan Hukum terhadap hak-hak Pekerja Kontrak di SPBU 54.801.01Denpasar, yang terkena Pemutusan Hubungan Kerja (PHK) sebagaiakibat Pandemi Covid-19 belum diperoleh pekerja secaraoptimal, diantaranya hak-hak pekerja berupa uang pesangon tidak diberikan sesuai dengan ketentuan Pasal 156 Ayat (2) Undang-Undang Ketenagakerjaan dan uang hak penggantian dan uang penghargaan tidak diberikan saat terjadinya Pemutusan Hubungan Kerja (PHK).
Perindungan Hukum, Pekerja Kontrak, PHK akibat COVID-19
PERSEPSI AKUNTAN PERUSAHAAN DAN AKUNTAN PUBLIK TERHADAP KONSEP DASAR, PENGUKURAN DAN PENGUNGKAPAN AKUNTANSI LINGKUNGAN
Authors: Ethika Ethika , Marda Widia Gesti 
Published: January 2022

This study aims to empirically examine the differences in perceptions of corporate accountants and public accountants to basic concepts, measurements, and disclosures of environmental accounting. This research was conducted at Public Accounting Firms and Corporate Accountants in West Sumatera. Sampling in this study using the convenience sampling method, in order to obtain a sample of 60. the data analysis technique used to test the hypothesis is the Differential Test (Independent Sample T-test). The results of this study indicate that there is no difference in perceptions between corporate accountants and public accountants on the basic concepts of environmental accounting, environmental accounting measurements, and environmental accounting disclosures. Where both corporate accountants and public accountants have the same perception of the existence of the basic concepts of environmental accounting, environmental accounting measurements, and environmental accounting disclosures are currently inadequate. This research shows that it is necessary to establish as soon as possible special standards on environmental accounting, as a guideline in carrying out environmental accounting practices in companies considering the need for transparency of responsibility for the environment
Keywords: Basic Concepts of Environmental Accounting, Environmental Accounting Measurements, and Environmental Accounting Disclosures.
PENERAPAN E-SYSTEM DALAM KEPATUHAN PAJAK BADAN: MODERASI PEMAHAMAN PERATURAN PERPAJAKAN DAN SANKSI PAJAK
Authors: Hibatulwassi Rhana Sasqia , Ratnawati Vince , Wahyuni Nita 
Published: January 2022

Tax is main income of Indonesia. This study aims to find empirical evidence related to the effect of taxation e-system on corporate taxpayer compliance and the effect of moderation understanding of tax regulations and tax sanctions on corporate taxpayer compliance. The population of this study is corporate taxpayers registered at Pratama Tax Office Bangkinang, amounting to 9,178 corporate taxpayers. The sample of this study was selected using accidental sampling technique, which is a sampling technique where consumers who coincidentally/incidentally meet with the researcher can be used as samples if it is deemed that the person who happened to be met is suitable as a data source. This study use approach for hypothesis testing by using SPSS 26 as statistical program used. The results of this study indicate that implementation of taxation e-system has a positive and significant effect on corporate taxpayer compliance. Meanwhile, the moderating variable such as understanding of tax regulations and tax sanctions has no effect on the implementation of taxation e-system on corporate taxpayer compliance.
Keywords: taxation e-system, understanding of tax regulations, tax sanctions, taxpayer compliance
Get in touch with numbers – an approximate number comparison task in the haptic modality
Authors: Ziegler Marco Carlo , Drewing Knut 
Published: January 2022

AbstractThe Approximate Number System (ANS) is conceptualized as an innate cognitive system that allows humans to perceive numbers of objects or events (>4) in a fuzzy, imprecise manner. The representation of numbers is assumed to be abstract and not bound to a particular sense. In the present study, we test the assumption of a shared cross-sensory system. We investigated approximate number processing in the haptic modality and compared performance to that of the visual modality. We used a dot comparison task (DCT), in which participants compare two dot arrays and decide which one contains more dots. In the haptic DCT, 67 participants had to compare two simultaneously presented dot arrays with the palms of their hands; in the visual DCT, participants inspected and compared dot arrays on a screen. Tested ratios ranged from 2.0 (larger/smaller number) to 1.1. As expected, in both the haptic and the visual DCT responses similarly depended on the ratio of the numbers of dots in the two arrays. However, on an individual level, we found evidence against medium or stronger positive correlations between “ANS acuity” in the visual and haptic DCTs. A regression model furthermore revealed that besides number, spacing-related features of dot patterns (e.g., the pattern’s convex hull) contribute to the percept of numerosity in both modalities. Our results contradict the strong theory of the ANS solely processing number and being independent of a modality. According to our regression and response prediction model, our results rather point towards a modality-specific integration of number and number-related features.
Verification of isotropy postulate under complex kinematic loading of steel 45 along the strain trajectories as semicircles
Authors: Гультяев Вадим Иванович , Зубчанинов Владимир Георгиевич , Алексеев Андрей Алексеевич , Саврасов Иван Александрович 
Published: January 2022

В работе представлены результаты экспериментальной проверки постулата изотропии А.А. Ильюшина при сложном упругопластическом деформировании тонкостенных трубчатых образцов, выполненных из материала сталь 45, по траекториям в виде полуокружностей (жесткое или кинематическое нагружение). Экспериментальные данные получены на автоматизированном расчетно-экспериментальном комплексе СН-ЭВМ. Приводятся и обсуждаются результаты 4 экспериментов, в которых были реализованы траектории деформирования в виде полуокружностей постоянной кривизны 133,3. Экспериментально подтверждается, что для реализованных сложных траекторий постоянной кривизны постулат изотропии выполняется как по скалярным, так и векторным свойствам.
The paper presents the results of experimental verification of A.A. Ilyushin’s postulate of isotropy at complex elastoplastic deformation of thin-walled tubular specimens of steel 45, along the trajectories in the form of semicircles (rigid or kinematic loading). Experimental data have been obtained on the automated testing machine SN-EVM. The results of 4 experiments in which strain trajectories in the form of semicircles of constant curvature 133.3 were realized are presented and discussed. It is experimentally confirmed that for the realized complex trajectories of constant curvature the isotropy postulate is fulfilled both in scalar and vector properties.
Volumetric growth of a composite thick-walled elastic cylinder
Authors: Нестеров Тимофей Константинович , Мурашкин Евгений Валерьевич 
Published: January 2022

В данной работе представлено решение задачи наращивания тела цилиндрической формы. Рассмотрен процесс объемного роста в области наращивания. Решение задачи строится в рамках модели малых упругих деформаций. В рассмотрение введены три конфигурации деформируемого тела: естественная, виртуальная, актуальная. Вычислены распределения перемещений и напряжений возникающих в процессе роста.
This paper presents a solution to the problem of growing a cylindrical solids. The process of volumetric growth in the extension area is considered. The solution of the problem is obtained within the framework of the model of small elastic deformations. Three configurations of a solid are introduced into consideration: natural, virtual, actual. The distributions of displacements and stresses during the process of growth are calculated.
Characteristics of Turbulence Driven by Transient Magnetic Reconnection in the Terrestrial Magnetotail
Authors: Jin Runqing , Zhou Meng , Pang Ye , Deng Xiaohua , Yi Yongyuan 
Published: January 2022

Abstract
This paper investigates the evolution of turbulence within the magnetotail reconnection exhaust observed by the Magnetospheric Multiscale spacecraft. The reconnection was in an unsteady state that caused significant temporal variations in the outflow speed. By dividing the exhaust into nine fast flows, we analyzed and compared the characteristics of turbulence in these nine flows. We find that the strength of the intermittency has a good relationship with the peak speed of the fast flows. The higher-order analysis of magnetic field fluctuations reveals that the turbulence is multifractal in the inertial range for these flows except one with the highest peak speed. Moreover, the turbulence is monofractal on kinetic scales in all of these fast flows. The magnetic energy was intermittently dissipated in these turbulent flows, predominantly occurred in the coherent structures. Since the coherent structures with the largest energy dissipation in these flows are different, we suggest that the mechanism of energy dissipation may be different among these flows.
Magnetic Fields in Star Formation: A Complete Compilation of All the DCF Estimations
Authors: Liu 刘 Junhao 峻豪 , Qiu Keping , Zhang Qizhou 
Published: January 2022

Abstract
The Davis–Chandrasekhar–Fermi (DCF) method provides an indirect way to estimate the magnetic field strength from statistics of magnetic field orientations. We compile all the previous DCF estimations from polarized dust emission observations and recalculate the magnetic field strength of the selected samples with the new DCF correction factors in Liu et al. We find the magnetic field scales with the volume density as B ∝ n
0.57. However, the estimated power-law index of the observed B–n relation has large uncertainties and may not be comparable to the B–n relation of theoretical models. A clear trend of decreasing magnetic viral parameter (i.e., increasing mass-to-flux ratio in units of critical value) with increasing column density is found in the sample, which suggests the magnetic field dominates the gravity at lower densities but cannot compete with the gravity at higher densities. This finding also indicates that the magnetic flux is dissipated at higher column densities due to ambipolar diffusion or magnetic reconnection, and the accumulation of mass at higher densities may be by mass flows along the magnetic field lines. Both sub-Alfvénic and super-Alfvénic states are found in the sample, with the average state being approximately trans-Alfvénic.
Effects of the ϕ Meson on the Properties of Hyperon Stars in the Density-dependent Relativistic Mean Field Model
Authors: Tu Zhong-Hao , Zhou Shan-Gui 
Published: January 2022

Abstract
The effects of the ϕ meson on the properties of hyperon stars are studied systematically in the framework of the density-dependent relativistic mean field (DDRMF) model. The ϕ meson shifts the hyperon threshold to a higher density and reduces the hyperon fractions in neutron star cores. It also strongly stiffens the equation of state calculated with various DDRMF effective interactions and increases the maximum mass of hyperon stars, but only a few effective interactions survive under the constraints from recent astrophysical observations. In the DDRMF model, the conformal limit of the sound velocity is still in strong tension with the fact that the maximum mass of neutron stars obtained in theoretical calculations reaches about 2 M
⊙. Based on different interior composition assumptions, we discuss the possibility of the secondary object of GW190814 as a neutron star. When the ϕ meson is considered, DD-ME2 and DD-MEX support the possibility that the secondary object of GW190814 is a hyperon star rapidly rotating with Kepler frequency.