bluuebunny/crossref_metadata_2025 huggingface dataset:
The Capability of Mangrove Charcoal in Adsorption Process of Indigosol Substance in Wastewater of Batik Industry
Authors: Maryudi Maryudi , Salamah Siti , Rahayu Aster
Published: December 2022

The development of the textile industry has had a positive impact on economic growth in Indonesia. Batik is one of the products of the textile industry that is proliferating in Indonesia. Dyes are the main ingredients in the textile and batik industrial process. One of the dyes used is indigosol, and about 15% of the total dyes used will result in industrial liquid waste. The presence of these dyes can damage the water and soil ecosystems. Liquid sewage treatment is needed to minimize the amount of contamination against groundwater and surface water. A standard method used in the handling of liquid waste is by adsorption process with various adsorbents. Commonly used adsorbents are silica gel, activated alumina, zeolite, polymer, and activated carbon. Activated charcoal from mangroves becomes an alternative to natural adsorbents with a large surface area. The ability of activated charcoal as an adsorbent was the focus of this study, both by the activation process by Fe cations and the addition of hydrogen peroxide activators. Characterization using a UV-Vis spectrophotometer is performed to see changes in indigosol concentration during the adsorption process. Results have shown that charcoal with Fe and H2O2 give a better performance on adsorption of indigosol than pure charcoal. Removal of indigosol by charcoal + Fe and H2O2 can reach 51%.
Optimization of Drying Process for Production Red Ginger Granulated Palm Sugar Using Response Surface Methodology
Authors: Handayani Prima Astuti , Dewi Idama Kusuma , Prasetyo Ady
Published: December 2022

Palm sugar is used as a natural sweetener that is added to food and beverages. The nutritional content in palm sugar can be enriched with the addition of antioxidants derived from red ginger (Zingiber officinale var. rubrum). The antioxidant activity of red ginger is 75.61% higher than that of emprit ginger and elephant ginger. The problem that arises during the production process of granulated palm sugar is the drying process that has not considered chemical characteristics, especially water content. The requirement for water content of palm sugar according to SNI 01-3743-1995 is a maximum of 3%. Moisture content is the main parameter that determines the quality of granulated palm sugar to long shelf life. Water content can affect other chemical characteristics such as sucrose, reducing sugar, ash content, calories, protein, fat, and carbohydrates. This optimization is using RSM (Response Surface Methodology) CCD model (Central Composite Design) on Software Statistica 10 with 20 treatments. The independent variables used were time (4-6 hours), material weight (100-300) grams, and material size (10-26 mesh). Data processing with Statistica 10 software resulted in the optimum water content condition of 2.9019%, with the drying process conditions covering 6.68 hours, material weight 368.18 grams, and material size 31.45 mesh. Validation was carried out to test the accuracy of the optimization results from Statistica 10 Software. The validation of the moisture content results obtained a value of 2.9016%, with an error percentage of 0.0003%. The chemical characteristic test was applied to the granulated palm sugar as a result of optimization so that the value of sucrose (96.5967%) was obtained, reducing sugar (6.0434%), ash content (1.8660%), calories (379.93%), protein (2,4268%), fat (0.3972%), and carbohydrates (91,5379%)
Influence of various capping agents on optical properties and stability of MnS nanoparticles
Authors: Pylypko V.G. , Krupko O.V. , Fochuk P.M.
Published: December 2022

Two thiols (L-cysteine and thioglycolic acid) as well as citrate-anion were employed as coordinating reagents to control the MnS nanoparticles nucleation and growth at various pH in aqueous media. The obtained colloids were characterized by means of UV–visible spectroscopy and atomic force microscopy. Mass fraction of elements was estimated by Energy Dispersive X– ray. Effect of the nanoparticles forming ions (Mn2+ and S2-) molar ratio as well as the capping agents nature and content (the ligands coordination number c. n. = 2; 4 and 6) on UV–vis absorbance spectra was studied. It was determined that Mn2+– ions amount and the coordination number of the stabilizers needed for effective capping of the MnS nanoparticles are close in the three studied cases. Possibility of Mn(OH)2 formation as an additional product of S2-- and Mn2+– ions interaction in aqueous medium is discussed.
The phenomenon of electroomic energy conversion in anisotropic electroconductive environments
Authors: Derevianchuk M.Ya. , Ashcheulov A.A. , Lavreniuk D.O.
Published: December 2022

A study was made of the features of electric current transformation by an anisotropic electrically conductive medium characterized by different types of conductivity (p- and n-types) in selected crystallographic directions under ohmic contact conditions. It has been established that in the case of an external sinusoidal electric current flowing through a device based on a rectangular plate of the abovementioned anisotropic material, electric current vortices occur in its bulk. Based on the analysis of the function m (K, α) (case |m| > 1), which determines the transformation coefficient of the device, a conclusion is made about the energy interaction between the bulk of the anisotropic plate and the external medium. Studies have shown that the use of anisotropic electrically conductive bipolar material leads to a significantly higher (m> 1) or lower (m <-1) value of the transformation coefficient m than in the case of unipolar anisotropic electrically conductive materials. The application of the considered method of electric current transformation with the help of the proposed devices, which are based on a plate made of anisotropic electrically conductive material, significantly expands the field of alternative electricity and other related fields of science and technology.
Turquía-Israel y la causa palestina, antes y después del Mavi Marmara. Un ejemplo de desanclaje.
Authors: Dominguez de Olazabal Itxaso
Published: December 2022

El artículo examina con detalle el periodo 2009-2016, el año que precedió y los 6 años que sucedieron al ataque sobre el Mavi Marmara, como un “episodio contencioso”. Lo hace a través de un enfoque inspirado en repertorios que ayuda a considerar de forma sistemática y superpuesta las prácticas mixtas de tanto amistad y cooperación, como de enemistad y conflicto, que Turquía ha desplegado hacia, por una parte, Israel y, por otra, la causa palestina. El objetivo principal es así indagar cuál es la relación entre la relación bilateral entre Turquía e Israel y la postura de Turquía frente a la causa palestina, y en última instancia demostrar que el apoyo de Turquía a la causa palestina está desanclado de la relación Israel-Turquía y viceversa, en contradicción con el discurso oficial turco, así como una gran parte de la literatura.
Las relaciones Turquía-Argelia (2000-2022): ¿débil convergencia nacionalista o sinergia funcional fuerte?
Authors: Bustos García de Castro Rafael
Published: December 2022

Este artículo pretende, más que analizar un episodio particular, examinar la naturaleza de las relaciones básicamente cooperativas que Argelia y Turquía han establecido en los últimos 20 años (2000/2-2022). Se plantean dos hipótesis, la de que esta cooperación es el resultado de una cierta convergencia nacionalista en política exterior, coyuntural y necesariamente débil, o bien que está surgiendo una sinergia funcional fuerte que permitiría rebasar la cooperación casi exclusivamente económica de las últimas décadas. Asimismo, contestamos la pregunta central de este monográfico, sobre qué factores y asuntos han llevado al uso de herramientas más cooperativas entre los dos países.
Biomechanics and traditional use of Raphia matombe rachis in northern Angola
Authors: Lautenschläger Thea , Kempe Andreas , Bunk Katharina , Mawunu Monizi , Neinhuis Christoph
Published: December 2022

The huge rachis of Raphia matombe is intensely used by local people in Northern Angola for the construction of stools, chairs, shelfs, beds, or baskets. This is not only because it is a charming, fast-growing, renewable, and locally abundant material with a high aesthetic value but also due to its extremely light weight structure. Nevertheless, up to now the anatomical and mechanical features of rachises have hardly been studied, although monocotyledonous stem tissues have been the subject of numerous papers. This study presents an analysis of the rachis of Raphia matombe and its material gradients over its whole length and cross-sectional area. The modulus of elasticity increased from the inner towards the outer layers, whereas no clear axial gradient from the base to the apex was found. However, the specific modulus of elasticity increased from the base to the apex in relation to the density, reaching maximum values of 19.0 MPa/kgm-³. Still, the high anatomical and mechanical heterogeneity of the rachis impede quick and easy processing.
High case enterobiasis in school children and potential eggs distribution on the bed
Authors: Sumanto Didik , E Sayono , Meikawati Wulandari , Kristini Tri Dewi , Handoyo Wahyu , Sugiharto Aris
Published: December 2022

Background: Enterobiasis caused by Enterobius vermicularis is a health manifestation of severe concern that needs to be monitored in children because of its recurrence. The cases are relatively frequent in children. The patient will experience discomfort which starts as itching in the perianal area. A decreased quality of life can also occur in children who lose nutrients due to this worm infection. Methods: A cross-sectional study was conducted on 63 elementary school students on the outskirts of a city in Central Java province, Indonesia. Microscopic examination of perianal smear specimens and children's bedding was conducted. Results: The incidence of enterobiasis reached 96.8% of all students under study, while the distribution of worm eggs on children's bedding reached 93.7%. The presence of worm eggs in both was significantly related (p=0.000). The incidence of enterobiasis contributed to the distribution of eggs on the sleeping bed by 49.18% (R2=0.4918) Conclusion: Enterobiasis is a promising threat to children, and needs to be monitored through have regular annual checkups before taking treatment.
Monitoring of evolution of resistance to commercial acaricidal products in Rhipicephalus sanguineus sensu lato (Latreille, 1806) (Acari: Ixodidae) from Goiânia, Goiás State, Brazil
Authors: Freitas Fernandes Fernando de , Bezerra D´Alessandro Walmirton , Nunes Leles Renan
Published: December 2022

The Brown dog tick Rhipicephalus sanguineus is the most reported and geographically widely spread tick in the world, presenting a great medical and veterinary importance, mainly because the ability to transmit various diseases to its hosts, causing great harm to pets, but also risks to public health, due to the transmission of emerging pathogens to humans. In order to monitor the resistance or susceptibility of R. sanguineus to acaricides, and contribute to integrated control measures for this vector, the activity of 14 commercial acaricidal products on larvae from the city of Goiânia, Goiás, Brazil were studied. Although these products are already sold as acaricides, their cost-benefit efficiency has been questioned by dog breeders and kennel owners. R. sanguineus larvae were obtained from engorged females collected in naturally infested urban environments. The susceptibility of the larvae was evaluated by the larval packet test (lpt) method. Bioassays were carried out in quadruplicate, at 27 ± 1oC, RH ≥ 80% and photoperiod of 12 hours. About 50 larvae, from 14 to 21 days of age, were conditioned in filter paper envelopes, impregnated with different concentrations of acaricide products, obtained from dilution of stock solutions. The control group used the same amount of larvae, submitted to envelopes treated only with distilled water. A status of resistance of R. sanguineus larvae to acaricide formulations was evidenced for Cypermethrin, Cypermethrin + Piperoline Butoxide, Deltamethrin, Permethrin (after 24h of exposure), in the dosages recommended by the manufacturing laboratories, as they promoted a mean mortality of only 58.36%, 71.36%, 48.7%, and 64.5% of the submitted larvae, respectively, Amitraz providedof only 78.8 and 88.00% (After 24 and 48 hours of exposure to the acaricide, respectively), characterizing a status of possible development of resistance to this acaricide. The other evaluated products (Dichlorvos + Cypermethrin, Chlorfenvinphos + Dichlorvos + Alkyl + Xylol, Chlorpyrifos + Cypermethrin hi-cis, Fipronil, Chlorpyrifos, Cypermethrin + Chlorpyrifos + Citronellal, and Trichlorfon + Coumaphos + Cyfluthrin; and Diazinon) showed higherindices, configuring the susceptibility status to these acaricide formulations. No significant mortality was found in the control groups. The ideal concentrations to kill R. sanguineus larvae (CL99) referring to products that showed low acaricidal activity were statically calculated and are presented in this study. The present work, confronted with previous studies, ratified the real evolution of resistance to synthetic chemical acaricides in local populations of R. sanguineus.
Approach to numerical simulation of the spatial motions of a gas/liquid medium in a space stage propellant tank in microgravity with account for the hot zone
Authors:   Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Pylypenko O.V. , Nikolayev O.D. ,   Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Bashliy I.D. ,   Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Zavoloka O.M. ,   Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine
Published: December 2022

Space propulsion systems ensure multiple startups and shutdowns of the main liquid-propellant rocket engines in microgravity conditions for spacecraft preset motions and reorientation control. During the passive flight of a space stage (after its main engine shutdown), the liquid propellant in the tanks continues moving by inertia in microgravity and moves as far away from the propellant management device as possible. In this case, the pressurization gas is displaced to the propellant management device, which creates the potential danger of the gas entering the engine inlet in quantities unacceptable for multiple reliable engine restarts. In this regard, the determination of the parameters of fluid movement in propellant tanks under microgravity conditions is a pertinent problem to be solved in the designing of liquid-propellant propulsion systems. This paper presents an approach to the theoretical calculation of the parameters of motion of the gas–liquid system in the propellant tanks of today’s space stages in microgravity conditions. The approach is based on the use of the finite element method, the Volume of Fluid method, and up-to-date computer tools for finite-element analysis (Computer Aided Engineering - CAE systems). A mathematical simulation of the spatial motion of the liquid propellant and the formation of free gas inclusions in passive flight was performed, and the motion parameters and shape of the free liquid surface in the tank and the location of gas inclusions were determined. The liquid motion in a model spherical tank in microgravity conditions was simulated numerically with and without account for the hot zone near the tank head. The motion parameters of the gas-liquid interface in a model cylindrical tank found using the proposed approach are in satisfactory agreement with experimental data. The proposed approach will significantly reduce the extent of experimental testing of space stages under development.
Quantitative estimation of the risk of an increase in the cost of space hardware prototyping
Authors:   Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Alpatov A.P. , Marchenko V.T. ,   Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Sazina N.P. ,   Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine
Published: December 2022

The goal of this work is to develop a methodological approach to quantitative estimation of the risk of an increase in the cost of space hardware prototyping. The paper considers a technology and mathematical models for quantitative estimation of the risk of an increase in the cost of a developmental work on space hardware prototyping. The main cause of the risk of development cost increase is that data used in expected cost estimation are incomplete and inaccurate. The risk level is estimated as the probability of the possible cost of an R&D project exceeding a critical (for the investor) value. The risk estimation technology is constructed on the basis of the Monte Carlo method embedded in a simulation model. The Monte Carlo method is based on an analytico-probabilistic model (a deterministic mathematical model and a probabilistic model with known distribution functions (laws)). The uniqueness, novelty, and technical complexity of space hardware prototypes do not allow one to construct any analytico-probabilistic model. This paper presents a mathematical model equivalent to an analytico-probabilistic one. The paper substantiates the appropriateness of a homomorphic mapping of a possibilistic space of random variables into a probabilistic space; i.e. in this case the proposed model is equivalent to an analytico-probabilistic one. The key component of the simulation model is the mathematical model of the development cost of a space hardware prototype. The cost model is based on a component-by-component analogy for relatively simple components of the space hardware prototype, moving (upward) along the weighted oriented tree graph that models the engineering structure of the space hardware prototype, and fuzzy methods. The proposed methodological approach may be used in the construction of a simulation model for quantitative estimation vc of the risk of a decrease in the efficiency of use of the prototype under development. To do this, it will be sufficient to replace the mathematical model of development cost with a mathematical model of expected efficiency.
Determination of plasma parameters in a jet of a gas-discharge source using an insulated probe system with cylindrical electrodes
Authors:   Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Lazuchenkov D.N.
Published: December 2022

The aim of this work is to develop a procedure for determining the ion dissociation degree and the electron density in a supersonic jet of a gas-discharge source of collisionless plasma from the results of measurements of the current collected by an insulated probe system with transversely oriented cylindrical electrodes. Based on a mathematical model of current collection by an insulated probe system and an asymptotic solution for the probe current in the electron saturation region obtained previously, new computational formulas for plasma parameter determination are derived. It is shown that, in comparison with a single Langmuir probe, an insulated probe system provides more information in diagnosing a jet of a gas-discharge source of laboratory plasma. The effect of the probe to reference electrode current collection area ratio and the probe measurement errors on the plasma parameter determination accuracy is studied numerically. Within the framework of the mathematical model of current collection, an analysis is made of the effect of the geometrical parameters of the insulated probe system on the method error in plasma parameter determination using the asymptotic solution for the probe current in the electron saturation region. For the determination of the ion dissociation degree, optimal values of the insulated probe system’s bias potentials and geometrical parameters (probe to reference electrode area ratio) are found. For the adopted assumptions, the reliability of ion dissociation degree and electron density determination is estimated as a function of the geometrical parameters of the insulated probe system and the probe current and probe potential (relative to the reference electrode) measurement accuracy. The obtained results may be used in the diagnostics of the laboratory plasma of a gas-discharge source with ion acceleration in the electric field of the jet.
Risk Assessment pada Aplikasi Media Edukasi Berbasis Online Edmodo Menggunakan Framework OCTAVE Allegro
Authors: Wicaksono Soetam Rizky , Putro Pandyawan Kusumo Kresno , Chandra Melvin Natalino , Rachmasari Fitria Melati
Published: December 2022

Kemudahan akses bisa menjadi bumerang bagi developer dari situs aplikasi sistem informasi akademis karena dengan ini kemungkinan seseorang dalam melakukan peretasan terhadap situs menjadi lebih tinggi. Karenanya dibutuhkan penakaran risiko atau risk assesment  terhadap situs untuk mampu mengenali dan memahami risiko dalam akses tersebut. Salah satu metode untuk risk assessment yang dianggap baik adalah menggunakan OCTAVE. OCTAVE terkenal memiliki sifat yang subyektif terhadap obyek penelitiannya, selain itu berdasarkan pengalaman pada dokumen OCTAVE, organisasi yang berhasil dalam mengaplikasikan assessment selanjutnya akan berhasil memanfaatkan secara maksimal informasi aktivitas manajemen risiko dan membuat mereka mampu untuk mengantisipasi dan menindaklanjuti berbagai aktivitas yang dapat mempengaruhi manajemen risiko. Pada penelitian ini digunakan aplikasi Edmodo sebagai obyek studi kasus. Edmodo merupakan satu dari berbagai media edukasi terbesar di dunia berbasis online yang memiliki 100 juta member yang terdiri 400.000 sekolah yang bergabung dengan aplikasi ini. Jumlah yang lumayan besar ini memunculkan beberapa risiko yang dapat muncul terkait dengan Edmodo, seperti email resmi yang digunakan untuk daftar bisa disalahgunakan dan diperjualbelikan, lalu di dalam Edmodo juga memiliki 700 juta lebih materi yang digunakan untuk edukasi yang memiliki kemungkinan terjadinya kebocoran materi. Dari proses penelitian, didapatkan hasil pada salah satu worksheet 10 OCTAVE Allegro dengan skor relative risk score 34 yang memiliki arti bahwa obyek yang dilakukan penakaran (assessment) memiliki kepentingan yang cukup tinggi untuk ditindaklanjuti.
PENGELOMPOKAN PENYEBARAN COVID-19 DI KOTA PADANG MENGGUNAKAN ALGORITMA K-MEDOIDS
Authors: Sepri Domi , Fimazid Yuka
Published: December 2022

Covid-19 merupakan penyakit pandemi yang disebabkan oleh virus corona 2 nCoV-2019 yangmenyerang system pernafasan manusia dan telah menyebar ke seluruh dunia. Padang sebagai Ibukota Provinsi di Sumatera Barat juga mendapat penularan dari virus ini sehingga per tanggal 18 Juli 2021 angka kasus Covid-19 telah mencapai 25830 kasus. Data Mining klasterisasi adalah suatu ilmu dalam membuat suatu pengelompokan kategori dari data tertentu yang diharapkan mampu mengkategorikan daerah kelurahan di Kota Padang menjadi beberapa klaster sebagai rekomendasi dalam penanganan penyebaran virus Covid-19 di Kota Padang. Algoritma K-Medoins adalah salah satu algoritma yang bagus dalam mengklasterisasi data tertentu dikarenakan menggunakan metode Partitional Clustering yang ampuh dan telah digunakan dalam penelitian pengklasteran sejenis. Penelitian menggunakan algoritma K-Medoids ini diterapkan menggunakan aplikasi Rapidminer Studio 9.9.002 dengan Sumber data didapatkan dari situs corona.padang.go.id dan menghasilkan 3 klaster dengan masing-masing klaster menghasilkan 51 item, 20 item dan 33 item dari 104 item kelurahan di Kota Padang.
SISTEM INFORMASI PELAYANAN PAJAK KENDARAAN BERBASIS WEB PADA KANTOR SAMSAT BULUKUMBA
Authors: Wahyuni Sri , Akib Faisal , Indriani Ulivia
Published: December 2022

Pelayanan terhadap publik harus memberikan kemudahan dalam tukar-menukar informasi, transaksi, dengan tingkat keamanan yang tinggi. Masalah ini dapat dijumpai pada lingkungan kerja apa saja yang membutuhkan fakor-faktor seperti mobilitas tinggi, keamanan data, ketangguhan terhadap gangguan, kestabilan dan kualitas kerja. Dalam hal ini ada beberapa hal yang membuat petugas pajak kewalahan pada saat melakukan pelayanan terhadap wajib pajak karena pengolahan data yang belum menggunakan sistem yang lebih efektif, untuk melayani satu orang wajib pajak memerlukan waktu yang cukup lama sehingga menyebabkan wajib pajak mengeluh terhadap pelayanan yang kurang efektif. Dan hal tersebut juga menyebabkan penumpukan antrian. Oleh karena itu diperlukannya sebuah sistem berupa aplikasi berbasis web yang mampu mempermudah petugas pajak dalam mengelolah data pajak kendaraan, dan wajib pajak  dalam melakukan pengecekan jumlah pajak kendaraan. Hasil dari penelitian berupa aplikasi website sebagai wadah  bagi petugas pajak dalam melakukan pengelolaan data pajak kendaraan, dan mempermudah  petugas pajak dalam melakukan proses pelayanan pajak kendaraan.
Implementasi Algoritma Dempster-Shafer Theory Pada Sistem Pakar Diagnosa Penyakit Psikologis Gangguan Kontrol Impuls
Authors: Fernando Yusra , Napianto Riduwan , Borman Rohmat Indra
Published: December 2022

Gangguan kontrol impuls merupakan penyakit gangguan mental yang berkaitan dengan kesulitan untuk mengontrol emosinya maupun perilakunya. Gangguan kontrol impuls dianggap berbahaya karena penderitanya akan menglami kondisi dengan suasana hati yang emosional mapupun mudah tersinggung. Orang yang mengidap gangguan kontrol impuls memerlukan terapi khusus dan penanganan oleh psikolog ataupun psikiater. Penelitian ini bertujuan untuk mengimplementasikan algoritma Dempster-Shafer theory pada diagnosa penyakit psikologis gangguan kontrol impuls. Pendekatan Dempster-Shafer theory menitikberatkan pada proses pemberian tingkat keyakinan berdasarkan kombinasi antar bukti-bukti untuk memperkuat peluang. Sistem yang dikembangkan berbasis web agar memudahkan pasien atau pengguna untuk melakukan diagnosa. Sistem pakar yang dikembangkan dapat melakukan diagnosa berdasarkan gejala yang dialami oleh pengguna dan menghasilkan diagnosa serta penjelasan mengenai penyakit tersebut, penyebab dan cara penganannya. Hasil uji akurasi dengan membandingkan hasil diagnosis sistem pakar dengan seorang pakar, memperlihatkan nilai akurasi sebesar 85%. Ini artinya algoritma Dempster-Shafer dapat berjalan dengan baik pada kasus diagnosa penyakit psikologis gangguan kontrol impuls.
Sistem Pendukung Keputusan Pemilihan Vendor IT Menggunakan Metode Perbandingan Eksponensial (MPE)
Authors: Rusliyawati Rusliyawati , Nuraini Rini
Published: December 2022

Perusahaan dalam pengembangan teknologi informasi akan membutuhkan bantuan vendor Information Technology (IT). Pemilihan vendor merupakan suatu hal yang penting dalam perusahaan atau organisasi. Untuk memilih vendor yang tepat, biasanya melalui pengumpulan data dan informasi mengenai vendor tersebut, kemudian dilanjutkan dengan membahas kelebihan dan kekurangan masing-masing vendor yang potensial. Tetapi metode ini memakan waktu dan kurang objektif. Penelitian ini memiliki tujuan untuk mengembangkan sistem pendukung keputusan dalam memilih vendor IT dengan metode MPE berbasis website agar memudahkan pengambilan keputusan dalam menentukan vendor IT yang sesuai dengan kebutuhan. Sistem Pendukung Keputusan (SPK) yang dikembangkan berbasis website yang mempunyai fasilitas diantaranya dapat melakukan pengelolaan data kriteria, bobot, alternatif, penilaian alternatif, proses perhitungan MPE dan daftar hasil kinerja vendor. Dari hasil uji black-box testing memperlihatkan bahwasanya sistem yang dikembangkan telah berjalan dengan baik.
Simulasi dalam Mengoptimalisasikan Penggadaan Barang di Gudang BC 5 HNI Pekanbaru Menggunakan Metode K-Mean Clustering
Authors: Putra Yendi , Mardiati Dini , Saputra Yanto , Yulhan Yulhan
Published: December 2022

Ketersediaan barang dalam suatu toko sangat mempengaruhi terhadap aktifitas penjualan toko tersebut. Pelanggan mempunyai ketertarik pada toko yang memiliki ketersediaan produk sesuai dengan kebutuhan dan keinginan pelanggan. Penelitian bertujuan untuk mengetahui produk apa saja yang paling diminati pelanggan, diminati pelanggan dan kurang di minati pelanggan. Pemilik toko mengetahui stok yang habis atau jenis produk yang banyak teresedia. Penelitian ini menggunakan metode K-Mean Clustering yang merupakan bagian dari Data Mining. Data yang dioleah pada penelitian ini ialah data penjualan dari Januari 2021 hingga Desember 2021 sebanyak 153 produk yang di ambil dari BC 5 HNI Pekanbaru. Adapun variabel data yang digunakan diantaranya nama produk, harga, jumlah terjual dan tahun. Data tersebut di proses menggunakan aplikasi Rapid Miner. Tahap pertama dalam pengolahan data ialah menentukan nilai cluster secara acak, nilai cluster dibagi menjadi 3 kelompok. Nilai centroid diperoleh dari nilai paling bawah, nilai tengah dan nilai paling atas dari data yang tersedia. Perhitungan cluster dilakukan dengan menghitung jarak terdekat dengan data. Hasil akhir penelitian ini yaitu diketahui produk yang paling diminati, diminati dan kurang diminati, sehingga pemilik toko dapat memaksimalkan ketersediaan barang yang dijual agar tidak adanya penumpukan stok barang.
The impact of entrepreneurship education on entrepreneurial intentions and competencies of students in Moldova
Authors: Vinogradova Natalia , Novac Alexandra , Jáki Erika , Aranyossy Marta
Published: December 2022

This paper focuses on questions of entrepreneurial education's (1) perceived usefulness, (2) effect on developing entrepreneurial competence and (3) potential to increase entrepreneurial intention. The aim of this study is to assess the impact of entrepreneurship education on the development of students' entrepreneurial competences and career plans in the Republic of Moldova. In order to explore this subject, a survey was conducted among young citizens, mainly university students and students of vocational secondary schools, who have studied entrepreneurship-related subjects. The questionnaires were completed by 289 students from 20 educational institutions in the Republic of Moldova. The statistical analysis of their answers allowed conclusions to be drawn about the positive relationship between entrepreneurship education, the development of entrepreneurial competences and the students' entrepreneurial intentions. Entrepreneurial studies are perceived to be useful by students not only in the context of starting a new business, but also for a career as an employee, and even in various social and political situations. Some gender-specific differences were also revealed concerning perceptions of competence development and their usefulness which can be important inputs for further development of entrepreneurship education.
New records and notes on the geographical distribution of the colonial cup coral Coenocyathus bowersi Vaughan, 1906 (Cnidaria, Scleractinia) from northern Chile
Authors: Méndez-Abarca Felipe , Pepe-Victoriano Renzo , A. Mundaca Enrique
Published: December 2022

We present two new records of the colonial cup coral Coenocyathus bowersi Vaughan, 1906 from northern Chile. Colonies were collected off the coastal of Taltal, Antofagasta Region, and off the coast of the city of Iquique, Tarapacá Region, both in northern Chile. Our finds confirm the presence of this species on the Chilean coast and extend the geographic range of this species approximately 765 km north from the only other known occurrences of C. bowersi in Chile.
DETERMINATION OF INHERITANCE RELATIONS AND RESTRUCTURING OF SOFTWARE CLASS MODELS IN THE PROCESS OF DEVELOPING INFORMATION SYSTEMS
Authors: Kungurtsev O. B. , Vytnova A. I.
Published: December 2022

Context. The implementation of different use-cases may be performed by different development teams at different times. This results in a poorly structured code. The problem is exacerbated when developing medium and large projects in a short time.

Objective. Since inheritance is one of the effective ways to structure and improve the quality of code, the aim of the study is to determine possible inheritance relationships for a variety of class models.

Method. It is proposed to select from the entire set of classes representing the class model at a certain design stage, subsets for which a common parent class (in a particular case, an abstract class) is possible. To solve the problem, signs of the generality of classes have been formulated. The mathematical model of the conceptual class has been improved by including information about the responsibilities of the class, its methods and attributes. The connection of each class with the script items for which it is used has been established. A system of data types for class model elements is proposed. Description of class method signatures has been extended. A method for restructuring the class model, which involves 3 stages, has been developed. At the first stage, the proximity coefficients of classes are determined. At the second, subsets of possible child classes are created. At the third stage, an automated transformation of the class structure is performed, considering the identified inheritance relationships.

Results. A software product for conducting experiments to identify possible inheritance relationships depending on the number of classes and the degree of their similarity has been developed. The results of the conducted tests showed the effectiveness of the decisions made.

Conclusions. The method uses an algorithm for forming subsets of classes that can have one parent and an algorithm for automatically creating and converting classes to build a two-level class hierarchy. An experiment showed a threefold reduction in errors in detecting inheritance and a multiple reduction in time in comparison with the existing technology.
SYNTHESIS OF THE SYMBOLOGIES OF MULTICOLOR INTERFERENCE-RESISTANT BAR CODES ON THE BASE OF MULTI-VALUED BCH CODES
Authors: Sulema Ye. S. , Drozdenko L. V. , Dychka A. I.
Published: December 2022

Context. The problem of constructing a set of barcode patterns for multicolor barcodes that are resistant to distortions of one or two elements within each pattern is considered.

Objective. The goal of the work is ensuring the reliability of the reading of multi-color barcode images.

Method. A multicolor barcode pattern has the property of interference immunity if its digital equivalent (vector) is a codeword of a multi-valued (non-binary) correcting code capable to correct errors (distortions of the pattern elements). It is shown that the construction of barcode patterns should be performed on the basis of a multi-valued correcting BCH code capable to correct two errors. A method is proposed for constructing a set of interference-resistant barcode patterns of a given capacity, which ensure reliable reproduction of data when they are read from a carrier. A procedure for encoding data with a multi-valued BCH code based on the generator matrix of the code using operations by the modulo of a prime number has been developed. A new method of constructing the check matrix of the multivalued BCH code based on the vector representation of the elements of the finite field is proposed. A generalized algorithm for generating symbologies of a multi-color barcode with the possibility of correcting double errors in barcode patterns has been developed. The method also makes it possible to build symbology of a given capacity based on shortened BCH codes. A method of reducing the generator and check matrices of a multi-valued full BCH code to obtain a shortened code of a given length is proposed. It is shown that, in addition to correction double errors, multi-valued BCH codes also make it possible to detect errors of higher multiplicity – this property is enhanced when using shortened BCH codes. The method provides for the construction of a family of multicolor noise-immune barcodes.

Results. On the basis of the developed software tools, statistical data were obtained that characterize the ability of multi-valued BCH codes to detect and correct errors, and on their basis to design multi-color interference-resistant bar codes.

Conclusions. The conducted experiments have confirmed the operability of the proposed algorithmic tools and allow to recommend it for use in practice for developing interference-resistant multi-color barcodes in automatic identification systems.
An assessment of a network approach in a project-based organization – a case study of a global engineering service provide
Authors: Nowakowska-Cicio Małgorzata
Published: December 2022

This paper deals with the phenomenon of networks in operations research using the example of a selected organization. The main research objective is to analyse and evaluate the network implications in the sector of global design and engineering service providers. In the course of the research, one representative organization in the sector was subjected to research in accordance with the adopted methodology using structured questionnaires. After a literature review, a model of strategic analysis in a network approach was chosen as a starting point for preparing the methodology. The case study clearly showed that the company cannot be classified as a network organization according to the adopted methodology despite the noted network qualities. Therefore, it is legitimate to indicate severe contradictions in the three areas examined: environment, strategy and organization. Future research could be twofold: related to organizational structures and strategies evolution as well as the incubation of more accurate research methods
State failure in the context of the operations of transnational corporations
Authors: Pilarska Czesława
Published: December 2022

The main purpose of the paper is to discuss issues related to the failure of the state in the context of selected areas of operation of transnational corporations (TNCs). The analysis presented in the paper showed that the state turs out to be ineffective with reference to transnational corporations in many areas of their operation (e.g. tax avoidance by TNCs, the use of their monopolistic position, their negative impact on the natural environment as well as economic sensitivity). The sustainable growth of the global economy requires actions not only in each country but also by international organisations and integrating groupings that could work out certain rules concerning compliance with tax regulations by TNCs and also more effective control over the business of those entities, including control over capital flows on a global scale. The problems discussed in the paper contribute to the main stream of research concerning the role of the state in market economy and the limited effectiveness of the state in exercising control over the operations of transnational corporations
Regulatory decisions in the context of risk and uncertainty
Authors: Szkudlarek Piotr
Published: December 2022

The purpose of the article is to identify the propensity of decision-makers of the regulatory authority on the telecommunications market in Poland (Office of Electronic Communications, OEC) in making decisions under risk and uncertainty conditions and comparing them with a group of non-experts. The research outcomes reveal that decision-makers of the regulatory authority make in most cases decisions that are consistent with the prospect theory. In addition, OEC decision-makers in circumstances of uncertainty, retain the status quo and maintain a lower risk tendency in a decision-making situation with the same expected value but different variance. It was pointed out, at the same time, that their decisions did not differ from those taken by the group of non-experts. The findings presented in the article contribute to the discussion on the propensity of public decision-makers to make decisions under conditions of risk and uncertainty
Visualization of the Image of the Nile: Cultural and Geographical Environment of Nilotic Scenes fromthe Julio-Claudian Period
Authors:   Lobachevsky State University of Nizhny Novgorod, Chistalev Mark Sergeevich
Published: December 2022

This article addresses the problem of the cross-­cultural dialogue between Egypt and Rome on the example of the image of the Nile, visually embodied in the Nilotic scenes. The geographical scope of the research is limited to the territory of Italy, since this region most accurately reflected the Roman perception of Egyptian culture and was least dependent on the historical prejudices of inhabitants of other provinces of the Roman Empire. It is emphasized that the particularity of the Nilotic scenes is that they are based not on a set of predetermined illustrations of the daily life of the Egyptians, but on a stylistic image that unites the themes of the Nile Flood. Simultaneously, the Nilotic scenes under study have several common features. First, there always is an image of the water element, which in most cases is quite accurately identified as a river valley. Second, there is a typical Nilotic flora and fauna. Third, images of river vessels often occur: from single reed shuttles to ships with deck superstructures and a crew of several people. Fourth and finally, the inhabitants of the Nile Valley are represented as dwarfs. The conclusion is that the political component, which was supposed to remind of the events of the late first century BC, was embodied in special ways of artistic expression of Egyptian realities, particularly in the appearance of dwarfs in the Nilotic scenes. In certain cases, the political context could also be highlighted with colour, such as in the frescoes from the cubicula of the House of Livia on the Palatine Hill, where the yellow frame symbolizes the Golden Age and the glory of Augustus, recalling his victory over Egypt. Generally, the given research suggests that, from the reign of the Julio-­Claudians on, the image of the Nile gradually became involved in the process of transformation of the topoi of the Egyptian civilization into symbols of the new Roman imperial culture. Egypt became a part of the Roman world, and the empire accepted and accommodated cultural diversity of the new province.
Amulet Featuring the Image a Holy Rider from the South-Western Crimea
Authors:   Institute of Archaeology of the Crimea of the Russian Academy of Sciences, Khairedinova Elzara Aiderovna
Published: December 2022

The bronze pendant in question in the form of a fine shield was discovered in the south-­western Crimea, in the vicinity of mediaeval Cherson. Its front side depicts a holy rider piercing a demon with a cross; the first words of Psalm 90 (according to the Orthodox Bible numeration) are engraved on the back. The image of a horse-­rider piercing with a spear a daemon laying below the legs of his horse is one of most popular apotropaic scenes. It appeared on amulets in the Late Roman Period and became widespread in the Early Byzantine Period. The rider possibly designated Solomon as the fighter against daemons, or “the only deity who overcomes evil”, or St Sisinios, the fighter against the she-devil Helle, who harmed women during childbirth and babies. On some amulets, the image of the rider is compared with Christ. In the Early Byzantine epigraphy, Psalm 90 with its reputation as a powerful remedy for misfortune was one of the most frequently quoted Biblical texts. Its lines appeared on the window and door jambs, walls of living rooms and graves. According to the shape, iconography of the holy rider, execution style of the image, and features of palaeography and spelling of the inscription, the pendant in question belongs to the group of Byzantine metal magical amulets protecting from every evil, which were produced in the sixth and seventh centuries in the Syrian-­Palestinian region. The Crimean find testifies to the distribution of this type of amulets far beyond the region where they were made. It is possible that the amulet pendant was brought from the holy places by a pilgrim as an eulogia.
The Theme of Bosporos According to Sigillography
Authors:   Ural Federal University, Stepanenko Valerii Pavlovich
Published: December 2022

In 1895 G. Schlumberger published the seal of Arkadios, protospatharios and strategos of Bosporos. In 2008, I. Jordanov published the second find of similar seal found in Preslav. The strategos of Bosporos appeared in the Taktikon of 975, published by N. Oikonomides. According to written sources, Preslav was conquered by Byzantium in 971 and remained under its control as long as 986. According to the Byzantine historian Leo the Deacon, during negotiations with Prince Sviatoslav in 971, the Byzantine Emperor John I Tzimiskes demanded that the Prince of Kiev “should take the pay promised by the emperor Nikephoros <…> and should return to his own territory and the Cimmerian Bosporos.” This way, the establishment of the theme of Bosporos was a consequence of the appearance of the Rus’, before 971, on the shores of the Straits of Bosporos, where the so-called Tmutorokan Principality occurred in a later period. The theme in question existed for a short time. The seal of Leo, imperial spatharios and tourmarches of Gothia, was discovered in the area under study. The second find of this seal originates from Chersonese. The appearance of Leo’s seal indicates the changes in the structure of the Byzantine theme administration in Taurica in the 970s.
Two Examples of the Reconstruction of the Main Defense Line of Mangup Fortress in the Theme Period of Its History
Authors:   V. I. Vernadsky Crimean Federal University, Naumenko Valerii Evgen’evich
Published: December 2022

The Theme Period in the history of Mangup dates from 841 to the mid-eleventh century. For the first time in many years of archaeological researches at the site, recent excavations revealed two major repairs of the defensive structures of the fortress. These works date from the periods far from each other, and namely the mid-ninth century and the late tenth century; therefore, one may assume that the local Byzantine administration permanently paid attention to the defence capacity of the fortress. The mid-ninth century repair, which traces have been documented by the studies of the fortification A.XI in Tabana-dere ravine, occurred as a consequence of the inclusion of Mangup fortress into the Byzantine theme, established in Taurica in no later than 841. There was a significant reconstruction of the original defensive line, which was erected in the final years of Emperor Justinian I (527–565). The late tenth-­century repair was of a larger scale and had an exact date, no later than 994–995. It is mentioned in the building inscription showing the name of Topoteretes Tzoulas, which survived in situ in the masonry of a fortification tower in Tabana-dere ravine. These works resulted in the radical reconstruction of at least two key fortifications at the northern front of the fortress defence, fortifications A.XI and A.XIV located on the slope of Chufut-­Cheargan-­burun promontory. The reconstruction of two important fortifications of Mangup in the late tenth century was not an accident: it fit well into the general context of the military and political history of the Crimea in the period under study. Most likely, it was the case of the purposeful strengthening of Mangup fortress after the establishment of the tourmarchia of Gothia in the mountainous Crimea and as the centre of the military-­administrative unit. In this connection, Topoteretes Tzoulas, mentioned in the 994–995 inscription, who supervised the fortification works, should be considered both the commandant of a remote Byzantine fortress and also an officer of importance, who was directly subordinated to the tourmarches of Gothia, thus following the widespread administrative practice of tenth-­century Byzantium.