bluuebunny/crossref_metadata_2025 huggingface dataset:
NbC-BASED CERMET PRODUCTION COMPARISON: L-PBF ADDITIVE MANUFACTURING VERSUS CONVENTIONAL LPS POWDER METALLURGY
Authors: Miranda Fabio , Dos Santos Marcelo Otavio , Rodrigues Daniel , Coelho Rodrigo Santiago , Batalha Gilmar Ferreira
Published: October 2023

The production of carbide parts (cermet) by additive manufacturing, such as laser powder bed fusion (L-PBF), has been a great challenge due to the complex optimization of process parameters to improve density, porosity, microcracks or abnormal growth of grains and obtain a microstructure as homogeneous as possible. This work aims to compare the evolution of the microstructure when using the conventional route of powder metallurgy, i.e., liquid phase sintering (LPS) with the L-PBF direct additive manufacturing process, considering the NbC-based carbide material. Sample compositions were prepared in w/%, samples were compacted under 50–125 MPa, without polymeric binders, and they were sintered under a vacuum at temperatures of 1330 °C and 1370 °C. For the L-PBF process, a vibrating device made it possible to improve the fluidity of the mixtures of three alloys, NbC–30Co, NbC–30Ni and NbC–30(Co, Ni). The mixtures exhibited low sphericity, low fluidity and compressibility, which were improved with a roller compactor. Thin powder mixture deposition layers were evenly applied and well distributed across the powder bed to avoid defects and cracks during sintering. The L-PBF process parameters varied including a power of 50–125 W and a laser scanning speed of 25–125 mm·s–1. Different microstructures, identified with a light microscope (LM) and a scanning electron microscope (SEM), and properties obtained with the two processes, direct (L–PBF) and indirect sintering (LPS), were compared.
Formation of the causal field of indicators for an organization’s intellectual capital development: A concept and a fuzzy economic and mathematical model
Authors: Zavalin Georgij , Nedoluzhko Olga , Solodukhin Konstantin
Published: October 2023

The development of intellectual capital theory through the introduction of the concept of implicitness involves considering intellectual capital as an implicit factor, so that the process of its formation is largely determined by the impact of specific hidden factors whose impact is expressed implicitly and is difficult to formalize. Currently, the process of selecting explicit and implicit factors affecting intellectual capital is not formalized in domestic and foreign studies, and therein is the relevance of this work. The purpose of this study was to develop a scheme for selecting explicit and implicit factors in the development of the organization’s intellectual capital in conjunction with its strategy based on a modified Balanced Scorecard, taking into account the distribution of indicators by types of cognitive activity. The implementation of this scheme was carried out by developing a fuzzy economic and mathematical model suitable for practical use. The main feature of the model is the possibility of fuzzy setting of “cut-off boundaries” for explicit and implicit factors. We present the results of testing the model on the example of a large regional university. Sets of explicit and implicit factors of the university’s intellectual capital are given for various “cut-off boundaries” using various defuzzification methods.
GFP-YIPF3 Immunoprecipitation V2 v1
Authors: Hickey Kelsey , JW Harper , Sharan Swarup Sharan
Published: October 2023

This is a protocol for the immunoprecipitation of the Golgi protein YIPF3 that is GFP tagged, and probing for ATG8 protein interactions.
Penyelesaian Masalah Transportasi Menggunakan Metode Sumathi-Sathiya dan Metode Pendekatan Karagul-Sahin (KSAM)
Authors: Muhtarulloh Fahrudin , Meirista Meirista , Cahyandari Rini
Published: October 2023

This study discusses solving transportation problems by comparing two different methods for the minimization case, namely the Sumathi-Sathiya method and the Karagul-Sahin Approximation Method (KSAM). The first step is to determine whether the data is balanced or unbalanced. For unbalanced data, dummy rows or columns were added to make the data balanced. The Sumathi-Sathiya method startsby selecting the smallest total of the row and column then allocated the demand according to the available supply. As for KSAM, it starts with the smallest cost of  scope of the ratio of demand, supply, as well as shipping costs  , then selected matrix that has the smallest transportation cost result. Based on simulation of 100 data, the result shows that for 52 data, KSAM is more optimal than the Sumathi-Sathiya Method. As for the other 48 data, the Sumathi-Sathiya Method is more optimal than KSAM, with a number of diverse iterations.Keywords: Karagul Sahin Approximation Method, Sumathi-Sathiya Method, Transportation Problems. AbstrakPenelitian ini membahas tentang penyelesaian masalah transportasi dengan membanding dua metode yang berbeda untuk kasus minimasi yaitu metode Sumathi-Sathiya dan Karagul-Sahin Approximation Method (KSAM) yang bertujuan untuk mengetahui metode mana yang mendapatkan biaya transportasi paling minimum. Langkah pertama yang dilakukan adalah menentukan data seimbang atau tidak seimbang. Untuk data tidak seimbang harus menambahkan baris atau kolom dummy sehingga data menjadi seimbang. Metode Sumathi-Sathiya dimulai dengan memilih total terkecil dari baris dan kolom, kemudian dialokasikan permintaan sesuai dengan persediaan yang tersedia. Sedangkan untuk KSAM, dimulai dengan  cakupan rasio permintaan, persediaan, serta biaya pengiriman terkecil sampai mendapatkan solusi layak awal, kemudian dipilih matriks yang memiliki hasil biaya transportasi terkecil. Berdasarkan simulasi 100 data, diperoleh hasil bahwa untuk 52 data, KSAM lebih optimal dibandingkan Metode Sumathi-Sathiya. Sedangkan untuk 48 data lainnya, Metode Sumathi-Sathiya lebih optimal dibandingkan KSAM, dengan jumlah iterasi beragam.
Uji Optimalitas Menggunakan Metode Stepping Stone untuk Solusi Layak Awal dengan Metode Direct Sum dan New Heuristic Method
Authors: Zahro Aisyah , Wulan Elis Ratna , Awalluddin Asep Solih
Published: October 2023

This research discusses solving the transportation problem of minimization cases using the Direct Sum Method and New Heuristic Method on balanced and unbalanced data to determine an initial feasible solution, which is then tested for its optimality using the Stepping Stone Method. The stages of the Direct Sum Method, then, the largest direct amount cost is selected. Next, the lowest cell and allocate the minimum demand or supply are selected, then the lowest cell is selected again until all demand and supply are met. While the New Heuristic Method stages followed by selecting the lowest cell, and the minimum demand or supply is allocated, then the lowest cell is re-selected until all demand and supply are met. Based on the analysis with the Stepping Stone Method, the Direct Sum Method has more optimal results and has a slight change in allocation compared to the New Heuristic Method.Keywords: Direct Sum Method, Linear Programming, New Heuristic Method, Operations Research, Stepping Stone Method, Transportation Problem.  AbstrakPenelitian ini membahas tentang penyelesaian masalah transportasi kasus minimasi dengan metode Direct Sum dan New Heuristic Method pada data seimbang dan tidak seimbang untuk menentukan solusi layak awal, yang kemudian diuji optimalitasnya dengan metode Stepping Stone. Untuk tahapan penyelesaian menggunakan metode Direct Sum, kemudian dipilih biaya jumlah langsung terbesar.  Selanjutnya, dipilih sel terendah dan dialokasikan permintaan atau persediaan seminimum mungkin, kemudian pilih kembali sel terendah sampai permintaan dan persediaan terpenuhi semua. Sedangkan tahapan penyelesaian menggunakan New Heuristic Method. Selanjutnya dipilih sel terendah dan dialokasikan permintaan atau persediaan seminimum mungkin, kemudian dipilih kembali sel terendah sampai permintaan dan persediaan terpenuhi semua. Berdasarkan analisis yang telah dilakukan pengujian optimalitas dengan metode Stepping Stone, metode Direct Sum memiliki hasil yang lebih optimal dan memiliki perubahan alokasi yang sedikit dibandingkan New Heuristic Method.
Analisis Harga Opsi Beli Tipe Eropa dengan Metode Antithetic Variate dari Monte Carlo
Authors: Kurniawati Nadia Putri , Yundari Yundari , Rizki Setyo Wira
Published: October 2023

Stock options is one of the derivative products of stocks. The purpose of this study is to analyze the price of European type call options using the antithetic variate method from Monte Carlo. The data used is the daily closing price of Apple Inc shares for the period October 1, 2020 to September 30,2021. The steps taken are to determine the parameters used, calculate the stock return value, average, variance and volatility of stock returns, generally data that is normally distributed. Then simulate stock prices using the data that has been generated, calculates the payoff value, the price of the European type of call option and the standard error value. The result shows that for the Monte Carlo method, a call option price of $17,523 in the 50.000th simulation, while the antithetic variate method of Monte Carlo obtained a call option price of $17,387 in the 100th simulation. In other words, the standard error of the antithetic variate method from Monte Carlo is smaller than the Monte Carlo method with the assumption of a minimum standard error of 0,050.Keywords: Monte Carlo Simulation,  Stock Option, Variance Reduction Technique. AbstrakOpsi saham merupakan produk derivatif dari saham sebagai salah satu alternatif investasi. Tujuan dari penelitian ini adalah menganalisis harga opsi beli tipe Eropa menggunakan antithetic variate dari Monte Carlo. Data yang digunakan yaitu harga penutupan saham harian Apple Inc periode 01 Oktober 2020 sampai dengan 30 September 2021. Langkah-langkah yang dilakukan adalah menentukan parameter yang digunakan, menghitung nilai return saham, rata-rata, variansi dan volatilitas dari return saham, membangkitkan data yang berdistribusi normal. Kemudian mensimulasikan harga saham menggunakan data yang telah dibangkitkan, menghitung nilai payoff, harga opsi beli tipe Eropa dan nilai standard error. Berdasarkan hasil perhitungan dengan metode Monte Carlo, diperoleh harga opsi beli sebesar $17,523 pada simulasi ke-50.000, sedangkan metode antithetic variate dari Monte Carlo diperoleh harga opsi beli sebesar $17,387 pada simulasi ke-100. Dengan kata lain, standard error metode antithetic variate dari Monte Carlo lebih kecil dibandingkan metode Monte Carlo dengan asumsi standard error minimumnya sebesar 0,050.
Pembangkitan Pohon Fraktal Bercabang Menggunakan Metode Iterated Function System
Authors: Wulandari Retno , Purnomo Kosala Dwidja , Kamsyakawuni Ahmad
Published: October 2023

The Pythagorean tree is a flat fractal composed of squares. A Pythagorean tree with two branches developed into three components is called a fractal tree. In this article, the author generates a fractal tree that has been expanded to have n branches using the Iterated Function Systems (IFS) method. The fractal tree will be caused by the IFS method using affine transformations, namely dilation, translation, and rotation on a square as the initial geometric object. The generation of a fractal tree begins with determining the basic shape of the branching. The choice of the primary form of branching will affect the body and characteristics of the resulting fractal tree. There are two primary forms of branching to produce a fractal tree that has several variations in the selection of angles: the same angle, a different angle, and a random angle.Keywords: Affine Transformation, Fractal, Fractal Tree, Iterated Function System Method.AbstrakPohon Pythagoras adalah sebuah fraktal datar yang tersusun dari bujur sangkar. Pohon Pythagoras yang memiliki dua percabangan dikembangkan menjadi tiga percabangan disebut dengan istilah pohon fraktal. Pada artikel ini, penulis membangkitkan pohon fraktal yang dikembangkan jumlah cabangnya sampai sebanyak  menggunakan metode Iterated Function Systems (IFS). Pohon fraktal dibangkitkan dengan metode IFS menggunakan transformasi affine yaitu dilatasi, translasi, dan rotasi pada persegi sebagai objek geometri awal. Pembangkitan pohon fraktal dimulai dengan menentukan bentuk dasar percabangan. Pemilihan bentuk dasar percabangan akan berpengaruh pada bentuk dan karakteristik dari pohon fraktal yang dihasilkan. Ada dua macam bentuk dasar percabangan sehingga dapat menghasilkan pohon fraktal yang memiliki beberapa variasi pemilihan sudut yakni sudut sama, sudut berbeda, dan sudut random.
Penerapan Model Tingkat Suku Bunga Cox Ingersoll Ross (CIR) dalam Menentukan Iuran Normal Pensiun
Authors: Limbong Martina Mery Yohanna , Rahmatin Dewi , Priatna Bambang Avip
Published: October 2023

The progress or decline of a company is influenced by the productivity of the workers. The pension program is one of the programs that can guarantee the welfare of employees. This study aims to implement the Cox Ingersoll Ross (CIR) model in approximating interest rates and using them to determine normal pension contributions. In order to be able to describe the actual situation, namely the interest rate which is the basis for determining pension contributions is fluctuating, the CIR model was chosen. The method used in actuarial calculations in this study is the Projected Unit Credit method. Based on the calculations, the Mean Absolute Percentage Error (MAPE) value is 6.45%. This suggests that the pattern of forecasted interest rates and market rates move in much the same way. In addition, the results show that the calculation of normal contributions using the CIR model tends to be larger than using a constant interest rate. The forecast results can help reduce risks in the future.Keywords: Cox Ingersoll Ross (CIR), Normal Cost, Pension, Projected Unit Credit (PUC). AbstrakKemajuan atau kemunduran dari perusahaan dipengaruhi oleh produktivitas para pekerja. Program pensiun merupakan salah satu program yang dapat menjamin kesejahteraan pegawai. Penelitian ini bertujuan mengimplementasikan model Cox Ingersoll Ross (CIR) dalam mengaproksimasi tingkat suku bunga dan menggunakannya dalam menentukan iuran normal pensiun. Supaya dapat menggambarkan keadaan yang sebenarnya, yaitu tingkat suku bunga yang menjadi dasar penentuan iuran pensiun bersifat fluktuatif maka dipilih model CIR. Metode yang digunakan dalam perhitungan aktuaria adalah metode Projected Unit Credit (PUC). Berdasarkan hasil perhitungan, diperoleh nilai Mean Absolut Percentage Error (MAPE) 6,45%. Hal ini menunjukkan bahwa pola perkiraan suku bunga dan suku bunga pasar bergerak dengan cara yang hampir sama. Berdasarkan metode PUC, perhitungan iuran normal dengan model CIR cenderung lebih besar dibandingkan dengan menggunakan tingkat bunga konstan. Hasil perkiraan tersebut dapat membantu mengurangi risiko di masa yang akan datang.
Penerapan Model GBM untuk Prediksi Harga Saham dan Nilai Risiko Kerugian Menggunakan Program R
Authors: Agista Fira , Wijayanti Hagni , Faridhan Yasmin Erika
Published: October 2023

In stock asset investment, the profit earned by an investor is measured by the return value, which is highly dependent on the stock price. In this study, stock price predictions were made using the Geometric Brownian Motion (GBM) model, and loss risk value was calculated using the Monte Carlo Simulation Value at Risk (VaR) method, so that investors can find out future stock prices and possible losses that may be obtained. The data used is the closing price of PT Telkom's shares for the period of 1 March to 12 October 2021. By using R, the results show that the prediction of PT Telkom's stock price for the period of 1 September to 12 October 2021 has a very good accuracy with a MAPE value of 2.1%. The risk value for the period of 6 October to 12 October 2021 with evaluation results through backtesting at violation probability levels of 1% and 5% produces a violation ratio of 0; this means that the Monte Carlo Simulation VaR method can be used at the level of the violation probability.Keywords: Geometric Brownian Motion, Return, Stock, Value at Risk. AbstrakPada investasi aset saham, keuntungan yang diperoleh seorang investor diukur melalui nilai return, yang sangat bergantung pada harga saham. Dalam penelitian ini dilakukan prediksi harga saham menggunakan model Geometric Brownian Motion (GBM) dan nilai risiko kerugian menggunakan metode Value at Risk (VaR) Simulasi Monte Carlo, sehingga investor dapat mengetahui harga saham pada masa yang akan datang dan kemungkinan kerugian yang akan terjadi. Data yang digunakan adalah harga penutupan saham PT Telkom pada periode waktu 1 Maret sampai dengan 12 Oktober 2021. Berbantuan program R, hasil penelitian menunjukkan bahwa prediksi harga saham PT Telkom periode 1 September sampai dengan 12 Oktober 2021 memiliki akurasi yang sangat baik dengan nilai MAPE sebesar 2,1%. Nilai risiko untuk periode 6 Oktober sampai 12 Oktober 2021 dengan hasil evaluasi melalui backtesting pada tingkat peluang pelanggaran 1% dan 5% menghasilkan rasio pelanggaran sebesar 0, yang berarti metode VaR Simulasi Monte Carlo dapat digunakan pada tingkat peluang pelanggaran tersebut.
Estimasi Missing Data dengan Metode Multivariate Imputation by Chained Equations (MICE) untuk Membentuk Persamaan Regresi Linier Berganda
Authors: Eldiyana Irma , Nurlaelah Elah , Herrhyanto Nar
Published: October 2023

Penelitian ini bertujuan untuk menentukan mengestimasi data yang kosong atau data yang hilang (Mising data). Missing data adalah hilangnya sebagian informasi atau sebagian data pada suatu penelitian. Metode yang digunakan untuk mengatasi missing data pada artikel ini Multivariate Imputation by Chained Equation (MICE). Penerapan MICE terdiri dari tiga langkah utama, yaitu imputasi, analisis, dan pooling. Hasil analisis terhadap data sekunder menghasilkan diperlukan lima kali imputasi untuk mengisi missing data. Langkah analisis menggunakan analisis regresi linear berganda, dengan lima model fit. Kemudian pada langkah pooling, ke-lima model fit regresi linear berganda yang dihasilkan digabungkan menjadi model pool. Selanjutnya model pool yang diperoleh dibandingkan dengan model regresi berganda data awal. Hasil perbandingan menunjukkan bahwa persamaan linear berganda dengan missing data yang diestimasi metode MICE mendekati persamaan liner berganda yang disusun dari data awal, dengan demikian estimasi missing data dengan metode MICE dapat dikatakan baik untuk digunakan.
Kriptografi Audio Menggunakan Transposisi dan Affine Cipher yang Dikembangkan dengan Algoritma Blum Blum Shub
Authors: Naufal Muhammad Fakhri , Marwati Rini , Sispiyati Ririn
Published: October 2023

Di era informasi, teknologi berkembang dengan pesat dan kemudahan dalam bertukar informasi menjadi sangat mudah, namun dengan perkembangan tersebut timbul suatu masalah yaitu keamanan informasi tersebut terutama untuk suatu informasi rahasia. Salah satu bentuk informasi seperti file audio memerlukan sebuah mekanisme untuk mengamankan file audio tersebut, salah satunya dengan kriptografi. Teknik kriptografi audio seperti transposisi membuat data audio teracak sehingga suara yang dihasilkan file audio tersebut tidak dapat dipahami. Namun, untuk meningkatkan keamanan nilai data audio pada file audio diperlukan teknik enkripsi substitusi salah satunya yaitu Affine Cipher. Dengan melakukan pengembangan pada Affine Cipher menggunakan pembangkit bilangan acak semu Blum Blum Shub, dapat memberikan peningkatan yang cukup signifikan pada teknik kriptografi klasik ini. Hasil yang diperoleh dengan mengenkripsi file audio WAV menggunakan Python dapat mengamankan file audio sehingga menghasilkan suara acak dan file audio terenkripsi dapat didekripsi untuk mendapatkan informasi asli.
Analisis Faktor-Faktor yang Mempengaruhi Jumlah Kematian Ibu di Provinsi Maluku dengan Menggunakan Regresi Poisson
Authors: Aulele Salmon N. , Heumasse Astrid G. , Lesnussa Yopi Andry
Published: October 2023

The statistical method used to model the relationship between the response variable (Y) and one or more independent variables (X) is regression analysis. Linear regression equations are used to analyze the response variables in the form of continuous random variables and follow a normal distribution, however, many response variables are found that are not normally distributed and are not linear in parameters becausethe mortality rate for mothers and babies always increases from year to year. The number of maternal deaths that occurred in Maluku province is an example of data count. Poisson regression is a nonlinear regression analysis of the Poisson distribution which is generally used in analyzing discrete (count) data. The purpose of this study was to determine the factors that significantly affect maternal mortality in Maluku Province using Poisson Regression, The results of this study indicate that the factors that significantly influence the number of maternal deaths in Maluku Province are the number of health centers and medical personnel in each regency / district. City (X1), the percentage of female population with education that has completed at least SD per Regency / City (X2), the frequency coverage of K4 services for pregnant women in each Regency / City (X3), and the percentage of immunization coverage for pregnant women in each Regency / City (X4).Keywords: Maternal Mortality, Poisson Regression, Regression Analysis. AbstrakMetode statistika yang digunakan untuk memodelkan hubungan antara variabel respons (Y) dengan satu atau lebih variabel bebas (X) adalah analisis regresi. Persamaan regresi linear digunakan untuk menganalisis variabel respons yang berupa peubah acak kontinu dan mengikuti distribusi normal, namun banyak ditemukan variabel respons yang tidak berdistribusi normal dan tidak linear dalam parameter. Jumlah kematian ibu yang terjadi di provinsi Maluku merupakan salah satu contoh data count. Regresi Poisson merupakan analisis regresi nonlinear dari distribusi Poisson yang umumnya digunakan dalam menganalisis data diskrit (count). Tujuan dari penilitian ini adalah untuk mengetahui faktor-faktor yang signifikan mempengaruhi jumlah kematian ibu di Provinsi Maluku dengan menggunakan Regresi Poisson. Hasil penelitian ini menunjukan  bahwa Faktor-faktor yang signifikan mempengaruhi jumlah kematian ibu di Provinsi Maluku adalah jumlah puskesmas dan tenaga medis tiap Kabupaten/Kota (X1), persentase penduduk perempuan dengan pendidikan yang ditamatkan minimal SD tiap Kabupaten/Kota (X2), cakupan frekuensi pelayanan K4 bagi ibu hamil tiap Kabupaten/Kota (X3), dan persentase cakupan imunisasi bagi ibu hamil tiap Kabupaten/Kota (X4).
Hubungan Antara Aljabar-C*A yang Berkaitan dengan Kata-Kata Tak Berdekorasi W pada Graf-K
Authors: Taufiqurrahman Muhammad Nur Hidayat , Rosjanuardi Rizky , Gozali Sumanang Muhtar
Published: October 2023

Isi artikel ini membahas tentang hubungan antara aljabar-  yang berkaitan  dengan koleksi kata-kata tak berdekorasi  . Koleksi kata-kata tak berdekorasi W dipandang sebagai representasi-  dari  . Selanjutnya dibahas juga mengenai aljabar-C∗ yang berkaitan  yang dibangun oleh  dan dipandang sebagai representasi -  dari , serta dikonstruksi suatu pemetaan  yang bersifat isomorfisma.
Kriptografi Visual pada Gambar Berwarna (RGB) Menggunakan Algoritma Elliptic Curve Cryptography
Authors: Zahra Della Annisa , Marwati Rini , Sispiyati Ririn
Published: October 2023

Cryptography held an important role in the digital era for securing data from hackers. As technology develops, types of data that can be secured using cryptography is expanding, one of which is securing images using visual cryptography. Visual cryptography is a cryptosystem that splits an image into parts and can only be solved if it has all parts of the image. Another type of cryptography that can be used to secure data is Elliptic Curve Cryptography (ECC). ECC uses a field of prime numbers consists of points on the elliptic curve as a technique to secure data. In this research, a cryptosystem development was carried out by visual cryptography combined with ECC and its implementation in constructing a computer application program using MATLAB R2014a. Results show that the development of visual cryptography using Elliptic Curve Cryptography can complicate cryptanalysis because it has two algorithms and cannot be hacked if only one share image was obtained. Keywords: Cryptography, Elliptic Curve Cryptography, Visual Cryptography.AbstrakKriptografi berperan penting pada era digital dalam mengamankan data dari peretas. Seiring berkembangnya teknologi, data yang dapat diamankan menggunakan kriptografi semakin luas, salah satunya adalah mengamankan gambar menggunakan kriptografi visual. Kriptografi visual merupakan kriptosistem yang memecah suatu gambar menjadi beberapa bagian dan hanya dapat dipecahkan jika memiliki semua bagian dari gambar tersebut. Jenis kriptografi lain yang dapat digunakan dalam mengamankan data adalah elliptic curve cryptography (ECC). ECC menggunakan suatu lapangan atas bilangan prima yang berisi titik-titik pada kurva eliptik sebagai teknik pengamanan datanya. Dalam penelitian ini dilakukan pengembangan kriptosistem dengan menggabungkan kriptografi visual dan ECC serta implementasinya dalam mengkonstruksi program aplikasi komputer menggunakan MATLAB R2014a. Pengembangan kriptografi visual menggunakan Elliptic Curve Cryptography dapat mempersulit kriptanalisis karena harus meretas dua algoritma dan tidak akan bisa diretas jika hanya memperoleh salah satu share image.
Hasil Cross Product dari Dua Graf-k
Authors: Lestari Rizza , Rosjanuardi Rizky , Gozali Sumanang Muhtar
Published: October 2023

This article discusses results of cross product of two k-graphs. This study discusses the structure of the k-graphs, which consists of category and functor that satisfying the factorisation property. Furthermore, we discussed the crossed product results from two k-graphs, which includes product category and functor for such product category. Then an illustration is given on how to form a (k_1+k_2)-graph from two different k-graphs, namely k_1-graph and k_2-graph.Keywords: Category, Cross Product, Functor, Functor for Product, k-Graph.AbstrakArtikel ini membahas tentang hasil cross product dari dua graf-k. Dalam penelitian ini dibahas mengenai struktur dari graf-k, yang terdiri dari kategori dan fungtor yang memenuhi sifat faktorisasi. Selanjutnya dibahas bagaimana hasil cross product dari dua graf- k, yang mencakup produk kategori dan fungtor untuk produk kategori tersebut. Lalu diberikan ilustrasi bagaimana membentuk graf-(k_1+k_2)dari dua graf-k yang berbeda, yaitu graf-k_1 dan graf-k_2.
Analisis Model Intervensi Multi Input Fungsi Pulse dan Fungsi Step dengan Deteksi Outlier terhadap Harga Saham
Authors: Lorensya Lorensya , Ambarwati Lukita , Mahatma Yudi
Published: October 2023

Intervention is a shock that occurs due to internal and external factors. This study aims to determine the multi-input intervention model of pulse function and step function with the best outlier detection on stock price data and find out the forecasting results. The ARIMA method is used to process data before the occurrence of intervention so that an intervention order (order b, s, r) is formed. The data used in this study is data on the share price of PT Bank Negara Indonesia (Persero) tbk in the period 20 June 2019 – 30 July 2020. We obtained multi-input intervention model of pulse function (b = 8, s = 0, r = 1) and step function (b = 11, s = 0, r = 1) with the addition of eight outliers of additive outlier type and shift level. Based on the model, the results of forecasting the share price of PT Bank Negara Indonesia (Persero) tbk are in the range of 4,500.00 IDRKeywords: Intervention, Outlier, Pulse Function, Step Function.  AbstrakIntervensi merupakan suatu goncangan yang terjadi akibat faktor internal maupun faktor eksternal. Penelitian ini bertujuan untuk menentukan model intervensi multi input fungsi pulse dan fungsi step dengan deteksi outlier terbaik pada data harga saham serta untuk mengetahui hasil peramalannya. Metode ARIMA digunakan untuk mengolah data sebelum terjadinya intervensi sehingga terbentuk orde intervensi (orde b, s, r). Data yang digunakan pada penelitian ini adalah data harga saham PT Bank Negara Indonesia (Persero) Tbk pada periode 20 Juni 2019 - 30 Juli 2020. Diperoleh model intervensi multi input fungsi pulse (b = 8, s = 0, r = 1) dan fungsi step (b = 11, s = 0, r = 1) dengan penambahan delapan outlier bertipe additive outlier dan level shift. Berdasarkan model yang terbentuk, diperoleh hasil peramalan harga saham PT Bank Negara Indonesia (Persero) Tbk berada pada kisaran Rp4.500,00.
Metode Pendekatan Zero Suffix untuk Menentukan Solusi Optimal pada Masalah Penugasan
Authors: Handayani Lestari , Muhtarulloh Fahrudin , Wulan Elis Ratna
Published: October 2023

In this research, the Zero suffix approach method was used to determine the optimal solution to the assignment problem, both minimization and maximization cases. The Zero suffix approach method has a clear calculation and conditioning of the suffix value when there is the same value. This can minimize the error of determining the optimal solution.  Because it has clear and detailed steps, the work can be done manually or using a python programming. The data used consists of secondary data and random data with varying data sizes. The simulation of the secondary d or is done using a python programming and manually.  Both produce the same optimal solution, meaning that python programming can be used for larger cases.  For random data simulation with a fairly large data size, the calculation uses a python programming.  Using python programming is more efficient for working on company data that has a fairly large data size because it saves time and simplifies calculations process to get the optimal solution.Keywords: Approach Zero Suffix Method, Assignment Problem, Optimal Solution, Python Programming.AbstrakPada penelitian ini, metode pendekatan zero suffix digunakan untuk menentukan solusi optimal pada masalah penugasan kasus minimasi dan kasus maksimasi. Metode pendekatan zero suffix ini memiliki perhitungan dan pengkondisian suffix value yang jelas ketika terdapat nilai yang sama sehingga dapat meminimalkan kesalahan penentuan solusi optimal yang dapat dikerjakan secara manual maupun python programming. Karena memiliki langkah yang jelas dan terperinci, pengerjaannya dapat dilakukan secara manual maupun python programming. Data yang digunakan terdiri dari data sekunder dan data random dengan ukuran data yang bervariasi. Pada data sekunder, dikerjakan secara manual dan menggunakan python programing. Dari keduanya mendapatkan solusi optimal yang sama, artinya program python dapat digunakan untuk kasus yang lebih besar, namun pengerjaan secara manual membutuhkan waktu yang lebih lama karena proses pengalokasian dilakukan secara satu – satu dengan mereduksi baris dan kolom. Pada data random, perhitungan menggunakan python programming dengan ukuran data yang cukup besar. Metode pendekatan zero suffix dapat dikerjakan secara manual dan menggunakan Python Programming serta keduanya menghasilkan solusi optimal yang sama. Namun penggunaan python programming akan lebih efektif untuk mengerjakan data perusahaan yang memiliki ukuran data yang cukup besar karena lebih menghemat waktu dan mempermudah perhitungan untuk mendapatkan solusi optimal.
Support for Sustainable Planning
Authors: Primas Bernhard , Gutermuth Georg , Loss Theresa
Published: October 2023

: Intelligent energy management is getting increasingly important for the operation of industrial processes in a globalized world and this trend is expected to continue in the future. This article shows that energy management systems will also be increasingly important for sustainable investment planning such as building or extending a site or plant. Typical investment support methods range from simple spreadsheet-based tools to accurate but resource-intensive simulation studies. However, there is often a need to compare many alternative scenarios quickly to narrow the search space early. Hence, the expectation is not to achieve the level of accuracy of comprehensive studies. Instead, the task is to be as accurate as possible using the limited data available during preliminary frontend engineering and design (preFEED). To address this challenge, a framework was developed that provides more accurate investment decisions by integrating operational aspects in the planning phase. By this, a significant increase in accuracy can be achieved, while obtaining tangible recommendations within acceptabe time. We outline the principal functionality of this framework and share our insights by means of case studies in three different industrial application domains. Finally, we describe the faced challenges and share some lessons learned.
Wie man ein sicheres PROFINET-Gerät entwickelt
Authors: Niemann Karl-Heinz , Walz Andreas , Merklin Simon , Ziegler Dominik , Waldeck Boris
Published: October 2023

Das PROFINET Protokoll wurde in der aktuellen Version um Security-Funktionen erweitert. Damit können für PROFINET flexible Netzwerkarchitekturen mit Security entworfen werden, die durch die bisher erforderliche Netzwerksegmentierung nicht möglich waren. Neben den Herstellern der Protokollstacks sind nachfolgend auch die Komponentenhersteller gefordert, eine sichere Implementierung in ihren Geräten umzusetzen. Die erforderlichen Maßnahmen gehen dabei über die Nutzung eines sicheren Protokollstacks hinaus. Der Beitrag zeigt am Beispiel eines Ethernet-APL Messumformers mit PROFINET-Kommunikation die künftig von PROFINET-Geräteherstellern zu berücksichtigenden technischen und organisatorischen Rahmenbedingungen.
Agricultural Mentality as a Dominant Feature of Ukrainian Nation
Authors:   Uman national university of horticulture, Domoroslyi Valentyn
Published: October 2023

The article details the issue of agricultural mentality of Ukrainians. Mentality is not a consistent way of thinking, it constantly changes under influence of various factors. A nation constantly improves one’s mentality through new perceptions, on the basis of which attitude towards the world is formed. Nation cannot develop if it only concentrates one’s efforts on one direction of its livelihood. It is exemplified by the fact that success of other nations is based on a varied economic activity. It is stated that specificity of Ukrainians lies in the fact that for a long time they were oriented towards development of agriculture as a basis of one’s functioning. This approach had objective reasons: objective – availability of vast lands, suitable for cultivation and subjective – efforts of oppressors to downgrade economic activity of Ukrainians only to agriculture and limit access to handcrafts and trade to slow down the development of our nation. It is established that it led to socio-economic lag of Ukrainians from other nations but also to an economic deformation. Formation of agricultural mentality and its transition to the main feature of Ukrainians was considered and analyzed. It is also indicated that for the purpose of social development it is required to extend Ukrainian mentality.
Exchange as a Form of Sale of Clay Products Potters of the Left Bank of Ukraine in the Second Half of the 19th – at the Beginning of the 20th century
Authors:   National Museum and Preserve of the Ukrainian Pottery (Opishnia, Poltava  Region, Ukraine), Gavrish Larisa
Published: October 2023

The proposed article summarizes scattered material on exchange as one of the forms of selling clay products, used by potters of the Left Bank of Ukraine in the second half of the 19th – and early 20th centuries. Territorially, the study covers the Kharkiv, Chernihiv and Poltava provinces, where the exchange has become the most widespread. The written sources of the outlined period and contemporary ceramologists were studied to identify the necessary information. The analysis of the literature made it possible to draw a conclusion about the dispersion and certain fragmentation of the materials on the researched problem, which determined the purpose of the proposed research. It was found that the dishes were most often exchanged for grain, eggs, vegetables, other foodstuffs, and flax and yarn. The exchange equivalence was influenced by the type of grain for which products were exchanged. It has been proved that the exchange became more widespread in the territories where the land was unproductive or unsuitable for agricultural cultivation, where the potters had little land. It was found out that watered and terracotta products had different terms of exchange. On the basis of the studied sources, it was established that the profitability had a special influence on the exchange equivalence: the lower it was, the less valued earthenware was. The author traced that the exchange became more active after the end of the harvest and before major religious holidays, when the obligatory custom dictated the use of new dishes. It was found out that not only manufacturers resort to exchange as a form of sale, but also intermediaries – buyers. Earthenware was exchanged not only during the delivery of goods in the surrounding territories, but also at fairs and bazaars, in particular at the sub-market. On the basis of studied sources, it was established that potters and buyers actively used the exchange of pottery products in parallel with their sale for cash until the 1880s, and by the beginning of the 20th century, it had almost fallen out of use as a form of sales.
Korunma Motivasyonlarını Etkileyen Faktörler ve Mesaj Çekiciliğinin Rolü: COVID-19 Bağlamında Bir Araştırma
Authors: ASUNAKUTLU Tuncer , AYDIN Ali Emre , KARANFİL Derya , KUVVETLİ Umit , AYDOĞAN Tahsin , DÜZENLİ ÖZTÜRK Seren , YILMAZ Tuğba
Published: October 2023

COVID-19 salgını bağlamında tasarlanan iletişim içeriklerinin, bireylerin korunma motivasyonları

ve davranışları üzerindeki etkisinin tespit edilmeye çalışıldığı bu çalışma, COVID-19 salgınının

olumsuz sonuçlarından kaçınmada bireysel önlemlerin öneminden hareketle, bireylerin korunma motivasyonlarını artırmaya yönelik mekanizmayı anlamayı ve bu mekanizmayı harekete geçirecek iletişim

süreçleri geliştirmeyi amaç edinmiştir. Bu amaç doğrultusunda yürütülen araştırma, iki ayrı çalışmadan

oluşmaktadır. İlk çalışmada, çevrim içi olarak uygulanan anket aracılığıyla bireylerin korunma niyetini

etkileyen motivasyon faktörleri incelenmiştir. İkinci çalışmada ise gruplar arası deneysel tasarımdan

faydalanılarak laboratuvar deneyleri yürütülmüş, korku ve rasyonel çekicilik içerikli mesajların korunma

motivasyonları üzerindeki etkisi ölçülmüştür. Elde edilen bulgular, algılanan şiddet, öz yeterlilik ve dışsal

tepki etkinliğinin korunma niyetiyle pozitif ilişkisini ortaya koymaktadır. Ayrıca korku çekiciliğinin,

rasyonel çekiciliğe kıyasla algılanan şiddet üzerinde daha güçlü bir etkiye sahip olduğu sonucuna ulaşılmıştır.

Bulgular sayesinde halk sağlığı sorunlarıyla mücadeleye ilişkin iletişim süreçlerinin daha etkin kılınması

için öneriler geliştirilmiştir. Bu bakımdan çalışmanın sonuçları, bireylerin korunma motivasyonlarının

artırılmasına ilişkin stratejilere rehberlik edebilecek niteliktedir. Bu bağlamda sonuçlar hem bireylerin hem

de toplumun sağlığı için önemli görülmektedir.
Report on the combat sports-related research at the 27th Annual Congress of the European College of Sport Science
Authors: Escobar-Molina Raquel , Morales José , Franchini Emerson
Published: October 2023

This short report describes the combat sports-related research presented at the 27th Annual Congress of the European College of Sport Science (ECSS), as well as the special session about this topic at the event. The Annual Congress of the ECSS is one of the most important events in the field of Sport Sciences worldwide, bringing together some of the leading researchers in this area. In 2022, it was held in Seville, Spain, from August 30 to September 2. Although combat sports and martial arts have their own specific events and journals, it is important that research conducted on these topics be presented to a broader audience. This presentation can increase awareness among other scientists regarding the relevance of these topics which, in turn, may have a positive impact on obtaining grant for research and positions in universities. Therefore, this report provides a brief overview of the martial arts and combat sports-related investigations presented at this event, along with some strategies to increase their visibility.
Keywords: martial arts, conference, science, education.
Case study in New Jersey on perceptions and concerns during COVID-19: Lessons for safety and health during future work-based learning
Authors: Shendell Derek , Gonzalez Lauren , Kaplun Elizabeth , Aggarwal Juhi , Nguyen Kimberly , Campbell Maryanne
Published: October 2023

Background: The New Jersey Safe Schools Program provides training courses to secondary school educational professionals to supervise students in work-based learning. COVID-19 suspended in-person training courses and work-based learning. As worksites reopened, concerns persisted regarding implementation of work-based learning, and safety and health. After site visits, participants completed reflection assignments. Methods: We examined statewide data from a three-day training, "Designing and Implementing Student Training Plans," from 61 participants in spring-summer 2020 regarding concerns for work-based learning during COVID-19. Qualitative analysis on open-ended responses determined emerging themes through inductive, qualitative coding in Microsoft Office spreadsheet software, Excel, followed by import of a spreadsheet-based code book to NVivo, a qualitative data analysis software tool. Results: Data revealed supervisor perspectives pertaining to re-establishing work-based learning programs (33%), COVID-19 safety and reopening measures (24%), student safety and health (17%), obstacles for in-person work-based learning (9%), future work-based learning placements (7%), and online work-based learning opportunities (4%). Conclusion: Data suggested adaptations for future in-person work-based learning experiences; future online student work placements and safety and health trainings; and insights on improving in-school learning and occupational education for students.
Chemical characterization of Hymenocardia acida stem bark extract and modulation of selected enzymes in Kidney and Heart of Wistar rats
Authors: Adeleke G. E. , Owolabi O. Q. , Berena G. A. , Ajani R. A. , Adeyi R. O. , Orisadiran P. K. , Bello M. A. , Abdulateef R. B. , Olasinde T. T. , Oriaje K. O. , Aransi I. A. , Elaigwu K. O. , Omidoyin O. S. , Shoyinka E. D. , Awoyemi M. B. , Akano M
Published: October 2023

Hymenocardia acida tul leaf and stem bark are used in treatment of several diseases in Africa. We examined the chemical constituents of the stem bark extract and its effects on some antioxidant indices and esterases in Wistar rats. Hymenocardia acida stem bark extract (HASBE) was obtained by Soxhlet extraction using methanol, followed by Atomic Absorption Spectroscopy (AAS), Fourier-Transform Infrared (FT-IR) spectroscopy, ultraviolet (UV) spectroscopy, High-performance liquid chromatography (HPLC) and Gas Chromatography-Flame ionization detection (GC-FID). Forty-eight male Wistar rats were assigned into eight groups (6 rats each), and administered orally with normal saline (Control), 50, 100, 150, 200, 250, 300, 350 mg/kg of HASBE twice per week for eight weeks. The rats were sacrificed under chloroform anesthesia, and kidneys and heart were excised, and processed into homogenates. Superoxide dismutase (SOD), catalase, lipid peroxidation (LPO), glutathione peroxidase (GPx), acetylcholinesterase (AChE) and carboxylesterases (CES) were determined spectrophotometrically. The AAS of HASBE detected Cobalt, Copper, Zinc, Iron, Nickel, Chromium, Manganese and Magnesium. The FT-IR shows four peaks as 2961.4, 2926.0, 1056.7 and 1034.3 cm-1, while UV shows absorbance between 250 nm and 650 nm. The HPLC identified orientin, β-sitosterol, rutin and betulinic acid, while GC-FID identified rutin, orientin, stigmasterol, hymenocardine and homopterocarpin as prominent compounds. The SOD significantly (p < 0.05) reduced in kidneys, while catalase was elevated in kidney and heart, with an increase in LPO level only in heart, relative to controls. The GPx, AChE and CE activities in kidneys were increased by HASBE, whereas, CE activity was lowered in heart. This study has demonstrated that Hymenocardia acida stem bark extract majorly contains iron, nickel, orientin, rutin, stigmasterol, hymenocardine, β-sitosterol, homopterocarpin and betulinic acid, and could possibly modulate the activities of antioxidant and esterase enzymes in kidney and heart of Wistar rats.
Various Methods of Laser Photobiomodulation Therapy for Alzheimer's Disease
Authors: Maksimovich Ivan
Published: October 2023

Alzheimer's disease is the most common neurodegenerative disease. It is believed that the number of people suffering from Alzheimer's disease worldwide is about 32 million, and the number of people with the preclinical stage of the disease can be up to 300 million. For a long time, it was believed that Alzheimer's disease arises as a result of disorders in the metabolism of amyloid beta and tau-protein in cerebral tissue. According to numerous recent studies, it has been established that the disease is accompanied by dyscirculatory angiopathy of Alzheimer's type. This is an Alzheimer's disease-specific complex lesion of the cerebral vascular system with arterial, microcirculatory, and venous bed disorders. One of the most promising directions in the field of brain revascularization, as well as the regeneration of cerebral tissue in Alzheimer's disease, is the use of laser with low output power. This direction was named laser “photobiomodulation therapy”. Currently, laser photobiomodulation therapy is divided into transcranial, intranasal, intravascular (intravenous) and transcatheter intracerebral methods of treatment. Laser energy has a complex effect on cerebral tissues. Photobiomodulation therapy stimulates angiogenesis, causes collateral and capillary revascularization, restores the exchange of adenosine triphosphate in neuronal mitochondria, improves cellular and tissue metabolism, stimulates neurogenesis, and causes regeneration of tissue structures. Various types of Photobiomodulation therapy are non-traumatic, physiological, pathogenetically substantiated, effective methods for the treatment of cerebral microcirculatory disorders in Alzheimer's disease. The choice of one or another method of laser photobiomodulation therapy is purely individual and depends on the specific clinical case.