bluuebunny/crossref_metadata_2025_split huggingface dataset:
PEMBENTUKAN CLUSTER OPTIMUM BERDASARKAN METODE HIERARKI DIVISIVE
Authors: Shantika Martha Lidia Karnelia, Dadan Kusnandar, 
Published: December 2020

Analisis cluster merupakan teknik multivariat yang mempunyai tujuan untuk mengelompokkan objek-objek berdasarkan karakteristik yang dimiliki. Prosedur pengelompokan yang digunakan dalam analisis cluster yaitu metode hierarki dan non hierarki. Metode hierarki terdiri dari divisive dan alggomerative. Pembentukan jumlah cluster optimum yang tepat untuk digunakan diperoleh melalui identifikasi pola pergerakan varians pada cluster yang mencapai global optimum. Penemuan posisi cluster yang mencapai global optimum pada pola pergerakan varians diperoleh melalui penerapan metode valley-tracing. Pada penelitian, digunakan penerapan analisis cluster hierarki divisive untuk mengelompokkan 13 desa di Kecamatan Nanga Taman berdasarkan kelompok pendidikan yang ditamatkan tahun 2019. Dari hasil analisis pembentukan cluster optimum pada metode hierarki divisive, diperoleh sebanyak empat cluster. Informasi tersebut akan mempermudah pemerintah Kecamatan Nanga Taman dalam menanggulangi permasalahan pendidikan karena tidak meratanya jumlah penduduk berdasarkan kelompok pendidikan yang ditamatkan. Anggota cluster pertama Desa Nanga Taman tidak memiliki kemiripan dengan desa lainnya, karena jumlah penduduk tamatan sarjana, diploma dan SMA terbanyak. Anggota cluster kedua Desa Nanga Mentukak dan Sungai Lawak, memiliki kemiripan berdasarkan jumlah penduduk tamatan diploma dan pada kelompok pendidikan lainnya tidak jauh berbeda. Anggota cluster ketiga Desa Nanga Koman dan Lubuk Tajau, memiliki kemiripan berdasarkan jumlah penduduk tamatan sarjana dan pada kelompok pendidikan lainnya tidak jauh berbeda. Anggota cluster keempat Desa Rirang Jati, Senangak, Nanga Kiungkang, Tapang Tingang, Nanga Mongko, Nanga Engkulun, Pantok dan Meragun, memiliki kemiripan berdasarkan kelompok pendidikan tidak/belum tamat SD dan tamatan SD. Kata Kunci : Analisis Multivariat, Pendidikan, Global Optimum, Valley-Tracing.
PERAMALAN HARGA EMAS BATANGAN MENGGUNAKAN METODE GREY DOUBLE EXPONENTIAL SMOOTHING
Authors: Nurfitri Imro’ah Ika Novira Zulianti, Shantika Martha, 
Published: December 2020

Grey Double Exponential Smoothing (GDES) merupakan gabungan dari metode grey dan double exponential smoothing yang digunakan untuk melakukan peramalan data deret waktu yang berpola trend dengan keacakan, ketidakteraturan dan keterbatasan informasi data yang ada. Grey accumulated generating operator (r-AGO) yang dapat memuluskan gangguan acak data dimasukkan ke dalam metode double exponential smoothing sehingga kecenderungan pola data dapat dilihat dengan jelas. Hasil peramalan metode GDES diperoleh dengan cara mentransformasikan balik data transformasi r-AGO menggunakan inverse accumulated generating operator (IAGO). Penelitian ini bertujuan meramalkan harga emas batangan pada bulan Januari sampai Juni tahun 2020 menggunakan metode GDES serta mengukur kesalahan peramalan yang dihasilkan metode tersebut. Keakuratan hasil peramalan yang digunakan adalah mean absolute precentage error (MAPE). Dataset yang digunakan pada penelitian ini adalah rata-rata harga emas batangan per gram dari bulan Januari 2016 sampai Desember 2019. Hasil peramalan harga emas yang diperoleh menggunakan metode GDES menunjukkan trend naik setiap bulannya dengan hasil peramalan terendah adalah Rp.755.340,39 pada bulan Januari 2020 dan hasil peramalan tertinggi adalah Rp.763.833,70 pada bulan Juni 2020. Nilai MAPE yang dihasilkan sebesar 1,53% yang berarti bahwa peramalan GDES untuk harga emas batangan termasuk dalam kategori peramalan yang sangat baik. Kata Kunci : peramalan, exponential smoothing, grey, r-AGO, IAGO, MAPE
PENGOPTIMALAN RUTE PENDISTRIBUSIAN TABUNG GAS LPG 3 KG DENGAN ALGORITMA SEQUENTIAL INSERTION (Studi Kasus: Koperasi Pegawai Kantor Gubernur Kalimantan Barat)
Authors: Yudhi Syarifah Ratih Eka Wahyuni, Mariatul Kiftiah, 
Published: December 2020

LPG (Liquid Petrolium Gas) adalah salah satu komoditas sektor migas yang diproduksi oleh PT. Pertamina (Persero). Salah satu permasalahan yang dihadapi Koperasi Pegawai Negeri Kantor Gubernur Kalimantan Barat yaitu mendistribusikan tabung gas LPG dari Stasiun Pengisian Bahan Bakar Elpiji (SPBE) ke setiap pangkalan. Permasalahan rute pendistribusian termasuk dalam Vehicle Routing Problem (VRP) yaitu permasalahan penentuan rute kendaraan untuk melayani beberapa pelanggan. Salah satu variasi VRP yaitu Capacitated Vehicle Routing Problem (CVRP) dimana permasalahan setiap kendaraan yang mempunyai kapasitas terbatas. Variasi ini dapat diselesaikan menggunakan algoritma Sequential Insertion dimana terdapat empat kriteria dalam pemilihan pelanggan pertama yaitu earliest deadline, earliest ready time, shortest time window dan longest travel time. Penyelesaian permasalahan pendistribusian Gas LPG 3 kg di Koperasi Pegawai Negeri Kantor Gubernur Kalimantan Barat dengan algoritma Sequential Insertion memiliki hasil perhitungan dengan total jarak dan waktu tempuh yang berbeda untuk setiap kriteria yaitu untuk kriteria earliest deadline didapat total jarak dan waktu tempuh adalah 280.3 km dan 15.071 jam, Kriteria earliest ready time didapat total jarak dan waktu tempuh 293.66 km dan 15.4055 jam, Kriteria Shortest time window didapat total jarak dan waktu tempuh 276.54 km dan 14.6355 jam dan kriteria longest travel time didapat total jarak dan waktu tempuh 256.16 km dan 14.468 jam. Pada permasalahan ini dalam penentuan pelanggan awal dengan Kriteria longest travel time menghasilkan jarak dan waktu yang lebih optimal sehingga sistem pendistribusian lebih efisien dan juga menghemat biaya dalam penggunaan bahan bakar bensin dan waktu dalam mendistribusikan LPG.Kata Kunci: Vehicle Routing Problem, Capacitated Vehicle Routing Problem, Sequential nsertion
KAJIAN MATRIKS INTERVAL DAN SIFAT-SIFATNYA
Authors: Nilamsari Kusumastuti Epifania Kurva, Evi Noviani, 
Published: December 2020

Misalkan IR menyatakan himpunan semua interval tertutup atas R. Matriks interval merupakan perluasan dari matriks real dengan elemen – elemen pada matriks interval berupa interval di IR. Aritmetika matriks interval merupakan generalisasi dari aritmetika matriks real, dimana operasinya menggunakan aturan-aturan yang berlaku dalam aritmetika interva. Oleh karena itu,terdapat sifat-sifat yang berlaku dalam aritmetika matriks real tapi tidak berlaku dalam aritmetika matriks interval. Sifat-sifat tersebut terkait sifat distributif yang tidak selalu berlaku pada elemen di IR. Kata kunci : matriks, artimetika interval,sifat distributif
Pertumbuhan Stek Batang Sirih Merah (Piper crocatum Ruiz.) Setelah Perendaman Dengan Ekstrak Bawang Merah (Allium cepa L.) Dan Air Kelapa (Cocos nucifera L.)
Authors: Rizalinda Nur Aprilyani Mukarlina 
Published: December 2020

The Red betel (Piper crocatum Ruiz.) is one of the types of plants that can be used as a medicinal plant. The Red betel plant can be propagated through cuttings, but the ability of the Red betel leaves to stem cuttings rooted very low. The purpose of this research is to know the influence of the concentration of soaking onion extract and coconut water towards the growth of the stem cuttings of red betel. This study used a randomized complete design (RAL) factorial with two levels, namely the first factor extract of onion (B) that consists of 4 concentrations, namely control (0%), B1 (2,5%), B2 (4%), and B3 (5.5%). The second factor is cocnut water (K) consisting 0f 4 concentrations of control (0%), K1 (15%), K2 (20%) and K3 (25%), retrieved 16 combination treatments 3 replications to obtain 48 units of the experiment. The results showed that the combination of onion extract 5.5% + 25% coconut water shows most good for the number of leaves, plant height, wet weight of heading, the heading dry weight, root weight of wet and dry weight of roots.
Keanekaragaman Jenis Kantong Semar (Nepenthes spp.) di Kawasan Taman Wisata Alam Baning Kabupaten Sintang Kalimantan Barat
Authors: Mukarlina Anggi Nurhadi Riza Linda 
Published: December 2020

Baning Natural Tourism Site located in Sintang district is the habitat of Nepenthes spp. The aim of the study is to determine the spesies and diversity of Nepenthes spp. in Baning Tourism site. The study was conducted in April - May 2017. Nepenthes spp. observation was done in 5 observation locations which was determined randomly based on the homogeneity of Nepenthes in Baning site with the total number of the observation area of 0.096 Ha. The results showed that there are 5 spesies of Nepenthes in Baning namely Nepenthes ampullaria, N. bicalcarata, N. mirabilis, N. gracilis, and N. x cantleyi. The diversity of Nepenthes spesies in Baning observation areas is to low, with the value of H' ranging from 1,075 to 0.616.
Komposisi Spesies Capung (Odonata) di Kawasan Cagar Alam Mandor Kecamatan Mandor Kabupaten Landak Kalimantan Barat
Authors: Kustiati Ayu Seftia Nur Wulandari, Tri Rima Setyawati, 
Published: December 2020

Dragonfly is one of the predatory insect that can be used as an environmental bio-indicator. Mandor Nature Reserve forest area, which has 3.080 Ha, had changed due to illegal logging and illegal gold mining (PETI) giving a sustainable impact on its flora and fauna. This research aim was to determine the species of dragonfly found in the Mandor Nature Reserve area. The sampling was conducted in one month with the Purposive Random Sampling method. Adult species were collected fortnightly by using sweep nets. There were 182 individuals belonged to 2 suborders, 3 families, 11 genera, and 12 species of dragonflies found in Mandor Nature Reserve area. Two suborders are Zygoptera and Anisoptera, the three families are Coenagrionidae, Gomphidae and Liebellulidae. The most common species found of dragonflies is Cerinorubellum ceriagrion (33 individuals or 18%) and Nannophya pygmaea (29 individuals or 16%), Orthetrum sabina (23 individuals or 13%) and the least common dragonfly is Periagrion microcephallum (4 individuals or 2.16%).
PERTUMBUHAN KEDELAI (Glycine max [L.] Merrill) VARIETAS ANJASMORO DENGAN PEMBERIAN BIOURIN KAMBING (Capra aegagrus hircus)
Authors: Hamid Abd. , Linda Riza , Mukarlina Mukarlina 
Published: December 2020

Soybean (Glycine max [L.] Merrill) Anjasmoro variety is one of the superior soybean varieties widely cultivated in West Kalimantan. The growth of soybean can be increased by applying liquid organic fertilizer namely goat biourine. The purpose of this study was to determine the goat biourine quality and the effect of the application of goat biourine on the growth of Anjasmoro variety soybean plants. This study uses a Completely Randomized Design (CRD) consisting of five treatments, namely without biourine/control, 100 mL/L biourine, 200 mL/L biourine, 300 biourine mL/L and 400 mL/L biourine. Each treatment was repeated 5 times to obtain 25 experimental units. The analysis of goat biourine showed the value of C-Organic 2.03%, pH 4.83, N 0.72%, P 0.004% and K 0.234%. The results showed that apply of goat biourine had a significant effect on plant height, number of leaves, shoot wet of weight, shoot dry of weight, number of branches, number of root nodules and the number of effective root nodules, but it had not a significant effect on root wet of weight and root dry of weight.
INFLUENCE OF ACTIVE ACIDITY OF THE MEDIUM ON THE STABILITY OF MNO NANOPARTICLES
Authors: Блинов Андрей Владимирович , Маглакелидзе Давид Гурамиевич , Кравцов Александр Александрович , Блинова Анастасия Александровна , Гвозденко Алексей Алексеевич , Голик Алексей Борисович , Раффа Владислав Викторович , Коновалова Екатерина Васильевна 
Published: December 2020

В работе впервые представлены результаты исследования микроструктуры наночастиц диоксида марганца, стабилизированных серосодержащими аминокислотами. По результатам сканирующей электронной микроскопии обнаружено наличие в образцах наночастиц диаметром 15 - 30 нм. С помощью спектрофотомерии установлены оптимальные массовые соотношения прекурсоров для получения стабильных золей наночастиц диоксида марганца, которые составляют KMnO: метионин - 1:1 и KMnO: цистеин - 3:1. Исследование влияния активной кислотности среды на стабильность наночастиц диоксида марганца показало, что образцы MnO, полученные с использованием метионина, стабильны при 4 ≤ pH ≤ 11, а с использованием цистеина стабильны при 5 ≤ pH ≤ 8.
In this work, for the first time the results of studying the microstructure of manganese dioxide nanoparticles stabilized with sulfur-containing amino acids are presented. According to the results of scanning electron microscopy, nanoparticles with a diameter of 15 - 30 nm were presented in the samples. The optimal mass ratios of precursors were established by means of spectrophotometry, to obtain stable sols of manganese dioxide nanoparticles. The optimal mass ratios were: KMnO : methionine - 1:1 and KMnO : cysteine - 3:1. Investigation of the effect of the medium active acidity on the stability of manganese dioxide nanoparticles showed that MnO samples obtained with methionine are stable at 4 ≤ pH ≤ 11, and with cysteine - at 5 ≤ pH ≤ 8 .
THE SIZE DEPENDENCIES OF PROPERTIES OF MO-W ALLOY OF EQUIATOMIC COMPOSITION
Authors: Крамынин Сергей Петрович 
Published: December 2020

Основываясь на параметрах парного потенциала межатомного взаимодействия Ми-Леннард-Джонса для Mo и W были рассчитаны параметры потенциала для сплава замещения Mo - W эквиатомного состава. Получены размерные зависимости для уравнения состояния, модуля упругости, коэффициента теплового расширения, изобарной теплоемкости, поверхностной энергии и производной поверхностной энергии по температуре. Также получены температурные зависимости коэффициента теплового расширения изобарной теплоемкости для макро- и нанокристаллов сплава Mo - W. Было показано, что температурная зависимость коэффициента теплового объемного расширения для нанокристалла лежит выше, чем зависимость для макрокристалла, также обнаружено, что с уменьшением размера уменьшается модуль упругости, коэффициент теплового объемного расширения возрастает, а удельная поверхностная энергия нанокристалла сплава Mo - W уменьшается.
Based on the parameters of the Mie-Lennard-Jones pair-wised potential of the interatomic interaction for Mo and W , the potential parameters for an equiatomic Mo - W substitution alloy were calculated. Size dependences for the equation of state, modulus of elasticity, coefficient of thermal expansion, isobaric heat capacity, surface energy and surface energy temperature derivative were obtained. Temperature dependencies of coefficient of thermal expansion and isobaric heat capacity for macro- and nano-crystals of Mo - W alloy were also obtained. It was shown that the temperature dependence of the thermal expansion coefficient for a nanocrystal is higher than that for a macrocrystal. It was also found that with a decrease in size, the elastic modulus decreases, the thermal volume expansion coefficient increases, and the specific surface energy of the alloy nanocrystal Mo - W decreases.
CONCENTRATION THRESHOLD IN LINBO:TB CRYSTALS
Authors: Палатников Михаил Николаевич , Сидоров Николай Васильевич , Кадетова Александра Владимировна , Теплякова Наталья Александровна , Макарова Ольга Викторовна 
Published: December 2020

Выращена серия кристаллов ниобата лития, легированных тербием. Исследованы процессы кристаллизации кристаллов LiNbO:Tb ([Tb] = 0,1-2,89 мас.%) и концентрационные зависимости их структурных характеристик. Проведены сравнительные исследования фоторефрактивных свойств кристаллов LiNbO:Tb различного химического состава. В кристаллах LiNbO:Tb обнаружен концентрационный порог вблизи [Tb]~2,2-2,3 мас.%, в области которого наблюдаются аномалии физико-химических, оптических и структурных характеристик.
A series of lithium niobate crystals doped with terbium was grown. Processes of crystallization and concentration dependences of structural characteristics were studied in LiNbO:Tb ([Tb] = 0,1-2,89 wt%) crystals. Comparative studies of the photorefractive properties of crystals LiNbO:Tb of various chemical composition are carried out. A concentration threshold was determined in LiNbO:Tb crystals near [Tb]~ 2.2-2.3 wt%. Anomalies of physic-chemical, optical and structural characteristics are observed in this area.
AB INITIO CALCULATIONS OF THE CRYSTALLINE AND ELECTRONIC STRUCTURE OF 5-7 FLUOROGRAPHENE VARIETIES
Authors: Беленков Максим Евгеньевич , Чернов Владимир Михайлович 
Published: December 2020

Первопринципные расчеты структуры и электронных свойств двух новых полиморфных разновидностей фторографена были выполнены методом теории функционала плотности. Новые слои фторографена могут формироваться при химической адсорбции фтора на поверхности 5 - 7 графеновых слоев. Структура слоя первого типа более деформирована по сравнению со структурой второго типа (деформационные параметры Def = 60,48° и Def = 31,51° ). Энергии сублимации и ширины запрещенных зон составляют 13,85, 14,17 эВ/(CF), и 4,09, 3,32 эВ для CF - L слоев T1, T2 типов соответственно.
First-principle calculations of the structural and electronic properties of two new polymorphic varieties of fluorographene were performed using the density functional theory method. New layers of fluorographene can be formed during chemical adsorption of fluorine on the surface of 5 - 7 graphene layers. The structure of the layer of the first type is more deformed in comparison with the structure of the second type (deformation parameters Def = 60,48 ° and Def = 31,51 °). Sublimation energies and band gaps are 13,85, 14,17 eV/(CF), and 4,09, 3,32 eV for CF-L layers of T1, T 2 types, respectively.
STRUCTURE AND STABILITY OF A TETRAGONAL DIAMOND-LIKE LAYER: FIRST-PRINCIPLE CALCULATIONS
Authors: Грешняков Владимир Андреевич , Беленков Евгений Анатольевич 
Published: December 2020

Методом теории функционала плотности было выполнено теоретическое исследование нового слоевого полиморфа алмаза DL, состоящего из двух полимеризованных тетрагональных графеновых слоев L. Установлено, что новый алмазоподобный слой имеет двумерную тетрагональную решетку с параметром a = b = 0,3822 нм и толщиной 0,1599 нм. Рассчитанные поверхностная плотность и ширина запрещенной зоны этого слоя равны 0,109 мкг/см и 2,63 эВ, соответственно. Новый слой DL должен быть устойчивым, как минимум, до 220 К. Также установлено, что слой DL может быть получен при сильном одноосном сжатии двух графеновых слоев L при давлении 29,6 ГПа.
Using the density functional theory method, a theoretical study of a novel layered DL polymorph of diamond, consisting of two polymerized tetragonal graphene L layers, was performed. It was established that the new diamond-like layer has a two-dimensional tetragonal lattice with the parameter a = b = 0,3822 nm and a thickness of 0,1599 nm. The calculated surface density and band gap of this layer are 0,109 μg/cm and 2,63 eV, respectively. The new DL layer must be stable up to at least 220 K. It was also found that the DL layer can be obtained by strong uniaxial compression of two graphene L layers at a pressure of 29,6 GPa.
COMPARATIVE ANALYSIS OF RESULTS OF NUMERICAL MODELING OF MECHANICAL BEHAVIOR OF GRAPHENE AND SILICENE IN THE FRAMES OF COMMON HARMONIC FIELD
Authors: Журавков Михаил Анатольевич , Нагорный Юрий Евгеньевич , Политаев Дмитрий Николаевич 
Published: December 2020

В статье представлены результаты применения модели общего гармонического поля для численного моделирования механических свойств близких по геометрической форме образцов наноструктур графена и силицена. Проведён расчёт коэффициентов жёсткости элементов для этой модели на основе жёсткостей пары базовых через собственные частоты колебаний трёхузловых фрагментов. Приведены зависимости упругих модулей от линейных размеров. В обоих случаях наблюдается рост модуля продольной упругости с выходом на асимптоту при увеличении длины образца и очень слабая зависимость от его ширины. Коэффициент поперечной деформации уменьшается с ростом ширины. Увеличение длины даёт у графена рост данного показателя, а у силицена - его снижение.
The article presents the results of application of the general harmonic field model for numerical modeling of mechanical properties of samples of graphene and silicene nanostructures similar in geometric form. A calculation of the stiffness coefficients of the elements for this model was made based on the stiffness of a pair of basic ones through the natural frequencies of oscillations of three-node fragments. Dependencies of elastic modules on linear dimensions for examined samples are given. In both cases, there is an increase in the modulus of longitudinal elasticity with an increase in asymptote with an increase in the length of the sample and a very weak dependence on its width. The coefficient of transverse strain decreases as the width increases. Increasing the length gives graphene an increase in this indicator, and in silicene - its decrease.
GENERATION OF INITIAL CONFIGURATIONS OF METAL NANOCLUSTER ISOMERS: ALGORITHMS AND THEIR APPROBATION
Authors: Пуйтов Владимир Владимирович , Талызин Игорь Владимирович , Васильев Сергей Александрович , Самсонов Владимир Михайлович 
Published: December 2020

Разработаны и апробированы алгоритмы генерации начальных конфигураций икосаэдрических, декаэдрических и кубооктаэдрических нанокластеров. Алгоритмы и соответствующие компьютерные программы апробированы на примере изомеров нанокластеров Au. С использованием молекулярной динамики исследованы закономерности термоиндуцированных структурных превращений в наночастицах золота с исходной кубооктаэдрической конфигурацией. Установлено, что плавлению кубооктаэдров предшествует их переход в икосаэдрические изомеры.
Algorithms for generating the initial configurations of icosahedral, decahedral and cuboctahedral nanoclusters have been developed and verified. Algorithms and corresponding computer programs have been approbated on the gold nanocluster isomers. Molecular dynamics was also employed to study the regularities of the thermally induced structural transformations in gold nanoparticles with the initial cuboctahedral configuration. It was found that the melting of cuboctahedra is preceded by their transition into icosahedral isomers.
INVESTIGATION OF SINTERING FEATURES OF CERAMIC MATERIALS BASED ON HYDROXYAPATITE AND ITS SUBSTITUTED FORMS
Authors: Богданова Екатерина Анатольевна , Веретенникова Ирина Андреевна 
Published: December 2020

Порошки стехиометрического и фторзамещенного гидроксиапатита с повышенной активностью к спеканию (температура начала уплотнения составляет 600°С) синтезированы методом осаждения из раствора. Исследованы свойства синтезированных порошков и керамики после обжига. Показано, что введение фторид-ионов позволяет термически стабилизировать фазу апатита до температуры 1000°С, повысить степень дисперсности и площадь удельной поверхности, почти в три раза увеличить микротвердость материала. Сопоставление распределения частиц по размерам в синтезированных порошках и распределения зерен в спеченной керамике подтвердили наследование керамикой наноструктуры исходных порошков.
Stoichiometric and fluorsubstituted hydroxyapatite powders with increased sintering activity (the initial compaction temperature is 600°C) were synthesized by precipitation from solutions. Properties of synthesized powders and ceramics after firing were investigated. It is shown that the introduction of fluoride ions can thermally stabilize the apatite phase to a temperature of 1000 °C, increase the degree of dispersion and the specific surface area, and almost three times increase the microhardness of the material. Comparison of the particle size distribution in synthesized powders and the grain distribution in sintered ceramics confirmed that ceramics inherited the nanostructure of the original powders.