bluuebunny/crossref_metadata_2025_split huggingface dataset:
KAJIAN PERUBAHAN MANUAL SUPERVISI JALAN DENGAN SPESIFIKASI UMUM 2018 BINA MARGA
Authors: Sowolino Bertho Orbain , Hadi Prayoga Luthfil , Mujahid Zakaria , Santosa Wimpy 
Published: February 2020

Abstract In order to support the acceleration of Indonesia's economic growth, massive infrastructure development must be carried out. The movement of goods and people must be able to run smoothly to accelerate economic growth. One type of infrastructure that can provide direct support is road infrastructure. Roads have an important role in regional development both from economic, social, cultural and environmental aspects. With its flexible nature, it can reach various regions and its development methods are relatively easy, the road being a favorite infrastructure to be developed. To achieve good quality road construction, a general specification must be met. In 2014, the Directorate General of Highways issued the 2010 General Specification (Revision 3) which was completed with the Road Supervision Manual document that referred to the specification. But with the increasing need for quality road construction and increasing awareness of the importance of maintenance activities, in 2018 the Directorate General of Highways issued a General Specification 2018. Therefore, it is necessary to understand the changes of the General Specifications and changes in the Road Supervision Manual. Keywords: infrastructure development, road construction, general spesification, supervision manual Abstrak Untuk mendukung percepatan pertumbuhan ekonomi Indonesia, pembangunan infrastruktur secara masif harus dilakukan. Pergerakan barang dan orang harus dapat berjalan secara lancar untuk mempercepat pertumbuhan ekonomi. Sampai saat ini, salah satu jenis infrastruktur yang dapat memberikan dukungan secara langsung adalah infrastruktur jalan. Jalan memiliki peranan penting dalam pengembangan wilayah, dari aspek-aspek ekonomi, sosial, budaya, dan lingkungan. Dengan sifatnya yang fleksibel, karena dapat menjangkau berbagai daerah dan metode pembangunannya yang relatif mudah, jalan menjadi infrastruktur favorit untuk dikembangkan. Untuk menghasilkan kualitas pembangunan jalan yang baik diperlukan suatu spesifikasi umum yang harus dipenuhi. Pada tahun 2014, Direktorat Jenderal Bina Marga mengeluarkan Spesifikasi Umum 2010 Revisi 3 yang dilengkapi dengan dokumen Manual Supervisi Jalan yang mengacu pada spesifikasi tersebut. Namun, dengan meningkatnya kebutuhan akan kualitas pembangunan jalan serta meningkatnya kesadaran akan pen-tingnya kegiatan pemeliharaan, pada tahun 2018 Direktorat Jenderal Bina Marga mengeluarkan Spesifikasi Umum 2018. Untuk itu, diperlukan pemahaman terhadap perubahan Spesifikasi Umum tersebut dan perubahan Manual Supervisi Jalan. Kata-kata kunci: pembangunan infrastruktur, pembangunan jalan, spesifikasi umum, manual supervisi
PEMANFAATAN APLIKASI SMARTPHONE UNTUK MENGUKUR KEMANTAPAN PERMUKAAN JALAN BERDASARKAN INTERNATIONAL ROUGHNESS INDEX
Authors: Setiawan Arief , Pradani Novita , Masoso Ferra Claudia 
Published: February 2020

Abstract An assessment of road surface conditions is needed to determine an appropriate road evaluation program. One of the parameters used is the International Roughness Index or IRI. Currently, technological developments encourage the use of smartphone applications as a tool to determine the value of IRI. Comparisons between IRIs obtained using tools, such as roughometers, and IRIs obtained from software applications have not been made. The purpose of this study was to analyze the relationship between the results of the measurement of the roughometer and the results of the Android application Roadbump Pro. This research was carried out on the Sam Ratulangi Road in Palu City, with a segment length of 600 meters and analyzed per 100 meters. The results of this study indicate that smartphone applications provide good IRI measurement results, so they can be used in road stability assessments. In addition, the type of survey vehicle did not have a significant effect on IRI measurements. Keywords: smartphone, International Roughness Index, roughometer, Roadbump, road stability Abstrak Penilaian kondisi permukaan jalan diperlukan untuk menentukan program evaluasi jalan yang tepat. Salah satu parameter yang digunakan adalah International Roughness Index atau IRI. Saat ini, perkembangan teknologi mendorong penggunaan aplikasi smartphone sebagai alat bantu untuk menentukan nilai IRI. Perbandingan antara IRI yang diperoleh dengan menggunakan alat bantu, seperti roughometer, dan IRI yang diperoleh dari aplikasi perangkat lunak belum dilakukan. Tujuan penelitian ini adalah menganalisis hubungan antara hasil pengukuran alat roughometer dan hasil aplikasi android Roadbump Pro. Penelitian ini dilakukan di ruas Jalan Sam Ratulangi di Kota Palu, dengan panjang segmen 600 meter dan dianalisis per 100 meter. Hasil penelitian ini menunjukkan bahwa aplikasi smartphone memberikan hasil pengukuran IRI yang baik, sehingga dapat digunakan dalam penilaian kemantapan jalan. Selain itu, jenis kendaraan survei tidak memberikan pengaruh yang signifikan terhadap pengukuran IRI. Kata-kata kunci: smartphone, International Roughness Index, roughometer, Roadbump, kemantapan jalan
Aplikasi Model MapDAS untuk Simulasi Karakteristik Hidrologi DAS Mikro yang Didominasi Perkebunan Sawit
Authors: Pidin Faqihna , Tarigan Suria Darma , Kartiwa Budi 
Published: February 2020

Perubahan penggunaan lahan dalam ekspansi perkebunan berpotensi menyebabkan degradasi tanah, yang dapat menyebabkan kekeringan di musim kemarau dan banjir di musim hujan. Model hidrologi sangat penting untuk mensimulasikan fluktuasi debit dari dampak perubahan penggunaan lahan diperkebunan. Penelitian ini menggunakan Model MAPDAS untuk tujuan simulasinya. Model MAPDAS menggunakan 4 (empat) parameter input utama simulasi, meliputi: koefisien aliran permukaan (Kr), waktu jeda, kecepatan aliran jaringan hidrografi, dan kecepatan aliran lereng. Tujuan dari penelitian adalah untuk, 1) Menguji akurasi hasil hidrograf aliran permukaan pada Model MAPDAS pada metode penentuan hujan efektif; dan 2) melakukan kajian karakteristik hidrologi DAS mikro khususnya aliran permukaan dengan lahan yang didominasi tanaman kelapa sawit menggunakan Model MAPDAS pada 3 skenario penentuan hujan efektif. Hasil penelitian menunjukkan bahwa penggunaan Model MAPDAS dengan input curah hujan berdasarkan metode koefisien runoff (Kr), indeks infiltrasi (F) dan SCS-CN didapat nilai Kr berkisar antara 12%-70%. Model MAPDAS mampu mensimulasikan karakteristik hidrologi dengan baik. Dilihat dari nilai hasil uji CE lebih besar dari 0.7, yang menyatakan bahwa model ini memiliki akurasi yang tinggi sampai sangat tinggi.
Kata kunci: Model MAPDAS, Koefisien aliran permukaan (Kr), Penentuan hujan efektif
Aplikasi Bakteri Endofit dan Mikoriza Terhadap Kandungan Unsur N, P dan K pada Pembibitan Tanaman Lada
Authors: Hazra Fahrizal , Gusmaini Gusmaini , Wijayanti Devi 
Published: February 2020

Aplikasi formula bakteri endofit dan mikoriza diharapkan mampu memperbaiki kualitas pembibitan pada tanaman lada. Penelitian ini bertujuan mengetahui pengaruh formula bakteri endofit dan mikoriza terhadap serapan hara N, P, dan K pada tanah Podsolik Jasinga serta pertumbuhan lada pada fase pembibitan. Metode penelitian menggunakan rancangan acak kelompok (RAK) faktorial yang dikelompokkan berdasarkan ulangan. Formula bakteri endofit jenis (B2), (B3) dan tanpa bakteri (B0) sebagai faktor pertama. Mikoriza dengan tiga taraf yakni tanpa mikoriza (M0), 10 g tanaman-1 (M1) dan 20 g tanaman-1 (M2) sebagai faktor kedua. Perlakuan yang diuji sebanyak 9 kombinasi dan masing-masing perlakuan diulang sebanyak tiga kali, sehingga diperoleh 27 satuan percobaan. Setiap ulangan diwakili 5 tanaman, sehingga terdapat 135 tanaman. Secara umum formula bakteri endofit jenis B2 dan mikoriza 10 g tanaman-1 (M1) lebih baik dalam meningkatkan fase vegetatif tanaman lada.
Kata kunci: Bakteri endofit , mikoriza, tanaman lada.
Analisis Fenomena El Nino dan Dampaknya Terhadap Neraca Air Lahan di Pulau Ambon
Authors: Laimeheriwa Samuel , Pangaribuan Mitha , Amba Martha 
Published: February 2020

El Nino is one of the global phenomena that has affected the climate system of Indonesia, including Ambon Island of Maluku. One of the direct impacts of the El Nino phenomenon is the decrease of water availability on agricultural land. This study aimed: i) to analyze the period of El-Nino extreme rainfall events in Ambon Island as well as the intensity and its frequency; and ii) to analyze the impact of El Nino events on the water balance of agricultural lands on Ambon Island. Sixty years of climatic data period 1959-2018 from Pattimura Meteorological Station and Karang Panjang Geophysics Station were used to analyze extreme rainfall conditions of El Nino, and to calculate the water balance of land using the methods of Thornthwaite and Mather (1957). The results showed that 16 times El Nino events occurred in Ambon between 1959 and 2018, with the frequency of 1-7 times per year or four times per year. The most extreme El Nino events that occurred in Ambon were in 1977, 1987 and 1997. The results of land water balance calculation during the El-Nino events showed seven months water deficit (September to March) which is 62,6% higher than the normal conditions; meanwhile, the optimum soil moisture occurred four months (June to September) or seven months shorter than the normal conditions which were 11 months (March to January).
Keywords: Ambon Island, El Nino, land-water balance

ABSTRAK
El Nino merupakan salah satu fenomena global yang berdampak terhadap sistem iklim di wilayah Indonesia; termasuk wilayah Pulau Ambon Provinsi Maluku. Salah satu dampak langsung fenomena El Nino terhadap sistem pertanian adalah berkurangnya ketersediaan air pada lahan pertanian. Penelitian bertujuan untuk: a) menganalisis tahun-tahun kejadian curah hujan ekstrim El Nino serta intensitas dan frekuensinya di Pulau Ambon; dan b) menganalisis dampak kejadian El Nino terhadap neraca air lahan pertanian di Pulau Ambon. Penelitian ini menggunakan data iklim selama 60 tahun pengamatan periode 1959-2018 dari Stasiun Meteorologi Pattimura Ambon dan Stasiun Geofisika Karang Panjang Ambon. Analisis data iklim dilakukan dengan tahapan sebagai berikut: a) analisis curah hujan pada kondisi ekstrim El Nino; dan b) perhitungan neraca air lahan menggunakan metode Thornthwaite dan Mather (1957). Hasil penelitian menunjukkan bahwa selama periode 1959-2018 kejadian El Nino berlangsung di Pulau Ambon sebanyak 16 kali dengan frekuensi 1-7 tahun sekali atau rata-rata 4 tahun sekali. Tahun-tahun kejadian El Nino di wilayah Pulau Ambon yang paling ekstrim terjadi pada tahun 1977, 1987 dan 1997. Berdasarkan perhitungan neraca air lahan, ketika El-Nino berlangsung defisit air terjadi selama 7 bulan (September sampai dengan Maret); nilainya bertambah sebesar 626% dari kondisi normal, dan kadar air tanah pada kondisi optimum hanya 4 bulan (Juni sampai dengan September) atau lebih pendek 7 bulan dibandingkan kondisi normalnya, yaitu 11 bulan (Maret sampai dengan Januari).
Kata kunci: El Nino, neraca air lahan, Pulau Ambon
ВИБІР СКЛАДУ БУФЕРНОЇ СИСТЕМИ ДЛЯ ОЧНИХ КРАПЕЛЬ З ТЕТРАГІДРОЗОЛІНУ ГІДРОХЛОРИДОМ
Authors: Салій О. О. , Куришко Г. Г. , Горопацька О. О. , Деркач М. В. 
Published: February 2020

The purpose of this article is developing the optimal formulation of excipients for eye drops with tetrahydrosoline hydrochloride and researching of the locally irritating effect of the selected formulation of eye drops. The objects of the research are experimental solutions of eye drops with tetrahydrosoline hydrochloride using different combinations of excipients. Evaluation of test results in the selection of the formulation was performed according to the physico-chemical parameters of the prepared eye drops solution along with researching of stability. Assessment of the local irritation was performed on Chinchilla rabbits, particularly on the mucous membrane of the rabbit’s eye. The optimal formulation of the eye drops with tetrahydrozoline hydrochloride of a medicinal product using citrate buffer solution was developed. The result solution represents a clear homogeneous aqueous solution to physical and chemical properties. The developed formulation contains (in grams): tetrahydrozoline hydrochloride - 0.05; benzalkonium chloride - 0.01; disodium edetate - 0.01; sodium chloride - 0.84; citrate buffer - to a pH of 6.2 to 6.5; injection water - up to 100 ml. Samples of the experimental series of eye drops meet the requirements of HFC on ophthalmic drugs in terms of physico-chemical quality indicators as description, transparency, osmolality, pH of the solution, quantitative content of tetrahydrazoline hydrochloride. The results obtained in the research of stability of the eye drops experimental series throughout a long-term and accelerated storage during 6-months observation indicate the invariance of critical quality indicators, such as description, transparency, pH of the solution and the quantitative content of tetrahydrazoline hydrochloride. The results of determining the locally irritant effect on the mucous membrane of the rabbit’s eye showed that developed formulation of the eye drops does not cause any local irritation, neither visual reaction from the mucous membrane of the eye. The damaging effect level was 0 points in comparison with the other drugs. It is proved that the proposed formulation of eye drops meets the requirements of SPhU, stable and comfortable to use. The results of this experiment have a practical importance for development of new generic drugs.
Визначення розмірних характеристик частинок глинопорошків як нанонаповнювачів полімерних композицій
Authors: Будаш Ю. О. , Ступа В. І. , Лубська М. В. , Пушкаренко К. В. , Силенок І. П. 
Published: February 2020

Comparative morphometric analysis of different types and brands of clay powders of domestic origin for the reasonable choice of filler of polymer nanocomposite materials with improved properties. Morphometric analysis of alumina particles was performed by optical polarization microscopy. Micrographs were obtained using a digital camera with an adapter. To quantify the size of clay particles, we used the image analysis method in ImageJ program. The area, perimeter were determined, and the equivalent diameter and particle shape index were calculated. Statistical processing of the experimental data was performed using the software packages "Statistica" and "Excel". A comparative morphometric analysis of various types and grades of clay powders of domestic origin, intended for use as nanofillers in the production of polymeric composite materials with improved properties, was performed. It was found that the nature of the distribution of particles of equivalent diameter in all the studied samples is qualitatively similar, but has certain differences in quantitative indicators. The distribution of particles of the studied brands of clay powders according to the shape indicator showed a pronounced asymmetry towards its maximum values. On the basis of a detailed morphometric analysis of particles of different types of clay powders, differences in the quantitative characteristics of the particle distribution by the equivalent diameter and shape index were established. The results obtained will allow a reasonable approach to the selection of the brand of clay, which will be used as filler in the production of polymeric nanocomposite materials.
ОПТИМІЗАЦІЯ ЕКСПЛУАТАЦІЙНИХ ВЛАСТИВОСТЕЙ ВОГНЕЗАХИСНОГО ПОЛІМЕРНОГО ІНТУМЕСЦЕНТНОГО ПОКРИТТЯ
Authors: Таран Н. А. , Калафат К. В. , Вахітова Л. І. , Плаван В. П. 
Published: February 2020

Study of the effect of intumescent complex compounds on the basis of aminoderivatives of 2,4,8,10-tetraoxа-3,9-diphosphaspiro[5,5] undecane on the flame retardant properties and water resistance of the ethylene vinyl acetate copolymer in the flame retardant polymer compositions. The structure of intumescent compounds has been confirmed by the methods of elemental analysis and IR spectroscopy, the flame retardant properties of the intumescent systems have been investigated using the method of thermogravimetric analysis. Methods of synthesis of intumescent compounds based on 2,4,8,10-tetraoxа-3,9-diphosphaspiro[5,5]undecane and urea, melamine, dicyandiamidе and mixtures there of have been developed. The synthesized compounds have been shown to enhance the flame retardant properties of the ethylene vinyl acetate copolymer, exhibit an intumescent effect and participate in the construction of a char thermal insulation layer. It has been shown that the water resistance of fire retardant systems with the participation of intumescent complex compounds is much higher than the systems of ammonium polyphosphate / melamine / pentaerythritol composition. The expansion coefficient of intumescent systems containing of intumescent compounds to decrease by 10 - 20% after hydrothermal effects, while, as the expansion coefficient of the traditional intumescent system in the same conditions is reduced by 40%. According to the results of accelerated hydrothermal tests, the stability of polymeric intumescent coatings with the participation of intumescent complex compounds to the action of moisture under conditions of temperature difference was determined. The obtained results indicate the prospect of using the investigated intumescent compounds for the creation of new technologies of intumescent coatings for wood with a long operation life.
SISTEM PERAMALAN MENGGUNAKAN METODE EXPONENTIAL SMOOTHING DAN WEIGHT MOVING AVERAGE DI PERUSAHAAN KONSTRUKSI TELEKOMUNIKASI
Authors: Yunika Sherlia , Sugiono Sugiono 
Published: February 2020

Meramalkan penjualan di perusahaan menjadi kunci untuk mempertahankan tren kompetitif dan memenangkan persaingan. Penelitian ini bertujuan untuk mengembangkan sistem metode peramalan penjualan bahan dengan metode Exponential Smoothing (ES) dan Weight Moving Average (WMA). ES menggunakan rata - rata bergerak dengan meramalkan hasil periode terakhir ditambah porsi perbedaan (Î±). WMA adalah metode perkiraan cara perhitungannya mirip dengan MA, hanya berbeda dalam penambahan bobot pada setiap data. Penelitian ini membandingkan hasil peramalan antara metode ES dan WMA dengan berbagai data referensi penelitian dari Januari 2015 hingga Desember 2015 dan perkiraan Januari 2016 untuk batas jenis barang AC-OF-SM-12-SC. Hasil untuk bulan Januari 2016 metode WMA memprediksi penjualan 904.590,25 dengan tingkat akurasi perkiraan 52,05%, dan metode ES pada 75530,03 dengan tingkat akurasi 89,59%.Â Kata Kunci: Forecasting, Exponential Smoothing (ES), Weight Moving Average (WMA), Sales Material
PENGENDALI VOLUME AIR UNTUK RUMAH KOS BERBASIS ARDUINO
Authors: Yunanda Anton Breva , Darwanto Agus , Sudaryanto Aris 
Published: February 2020

Perangkat pengendali volume air ini menggunakan mikrokontroller arduino mega dan beberapa perangkat elektronik lainnya seperti, rangkaianÂ CatuÂ daya untuk arduino mega dan solenoid valve dengan tegangan keluaran 12 Volt sedangkan untuk relay tegangan keluaran 12 Volt, rangkaian relay digunakan sebagai saklar untuk menutup dan membuka solenoid valve, water flowmeter digunakan untuk pembacaan debit air. Sementara dibagian sistem pengontrolnya menggunakan aplikasi berbasis visual basic 2010. Dengan menggunakan aplikasi kita bisa mengendalikan perangkat pengendali volume air ini, mulai dari mengatur kuota air, memberi tambahan kuota, dan melakukan monitoring. Untuk penghubung antara sistem dan hardware menggunakan kabel data USB dengan komunikasi serial UART TTL.
Early corrosion stage of welded carbon steel joints in CO2-saturated oilfield water
Authors: Lu Yongxin , Xu Lianyong 
Published: February 2020

Abstract
The early corrosion stage of carbon steel welded joints in water occurring in a CO2-saturated oilfield was investigated. Electron backscatter diffraction (EBSD) and energy dispersive X-ray spectrometry (EDS) were used to characterize the microstructure and chemical composition distribution of the different zones in the welded joint. Atomic force microscopy (AFM) and a VEECO optical profiler were used to observe the sample surface corrosion morphology at different immersion times. The results show that the early stage corrosion characteristics of each zone in the welded joint are related to grain orientation and not related to grain size, grain boundary type, or to the second phase. Additionally, it was found that chemical composition distribution is the primary reason for the differences in the early stage corrosion characteristics observed for each zone in the welded joints.
An algebraic-analytic model for the characterization of the frequency domain of photodiodes
Authors: Castañeda-Miranda Alejandro , Castaño Víctor M. 
Published: February 2020

AbstractA design and principle of silicon photodiodes (PD) operation in the frequency domain are presented. To further enhance the signal-to-noise ratio, a methodology is proposed regarding how to cut down the response in the frequency domain between the time constant and stability characteristics. An algebraic-analytic model is developed to obtain the frequency behavior of the PD which are used as semiconductor devices to capture optical modulated light. The proposed model consists of connecting the anode and cathode terminals of a PD, an operational amplifier (AOP) for performing a control over the frequency domain optical device. The basic idea consists in analyzing the response of the PD at different frequencies using Bode, Nyquist and Black diagrams which have been obtained by a transfer function in the frequency domain when the optical response is attenuated. Consequently, a cutoff frequency to be determined by a test signal, and thus allowing for a certain range of frequency capture for operation and application of the PD. This paper highlights several key issues in the measurement methods on frequency domain of the Si PD. In some cases, indirect signal metering of modulated light presents unwanted signals. Consequently, the RC filter responses they are frequency filtering effect. Therefore, for the improved PD measurements, might be necessary the solution in the frequency domain for transfer function and theoretical-experimental relationship on materials testing. The results show that this system has the capacity to acquire the operating range in the frequency domain and thereby calculate the cutoff frequency through the solution of the real and imaginary part of the PD-AOP transfer function model.
Process parameters, development and applications of stir cast composite: A review
Authors: Maurya Manish , Kumar Sudhir , Bajpai Vivek , Kumar Maurya Nagendra 
Published: February 2020

AbstractIn the current environment, aluminum metal matrix composites are in enormous demand due to notable improvement in mechanical and wear characteristics. Several manufacturing techniques have been developed among which traditional stir casting is preferred due to simple processing techniques other than available methods like compocasting, in situ fabrication, powder metallurgy or friction stir processing. Nanoparticles seem appealing to researchers for manufacturing nanocomposites due to their improved microstructural, mechanical and tribological properties. Parameters like weight or volume fraction, stirrer design, number of blades, stirring speed, stirring time, reinforcement feed rate and melting temperature required to prepare a composite are discussed in great detail. The innovation of this assessment effort lie in the fact that few such review works have been published for the stircasting technique to prepare aluminum metal matrix composites/nano composites reinforced with SiC, TiO2, Al2O3, B4C and TiC.