bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulasi dan Pengkajian Performa Vehicular Ad Hoc Network
Authors: Tonoro Aletheia Anggelia , Wardana Hartanto K. , Nugroho Saptadi
Published: November 2018

Meningkatnya, tingkat kecelakaan dan kemacetan di jalan raya, dan berkembangnya teknologi informasi dengan menggunakan wireless, menghadirkan teknologi Wireless Access for Vehicular Environment (WAVE) sebagai standart komunikasi kendaraan. Salah satu, perkembangan WAVE adalah Vehicular ad hoc networks (VANET). Teknologi VANET memungkinkan sebuah perangkat komunikasi dapat berkomunikasi secara langsung dengan perangkat lain dalam posisi bergerak misalnya mobil. Meskipun VANET dapat membantu menyelesaikan permasalahan lalu lintas seperti kecelakaan, dan kemacetan, tapi untuk membangun infrastruktur jaringan VANET tidaklah mudah dan membutuhkan biaya yang cukup besar. Untuk itu, muncullah network simulator seperti VEINS, SUMO dan OMNET++ yang dapat membantu mensimulasikan jaringan VANET tanpa harus mengeluarkan biaya untuk membangun infrastrukturnya. Karena itu, pada akan dilakukan simulasi jaringan VANET menggunakan VEINS, SUMO dan OMNET++. Dalam pengujian unjuk kerja VANET digunakan 3 jenis routing yaitu Optimized Link State (OLSR), Ad hoc on Demand Distance Vector Routing (AODV) dan Dynamic Manet on Demand (DYMO) dengan delay, throughput dan packet delivery ratio sebagai parameter pengujian.
Analisis Peningkatan Kualitas dan Kapasitas Jaringan Seluler PT. XL Axiata pada Area Jawa Tengah bagian Utara melalui Proyek Swap dan Modernisasi
Authors: Utami Eva Yovita Dwi , Hanika Pravita Ananingtyas
Published: November 2018

Dengan meningkatnya jumlah pelanggan dan permintaan berbagai jenis layanan menuntut ketersediaan coverage, kapasitas dan kualitas jaringan komunikasi bergerak yang handal. Pembangunan Base Tranceiver Station (BTS) diperlukan agar operator mampu mencakup area lebih luas serta menyediakan kapasitas trafik yang mencukupi dan kualitas jaringan yang baik. Namun demikian pembangunan BTS baru seringkali mengalami permasalahan antara lain biaya yang mahal dan membutuhkan waktu yang cukup lama untuk mendapatkan ijin dari pemerintah maupun warga setempat. Proyek swap dan modernisasi di PT. XL Axiata Area Jawa Tengah bagian Utara merupakan sebuah proyek yang akan menukar perangkat 3G yang sebelumnya menggunakan BTS 3900 milik Huawei menjadi RBS 6000 milik Ericsson dan melakukan modernisasi perangkat 2G RBS 2000 menjadi RBS 6000. Dalam makalah ini akan dilaporkan hasil penelitian unjuk kerja jaringan seluler setelah dilakukannya proyek swap dan modernisasi ditinjau dari segi peningkatan kualitas dan kapasitas. Penelitian dilakukan di PT. XL Axiata Area Jawa Tengah bagian Utara pada cluster D5. Hasil penelitian menunjukkan peningkatan kualitas dilihat dari hasil drive test yaitu perbaikan Rx Qual sebesar 23,85%, Ec/N0 sebesar 4,02% dan SQI sebesar 96,38%. Selain itu terdapat penurunan persentase Call Drop Rate (CDR) dan kenaikan persentase Handover Success Rate. Peningkatan kapasitas diperoleh dari penambahan kanal karena adanya perubahan arsitektur hardware, yaitu sebelumnya BTS untuk 2G hanya mempunyai 12 TRX per modul DRU menjadi 24 TRX per modul DRU dan BTS untuk 3G sebelumnya 256 CE per modul WRFU (UL/DL) menjadi 512 CE per modul DUW (UL/DL). Jumlah trafik yang mampu ditangani jaringan setelah adanya proyek swap dan modernisasi meningkat sebesar 34328,21 Erlang untuk 2G dan 36451674 Erlang untuk 3G. Penambahan kapasitas juga menurunkan terjadinya blocked call, yang ditunjukkan dengan berkurangnya TCH Congestion Rate.
Optimalisasi dan Perancangan Algoritma Pergerakan dan Komunikasi pada Robot Penyerang Humanoid Soccer
Authors: Santoso Daniel , Susilo Deddy , Chandra Bob William
Published: November 2018

Robotic Research Centre (R2C) Universitas Kristen Satya Wacana (UKSW) secara rutin mengikuti Kontes Robot Sepakbola Indonesia (KRSBI). Jenis robot yang digunakan adalah humanoid dengan 18 derajat kebebasan dan memiliki kamera sebagai sensor visual. Pengembangan berkelanjutan yang dilakukan oleh R2C telah dapat mengantarkan tim robot sepakbola ini menjadi juara II tingkat nasional pada tahun 2013, meskipun demikian masih ada beberapa masalah mengenai kelincahan manuver dan komunikasi antar – robot. Oleh karena itu pada penelitian ini dilakukukan optimalisasi pada algoritma tracking analisis dan posisi bola, mendekati bola, penentuan orientasi robot, penentuan posisi gawang, menempatkan diri menendang bola, menendang bola, dan komunikasi robot. Pengujian menunjukkan bahwa usaha ini telah dapat meningkatkan respon robot terhadap perpindahan bola, meningkatkan kecepatan dan akurasi dalam mencetak gol, dan membuat robot – robot dalam satu tim dapat berkoordinasi dalam mengejar bola di lapangan.
Perancangan Sistem Modulator Binary Phase Shift Keying
Authors: Susilo Deddy , Murtianta Budihardja , Devina P. Arivia Aurelia
Published: November 2018

Sistem yang dibangun adalah sebuah modul sistem modulator BPSK (Binary Phase Shift Keying). Perangkat yang dibahas adalah modulator BPSK dengan frekuensi 10kHz-48kHz dan untuk transmisi secara nirkabel ditambahkan pemancar FM yang akan mentranslasikan sinyal pembawa pada frekuensi radio sebesar 80MHz. Berdasarkan pengujian yang telah dilakukan, sistem perangkat modulator BPSK yang dibangun dapat bekerja dengan baik. Perancangan pseudorandom generator dengan menanamkan algoritma register geser 5 tingkat dengan mikrokontroler AVR ATTINY13A dapat diatur dengan bit rate bervariasi dari 1200, 2400, 4800 dan 9600 bps. Untai tapis lolos rendah Bessel orde 2 dengan fc 48kHz dapat berfungsi memperhalus hasil keluaran pseudorandom generator dan level shifter. Untai selektor keluaran BPSK dapat berfungsi dengan baik untuk pemilih sinyal sinus 0° dan 180° serta pemancar FM dapat menghasilkan spectrum sinyal paling tinggi pada frekuensi 80MHz.
Palang Pintu Kereta Api Otomatis Berbasis Data Global Positioning System (GPS)
Authors: Setyawan Lukas B. , Dewantoro Gunawan , D. B. Mario Augustino Ivan
Published: November 2018

Sistem pengontrol buka tutup palang pintu pada perlintasan kereta api sangat diperlukan untuk menghindari terjadinya kecelakaan karena kelalaian faktor manusia. Apabila kereta api akan melewati perlintasan kereta api dan mendekati perlintasan dalam jarak sekitar 500m maka palang pintu akan otomatis tertutup. Palang pintu akan kembali terbuka setelah kereta api lewat menjauhi perlintasan. Sistem pengontrol yang diletakkan di gerbong kereta berkomunikasi dengan palang pintu di perlintasan menggunakan frekuensi radio dengan frekuensi 433 MHz. Untuk mengetahui jarak kereta api dengan perlintasan digunakan modul GPS APM 2.5 NEO 6M. Hasil pengujian menunjukkan pada saat kereta api mendekat ke perlintasan dalam jarak 595m palang pintu akan menutup. Setelah kereta api meninggalkan perlintasan dalam jarak 300m maka palang pintu akan membuka.
Sistem Pengendali Mesin Tenun GA615
Authors: Mahardika Dwi Cahyo , Susilo Deddy , Utomo Darmawan
Published: November 2018

Sistem pengendali mesin tenun GA615 ini dibuat dengan tujuan untuk mengganti sistem pengendali yang lama di PT. Panca Bintang Tunggal Sejahtera, karena banyak yang sudah tidak dapat bekerja dengan baik. Sistem yang diusulkan menggunakan mikrokontroler ATMEGA 328P sebagai pengendali utama. Cara kerja sistem adalah menunggu masukan dari operator melalui lima buah tombol yaitu maju, mundur, jogging, start, dan stop. Terdapat dua buah proximity sensor Autonics PR18-5DN untuk menentukan batas depan dan belakang. Tombol masukan dan proximity sensor tersebut diolah dalam sebuah mikrokontroler yang kemudian didapat keluaran untuk menggerakan motor AC tiga fasa sebagai penggerak utama serta rem elektromagnetik sebagai komponen pengereman, melalui relay dan kontaktor. Pengujian sistem yang telah dilakukan sebanyak 30 kali, didapatkan prosentase keberhasilan untuk masing – masing tombol. Untuk tombol maju, mundur, jogging, dan start prosentase keberhasilan 100%. Sedangkan untuk tombol stop prosentase keberhasilan 93.33%, ini disebabkan respon sistem pengereman yang kurang cepat dalam melakukan pengereman saat putaran motor sangat cepat, sehingga saat berhenti masih terlalu maju.
Otomatisasi Mesin Capping Untuk Botol Obat Sirup di PT. Mersifarma Tirmaku Mercusana Sukabumi
Authors: Setyawan Lukas B.
Published: November 2018

Mesin capping digunakan untuk menyegel kemasan botol kaca atau botol plastik dengan tutup berbahan logam. Otomatisasi mesin capping untuk botol obat sirup di PT. Mersifarma Tirmaku Mercusana, Sukabumi, Jawa Barat ini dilakukan untuk meningkatkan kapasitas produksi dan memperkecil jumlah produk gagal pada proses pengemasan sirup (liquid syrup) dan sirup kering (dry syrup). Sistem mesin capping ini menyediakan 4 pilihan ukuran botol, yaitu 60ml, 75ml, 100ml, dan 120ml. Masukan mesin capping ini adalah botol dengan tutup belum tersegel. Sedangkan keluarannya adalah botol telah tersegel. Mesin capping ini untuk ukuran botol 60ml mengalami peningkatan kapasitas produksi sebesar 30% dan produk gagal menurun 79%. Untuk ukuran botol 75ml mengalami peningkatan kapasitas produksi sebesar 30% dan produk gagal menurun 79%. Untuk ukuran botol 100ml mengalami peningkatan kapasitas produksi sebesar 33% dan produk gagal menurun 75%. Untuk ukuran botol 120ml mengalami peningkatan kapasitas produksi sebesar 36% dan produk gagal menurun 77%.
Linear Prediction and Long Term Predictor Analysis and Synthesis
Authors: Yohanes Banu W.
Published: November 2018

Spectral analysis may not provide an accurate description of speech articulation. This article presents an experimental setup of representing speech waveform directly in terms of timevarying parameters. It is related to the transfer function of the vocal tract. Linear Prediction, Long Term Predictor Analysis, and Synthesis filters are designed and implemented, as well as the theory behind introduced. The workflows of the filters are explained by detailed and codes of those filters. Original waveform files are framed with Hamming window and for each frames the filters are applied, and the reconstructed speeches are compared to original waveforms. The results come out that LP and LTP analysis can be used in DSPs due to its periodical characteristic, but some distortion might be coursed, which examined in the experiments.
Pembangkit Pulsa Pemicu Berdasarkan Detektor Persilangan Nol yang Diperoleh dari Analog to Digital Converter dan Interrupt
Authors: Utomo Darmawan
Published: November 2018

Pada makalah ini diusulkan sebuah teknik yang memanfaatkan port dari mikrokontroler sebagai pembangkit pulsa pemicu berdasarkan detektor persilangan nol dengan cara menganalisa transisi nilai-nilai analog to digital converter dan teknik interrupt. Percobaan dilaksanakan dengan sumber tegangan ac 12 volt yang diseri dengan resistor 20 kΩ lalu dihubungkan dengan masukan analog dan interrupt dari arduino UNO. Untuk transisi dari rendah ke tinggi, pada teknik adc dan interrupt masing-masing tertunda +0,5 ms terhadap nilai nol. Pada teknik adc dari tinggi ke rendah, nilai nol terdeteksi 0,3 ms sebelum kejadian sedangkan pada interrupt +0,25 ms setelah 0 volt terlewati.
Sistem Online Message Gateway Untuk Presensi Sidik Jari
Authors: Juni Wisnu Jati Rogo , Yohanes Banu Wirawan , Nugroho Saptadi
Published: November 2018

Sistem presensi di dalam makalah ini adalah sistem absensi menggunakan sidik jari yang diintegrasikan dengan online message gateway sebagai pengontrol tambahan. Data presensi yang diperoleh dari perangkat keras pemindai sidik jari secara waktu nyata dikirimkan ke komputer server untuk disimpan ke dalam database lalu dikirim dengan menggunakan bot (robot program otomatis) ke perangkat komputer/smartphone yang dituju. Pengujian yang telah dilakukan adalah pengujian koneksi alat dan laptop, pengujian database, pengujian kejadian waktu nyata pada saat proses pemindaian sidik jari dan pengiriman data ke komputer server serta pengujian pengiriman pesan dengan menggunakan bot. Dari hasil pengujian tersebut diperoleh prosentase keberhasilan sebesar 100 %.
Perancangan Indikator Belok dan Perlambatan pada Helm Sepeda Berbasis Android Smartphone
Authors: Wedhatama Simon , Susilo Deddy , Setiaji F. Dalu
Published: November 2018

Penggunaan sepeda sebagai alat transportasi masih populer dan digemari masyarakat. Tetapi jalur khusus sepeda yang disediakan masih sangat terbatas, itu pun masih sering diserobot pengendara kendaraan bermotor sehingga dapat membahayakan pesepeda. Oleh karena itu selain pesepeda perlu menggunakan perangkat keselamaan berupa helm, diusulkan tambahan fitur pada helm tersebut untuk meningkatkan keamanan pesepeda dari kemungkinan tertabrak kendaraan lain. Pada makalah ini helm sepeda dimodifikasi dengan menambahkan sejumlah lampu indikator (LED), yang dikendalikan oleh user interface berupa aplikasi Android smartphone yang nantinya diletakkan sepeda bagian depan sepeda yang mudah diakses pesepeda saat berkendara. Aplikasi ini dapat digunakan untuk menyalakan atau mematikan lampu sein kiri, sein kanan, lampu hazard, dan lampu depan, serta terdapat tampilan speedometer untuk mengetahui kecepatan sepeda dalam satuan km/jam atau m/s. Lampu indikator perlambatan juga akan menyala bila sepeda mengalami perlambatan sekitar -1m/s2.
Sistem Pendeteksi Gambar Termanipulasi Menggunakan Metode SIFT
Authors: Lionnie Regina , Alaydrus Mudrik
Published: November 2018

Pada penelitian di publikasi ini, penulis membangun sistem pendeteksi gambar termanipulasi dengan metode pemalsuan penyerangan copy-move. Metode SIFT oleh David Lowe digunakan untuk menentukan SIFT fitur vektor yang berisi deskriptor titik kunci dengan membandingkan 4 nilai (dr) perbandingan jarak antara hasil terdekat pertama dan kedua. Gambar sebagai masukan dari sistem dimanipulasi penulis dengan mengubah ukuran dan arah dari gambar asli. Hasil dari percobaan memperlihatkan bahwa metode SIFT memberikan kecocokan salah terkecil ketika bagian gambar yang disalin tidak diubah ukuran dan arahnya. Sedangkan, ketika ukuran diubah menjadi besar dan arah diubah sebesar 180 derajat memperlihatkan hasil kecocokan salah yang lebih banyak.
Early Quaternary history of the genus Archidiskodon (Proboscidea, Elephantidae) in Western Siberia: to the question of intermediate links in mammoth lineage
Authors: Foronova I.V.
Published: November 2018

The paper is concerned with the early representatives of the Archidiskodon–Mammuthus lineage from the sediments of Lower Pleistocene of the South of Western Siberia (Kuznetsk Basin). Several forms were being described within the genus Archidiskodon (A. meridionalis, A. m. tamanensis, A. m. voigtstedtensis, A. aff. wusti) which represent consecutive steps of progressive development of the lineage on the early stage of its evolution. Morphometric features of molars (M3) have been studied using the author’s original method designed for this group, which allowed specifying systematic attribution of the taxa under study and their position in the structure of the mammoth lineage. It was demonstrated that the form previously distinguished as Wust’s elephant and later attributed to the species M. trogontherii significantly differs from the latter in frequency and length of the plates. This form also stands out well statistically and is regarded as a separate and the latest taxon among the Archidiskodon group of elephants. A. wusti occupies a distinct position of an intermediate form (a ‘bridge’ as H. Pohlig put it) between the genera Archidiskodon and Mammuthus in the structure of the mammoth lineage. Thus, the multi-dimensional diagrams used in our method permit to take a step close to revealing of so-called intermediate links in the mammoth lineage. Direction of phyletic development and some adaptations of the group in the second half of Early Pleistocene are also discussed. Account is also given to the accompanying fauna and the existence period of these species on the territory under study.
Results of latest paleontological, stratigraphic and geoarchaeological research of the Volchia Griva mammoth fauna site
Authors: Leshchinskiy S.V.
Published: November 2018

The Volchia Griva is the largest site in Asia where the mammoth fauna remains are buried in situ. It is located in the Baraba forest-steppe (Western Siberia). In the 20th century, remains of at least 70 mammoths, 5 horses, 3 bisons and 1 wolf, as well as 37 stone artifacts were found here. The latest excavations of 2015–2017 on ~30 m2 revealed over 1500 bones and teeth, 95% of which belong to mammoths (at least 14 individuals), and the rest are from horses (3), bison, wolf, red fox, arctic fox, and rodents; associated artifacts – 23 items. With an average thickness of the bonebearing lens ~ 0.3–0.5 m, the local remain concentration exceeded 130/m2. The forty five crossed 14C dates were obtained from these materials, which reveal a burial period of ~20–10 ka BP. Obviously, there was the southernmost and one of the youngest mammoth refugia of Eurasia on this territory. The favorable Ca-Na geochemical landscape of the beast solonetz was the main reason for mammoth to visit the Volchia Griva. During the mineral starvation, the site attracted hundreds of large mammals, the remains of which were buried in mud baths and erosion forms. The main levels of the bone-bearing horizon have been forming for several thousand years, and that matched two waves of the megafauna’s geochemical stress in the Last Glacial Maximum and Late Glacial. Typical bone pathologies, such as exostoses, osteoporosis, erosion of articular surfaces, etc., characterize this process. These facts, together with the lack of strong evidence of hunting and butchering, indicate that the Volchia Griva was the natural mammoth death site, which was well known and used by Palaeolithic humans.
La visión de un nuevo estado de cosas en la Relación de Michoacán
Authors: Morales Campos Arturo , González Vidal Juan Carlos
Published: November 2018

En las últimas décadas, la Relación de Michoacán (que escribiera el fraile franciscano Jerónimo de Alcalá, cerca del año 1540) ha recibido una creciente atención. Ya no resulta extraño decir que, en varios textos de origen indígena pertenecientes a la actual América Latina, se pone en duda la autenticidad y se destaca la manipulación de la información, con la finalidad de privilegiar la visión española. Algunos historiadores han evidenciado dicha manipulación en el texto michoacano. No obstante, es necesario abordar la Relación desde otras posiciones teóricas (sociosemiótica y análisis crítico del discurso) con el fin de explicar la transposición de una visión de mundo occidental en la correspondiente p’urhépecha, sin que esta última desaparezca del todo.
Ley sobre accidentes en el trabajo de 1906: una legislación moderna para un sistema de justicia anquilosado
Authors: Rodríguez Castillo Oscar Abraham
Published: November 2018

A poco más de cien años de su promulgación, los alcances que tuvo la Ley sobre accidentes del trabajo, promulgada en 1906 por el gobernador de Nuevo León Bernardo Reyes, son difusos. El presente trabajo tiene la finalidad de despejar algunas dudas sobre la aplicación de esta ley. En ese sentido, utilizamos tres casos de accidentes laborales para mostrar lo siguiente: el procedimiento a seguir por el obrero lesionado, la parsimonia de los tribunales civiles para resolver estas demandas, por último, los recursos utilizados por la defensa para no pagar indemnización.Nuestras conclusiones apuntan a que los obreros debían recurrir a un litigante para encausar debidamente su demanda, y, en caso de ganar el juicio, esperar un largo tiempo para recibir la indemnización.
Inventarios, libros y diarios. Tres fuentes para el estudio de la cultura militar en México en el siglo XIX
Authors: Guzmán Pérez Moisés , Martínez González Xochitl
Published: November 2018

Este artículo tiene por objeto reflexionar la importancia de los inventarios de bienes, las librerías particulares, los libros especializados en guerra y los diarios personales, para el estudio de la historia política y la cultura militar en México. A partir de casos concretos, queremos ofrecer a los interesados en esta línea, perspectivas metodológicas de análisis, que les permitan profundizar en el conocimiento de las prácticas culturales de los hombres que formaron parte de las instituciones castrenses en la mencionada centuria. Las fuentes de información analizadas provienen de los archivos municipales, notariales y judiciales, tanto de la capital del país, de las entidades federativas, así como de bibliotecas institucionales.
Activating de novo triacylglycerol synthesis in oleaginous yeast for improved bio-diesel quality
Authors: Deeba Farha , Priyadarshi Ruchir , Pruthi Vikas , Negi Yuvraj Singh
Published: November 2018

The economic production of yeast biofuels requires several strategies, such as multiomics techniques to gain insights into lipid biosynthesis pathway. Hence, metabolomic studies for amelioration of triacylglycerol (TAG) accumulation in oleaginous yeast strain to reveal potential targets in fatty acid synthesis pathway should be explored. The aim of this research experiment was to boost TAG agglomeration in novel isolated oleaginous yeast Cryptococcus psychrotolerans IITRFD using sodium bicarbonate as supplement for biodiesel production. Enhanced biomass productivity (83.5 ± 0.32 mg/L/h) and lipid productivity (56.8 ± 0.34 mg/L/h) have been estimated as compared to yeast nitrogen base media (YNB) used as control. Also, the bicarbonate supplementation (25 mM) leads to decrease in phospholipids (23.6 %) while increase in TAG amount (75.4 %) signifying that it redirects the phospholipids synthesis pathway in the direction of de novo TAG pathway. The fatty acid profile obtained revealed rise in monounsaturated fatty acid content and decrease in polyunsaturated fatty acid content demonstrating better oxidative stability (19 h) and cold flow behaviour (- 12 °C) of biodiesel produced. This novel strategy of utilizing bicarbonate as a triggering system may possibly revamp the commercial use of C. psychrotolerans IITRFD for high quality biodiesel production. This is the first study to augment TAG accumulation in this oleaginous yeast using sodium bicarbonate with improved fuel properties.
Combination of load curves and tangent curve for customer’s load curve clustering
Authors: Phan Binh Thi Thanh
Published: November 2018

The load curve clustering for electrical customers traditionally is based on the 24- dimension input space. It means that every load curve is considered as an element with 24 attributes corresponding to 24 load values per 0day. But in some cases, the load curve itself can not lead to the right cluster when the two curves have different forms but have the same distance to the third one. To overcome this limitation, the present paper pays attention to the selection of the input space. From each load curve, the tangent curve will be received. Now the clustering will be based not only on the load curve but on the tangent curve. The clustering techniques used the Pulsar algorithm with some modifications to fit the input space. Examining for the electrical load curve of Ho Chi Minh city constumers, the propose approach has achieved the best results.
Determination of rational mass of span crane with box girders
Authors: Nguyen Son Danh
Published: November 2018

Mass is one of important parameters of a machine,which affirm the manufacturer, price of machine. The determination of rational mass of a crane is one important and necessary problem for reduction of machine price. The paper comes up with analytic formulas to determine rational mass of a crane.They can be used in calculation of machine effect and in optimization
Evaluation of sewage sludge compost quality through maturity index and biomass yield of Italian ryegrass (Lolium multiflorum L.)
Authors: Nguyen Binh Thanh , Hoang Quynh Thi , Oshiro Syoko , Shima Kazuto
Published: November 2018

Sewage sludge as raw material and Composts was collected from composting plant “Chugoku Yuki” in Okayama prefecture, Japan to evaluate Compost quality at 8, and 50 days in process. Compost quality was assessed by analyzing of chemical properties: pH, total carbon, total nitrogen, C/N ratio, available nitrogen, total phosphorus, available phosphorus and P fractions. A pot experiment was conducted to investigate the effects of four Compost application rates (1, 2, 4 and 6 tons ha-1) on biomass yields and nitrogen – phosphorus uptake efficiency by Italian Ryegrass. Control treatments included without and with chemical fertilizers supplying equal amounts of N + P2O5. The results showed that Compost reached to degrees of stability and maturity after 50 days of composting. Composts contain high levels of nitrogen and phosphorus, heavy metals contents meet the acceptable standards. Total biomass yields significantly increased with increasing application rates following Mitscherlich’s asymptote regression model, by which the maximum yields were estimated to decrease in following order: Compost 50 days > Chemical fertilizer > Compost 8 days. Nitrogen uptake efficiency by ryegrass were similar between two above Composts, while those of Phosphorus was higher at Compost 50 days.
Application of fluorescence technique in studying dental caries
Authors: Pham Mien Thi Mai , Tran Tien Van , Huynh Linh Quang
Published: November 2018

The aim of the present study was to investigate the fluorescence properties of sound teeth and teeth with different types of lesions. Using light-emitting diodes operating in the near ultraviolet (UVA) spectral regions for excitation, the obtained fluorescence images and spectra of carious teeth were different from sound teeth spectra due to the presence of bacteria Streptococcus mutans producing metabolites called porphyrins. The sound teeth showed the blue fluorescence with broad emission spectra from 410 nm to 650 nm (maxima at 450 nm, 500 nm and 520 nm), while the carious regions illuminated the red light with three new peaks at 625 nm, 650 nm and 690 nm. The intensity of the red fluorescent signal depends on the density of the bacteria. Based on the red fluorescence emitted by porphyrins, not only the surface lesions but also the caries hiding under the enamel layer can be detected by UVA exciting. These results provide the ability to apply fluorescence technique in the development of an early dental diagnostic tool with a number of advantages such as safety, mobility, low cost and rapid test time.
A Modified Semi-parametric Regression Model For Flood Forecasting
Authors: Le Tuan Hoang , To Dung Anh
Published: November 2018

In recent years, inundation, one of natural calamities, occurs frequently and fiercely. We are sustained severe losses in the floods every year. Therefore, the development of control methods to determine, analyze, model and predict the floods is indispensable and urgent. In this paper, we propose a justified semiparametric regression model for flood water levels forecasting. The new model has three components. The first one is parametric elements of the model. They are water level, precipitation, evaporation, air-humidity and groundmoisture values, etc. There is a complex connection among these parametrics. Several innovated regression models have been offered and experimented for this complicated relationship. The second one is a non-parametric ingredient of our model. We use the Arnak S. Dalalyan et al.’s effective dimension-reduction subspace algorithm and some modified algorithms in neural networks to deal with it. They are altered back-propagation method and ameliorated cascade correlation algorithm. Besides, we also propose a new idea to modify the conjugate gradient one. These actions will help us to smooth the model’s non-parametric constituent easily and quickly. The last component is the model’s error. The whole elements are essential inputs to operational flood management. This work is usually very complex owing to the uncertain and unpredictable nature of underlying phenomena. Flood-waterlevels forecasting, with a lead time of one and more days, was made using a selected sequence of past water-level values observed at a specific location. Time-series analytical method is also utilized to build the model. The results obtained indicate that, with a new semiparametric regression one and the effective dimension-reduction subspace algorithm, together with some improved algorithms in neural network, the estimation power of the modern statistical model is reliable and auspicious, especially for flood forecasting/modeling.
On some geometric characteristics of the orbit foliations of the co-adjoint action of some 5-dimensional solvable Lie groups
Authors: Le Vu Anh , Nguyen Tuan Anh , Duong Hoa Quang
Published: November 2018

In this paper, we discribe some geometric charateristics of the so-called MD(5,3C)-foliations and MD(5,4)- foliations, i.e., the foliations formed by the generic orbits of co-adjoint action of MD(5,3C)-groups and MD(5,4)-groups.
An improved radial point interpolation method applied for elastic problem with functionally graded material
Authors: Phung Viet Quoc , Nguyen Nha Thanh , Truong Thien Tich
Published: November 2018

A meshless method based on radial point interpolation was developed as an effective tool for solving partial differential equations, and has been widely applied to a number of different problems. Besides its advantages, in this paper we introduce a new way to improve the speed and time calculations, by construction and evaluation the support domain. From the analysis of two-dimensional thin plates with different profiles, structured conventional isotropic materials and functional graded materials (FGM), the results are compared with the results had done before that indicates: on the one hand shows the accuracy when using the new way, on the other hand shows the time count as more economical
A new method of electrodes placement to improve QRS detection in real-time stress ECG acquisition
Authors: Le Dang Cao , Nguyen Tan Hoang , Phan Nam Hoai , Thai Quoc Minh
Published: November 2018

In dynamic threshold method to detect QRS complex from ECG signal, especially in real-time application, there are two main issues: baseline drift and noise. This paper introduces an improved QRS complex detecting method using dynamic threshold algorithm combined with a new method of electrodes placement to minimize baseline drift and different types of noise in real-time ECG acquisition with moving patients. Our method proved to be more effective in detecting QRS complex with less error due to minimized baseline drift and noise in original ECG signal.
An isogeometric analysis approach for twodimensional steady state heat transfer problems
Authors: Le Em Tuan , Nguyen Khuong Duy , Vu Hoa Cong
Published: November 2018

The purpose of this article is studied the application of isogeometric analysis (IGA) to two-dimensional steady state heat transfer problems in a heat sink. By using high order basis functions, NURBS basis functions, IGA is a high rate convergence approach in comparison to a traditional Finite Element Method. Moreover, the development of this method decreased the gaps between CAD and mathematical model and increased the continuity of mesh.
Measurement -based electrical parameters of power transformers for Frequency Response Analysis interpretation - Part I: Core analysis
Authors: Pham Khoi Dinh Anh
Published: November 2018

Although the standard Frequency Response Analysis (FRA) test has been approved as an efficient tool to diagnose mechanical failures in power transformers, the demand to interpret FRA traces in practical and physical way is still requested. That means physical electrical parameters of transformers should be determined reasonably based on real measurements and afterwards are applicable for the interpretation. For purpose of FRA interpretation in practical manner, electrical parameters of power transformers in a physical equivalent circuit should be determined. As a first step, the paper introduces a new approach in determining frequency dependent core impedances of a distribution transformer based on the combination of circuit analysis of a duality-based model, measurements of driving-point impedances and experimental formulas. From that, two important contributions can be drawn. Firstly, frequency dependent core impedances are ready as available components in the circuit for FRA interpretation in broad frequency range. Secondly, the core parameters could be useful indicators for detecting relevant failures in cases there is no more failure on transformer windings.
Use of local inoculants to produce organic fertilizer from the brewing industry
Authors: Nguyen Nguyet Thi Nhu , Nguyen Bien Khac , Trinh Huyen Thi Bich , Dang Hanh Vu Bich
Published: November 2018

This paper presents the possibillity of using native microoganisms from the brewery’s post-treatment sludge in order to create fertilizers by the windrow composting. The result showed that there are 3 representive useful microoganisms in the following: C1, C4 and C6. At the same time, the change in the composition of supplementary fiber into 4 treatment has resulted in the following : the everage C/N ratio of treatment are from 20 to 29, the average pH of the ratios is 7,82; total nitrogen fixation average is 2108; the highest is 5108; the smallest is 8107, microoganisms which are capable of decomposing cellulose average is 7 x 106; the highest is 9106, the lowest is 5106. Total Salmonella and E. coli are 0; the after-testing products meet the standard in the Viet Nam Bank for Agriculture and Rural Development.
Image processing for cervical pathology diagnosis using cervix’s polarized images
Authors: Tran Tien Van , Phan Cat Ngoc Phuong , Huynh Linh Quang , Nguyen Quynh Ngoc , Nguyen Hieu Trung
Published: November 2018

Cervical pathologies are frequently occuring diseases and may affect women’s quality of life in many ways. These pathologies are curable with early detection and with a following suitable treatment plans. Colposcopy is a standard examination among screening methods which are used to early detect the abnormal lesions on cervix’s surface. Recently, studies about processing polarized image show ability to support diagnosis of the cervix. In this research, we use cervix’s polarized images and image processing algorithms to segment the blood distribution of Nabothian cyst and Trichomonas vaginalis infection. These results have the potential to provide underlying information of the cervix to support the diagnosis.
Analyze thermo-mechanical problem by isogeometric analysis for structures used functionally graded material
Authors: Nguyen Khuong Duy , Nguyen Tien Manh , Vo Chien Trung , Nguyen Hung Xuan , Vu Hoa Cong
Published: November 2018

The objective of this paper is apply isogeometric analysis (IGA) to analyze thermoelastic behavior of functionally graded material (FGM) structures. IGA is built on NURBS basis functions used to model exact geometries with higher-order approached functions. The FGM is a type of advanced composite material has material properties is continuous distributed variation through thickness direction. The results are verified with other numerical results and results from COMSOL commercial software.
Inhitive ability collagenase of N-(cinnamyl) chitooligosaccharide derivative
Authors: Le Xuan Minh , Nguyen Khanh Duy , Tran Khoa Dang , Tran Tuan Quoc , Ngo Nghiep Dai
Published: November 2018

Chitooligosaccharides (COS) with molecular weight 4633 Da and 84.67% of deacetylation were synthesized by hydrolysis of chitosan by cellulase at room temperature (33 ± 1 ° C). This COS, then, were chemically modified by grafting cinnamaldehyde at amino groups on the COS. Derivatives of N- (cinnamyl) chitooligosaccharides (CCOS) synthesized with 50.64% of yield and 72.22% of extent of substitution had inhibitory activity enzyme collagenase (a group of matrix metalloproteinases, enzyme family related to metastatic ability of cancer). Compared with the positive control, 58.23% of the effective to inhibit collagenase of CCOS at 1000 μg/ml concentrate. In addition, the CCOS cytotoxicity of CCOS was also assessed by MTT method, the results showed that non-toxic derivatives of animal cells and thus can be tested and applied in living systems.
Comparative study of maximum power point tracking algorithms for wind turbine using permanent magnet synchronous generator
Authors: Huynh Minh Quang , Nguyen Liem Van
Published: November 2018

Wind power is more and more developed as a renewable energy source. It is very essential to extract the maximum available power from the wind by operating the wind turbine at its optimal operating condition, called maximum power point tracking (MPPT). Perturb & Observe (P&O) is the simplest and mostly used algorithm for this purpose. However, this algorithm has its own disadvantages such as oscillation at maximum power point and wrong directionality under fast variation wind speed. Lots of publications are presented to solve these problems. In this paper, a conventional P&O algorithm, a modified MPPT algorithm and a fuzzy MPPT algorithm for variable speed wind turbine using permanent magnet synchronous generator (PMSG) are tested and compared in the terms of complexity, speed responses and the ability to acquire the maximal energy output.
Extended finite -element method for modeling the mechanical behavior of functionally graded material plates with multiple random inclusions
Authors: Tran Bang Kim , Tran Huy The , Bui Tinh Quoc , Truong Thien Tich
Published: November 2018

Functionally graded material is of great importance in many engineering problems. Here the effect of multiple random inclusions in functionally graded material (FGM) is investigated in this paper. Since the geometry of entire model becomes complicated when many inclusions with different sizes appearing in the body, a methodology to model those inclusions without meshing the internal boundaries is proposed. The numerical method couples the level set method to the extended finite-element method (X-FEM). In the X-FEM, the finite-element approximation is enriched by additional functions through the notion of partition of unity. The level set method is used for representing the location of random inclusions. Numerical examples are presented to demonstrate the accuracy and potential of this technique. The obtained results are compared with available refered results and COMSOL, the finite element method software.
Photocatalytic decolorization of Procion 032 Carmine Red using titania nanotubes
Authors: Nguyen Thuy Thi , Huynh Anh Tuan , Ngo An Vinh , Nguyen Huy Nhat
Published: November 2018

In this study, we report for the first time on the photocatalytic decolorization of Procion 032 Carmine Red (PC032) using titania nanotubes (TNTs). Photocatalysts of TNTs were synthesized by hydrothermal method under strong alkali condition using powder TiO2 as a precursor and calcined at different temperatures (100 - 700oC). The materials were then characterized by transmission electron microscopy (TEM), Brunauer-Emmett-Teller analysis (BET), and X-ray diffraction (XRD). The decolorization tests of PC032 and other dyes were conducted under ultraviolet at 365 nm (UVA) irradiation using a batch photocatalytic reactor in which TNTs was suspended in the dye solution by continuous magnetic mixing. Experimental results showed that calcination temperature affected on both the material properties and the photocatalytic activity. The surface area of the materials decreased while anatase crystallinity increased with the increase of calcination temperature, as from BET and XRD results. For photocatalytic activity, TNT calcined at 600oC (T-600) showed the highest PC032 removal efficiency of almost 100% after 60 min of irradiation. The durability test showed that the activity of T-600 was still stable after at least 10 times of repetition of treatment. Moreover, T-600 was also effective for decolorization of other dyes and could be a promising photocatalyst for advanced wastewater treatment in textile industry.
Germplasm Diversity of Banana (Musa sp) in Bangka Island Based on Morphological Character
Authors: Lesta Lesta , Mustikarini Eries Dyah , Prayoga Gigih Ibnu
Published: November 2018

Banana (Musa sp) is a plant that has good nutrion, mineral, vitamin A, B complex, vitamin C, and vitamin B6. Germplasm diversity of local banana in Bangka has never been identified. Research about germplasm diversity of banana in Bangka Island need to maintain germplasm of Bangka local banana. This research was conducted in Bangka Island. Characterization of banana fruit germplasm includes on qualitative and quantitative traits. Analysis of morphological relationship of banana fruit germplasm used UPGMA. Exploration result obtained 22 germplasms of Bangka local banana. The result of relationship analysis showed four clusters at 0,40 (40%) coefficient. Cluster one consists of Udang germplasm. Cluster two consists of Jernang and Rotan germplasm. Cluster three consists of Wei, Kapal and Abu germplasm. Cluster four consists of Madu Manis, Madu Keling, Gambur, Jambi, 40 Hari, Bawang, Geda, Tematu, Serindit, Masak Ijau, Rejang, Madu Pulau, Kecit Lantai, Susu, Gede and Lilin germplasm. Bangka local banana have wide variability in almost morphological character observed.
Performance of Soybean Genotypes Selected on Shade Environment Under Rubber Stands
Authors: Alia Yulia , Soverda Nerty , Lestari Ardiyaningsih Puji , Fitriani Miranti Sari
Published: November 2018

Research was aimed to evaluate  performance of new genotypes of soybean selected in shaded environment under rubber stands and compare it with superior soybean varieties. Field experiment was arranged in a simple Randomized Block Design. Treatments comprised five levels namely four soybean genotypes selected in artificial shade and one shade tolerant superior soybean variety as a check. Each treatment was replicated 5 times. Experimental unit was a plot with size 3 m x 2 m  with 100 plant population. Ten plants were used as samples. Observations were made on growth and yield variables. Such variables were plant height, number of branches, and stem diameter, while the observed yield variables included number of pod per plant, 100 seed weight, and seed weight of 10 plants. Observed data were analyzed by Analysis of Variance and continued by Duncan Multiple Range Test at α 5% level to compare the tested genotypes. Results showed that all the tested soybean genotypes gave the same performance with superior varieties of Anjasmoro in terms of stem diameter, number of branches, number of pods per plant, weight of 100 seeds, and seed weight of 10 stems of the plant. The difference was seen in of plant height where the selection genotypes were significantly shorter than  Anjasmoro Variety.
Aplikasi Mobile Perpustakaan Berbasis Android (Studi Kasus Perpustakaan STMIK Palangka Raya)
Authors: Qamaruzzaman M. Haris , Haris Ferdiyani
Published: November 2018

Android is an operating system for mobile devices based on Linux, versions of android is ever released Android version 1.1, Android version 1.5 (Cupcake) Android version 1.6 (Donut), the Android version 2.0 / 2.1 (Eclair), Android Version 2.2 ( Froyo or Frozen Yoghurt), and Android version 2.3 (Gingerbread). There is no problem of this research is to create a mobile application android-based library (library, case studies Palangkaraya Campus). This system aims to help students find the information collections, membership, books being borrowed and never borrowed, change passwords member, information libraries and librarians. The system is made using Eclipse, the Java programming language, PHP and MySQL as a media server that is accessed using the application The methods in this study includes data collection method (observation, literature, and interviews) and analyzed using analysis systems PIECES. Analysis PIECES have 6 (six) phases Performance, Information, Economics, control, efficiency and service. In this study has been conducted to test black box testing or testing program errors and the result of the program can be run to provide better information.
Analisis Penerimaan Mahasiswa Terhadap Sistem Informasi Akademik (SIAKAD) dengan Metode Technology Acceptance Model (TAM)
Authors: Librado Dison
Published: November 2018

Computer based data processing is expected to improve user performance, but the computer was not completely accepted by individuals. STMIK AKAKOM in one of their activities applied information technology to SIAKAD that provides some features for learning activities on campus

The analysis of SIAKAD acceptance by students using the technology acceptance  model (TAM), with partial least square , is to know how the behavior of SIAKAD users as the end user? It would be related to usefulness (PU), ease of use (PEOU), attitude toward using (ATU), and behavioral intention to use (BITU).

From the analysis of data, the results is mention that there were a positive and significant influence between the variables. Technology acceptance factors that inflict attitude to use SIAKAD by student in their learning activities is the ease of use and usefulness )
Sistem Pendukung Keputusan Kelayakan Pemberian Kredit Motor Honda dengan Mengunakan Metode Profile Matching
Authors: Elizamiharti Elizamiharti , Chaniago Amuharnis
Published: November 2018

Determination of the credit worthiness of motorcycle are often inaccurate, As a result in the risk of bad debts are carried by the aplicant. It required an application decision support system that aims to analyze the applicant was eligible for the credit. The benefits obtained with this system is helping to company in determining the  feasibility of granting credit. Profile matching is method of decision support system that can be used in this system. Applicants who apply for credit will be assessed based on the criteria set by the company. Then the value of the profile which is owned by an applicant will be matched by the value of the achievement of pre-defined profiles. The outcome of this process is rank wich can be used as a arecommendation for the decision maker to determine an applicant eligible to receive the credit . This software is made by using the programming language PHP and database using Mysql.
Analisa Tingkat Prestasi Atlet Karate Sumatera Barat Menggunakan Algoritma Data Mining
Authors: Syahputra Ronaldo , Safitri Wifra
Published: November 2018

The Karate sport is a kind of sport that is quite popular today. All regions in Indonesia are racing to improve the performance of their karate athletes. Various developments were carried out to be able to improve karate sports achievements. This research will later be used as a benchmark for developing and realizing good sports performance, especially in the karate by using the concept of data mining. To apply the concept of Data Mining, one way that can be done is to implement the C4.5 algorithm. C4.5 algorithm or also called decision tree algorithm, is a very strong and well-known classification and prediction method. The application of the concept of data mining with C4.5 algorithm is done by analyzing what factors support the achievement of karate sports. After that, the C4.5 algorithm is calculated to find out what is the most decisive factor in the development of karate sports achievements. This aims to maximize the role of these achievement supporting factors. The results of this study are expected to provide great benefits for the development and improvement of the achievements of karate athletes in West Sumatra.