bluuebunny/crossref_metadata_2025 huggingface dataset:
A Modified Approach for Torsional Vibration Analysis of Some Rotor Systems Using Holzer and Matlab GUI Techniques
Authors: Nassar Ameen , Yaseen Duna
Published: September 2020

A modified approach for the analysis of torsional vibrations in some rotor systems using modified Holzer and Matlab techniques, by building a graphical user interface (GUI), has been developed. The specific objective of this work is to illustrate the applicability and usefulness of the modified approach and the Matlab GUI in analyzing the effects of torsional vibration on some well known rotor systems such as two, three, and five rotor systems. Well Known problems in the field of torsional vibration were analyze. The results illustrate that the developed approach and the GUI are very useful tools for engineers, designers, and analysts of vibration problems in rotor systems.
Evaluation and Optimization of Composite Thermal Insulators from Waste Materials
Authors: Mashkoor Eman , Mohammad Haider , Dakhil Saadoon
Published: September 2020

The present work includes a study on the effect of loading rubber waste into cement mortar on the thermal and mechanical properties of a thermal insulator.The experimental work of the study included the preparation of ten models of 35 mm diameter and 5 mm thickness. Portland cement and natural sand were used as a matrix and rubber waste (extracted from the consumed tires) as a filler was added in weight percentages ( 5% ,10% ,15% ,20% ,25% ,30% ,35% ,40%,45% and 50%). Water was also used as a binder.Also, the experimental work included conducting a thermal conductivity test using Lee’s Disk method, and a hardness test using the Shore scale. The theoretical side included extraction of empirical equations, depending on the experimental results. The thermal conductivity equation was for two variables, temperature and mass fraction. While the hardness equation was for one variable, mass fraction. Theoretically determined heat capacity was extracted using the equations of the composites. Based on the empirical equations of thermal conductivity and hardness and using the technique of multi-objectives genetic algorithm, the optimum values of temperature and mass fraction were extracted, which achieve the best thermal insulation of the mortar.The results showed a significant decrease in thermal conductivity. The reduction in thermal conductivity was (90.3%) at 5% and reduced to (95.73%) at 50%. The specific heat capacity was increasing as the percentage of rubber waste increase. The results also indicated a decrease in hardness. The optimal value of thermal insulation was (0.02658 W/m2.ºC ) as a thermal conductivity and (58.07 N/m2) as a hardness, at temperature (50°C) and mass fraction (27.764%) of rubber waste.Index Terms— rubber wastes ,empirical data , genetic algorithm.
Revision Study of Green Concrete
Authors: Saadoon Ahmed , Abbas Abdulnasser , Almayah Abdulamir
Published: September 2020

It is very crucial to minimize the environmental impact that induced from the development of industry, by applying strict policies and innovate eco-friendly industries. Indeed, construction manufacture considered as one of the most industries that affect the environment, especially concrete production and usage in structural buildings. For instance, traditional concrete, which is consists of a high amount of cement, is contributed to the emission of CO2. Therefore, researchers seeking to develop a new technology of concrete by replacement some amount of cement by materials which are considered to become more friendly to the environment. Nowadays, this new technology is known as Green Concrete. The importance of using green concrete is not only to decrease the emission amounts of CO2 but also to replace cement by industrial waste. In this paper, a review has been presented to understand green concrete benefits and materials that may be used instead of cement and aggregate.
Polygon Shape Formation for Multi-Mobile Robots in a Local Knowledge Environment
Authors: Rashid Abdulmuttalib , Ali Abduladhem
Published: September 2020

The formation is an important task in multi-mobile robots coordination in a defined environment. In a local knowledge environment the multi-mobile robot formations are realized using small robots with minor hardware requirements. The localization, path planning and obstacle avoidance processes are required to perform formation. In this paper a static strategy for polygon shape formation is implemented using a several number of mobile robots. This strategy has a better efficiency, since it use the cluster matching algorithm instead of the triangulation algorithm in completing the formation. Also, the visibility binary tree algorithm and the reciprocal orientation algorithm are used in this paper. This strategy has better performance in the multi-robot formation, since it use the cluster matching algorithm instead of the triangulation algorithm.
Effect of Surface Waves on Submarine Pipeline during Lying
Authors: Saber Duha , Abdulrazzaq Oday , Saleh Samoel
Published: September 2020

Submarine pipelines are essentially used for the transmission of gas and oil across oceans between countries or for transport between shore and offshore installations. The pipeline applications were studied to be installed in deep water, which exposed to different loads such as currents and waves in various directions, barge movements, seafloor interaction, etc. This paper developed a dynamic analysis of the J-lay suspended submarine pipeline during laying taking into account the effect of water depth, the direction of the wave heading, and sea state without vessel movement. The finite element program ANSYS R17.2 is used for modeling and analysis of the pipelines. The random sea state is modeled using the JONSWAP spectrum. It was found that the effect of the direction of wave heading on the bending moment from dynamic analysis of pipeline is obvious in a depth of (2 m) below water surface, and then gradually decreases until it disappears in depth of (100 m). Whereas the effect of wave height is obvious in a depth of (2 m) and then gradually decreases until it disappears in depth of (120 m).
The use of Horizontal Flow Constructed Wetland for Treatment of Sanitary Wastewater in Iraq
Authors: Ajell Azraa , Hamza Zuhal , Al-Rekabi Wisam
Published: September 2020

Constructed wetland is engineering systems used for wastewater treatment, whose objective is to reuse water, under the controlled condition, the mechanisms of treatment that occur in natural environments, through the development and get better the process that includes the porous media, plants, and gathering microbial. This paper explains horizontal flow in constructed wetland treatment, the horizontal flow is moving through the gravel media bed and vegetation which permits the wastewater flow through roots and has contact with the biofilm created in the subsurface wetland. To estimate the quality of treated water, some physical, chemical and biological parameters were measured. Treated wastewater from fieldwork showed removal efficiency was increased with time and showed the average removal after detention time of 3, 4, and 6 days, respectively, (47.7 %, 53.2 %, 77.5%) removal of COD, (45.1%, 52.8%, 64.4%) removal of TN, (55.4%, 58.8%, 72.2%) removal of NH4, also average removal of Nitrate was (19.41%) after 3 days. The results showed that the system was effective in removing target pollutants.
Design and Construction of a New Automated Device for Testing the Scratch Resistance of Polymeric Materials
Authors: Hussein Mushtaq , Hassan Abdul Kareem , Saad Najim
Published: September 2020

This paper aims to design and construct of an automated device for testing the scratch resistance of the polymeric materials by measuring the force required to cause a scratch on the surface of polymeric materials as well as calculating the friction coefficient from the input and output of the device. The device was made of materials available in the local market and some parts were manufactured in local mechanical workshops. The device consists of four main parts were mechanical parts, scratching mechanism parts, electrical and electronic parts and the device operating program. The device designed in this work has the following specifications: normal load (0.1 N - 325 N), sliding speed (1 mm/s - 35 mm/s), tangential force measured by the load cell (0.1 N to 294 N), the samples dimensions (length: 10 - 195 mm, width: 10 - 125 mm, and thickness: 0.25 - 50 mm), maximum scratch length of 195 mm, and the height of the indenter from the platform surface (0.25 mm to 50 mm). Scratch test and calculation of the friction coefficient were performed for samples of pure and reinforced PMMA by Silicon Oxide nanoparticles (SiO2). The results showed an increase in scratch resistance and a decrease in the friction coefficient with increasing the weight ratio of SiO2. Also, the ability of the designed device to measure the tangential force required for scratching accurately and quickly and in simple steps.
Determination of the reproductive characteristics of Saanen goats using estrus synchronization and the growth performances of kids
Authors: ERDEM Evren , ÖZBAŞER Fatma Tülin , ATASOY Fatih
Published: September 2020

This study aimed to determine the reproductive characteristics of Saanen goats of Australian origin using an estrus synchronization program with hormones (MPA and PMSG) in two different mating periods (Period I and Period II) and to investigate the survival rates and growth performances of kids. According to the results of the research, it was determined that pregnancy rate and litter size were higher in the mating period I (87% and 2.16) compared to mating period II (80.5% and 2.03), and it is hypothesized that this situation is related to the length of dry period of the goats. Although the mortality rate (P˂0.001), and body weight (P˂0.05) at birth were affected by kidding season, the survival rate and their body weights of the Saanen-kids at days 30, 60, 90, and 120 were not affected by the kidding season (P>0.05). These results indicate that the kidding season should be an environmental factor to be taken into account when planning the production. In addition to this, it is important to optimize the care and management conditions, especially during the kidding season, due to the high multiple birth types for the estrus synchronization program in Saanen goats.
Effects of dietary supplementation of red ginseng root powder on performance, immune system, caecal microbial population and some blood parameters in broilers
Authors: YENER Yavuz , YALÇIN Sakine , ÇOLPAN İrfan
Published: September 2020

The aim of the research was to determine the effects of red ginseng root powder on performance, immune system, caecal microbial population and some blood parameters in broilers. A total of 224 daily Ross 308 male broiler chicks were divided into one control group and three experimental groups each containing 56 chicks. Red ginseng root powder was added to the diets of groups at the level of 0, 75, 150 and 225 mg/kg, respectively. The experimental period was 38 days. There were no differences in growth performance. Addition of 225 mg/kg of the red ginseng root powder increased the relative weight percentages of spleen and gizzard (P<0.05). Ginseng root powder supplementation didn’t affect biochemical parameters and antibody titers in blood serum. The values of haemoglobin, leukocytes, red blood cell distribution width and mean corpuscular haemoglobin concentration in group fed diet supplemented with 225 mg/kg ginseng were increased significantly (P<0.001). The count of Lactobacillus spp. in the caecum (P<0.05) was increased with 75 mg/kg ginseng root powder addition. As a result, improvements were provided in immune organ weight and some hematological parameters with the addition of 225 mg/kg and in Lactobacillus spp. count in caecum with the addition of 75 mg/kg red ginseng root powder to the diets in broilers. Further studies are required to evaluate the bioavailability of the active compounds of red ginseng root powder and to determine the effects of its various doses on performance, immunity, antioxidant potential and intestinal microflora under various stress conditions in poultry.
Occurrence of Neophilopterus tricolor (Burmeister, 1838) on a black stork (Ciconia nigra) in the Kızılırmak Delta, Turkey
Authors: AÇICI Mustafa , EREN Gökhan , ÖZKOÇ Ömral Ünsal , ÖZTÜRK Mehmet , BÖLÜKBAŞ Cenk Soner
Published: September 2020

A dead black stork (Ciconia nigra) was found by an a birdwatcher in the Kızılırmak Delta near Samsun, Turkey and brought to the Parasitology Laboratory of the Faculty of Veterinary Medicine at Ondokuz Mayis University for ectoparasitological examination in December 2019. During the examination, 45 specimens of chewing lice (21 males, 18 females and 6 nymphs) were collected. All of the specimens were identified as Neophilopterus tricolor (Burmeister, 1838) (Ischnocera: Philopteridae). Neophilopterus tricolor is reported from the black stork (C. nigra) for the first time in Turkey.
The effectiveness of intravaginal progesterone insert in Ovsynch and resynchronization protocols in cyclic and non-cyclic Holstein heifers
Authors: ABAY Murat , GÜNGÖR Örsan , PANCARCI Şükrü , BEKYÜREK Tayfur , KAYA Mehmet , DEMİRAL Ömer , GÜRBULAK Kutlay , CANOOĞLU Esra , ÜN Mustafa
Published: September 2020

In the present study, it was aimed to compare of resynchronization with used progesterone (P4) releasing intravaginal device (PRID), with modified ovulation synchronization in cyclic and non-cyclic Holstein heifers. Animals were randomly divided into two groups; Group I (GI, n=87) and Group II (GII, n=88). Fixed-time artificial insemination (FTAI) following modified Ovsynch protocol with PRID insertion, was performed to all animals. In GI, used PRID was reinserted to the same animals, 15 days after the first FTAI (day 25) for 12 days. Pregnancies were detected by ultrasound in all groups on day 37. For resynchronization, prostaglandin (PG) F2α was applied to non-pregnant animals on day 37. In GI, following 48 hours from PGF2α injection, the gonadotropin-releasing hormone was administrated, and after 18 hours the second FTAI was performed. No additional treatments were applied to the non-pregnant animals found in GII, and heifers were taken to the routine service program. In both groups, the second pregnancy diagnosis was performed 27 days after inseminations by transrectal ultrasonography. Pregnancy rates (PR) following the first and overall inseminations in cyclic and non-cyclic heifers (GI and GII) were detected as 66.4% and 52.3% (P>0.05); 76.3% and 59.1% (P>0.05), respectively. In conclusion, the usage of PRID in the Ovsynch and resynchronization protocol resulted in higher PRs of non-cyclic heifers than cyclic heifers. Moreover, this study reveals that the initial P4 levels of non-cyclic animals should be used as a determinant for pregnancy success in dairy heifers.
Detection of SARS-CoV-2 using five primer sets
Authors: KARAGÖZ Alper , TUTUN Hidayet , ARSLANTAŞ Tutku , ALTINTAŞ Özlem , KOÇAK Nadir , ALTINTAŞ Levent
Published: September 2020

A novel coronavirus (SARS-CoV-2) outbreak, responsible for a pneumonia-associated respiratory disorder (COVID-19), has started in early December 2019 in Wuhan, China, and has rapidly spread around the world. Rapid and accurate diagnostic testing plays a crucial role in tackling the COVID-19 pandemic. In this study, it was aimed to compare 5 primer sets designed to amplify different regions for the detection of SARS-CoV-2 and to perform sequence analysis. Conventional RT-PCR was carried out using primers targeting different regions of the virus genome including ORF1ab, Envelope (E), RNA-dependent RNA polymerase (RdRp), Spike (S) and Nucleocapsid (N) genes for the diagnosis of COVID-19. DNA sequence of ORF1ab gene from each sample were compared with the DNA sequence data of SARS-CoV-2 stored in the GenBank and ORF1ab phylogenetic tree was constructed. The amplicon sizes of ORF1ab, S, E, N and RdRp genes were 588 bp, 440 bp, 145 bp, 323 bp and 196 bp, respectively. The SARS-CoV-2 RNA was detected from 74% of total samples from RdRp gene, 87% for N gene, 74% for S gene, 61% for E gene and 82% for ORF1ab region. The ORF1ab sequences of SARS-CoV-2 from 82 patients were had 100% identity to the sequence of Wuhan isolate and among themselves. The phylogenetic analysis revealed that all isolates formed a cluster. The results of this study suggest that the N region is the best for SARS-CoV-2 identification.
An Investigation into KLK5, KLK6 and KLK7 Expressions in Intracranial Tumors
Authors: TURNA Gamze , KILIC Nedret , KURT Gokhan , DOGULU Fikret , CEVIKER Necdet
Published: September 2020

Aim: Kallikrein-related peptidases (KLKs) are a subgroup of serine proteases which consists of 15 genes located on the 19th (19q13.3-4) chromosome. Previous studies have shown that kallikrein-related peptidases (KLKs) associated with a variety of cancer types. However, few studies have investigated the role of KLKs in diagnosis and prognosis in intracranial tumors. Therefore, this study aimed to determine expression level changes of KLK5, KLK6 and KLK7 in intracranial tumors.

Materials and methods: Meningioma grade I (n=15) and glioblastoma multiforme (n=15) tumor samples were examined for KLK5, KLK6 and KLK7 mRNA gene expression using reverse transcriptase polymerase chain reaction (RT-PCR). Their protein expression were determined using Western blotting.

Results: KLK5 and KLK7 mRNAs and proteins are expressed more frequently in meningioma group whereas KLK6 mRNA and proteins are expressed more frequently in glioblastoma group.

Conclusion: To conclude, when meningioma and glioblastoma groups were compared, it was found that there were differences in mRNA and protein expression levels of KLK5, KLK6 and KLK7. These genes may have a potential as a new biomarker for diagnosis in intracranial tumors.
Plastics: the world trends of production, application, processing and recycling. Short review of K-2019 and Plast Eurasia 2019 Exhibitions
Authors: Abramov V. V. , Chalaya N. M. , Abramushkina O. I.
Published: September 2020

In a brief review, the authors tried to present the main trends in the development of the plastics manufacturing, processing, consumption and recycling sectors. When considering various types of polymeric materials, the authors drew attention to the emergence of a new brand assortment, which, in turn, led to the expansion of the plastics application. From a large amount of information, the most striking examples were selected, confirming trends noted by the authors.
A statistical analysis of municipal waste treatment types in European countries
Authors: İçöz Cenk , Er Fikret
Published: September 2020

In today’s world, the municipal waste management is becoming a main concern for every country and city. In environmental problems, how to collect and eliminate the municipal waste is extremely important. Different countries take different approaches towards the elimination of municipal waste and try to create policies. In this study, municipal waste treatment types for European Union (EU) and EU candidate countries is investigated. The data is taken from a report of EUROSTAT about municipal waste treated in European Union (EU) and EU candidate countries for 2012. There are 4 variables which form how municipal waste is treated in these countries. These variables are called as Recycled, Composted, Landfilled and Incinerated. Using correspondence analysis as a main statistical technique with the help of cluster analysis, a classification of the countries according to municipal waste treatment types is created.
Pengembangan Sistem Informasi Pendaftaran Seminar Akademik Di Jurusan Teknik Elektro Fakultas Teknik Universitas Lampung Menggunakan Metode Rapid Application Development (RAD)
Authors: Septama Hery Dian , Mulyani Yessi , Pratama Mahendra , Ardike Nyoman Herman
Published: September 2020

Jurusan Teknik Elektro Universitas Lampung memiliki sistem pendaftaran seminar akademik dengan proses administratif manual, terdapat kekurangan dari alur pendaftaran yang sudah ada seperti minimnya informasi yang tersaji dengan cepat dengan pengolahan data tidak terpusat di satu database menyulitkan informasi status pendaftaran, sistem seminar akademik dapat memudahkan proses administratif agar dapat diakses oleh pengguna secara bersamaan melalui browser dengan jaringan internet. Tujuan dari penelitian ini adalah untuk mengembangkan sistem informasi pendaftaran seminar akademik di Jurusan Teknik Elektro Universitas Lampung yang dapat memasukkan, mengelola, serta menampilkan data dengan baik agar menghasilkan informasi yang akurat dan tersaji dengan cepat. Metode RAD (Rapid Application Development) digunakan sebagai panduan untuk membangun sistem informasi pendaftaran seminar akademik. Pengujian dilakukan disetiap fungsi use case pada sistem, kemudian menguji sistem menggunakan metode UEQ, kepada 4 admin TU Jurusan Teknik Elektro, 22 mahasiswa Jurusan Teknik Elektro, 4 Staff IT UPT TIK Universitas Lampung, hasil pengujian sistem pendaftaran seminar akademik memenuhi fungsi yang dibutuhkan 4 aktor, dari 6 kategori menggunakan metode UEQ, benchmark yang didapat adalah 5 point mendapat nilai sangat baik dan 1 point mendapatkan nilai baik.
TEKNOLOGI PEMANFAATAN LIMBAH KULIT UDANG YANG DIOPTIMALKAN KEGUNAANNYA DALAM BERBAGAI BIDANG
Authors: Iyan Iyan , Sari Dessy Agustina
Published: September 2020

Indonesia terkenal dengan hasil maritimnya yang sangat kaya, banyak hasil laut yang bisa dikelola  dalam berbagai bidangnya seperti pangan, kosmetik dan lainnya. Kulit udang di Indonesia sebagai limbah sampingan dari produksi udang baku yang dimanfaatkan dalam aspek kehidupan. Peneliti dalam penelitiannya banyak menggunakan teknologi dan metode untuk mengelola limbah kulit udang yang tidak terpakai yang dijadikan berbagai macam hasil prodak yang bernilai. Kitin dan kitosan yang dimanfaatkan dari limbah kulit udang. Kitin dan kitosan tersebut merupakan polimer alam yang keberadaan di alam sangat melimpah. Kitin dan kitosan dapat dimanfaatkan dalam berbagai bidang misalnya industri, pangan kosmetik, dan kesehatan. Kitosan diperoleh dari mentransformasikan kitin dengan larutan basa konsentrasi tinggi, dari kitosan yang dihasilkan oleh kitin dapat memunsulkan pemanfaatan lain seperti membuat membran ultrafiltrasi untuk penyaring dalm proses pemisahan air, edible coating berperan sebagai lapisan tipis untuk menjaga buah buahan tetap segar, dan glukosamin untuk menjaga kesehatan sendi.
TEKNOLOGI DAN METODE PENGOLAHAN LIMBAH CAIR SEBAGAI PENCEGAHAN PENCEMARAN LINGKUNGAN
Authors: Suherman Suci Dhiya Mayra , Firdaus Muhammad Arif , Ryansyah Muhammad Hafidz Dwiky , Sari Dessy Agustina
Published: September 2020

Pengolahan limbah cair sebagai pencegahan pencemaran lingkungan, limbah cair memiliki tingkat pencemaran yang tinggi, limbah cair  juga mempunyai kandungan BOD dan COD yang tinggi dan bila tidak diolah akan merusak lingkungan. Kegiatan pengolahan limbah cair bertujuan untuk mereduksi volume, agar mempermudah dalam penanganan dalam pengolahan selanjutnya. Pengolahan limbah cair harus dilengkapi dengan fasilitas yang menunjang sesuai dengan ketentuan, memenuhi frekuensi dalam pengambilan sampel limbah cair, memenuhi baku mutu efluen limbah cair, dan memenuhi penataan pelaporan hasil uji laboratorium limbah cair. Berbagai metode teknologi pengolahan limbah cair telah dikembangkan seperti elektrokoagulasi, advance oxidation process (AOP), reaktor microbial fuel cells (MFCs), elektrokoagulasi, proses film mikrobiologis (Biofilm), serta rotating biological contactors (RBC), Plasma Dielectric Barrier Discharge (DBD), teknologi membran.
Pembuatan Dan Pengujian Alat Praktikum Penukar Kalor Tipe Double Pipe
Authors: Setiawan Reza , Fajar Surya Ma’rufi , Fahriani Vera Pangni
Published: September 2020

Perpindahan panas telah menjadi matakuliah dibeberapa program studi teknik diseluruh indonesia. Selain itu, matakuliah penukar kalor juga telah banyak dibuka sebagai matakuliah pilihan dibeberapa universitas. Namun, konsep perpindahan panas khususnya pada konduksi dan konveksi pada aplikasi penukar kalor yang bersifat abstak masih sulit dimengerti sebagian mahaiswa. Perlu dibuatnya alat praktikum penukar kalor untuk meningkatkan pemahaman konsep fenomena perpindahan panas konduksi dan konveksi pada penukar kalor.  Double tube dipilih karena merupakan jenis penukar kalor yang sederhana dan mudah untuk dibuat. Metode penelitian yang digunakan adalah penelitian dan pengembangan dengan alur kegiatan studi literatur, perancangan alat, desain alat, pembuatan alat, pengujian alat dan  penarikan kesimpulan. Hasil penelitian didapatkan bahwa alat penukar kalor tipe double tube yang dibuat telah bekerja baik dengan variabel-variabel dalam praktikum yang dapat diatur adalah variasi aliran counter flow dan parallel flow, variasi material tembaga dan almunium, variasi media pendingin air, oli, dan coolant, variasi laju aliran dan variasi temperatur.
PENGEMBANGAN WAHANA UKUR KECEPATAN ARUS ALIRAN SUNGAI
Authors: Martinus Martinus , Suudi Ahmad , Putra Rahmat Dendi , Muhammad Meizano Ardi
Published: September 2020

The river has potential as a power plant with indicators in the form of river flow. Flowmeter is a measuring tool used to determine of the flow.Conventional flowmeters have limited use in a wide and deep coverage area. So it was designed a new measurement vehicle for rapid movement in waters that were difficult to reach. A GPS is used to help the accuracy of the measurement location so that data is realtime. This research was conducted by developing a measurement vehicle in the form of a ship. This vehicle had a length of 84 cm, a width of 25,5 cm, and a height of 11 cm. This measuring vehicle has a flowmeter and GPS that are controlled using Arduino. The measuring vehicle has 3 stages of manufacture in the form of physical design, control design, and assembly. Field testing is done by crossing 5 points of reference that have been. The test was carried out with 3 times the data collection on 3 sides of the river. The result of this test was the floating vehicle could measure current speed with high mobility in realtime data. One of the result of water flow measurement on the flowmeter is 430.98 cm/s with error probability 12,6%.
EFEKTIVITAS LEMPUNG ALAM DAN KULIT PISANG SEBAGAI BAHAN KOMPOSIT UNTUK ADSORPSI METILEN BIRU
Authors: Susanti Indri , Santoso Agus
Published: September 2020

Penelitian ini bertujuan untuk mengetahui performa lempung alam dan kulit pisang sebagai bahan dasar pembuatan komposit untuk adsorpsi metilen biru. Preparasi adsorben lempung alam dan kulit pisang dilakukan dengan cara yang sederhana. Lempung alam dan kulit pisang yang telah dipreparasi selanjutnya digunakan sebagai adsorben untuk adsorpsi zat warna metilen biru. Pengujian adsorpsi metilen biru pada material lempung alam dan kulit pisang dilakukan pada variasi massa adsorben 0,05 ; 0,10 ; 0,15 ; 0,20 dan 0,25 gram serta variasi waktu kontak 10, 20, 30, 40 dan 50 menit. Adsorbat yang digunakan pada proses adsorpsi adalah metilen biru 20 ppm sebanyak 20 mL. Hasil Penelitian menunjukkan adsorpsi metilen biru optimum pada massa adsorben lempung alam dan kulit pisang masing-masing sebesar 0,20 gram. Sedangkan pengaruh waktu kontak menunjukkan nilai presentase metilen biru yang teradsorp optimum pada waktu 50 menit, yaitu 70,15% dengan lempung alam dan 68,55% dengan kulit pisang.
TEKNOLOGI FERMENTASI BIOETANOL DARI BERBAGAI BAHAN ORGANIK
Authors: Syeh Bima Ardana , Khoiri Alwan , Kharisma Hanny Dian , Anwari Luluatun , Sari Dessy Agustina
Published: September 2020

Bioetanol sangat dibutuhkan untuk pemenuhan kebutuhan sehari-hari. Proses produksi bioetanol dilakukan melalui teknologi fermentasi dari berbagai bahan organik, karena kegiatan fermentasi bioetanol bertujuan untuk memanfaatkan bahan organik terutama limbah organik agar limbah tersebut tidak hanya menjadi limbah semata tetapi bisa menghasilkan bioetanol dengan teknologi fermentasi. Berbagai bahan organik telah difermentasikan seperti kulit pisang kepok, rumput gajah, rumput laut, biji durian, keladi liar, jerami padi, limbah tongkol jagung, air limbah cucian beras, dan tepung ampas tebu. Hasil yang didapat berbeda-beda sebab ada beberapa faktor yang mempengaruhi kandungan kadar etanol tersebut, seperti waktu fermentasi, penambahan starter, dan lokasi pengambilan sampel
RANCANG BANGUN SISTEM PENGHITUNG JUMLAH DAN MASSA BIJI KOPI BERBASIS MIKROKONTROLER PADA KONVEYOR SABUK
Authors: Martinus Martinus , Telaumbanua Mareli , Muhammad Meizano Ardi , Susilo Adi
Published: September 2020

Kebutuhan manusia semakin lama semakin meningkat, berkembang dan bervariasi, untuk memenuhi kebutuhan tersebut industri membutuhkan suatu alat yang dapat mengontrol dan mengendalikan proses permesinan secara otomatis. Diantaranya industri yang memerlukan pengendalian kualitas secara otomatis adalah industri makanan dan minuman instan. Di Indonesia, industri minuman didominasi oleh hasil olahan minuman instan bubuk dan cair. Salah satunya minuman instan kopi, minuman kopi membutuhkan beberapa tahap pengolahan, salah satu yang terpenting adalah proses pemutuan biji kopi. Saat ini industri masih menggunakan tenaga konvensional yang memakan waktu, biaya, tenaga operator. Penentuan mutu dengan cara seperti ini mempunyai kelemahan dari sisi subyektivitas yang memungkinkan terjadinya kesalahan akibat kelelahan mata manusia terhadap contoh yang dianalisis. Untuk menanggulangi masalah tersebut perlu adanya mesin pemutuan biji kopi dengan sistem otomasi berdasarkan parameter besar dan kecilnya biji kopi. Dengan cara menghitung banyaknya biji kopi pada sampel 300 gram biji kopi. Penyelesaian rancang bangun ini dilakukan dengan 2 tahapan yaitu perancangan konveyor sabuk dan perancangan otomasi. Perancangan konveyor sabuk pemilah terdiri dari pemilihan konsep, desain rinci menggunakan aplikasi Solidwork dan proses pembuatan berdasarkan desain. Selanjutnya, perancangan otomasi menggunakan mikrokontroller Arduino Uno, sensor load cell dan sensor FC-51. Setelah peralatan sudah dipasang semua selanjutnya dilakukan pengujian didapatkan dari 300 gram biji kopi terhitung jumlah biji kopi yang bervariasi yaitu 907, 954, 976, 1007, dan 1036 biji kopi. Kemudian, ketinggian sensor yang optimal 6 cm dari permukaan belt conveyor dan kecepatan conveyor 1,52 m/menit agar pembacaan sensor FC-51 akurat.
Simulasi Proses Bending Arm Rear Brake dengan Variasi Kecepatan Pembebanan Terhadap Stress Material Menggunakan Ansys
Authors: Setiawan Reza , Putra Rieval Ade , Fahriani Vera Pangni
Published: September 2020

Proses pembuatan Arm Rear Brake atau tuas rem belakang motor masih banyak di temukan produk yang tidak sesuai dengan standar mutu. Kegagalan sering terjadi pada proses produksi Bending 1. Faktor kegagalan proses Bending 1 disebabkan oleh kecepatan pembebanan material yang tidak sesuai atau pressure pembebanan yang terlalu besar. Simulasi analisis ini bertujuan untuk menentukan kecepatan pembebanan Bending 1 pada Arm Rear Brake jenis KWBA agar tidak mengalami tegangan lebih dan kerusakan material. Metode penelitian yang digunakan adalah simulasi dengan tahapan studi literatur, studi lapangan, pembuatan desain, simulasi dan kesimpulan. Hasil simulasi menunjukan dari variasi kecepatan pembebanan 15 m/s, 20 m/s dan 25 m/s pada proses Bending 1 didapatkan kecepatan pembebanan yang terbaik adalah 20 m/s dengan perbandingan maximum tegangan (stress) material dan tampilan visual material setelah diproses.
Requesting and Refusing Politeness Expression Teacherâ€™s Instruction in Teaching Learning Process
Authors: Damanik Bernieke Anggita Ristia
Published: September 2020

This research conducted to describe the request and refusal polite expression when teacher instruct students. The writer has chosen English teacher and the object is 1 teacher. The writer joins in the class and records the activities when teachers teach students. The data analyzed by using qualitative method. The types of politeness are based on the Brown and Levinsonâ€™s theory about politeness strategy that should people use when they instruct others. There are 24 male students and 30 female students who are follow this research. The research instrument to collect the data is through observation the conversation during learning and teaching process. All the utterances relate to politeness strategy produced by the students and teacher write down and 2 conversations are chose to be analyzed based on politeness strategies The result of this research shows that there are three types of instructional activities; motivating students (1 expression), informing students of objective (1 expression), helping students recall prerequisites (1 expression), presenting information and example (1 expression) and providing practice and feedback (7 expressions). Teacher used four types of them, Bald on Record (4 expressions), Positive Politeness (16 expressions), Negative Politeness (6 expressions), and off- record (2 expressions). There are 3 expressions are polite requests and no impolite refusal. From that result, the writer concludes that teacher often to use Positive Politeness by reasoning that it types of politeness strategy is to make the relationship between teacher and students more intimate during teaching learning process. This research can lead other researcher to conduct research on Politeness strategy. It also can lead the teachers and the students to make a good interaction by applying the politeness strategy in the classroom so that they can maintain a good communication one another
The Implementation of Field Trips as Edu-Tourism to Improve Studentsâ€™ Speaking Ability at University Level
Authors: Harahap Dina Irmayanti , Firdaus Firdayanti
Published: September 2020

Field trip programs as edu-tourism in university level were viewed as the great equalizer in terms of delivering students to cultural heritage awareness. So, they had seen these experiential learning as a central of educational mission. Higher level education especially university which implemented field trip programs as supporting activities in the English for tourism lesson was gladly endured the expense and disruption of providing field trips as the primary purpose to provide a learning opportunity. The aim of this study was to evaluate the implementation of educational field trips as edu-tourism at university level. This is a qualitative study which is carried out by survey and observation. The population of this study is the English Department students of Potensi Utama University. There were 150 respondents in this research which included of 50 teachers and 100 students were randomly selected. The instrument of this study used questionnaires and speaking test items. The questionnaire consisted of 30 items. The collection of in this research were analysed by using simple percentage method. The place for field trip activity was held in the ecotourism of Bukit Lawang, which located at Bahorok sub-district, Langkat Regency, North Sumatera, Indonesia. The result of this study hoped that educational field trips are helpful to cope up with advance learning to develop studentsâ€™ interest especially speaking ability.
Derechos y subjetividades en la producción colectiva del Gran Buenos Aires: sobre la política de la vida (digna)
Authors: Manzano Virginia
Published: September 2020

En experiencias y definiciones en torno al hábitat en el Gran Buenos Aires se asignan valores a la vida para fundar la política en los barrios populares. En un estudio antropológico y colaborativo con residentes de asentamientos populares, a partir del cual reconstruimos trayectorias de vida, prácticas cotidianas y debates colectivos, pudimos establecer que la vida entendida como vida digna funda proyectos éticos para enfrentar dilemas acerca de cómo vivir juntos, cómo procurar el bienestar y cómo asegurar la felicidad. Para dar cuenta de ello, me concentraré en el análisis de la configuración situada de un lenguaje legal para reivindicar la ciudad y en las relaciones afectivas y éticas que constituyen formas singulares de subjetividad. Este enfoque permite debatir nociones restringidas de lo público, que contraponen la polís, como lugar de construcción de diferencia, al mundo doméstico asociado con la necesidad.
¿El ciberactivismo en un solo “clic”? Ilustración del uso de las redes sociales digitales para la acción colectiva
Authors: Ponce Silva Michelle Natalie
Published: September 2020

La tecnología es cada vez más parte de nuestro cotidiano vivir. La existencia de nuevas TIC, modifica las formas tradicionales en las que el ser humano actúa en la realidad. Esta problemática ha sido ampliamente trabajada en la literatura y el cine; sin embargo ¿cómo puede abordarse este tópico desde la academia? Este trabajo, pretende ilustrar la construcción de modelos, a través el abordaje teórico y los datos empíricos de la investigación sobre: La compensación de la acción colectiva mediante la interacción en las redes sociales digitales, caso de estudio: “Día de la mentira” (21F).
Discursos sobre los roles de las mujeres en periódicos tarijeños durante la Guerra del Chaco
Authors: Olarte Karina
Published: September 2020

La historia, la cultura, el periodismo y las mujeres en momentos históricamente importantes contribuyen a la reconfiguración de roles y discursos tradicionalmente establecidos, reconocidos y configurados en las producciones periodísticas del país. La presente investigación busca identificar cómo se representaba a las mujeres en los periódicos locales de la ciudad de Tarija, Bolivia durante la tercera década del siglo XX, periodo que corresponde a la Guerra del Chaco. Para dicha explicación, la metodología empleada consiste en el análisis de dos periódicos de la época. Entre los resultados de la presente investigación son visibles tanto los roles tradicionales de género como aquellos establecidos por la sociología y la psicología respecto a las mujeres. Estos hallazgos dan evidencia de un vínculo históricamente situado en el que la sindicalización, la incorporación de las mujeres al ámbito productivo y la línea periodística de cada impreso generaron un discurso diversificado que resalta la importancia del rol de las mujeres en esta época.
Comunicación horizontal para la socialización de derechos y obligaciones estudiantiles en la Universidad
Authors: Paucara Lola
Published: September 2020

La presente investigación se concentró en comprender y analizar cuánto se conocen los derechos y obligaciones estudiantiles en la carrera de Ciencias de la Comunicación Social de la Universidad Mayor de San Andrés, con el fin de plantear la construcción de un proceso de comunicación horizontal que viabilice el mejoramiento de la socialización de esta información en el contexto universitario. Para este fin, se han empleado técnicas mixtas, tanto cuantitativas (encuestas), como cualitativas (entrevistas y observación). Los resultados reflejan la existencia de un bajo nivel de conocimiento de reglamentos estudiantiles por parte de los alumnos, lo que es perjudicial para su rendimiento académico y para su participación política en instancias de decisión. La resolución de estos factores adversos parte de una optimización sistemática de la calidad de acceso a la información, basada en las necesidades objetivas de la propia comunidad estudiantil.
Viscarra, Nietzsche: Las virtudes del genio y la comunicación de la “cultura superior”
Authors: Choque Osman
Published: September 2020

El escritor boliviano, Víctor Hugo Viscarra, es una figura en la que han centrado su atención un buen número de lectores. Reseña tras reseña de su obra, fue apareciendo en la prensa boliviana y, en ese sentido, los lectores han tomado sus escritos con una aceptación ciega, omitiendo de tal modo una postura que supere la frontera literaria. Es dudosa la existencia de algún trabajo acerca de los aportes de Viscarra como pensador, sus opiniones de la política, de las costumbres de la sociedad o de los imaginarios e identidades en el territorio boliviano. Este trabajo pretende, por un lado, hacer un recorrido crítico al pensamiento de Viscarra a partir de una mirada filosófica (inspirada particularmente en Friedrich Nietzsche) y, por otro lado, situar la figura de Viscarra como un “crítico de la sociedad” y analizar si cuenta con aquellas virtudes que debería tener un genio según el filósofo alemán. ¿Qué expresan las ideas de Víctor Hugo Viscarra? ¿Es posible encontrar en sus escritos una crítica a la forma de pensar, vivir y actuar de la sociedad boliviana actual? Responder a estas preguntas es la intención de este trabajo.
Burguesías cholas y capitalismo boliviano
Authors: Toranzo Carlos
Published: September 2020

Este artículo dará una mirada panorámica al tema de las burguesías cholas, articulando ese fenómeno con la forma en la que opera el capitalismo boliviano; cada uno de los acápites es una suerte de hipótesis sobre la cuestión descrita (que pretendo desarrollar en futuros textos). El ensayo discute las diferentes nociones de lo que se ha denominado “burguesías cholas” y ofrece una interpretación de su relación con el proceso de construcción social y económica en Bolivia.
PROJECT FINANCING RISK ASSESSMENT TECHNOLOGY
Authors: Bilak Yu. , Bilak I. , Varha S.
Published: September 2020

The paper presents the technology of obtaining a quantitative assessment of the risk of financing projects at the stage of business expansion. The technology on the one hand uses quantitative assessments of the project on different indicators and on the basis of different models, and on the other hand uses the experience, knowledge, and competencies of experts in the subject area. The model uses a neuro-phase network of deep learning, increases the accuracy and objectivity of assessment.
Preload Effect Elimination Technique for Piezoelectric Force Touch Sensing in Human-Machine Interactivities
Authors: Shi Jiahui , Chen Junliang , Lin Jingjing , Gao Shuo
Published: September 2020

Piezoelectric touch sensing in interactive
displays gains increasing attentions due to its high force detection
sensitivity and intrinsic mechanical-to-electrical conversion ability. However,
the instable force-voltage responsivity induced by preload effect of
piezoelectric materials reduces the force detection accuracy of secondary force
touches, which is important to touch and haptic applications such as peek-pop. To address this issue,
in this article, we present a preload effect elimination technique, in which
the relationship between the piezoelectric coefficients and static preload is
studied first, and then the detected secondary force touch is calibrated by
using the previously applied static force information. Experimental results
demonstrate that the force detection accuracy is boosted by 15.17% after applying
the developed technique to secondary force touches with different preload
values, potentially allowing the system to precisely interpret secondary force
touch amplitude and hence enhancing the development of touch sensing in
interactive displays.
The Study Of Potential Agroecosystems And Management In Watershed Of Indragiri In Sangau Village District Kuantan Mudik
Authors: Seprido Seprido
Published: September 2020

Penelitian tentang kajian potensi agroekosistem dan pengelolaannya di kawasan DAS  Indragiri di desa Sangau Kecamatan Kuantan Mudik ini bertujuan untuk mengidentifikasi unsur-unsur agroekosistem DAS dan mengkaji permasalahan yang ada pada kawasan DAS Indragiri sebagai informasi untuk menentukan langkah-langkah alternatif untuk optimalisasi pemanfaatan kawasan DAS Indrgiri yang berkelanjutan di Desa Sangau.  Penelitian ini dilakukan dengan mengumpulkan data primer dan sekunder yang dilaksanakan pada bulan Februari –April 2017. Pengumpulan data primer dilakukan dengan metode survey yakni dengan melakukan survey kelapangan serta wawancara dengan masyarakat seedangkan data sekunder didapatkan melalui penelusuran internet. Analisi yang digunakan adalah kombinasi deskriptif dan eksploratif. Hasil penelitian menunjukan bahwa kegiatan pertanian sangat berpotensi untuk dikembangkan pada areal DAS Indragiri di Desa Sangau. Adanya sikap yang kurang proaktif dari masyarakat serta belum sesuainya dengan prinsip prinsip berkelanjutan menyebabkan penurunan produksi pada sector pertanian ini. Pemanfaatan daerah aliran sungai dengan mengikuti konsep agroekosistem dan melibatkan peran stakeholder dapat meningkatkan potensi agroekosistem dan juga dapat memberikan manfaat peningkatan ekonomi dan keberlanjutan lingkungan bagi masyarakat.
Correlation and Path Analysis Quantitative Character of 20 Genotype Chilli (Capsicum annuum L.)
Authors: Yunandra Yunandra , Syukur Muhamad , Zuhry Elza , Deviona Deviona , Deviona Deviona
Published: September 2020

ABSTRACT

Chili high yield is the target of plant breeding. High yielding chili selection can be done through direct selection of yield characters and indirectly through other characters. Indirect selection is more efficient than the selection of one character. This research aims to study the relationship between quantitative characters with yield as well as obtaining the selection criteria. Correlation analysis results showed that the fruit weight, fruit diameter, pericarp thickness, leaf width, and leaf length were positively correlated and were very significant on yield. Based on the path analysis, characters that have a positive direct effect on yield are fruit weight, fruit diameter, leaf width, and leaf length, while pericarp thickness had a negative direct effect but had a large indirect effect on yield.
Isolation And Identification Of Carried Seed Fungus Acacia crassicarpa A. Cunn. Ex Benth
Authors: Kurniati Era Kurniati , Zul Delita , Tjahyono Budi
Published: September 2020

Penyakit yang disebabkan oleh cendawan pada bibit Acacia crassicarpa (Akasia) sangat berpotensi menimbulkan kerusakan pada bibit dan dapat terbawa benih. Bentuk kerusakan karena serangan patogen sangat bervariasi, bergantung pada jenis patogen, benih dan faktor lingkungan. Oleh karena itu dilakukan penelitian yang bertujuan untuk isolasi dan identifikasi patogen terbawa benih Akasia. Benih yang digunakan sebagai sumber isolat yaitu benih yang disimpan di Dry Cold Storage (DCS) dengan tahun panen benih 2012, 2015 dan 2016. Isolasi cendawan dari benih dilakukan dengan meletakkan benih di atas medium agar PPA dan dipurifikasi pada medisum PSA. Karakterisasi secara mikroskopik menunjukkan bahwa cendawan yang diisolasi terdiri dari  4 genus, yaitu Aspergillus, Rhizopus, Penicillium dan Fusarium. Isolat yang secara mikroskopis termasuk genus Fusarium diidentifikasi secara molekuler berdasarkan Internal Transcribed Spacer (ITS). Hasil BLAST menunjukkan bahwa sekuen (ITS) isolat 2012 dan 2016 dengan ukuran 570-580 bp memiliki kemiripan paling dekat dengan cendawan kelompok Fusarium sp. Nilai max identity isolat uji sebesar 88,87% (isolat 2012) dan 87,55% (isolat 2016). Hasil uji patogenisitas cendawan Fusarium sp. secara in vitro menunjukkan bahwa tidak ada gejala nekrosis yang muncul selama pengamatan. Dapat disimpulkan bahwa Fusarium yang diisolasi diduga tidak bersifat patogen.