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PEMODELAN SEBARAN BOD DI SUNGAI KAPUAS KECIL BAGIAN HILIR MENGGUNAKAN WASP
No full textThe Kapuas Kecil River must be maintained for its water quality so that it can still be utilized in accordance with its designation. The purpose of this study is to predict water quality changes due to incoming waste from various sources of pollutants to the concentration of BOD in Kapuas Kecil River using WASP model as an effort to water quality monitoring and water pollution control.The study area to be simulated is Kapuas Kecil River passing through Pontianak City over ± 22 km from upstream to downstream (estuary) that divided into 42 segments. Water quality data were collected from several monitoring station locations in Kapuas Kecil River downstream, Landak River, effluent trenches located within the administrative area of Pontianak City, as well as secondary data on industrial effluents located along the study area. Water sampling method refers to the SNI 03-7026-2004, sampling was done once at each sample point with variations of the rainy and dry season, and at high and low tide conditions. Hydrometry data and river discharge can be obtained from primary and secondary data.The results showed that domestic and non-domestic of urban discharges that entering the river is very dominant influence on the water quality of the river. BOD concentration in rivers during the dry season is higher than rainy season both in high and low tide conditions. The simulation results of spatial distribution with all scenarios show that the accumulation of BOD pollution load begins after a distance of 5 km from the upstream boundary and then a significant increase in concentration occur at segment 27 with loads originating from the Landak River and Pekong Trench. The BOD concentration then tends to fluctuate to a distance of 5 km before heading downstream, and after that it continues to decline towards the downstream
Faktor Penentu Produksi pada Perkebunan Rakyat Kelapa Sawit di Kabupaten Mamuju Utara
No full textThere are three patterns of smallholder oil palm plantation in North Mamuju regency, ie plasma, IGA (Income Generating Activity), and mandiri (independent). Independent smallholder plantations are plantations managed by the community themselves without the involvement of others. While the partnership patterns can be divided into plasma and IGA. The partnership is a form of fostering of smallholders plantations by large private plantation in this area. This study aims to determine the amount of oil palm production on smallholder plantations and the factors that affect.This research was conducted in North Mamuju Regency, West Sulawesi Province which has the widest smallholder oil palm plantation in Sulawesi Island with various pattern. Four villages in two sub-districts were chosen purposively consideration with having three patterns of smallholder plantations. Farmer samples were taken using the snowball method after stratification of the pattern was carried out. Data analysis was performed with Cobb-Doulas function model in the normalized logarithm, using Eviews 6 software. These findings are the average production of 56,840 kg, with productivity of 20,300 kg/ha. Input of land area, NPK fertilizer, age of oil palm crops, outside family labor, frequency of estate sanitation and distance of estate to river is the determinant input to production. Input land area is found as the most elastic input. However, land use for oil palm plantations should still refer to existing legislatio
ELECTROSPUN BIOMATERIALS AND RELATED TECHNOLOGIES
No full textElectrospun Biomaterials and Related Technologies is a multi-contributed book containing review articles from worldwide authors with industry and academic background. This book is aimed to deliver a compiled overview in biomaterials electrospinning, including strategies, relevant technologies, and state-of-the-art research. The editor, Jorge Almodovar, has chemical engineering background with extensive research experiences and focus on engineering of biomimetic materials. The book consists of nine chapters in 282 content pages. Arranged in a concise format, it delivers a comprehensive but not exhaustive reading text. The chapters cover broad range of topics in electrospinning field, including process reproducibility and robustness, fibrous collagen scaffold, cellulose-based biomaterials, biopolymer nanofibres, green electrospinning, electrospun materials for cancer research, nanofibrous nerve conduits, scaffold for retinal tissue engineering, and smart material. These topics are mainly related to biomedical applications, but studies on environmental engineering are also conferred
STUDI PENGARUH JARI-JARI DALAM MAGNET TERHADAP TEGANGAN GENERATOR AKSIAL PADA BAHAN CAKRAM AKRILIK
No full textThe high cost of making rotor discs is one aspect that becomes an obstacle in the implementation of axial generator research. This study aims to compare acrylic discs with wooden discs in terms of axial generator output voltage and production costs, so that further research can use alternative discs with lower cost. This study uses an experimental method, where this method is used to find existing variables. On a generator with an acrylic disc, the average voltage is 16.6 volts with a manufacturing cost of 151,500 rupiah. Whereas on generator with wood disc, the average voltage is 17.2 volts with a manufacturing cost of 48,750 rupiah. Thus wood disc can be an alternative material in making cheap axial generator rotor discs
EFEKTIFITAS PENAMBAHAN MEDIA GEOTEKSTIL PADA SARINGAN PASIR LAMBAT TERHADAP PENYISIHAN PARAMETER KEKERUHAN, JUMLAH COLI DAN COD
No full textSlow sand filter processing is done by separating raw contaminant water which is passed slowly on sand. Fluctuating raw water quality resulted in the schmutzdecke layer not growing optimally. Therefore, it is needed media that help the performance of the sand filter. One of the media used is geotextile. The geotextile is useful as a medium to optimize the growth of microorganisms in the schmutzdecke layer. Geotextiles have similar surface structures such as sand filters as well as their pores. The purpose of this study was to determine the effectiveness of adding geotextiles in reducing turbidity parameters, number of coli and COD. This study used slow sand filter reactor with a continuous flow system of 0.3 m3 / m2.jam for 7 days. Based on the research, the addition of geotextile media is quite effective and can improve the performance of slow sand filter. Percentage of turbidity removal reached 94.27%, coli 99.40% and COD 92.85%. COD values tend to be dynamic as raw water conditions. Geotextiles is quite helpful in growing a layer of schmutzdecke because the structure resembles sand so as to increase the number of bacteria bed filters
YOGYAKARTA CITY TRANSPORT SERVICE PLANNING FOR INTEGRATION WITH EXISTING TRANSPORT
No full textThe presence of tourist buses is considered to be a factor in Yogyakarta’s traffic congestion in long holiday season. Research was conducted to plan a tourism transportation, called Trans Jogja Wisata that is integrated with other public transport services to accommodate tourist movement from park and ride locations to tourist attractions. Data collection was done by carrying out surveys and interviews at a parking location in Yogyakarta. The data collected included tourist destinations, bus gateways to Yogyakarta, and environmental conditions. Based on the analysis results for planning Trans Jogja Wisata’s integration with existing public transport, there are four designated routes that can be used to accommodate tourists in getting to their destinations: Route 1, Route 2, Route 3, and Route 4. These routes are fully integrated with the Trans Jogja bus system, becak or pedicabs, andong or horse drawn carriages and Si Thole mini buses
EDITORIAL
No full textSekolah Pascasarjana Universitas Gadjah Mada mempunyai berbagai program studi yang berbasis keilmuan dalam bidang teknologi, agronomi serta kesehatan. Hal tersebut menjadikan Sekolah Pascasarjana UGM sebagai salah satu tempat untuk berkembangnya ilmu-ilmu lintas disiplin. Keragaman program studi menjadi bukti bahwa Sekolah Pascasarjana UGM menunjukkan kepeduliannya terhadap permasalahan dalam kehidupan manusia yang serasa tidak pernah ada habisnya. Harapannya semoga hasil penelitian yang ditampilkan melalui penerbitan ini dapat memberikan kontribusi akademik serta solusi terhadap permasalahan dalam kehidupan. Sesungguhnya untuk setiap penerbitan, tim redaksi selalu berusaha keras untuk meningkatkan mutu serta kualitas penerbitannya. Walaupun tidak dapat dipungkiri bahwa pada penerbitan ini tentu juga masih ada kekurangannya. Ucapan terima kasih yang tidak terhingga kepada semua pihak yang telah meluangkan waktu, tenaga serta pemikiran untuk ikut terlibat dalam penerbitan ini. Akhir kata selamat membaca, semoga bermanfaat bagi pengembangan ilmu pengetahuan serta memperluas wawasan akademi
Analisis Niat Penggunaan Knowledge Management System pada Perusahaan Pupuk di Indonesia
No full textPT ABC is one of the state-owned companies and one of the fertilizer producers in Indonesia. At present PT ABC has implemented a Knowledge Management System (KMS) in Human Resources Department. KMS serves as a tool for employees to consult in various fields regarding knowledge sharing, as a source of information and administration processes for payroll, leave, pensions and others. However, the existence of KMS is unable to guarantee the employees feel helped, for example, old employees who do not understand technology will have difficulty running KMS and some employees are not accustomed to dealing with information technology because they are used to consulting with humans. To measure the level of KMS acceptance for employees at PT ABC, this research uses the Chorng-Shyong Ong model which is a Technology Acceptance Model (TAM) model by utilizing the Power Issues.The purpose of this study was to find out the level of KMS acceptance in PT ABC based on the perspective of employees by identifying the basic factors, which affect cognitively and affectively to increase the internal beliefs, attitudes, and employee intention to use KMS through the recommendations given for the system improvement. And the results of this study indicate that the factors of perception to the usefulness, perceived ease of use, and the influences of others positively influence the intention to use KMS in PT ABC. There are only 3 of 7 hypotheses were accepted in accordance with the conditions that exist in PT ABC for the implementation of KMS. Of the 3 hypotheses accepted, the recommendations for improvement are derived based on the employee's suggestion in open questionnaires
ESTIMASI PRODUKSI JAGUNG (Zea Mays L.) DENGAN MENGGUNAKAN CITRA SENTINEL 2A DI SEBAGIAN WILAYAH KABUPATEN JENEPONTO PROVINSI SULAWESI SELATAN
No full textProduction is a real benchmark in successful crop management which is the most important output economically. Currently, corn production estimates are generally done by conventional means through field surveys. This conventional way requires a high cost and a long time. Appropriate agricultural management requires precise and accurate information or data to increase production and economic benefits. Sentinel 2A remote sensing satellite data is potential to be used in assessment of corn production estimation. The purpose of this research is to make land use mapping and corn production estimation by using spectral approach. Estimated data were obtained from Sentinel 2A image by mapping land use and modeling of vegetation index (NDVI, SAVI, MSAVI, TSAVI, EVI, and ARVI) then compared with data of corn production in the field. The result of data analysis shows land use mapping using Sentinel 2A image has 91% confidence level. Calculation of production estimation can show the accuracy of 74% with RMSE 0.69. The highest correlation is estimated production with EVI index model with regression correlation equal to 74% which shows strong correlation on both variables. Estimated production of corn in 2017 in Jeneponto Regency is 178,660,69 tons
KARBOKSIMETIL KITOSAN MEMPERPANJANG DAYA SIMPAN FILET NILA MERAH YANG DISIMPAN PADA SUHU RENDAH
No full textKitosan diketahui memiliki aktivitas antibakteri, biodegradable, dan biokompatibel tetapi tidak larut dalam air. Modifikasi kitosan menjadi karboksimetil kitosan diharapkan mampu meningkatkan kelarutan dalam air tanpa mengubah bioaktivitas sehingga memungkinkan aplikasi sebagai antibakteri. Penelitian ini bertujuan mengkaji pengaruh pemberian karboksimetil kitosan sebagai bahan antibakteri terhadap daya simpan filet nila merah yang disimpan pada suhu dingin. Karboksimetil kitosan dibuat dengan cara mereaksikan senyawa kitosan dengan asam monokloroasetat pada suhu 900C selama 3 jam. Sampel filet nila merah segar direndam dalam larutan karboksimetil kitosan dengan konsentrasi 0%; 2%; 3% dan 4% selama 60 menit, kemudian disimpan pada suhu dingin 50C selama 12 hari. Parameter yang diamati tiap 4 hari yaitu Total Plate Count (TPC), Total Volatile Base (TVB), pH dan uji skoring. Hasil penelitian menunjukkan bahwapenggunaan konsentrasi karboksimetil kitosan yang berbeda memberikan pengaruh nyata (