Corrosion study of pipeline material for seabed sediment in tropical climate

Corrosive environments such as marine sediments can cause corrosion to steel pipelines at any time when certain conditions are met. Seabed sediment could cause severe corrosion damage due to its corrosiveness to the pipelines buried under it. Many consequences could take place in case if there is incident in oil/gas pipelines. Successfully identifying elements of corrosion in marine sediment would enhance the future of steel structure protection and monitoring systems. This article focuses on the behaviour of corrosion rate of steel located near shore environment and the aim is to determine the effect of sediment on corrosion of steel. To investigate that, simulated near shore sediment conditions have been used where the steel coupons buried in sediments which have different characteristics. Weight loss technique has been implemented to determine the weight loss rate of the steel specimens. Based on the results of this study, metal weight loss increases as the duration of exposure to seabed sediment environment become longer. The sea sediment simulated condition has given significant levels of corrosion. Conclusively, the corrosion rate of steel in seabed sediment located in tropical region is complicated and further studies are suggested

Analisis Perilaku Konsumen dalam Membeli Sepeda Motor Yamaha Mio pada PT. Alfa Scorpii Teluk Kuantan

Consumer behavior is very important for a company, to study consumer behavior will greatly assist the company in identifying the market so that market segment would more effective. Study consumer behavior will also be able to know how consumers in the purchase decision process the factors that influene. The purpose of this study was to determine the basis of consumer behavior in the purchase of motorcycles yamaha mio at PT. Alpha Scorpii, Teluk Kuantan.The method used in this research is descriptive quantitative method. The sampling technique used was accidental sampling with a population of 941 people and the number of samples is 90 respondents. The data were obtained through interviews and questionnaires that measured using a Likert scale.The results of this study indicate that the analysis of consumer behavior in buying a motorcycle yamaha mio at PT. Alpha Scorpii shows the criteria agreed.Keywords : analysis, consumer behavior, consumer behavior factors

Survey of irrigation area using micro unmanned aerial vehicle (micro-UAV) in Gumbasa irrigation area

This study aims to develop a new approach in doing evaluation of irrigation system in terms of getting accurate data at a reasonable cost in an essay and fast manner. The research was done at Gumbasa Irrigation District in Sigi, Central of Sulawesi, Indonesia on May-June 2015. The workflow consists of: (i) preparation; (ii) flight planning; (iii) automated flight; (iv) data processing. Data analysis was done by comparison between Red Green Blue (RGB) method and Near Infra Red Green Blue (NirGB) method. The results show that the use of micro-UAV provide an efficient way to collect data needed to manage a very large irrigation system. The RGB image can be effectively used to identify crop’s condition on an irrigation area, which is needed to plan irrigation efficiently. The NirGB image can be effectively used to assess tertiary and secondary level of irrigation canal such as leakage.Jabal Tarik Ibrahim, Nugroho Tri Waskitho, Wahono, Sitti Rahma Ma’mu

Pengembangan Bahan Pembelajaran IPA Berbasis Biotechnopreneurship untuk Melatih Life Skills Siswa SMP

This study aims to produce biotechnopreneurship-based science learning materials that are valid, practical, and effectiveto facilitate junior high school students\u27 life skills. This research is development research using a 4D development model that produces Biotechnopreneurship-based science learning materials equipped with the syllabus, lesson plan, student worksheets, life skills tests. Learning materials were tested on 35 junior high school students with the one-group pretest-posttest design. Data analysis is descriptive qualitative with the results: (a) validation of learning materials with valid categories (score 3-4); (b) readability of learning materials with good categories (c) implementation of learning in good categories (score 3.7); (d) student responses were positive; (e) students\u27life skills generally increase (N-gain 0.71 with high category). The indicator of Life Skills that experiences the most significant increase between pre test and post test is the aspect of making a decision. Indicators of information gathering are indicators that have a low increase after learning. Based on the results of the study it can be concluded that the biotechnopreneurship-based science learning materials are valid, practical, and effective to facilitate junior high school students\u27 life skills

Studi Etnofarmasi Suku Dondo Kecamatan Dondo Kabupaten Tolitoli Sulawesi Tengah

This study aims to inventory and to record plants and their parts used as medicine by Dondo Tribe in Dondo Subdistrict, Tolitoli Regency, Central Sulawesi. This research is a descriptive study using qualitative methods and snowball sampling technique through open-ended interviews to 4 informants using questionnaire. The results showed that 56 plant species divided into 32 familia were used as medicine. The most widely used plant was from Euphorbiaceae family as much as 11%. Parts of plant which were used included leaf, petiole, stem, bark, flower, fruit, seed, rhizomes, tuber, and herb. Part of plant widely used was the leaf with percentage of utilization as much as 62%. The people of Dondo Tribe in Tolitoli District use the plants for treatment of illness, recovery, and maintenance of health. The methods of processing included decocting, mashing, roasting, burning, squeezing, and brewing the parts of the plant. The ways of using included drinking, eating, chewing, smearing, dropping, affixing/compressing, attaching, and rubbing the plant preparations on the sore spot as well as inhaling the fumes, and mixing it with water for bathin

Studi Etnofarmasi Tumbuhan Berkhasiat Obat pada Suku Buton di Kecamatan Binongko, Kabupaten Wakatobi, Sulawesi Tenggara

Herbal plant ethno pharmacy study in Butonse has been coducted from January to april2014 in Binongko Sub-districtm Wakatobi Regency of South East Sulawesi. This research aimed tofind out various species and plant organs used, kinds of diseases healed, and the way to use the herbalplants by Butonese in Binongko Sub-district. This was a descripive research using qualitativemethod.The sample was taken through snowball technique with 17 informans by using questiomnaire.Based on the research result, it was obtained 53 species of plants and divided into 35 families thatused as medicine.The most used plants were family of Euphorbiaceae of 6 species. It was found 3kinds of unique plants used such as tali putri, daun picah, and kayu kuda. The organs used were leaf,fruit, stem, tuber, root, rhozome. Latex, flower, stem skin, and wood skin. The most used plant\u27sorgan was the leaves of 56%. The wey is by boiling, pounding, chewing, squeezing, slicing, smearing,burning, dropping, soaking, consuming directly, gratting, attachng, and having smoke. The most wayused is by boiling and pounding for 34% each