Sampling Design for Water Quality Monitoring in Marine Reserve : a Study Case at Banda Sea Conservation Park

Design of sampling site water quality monitoring at marine reserve is critical, to optimize the effectiveness of periodic assessment. A simple stratified systematic design, that been usually used in most of monitoring anlaysis, may not maximize the information of spatial data in marine hydrology. The present work applied a multivariate statistical analysis and spatial autocorrelation methods to develop an optimal sampling design for water quality assessment in tropical marine reserve, Banda Sea Conservation Park, Indonesia. Seasonal (west, intermediate, and east monsoon season in Indonesia) and spatial (38 stations) water quality analysis (Salinity, Dissolved Oxygen, pH, and nutrient) in 3 zones of Marine Reserve were conducted. Principal Component Analysis (PCA) showed Dissolved Oxygen (DO) was the principal variable for the sampling design criterion. Spatial DO Variograms showed relocation of the sampling stations, to optimize the design of water quality monitoring. Therefore, even the principal variable may vary at other locations, depends on hydrology and other area specific characteristics, the proposed technique could be applied in sampling design concerning hydrology monitoring

Application of a Multispectral SPOT Image for Land Use Classification in Sampean Watershed

This article described the process of land use classification at Sampean Watershed. The research was conducted in Sampean watershed to calculate the land use area using a multispectral SPOT image. Two SPOT image scenes were used to identify and classify the main nomenclature of land use. The research applied level 2A of SPOT image raw data which were obtained during 2004. Research methodology consisted of geometric correction of Image; image enhancement using high sharpen filter; un-supervised classification and supervised classification. The classification algorithm used the maximum likelihood in which pixels was classified based on their spectral signature. Severaltraining areas were identified to define the region area. Supervised classification could classified 9 class of land uses, the classification of land use consist of irrigated paddy field (56.05%), rain fed paddy field (0.89%), forest (10.75%), urban area (8.69%), plantation (4.22%), barren land (11.19%), river (0.05%), cropland (7.98%), and bushes (0.19%). The overall classification accuracy was 84.21%. This work will be useful for hydrological modelling and management planning of the Watershed

Karakteristik Cerobong Boiler Industri Di Propinsi Jawa Tengah Sebagai Bentuk Upaya Pentaatan Pengelolaan Lingkungan

Industri dalam proses produksinya tidak lepas dari pemakaian bahan bakar baik minyak, batubara, maupun gas untuk menjalankan unit proses yang ada, dari mulai heater, boiler, oven, generator set (genset) sampai incenerator dimana dalam pembakaran menghasilkan emisi. Emisi ini dikeluarkan ke lingkungan melalui cerobong udara, dimana pembangunannya mengacu dalam Keputusan Kepala Bapedal Nomor Kep. 205/ Bapedal/ 07/ 1996 tentang Pedoman Teknis Pengendalian Pencemaran Udara. Penelitian ini bertujuan untuk mengetahui gambaran cerobong di wilayah Propinsi Jawa Tengah dalam 4 level keterlaksanaan pemantauan kualitas udara sebagai bagian kriteria aspek pentaatan dalam PROPER. Metode yang digunakan adalah deskriptif kualitatif. Lingkup penelitian dibatasi pada 30 cerobong boiler industri di Propinsi Jawa Tengah. Hasil penelitian menunjukkan bahwa karakteristik cerobong boiler industri di Propinsi Jawa Tengah 66,67% telah memenuhi persyaratan dasar pengambilan contoh udara emisi sebagai salah satu prasyarat pentaaatan lingkungan; 20% industri sudah memiliki lubang sampling tanpa adanya platform atau kelengkapan tambahan; 6,67% sudah lengkap dengan fasilitas tambahan dan hanya 6,67% dari populasi sampel yang belum mempunyai persyaratan dasar pengambilan contoh

Faktor-Faktor yang Berhubungan dengan Kelelahan Kerja pada Pekerja Konveksi Bagian Penjahitan di CV. Aneka Garment Gunungpati Semarang

Fatigue can be influenced by several factors that can come from within the individual as well as of the work environment. CV. Aneka Garment Gunungpati Semarang is informal industry convection with all the sewing workers are women. The purpose of this research is to analyze the related factors of fatigue on sewing workers at CV. Aneka Garment Gunungpati Semarang. This research is explanatory research using cross sectional study design, where population numbers to the workers is 31 people. Sampling method using total sampling. Data analysis using Chi-Square test for normal distribution of data and Rank-Spearman for data not normally distributed. The results showed that most of respondents heavy work fatigue (71%), most of the old ³40 years (71%), the majority of respondents work >10 years (71%), nutritional status of most respondents in the normal category (50.1%), the posture of most respondents work at level 3 (42.1%), and most of the workload between 30 to <60% (42.1%), it means need repairation for workload. Results of statistical tests showed had relationship between age and fatigue (p = 0.0001), there is a relationship between the during work with fatigue (p = 0.0001), there is no relationship between nutritional status with fatigue (p = 0.191), there is a relationship between working posture with fatigue (p = 0.0001), and there is a relationship between the workload with fatigue (p = 0.0001). Business owners should provide additional lighting in accordance with the type of work (lighting meets 1000 Lux) and doing engineering work station (chair) to fit the body size of worker

Venturi-packed Scrubber Sebagai Pengendali Cemaran Partikulat Pada Industri Pengecoran Logam Tungku Induksi

Industri pengecoran logam tungku induksi skala kecil menengah memerlukan perhatian khusus mengingat sampai saat ini belum ada penanganan cemaran partikulat pada kegiatan produksinya. Kegiatan penelitian ini berupa rancang bangun peralatan venturi packed scrubber beserta fasilitas pendukung yaitu: bangunan penangkap partikel, pengendap air dan cerobong. Lokasi penelitian dilaksanakan di bengkel pengecoran milik Balai Besar Logam dan Mesin (BBLM) Bandung untuk melihat efektifitas penurunan parameter partikulat inhalabel dan partikulat respirabel selama proses pengecoran berlangsung. Hasil ujicoba alat menunjukkan penurunan partikulat inhalabel sebesar 0,5745 mg/Nm3 dan partikulat respirabel sebesar 0,2357 mg/Nm3. Efisiensi pengikatan venturi packed scrubber untuk partikulat inhalabel sebesar 57,26% dan partikulat respirabel sebesar 61,73%

Rancang Bangun Aplikasi Pencatatan Produksi pada PT.Mega Utama Indah

PT. Mega Utama Indah is a company engaged in the trading and processing of raw wood into finished wood. The main obstacle faced by PT. Mega Utama Indah now is recording the production process are still done manually such as recording the use of raw materials and auxiliary materials, the use of human labor, the use of the machine, and the use of other costs. All recording is still done by recording into a book.These constraints resulted in companies experiencing difficulties in terms of search data, perform scheduling of engine maintenance, and the difficulty in obtaining information and reports required by the leadership in making decisions for the company, the required application records of production which includes data recording of raw materials, auxiliary materials , human labor, machinery, and other costs.Based on research that has been done, the application can generate reports, such reports raw material USAge per order or per month, reports the use of adjuvant per order or per month, reports the use of labor per order or per month, reports the use of machines per order or per month, and report USAge fee per order or per month that the company needs to search the data, perform machine maintenance scheduling, and obtain the required information by the leadership in making decisions for the company

Perancangan Mortar Geopolimer Abu Sekam

This study present about geopolymer mortar with rice husk ash (RHA) as binder. Both material are used their silica element were activated by alkaline solution. Alkaline solution was prepared by combining sodium silicate and sodium hydroxide of 18 M. Compressive strength of geopolymer mortar that was studied based variation of modulus activator, dosage activator, curing time, and curing temperature. Research showed that optimum mix proportion of geopolymer mortar with Rice Husk Ash (RHA) which result the optimum compressive strength. The ratio of sodium silicate solution to sodium hydroxide solution by mass was 2.5:1. The mass ratio of alkaline solution to blended ashes was 9:10. Test specimens 5×5×5 cm cube were prepared and cured at room temperature (28ºC) for 3 days and heat-cured at 70ºC for 24 hours. The speciemens were cured at room temperature for 7 days until testing date. Result from this research represents compressive strength the mortar as according to variation molar of sodium hydroxide and used a little addition of water