PENGARUH PENGGUNAAN STRATEGI THE LEARNING CELL TERHADAP PEMAHAMAN KONSEP GLOBALISASI PADA SISWA KELAS IV SD SE-GUGUS DIPONEGORO, COLOMADU, KARANGANYAR TAHUN 2013

Wiwin Retno Damayanti. PENGARUH PENGGUNAAN STRATEGI THE LEARNING CELL TERHADAP PEMAHAMAN KONSEP GLOBALISASI PADA SISWA KELAS IV SD SE-GUGUS DIPONEGORO, COLOMADU, KARANGANYAR TAHUN 2013. Skripsi, Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta. Juli 2013. Penelitian ini bertujuan untuk mengetahui strategi belajar yang lebih efektif antara strategi the learning cell dan strategi mengulang terhadap pemahaman konsep globalisasi pada siswa kelas IV SD se-Gugus Diponegoro, Colomadu, Karanganyar. Penelitian ini menggunakan metode eksperimental semu (Quasi experimental research). Rancangan penelitian yaitu Nonequivalent Control Group Design. Populasi yang digunakan adalah seluruh siswa kelas IV SD di wilayah Gugus Diponegoro Kecamatan Colomadu Kabupaten Karanganyar. Sampel pada penelitian ini berjumlah 87 siswa, 26 siswa sebagai kelompok uji coba instrumen, 24 siswa sebagai kelompok eksperimen yang diajar dengan strategi belajar The Learning Cell dan 37 siswa sebagai kelompok kontrol yang diajar dengan strategi mengulang. Teknik pengambilan sampel dilakukan secara Cluster Random Sampling. Data dikumpulkan dengan metode tes dan dokumentasi. Dokumentasi digunakan untuk mengetahui kemampuan awal siswa. Tes digunakan untuk menilai pemahaman konsep globalisasi siswa. Tes yang digunakan adalah tes pemahaman konsep. Uji normalitas menggunakan metode Lilliefors, uji homogenitas menggunakan metode Bartlett, uji keseimbangan dan uji hipotesis dengan uji t. Berdasarkan analisis data hasil penelitian diperoleh sko

PENGARUH VOLUME TERHADAP DAYA SERAP SISTEM FAAS BERBAHAN ARANG TEMPURUNG KELAPA DALAM PENENTUAN AMBANG BATAS PROSES PENYARINGAN LIMBAH CAIR LAUNDRY

Penelitian ini bertujuan untuk mengetahui pengaruh volume limbah cair laundry terhadap partikel padat terlarut, tingkat keasaman, nilai tegangan permukaan, kandungan fosfat dan kandungan deterjen dalam proses penyaringan menggunakan sistem FAAS. Penelitian ini menggunakan sistem penjernih air FAAS (Filtrasi, Absorbsi, Adsorpsi dan Sedimentasi). Sistem ini menggunakan 4 kolom pipa dan air dialirkan melalui pipa paralon. Filtrasi dan absorsbsi terjadi pada semua pipa, adsorpsi terjadi pada karbon aktif dan sedimentasi terjadi saat air mengalir ke atas. Absorben yang digunakan dalam penelitian ini adalah karbon aktif tempurung kelapa, kerikil aktif kali Krasak, dan pasir aktif silika.Hasil proses sistem FAAS diukur menggunakan TDS meter untuk mengetahui partikel padat terlarut, pH meter untuk mengetahui tingkat keasamannya, tensiometer du Nouy untuk mengukur nilai tegangan permukaan dan spektroskopi UV-Vis untuk mengukur kandungan fosfat dan kandungan deterjen. Hasil penelitian menunjukkan bahwa dengan meningkatnya volume limbah cair laundry yang melalui sistem FAAS maka jumlah partikel padat terlarut mencapai 247 ppm. Sedangkan tingkat keasaman menjadi 7,0. Pada tegangan permukaan mencapai 45,77 mN/m. Untuk kandungan fosfat dan kandungan deterjen berkurang menjadi 1,174 mg/l dan 2,415 mg/l. Lima parameter pengukuran tersebut sudah berada di bawah ambang batas yang ditentukan. Volume penyaringan paling baik berada pada 40 liter

CARBON DIOXIDE EMISSION FACTOR ESTIMATION FROM INDONESIAN COAL

Climate change will become the priority for the air quality management. It focuses more on carbon dioxide emission. Indonesia which has power generation dominated by coal combustion is expected to develop the national CO2 emission factor. Due to the high variation in Indonesia coal rank and its growing magnitude in CO2 emission caused by the future coal-fired power plant development, the characteristic emission value becomes an important concern. The method used in this study is developed from the IPCC Guidelines for Energy. The conversion unit plays an important role in the calculation method. The result shows that the higher in C content, the lower in its CO2 emission factor. It means that coal classified as high C content or high heating value will produce low carbon dioxide emission factor. The average CO2 emission factor obtained in Indonesian coal is 99,718 kg CO2/TJ with an average value of carbon content 27.2 kg C/GJ, and NCV equal to 19.8 TJ/Gg. Coal rank is categorized as lignite to subbituminous or bituminous

PREDICTION OF MINE DRAINAGE QUALITY BY KINETIC TESTS

Kinetic test is one of the methods to predict acid mine drainage. The test shows the acceleration of natural oxidation rate over those observed in the field. This may have the advantage of condensing time, and providing earlier insight into the potential for acid generation. Generally, kinetic test evalu- ates the changes in pH, sulfate, acidity and host of potential metals. However, the test also has high degree uncertainty. To minimize the uncertainty it needs to calibrate and validate the model of kinetic test by comparing prediction model with actual field sampling results. As field data availability for validation is limited, it is strongly suggested that researcher should make a continuous research from the prediction and the actual sampling using many methods

EFFECT OF REAGENT VOLUME AND CONCENTRATION ON RECOVERIES OF MgO AND SO3 WITHIN SYNTHETIC DOLOMITE-BASED KIESERITE

Natural kieserite is usually used for the production of epsom salt and fertilizer. Normally, the mineral is mined from geologic marine deposits and provides a soluble source of both Mg and S for plant nutrition. However, natural kieserite cannot be found in Indonesia. The fact that this country retains a lot of dolomite deposits and such a material can be processed into synthetic kieserite by sulphatization process seems promising for fertilizer industry in Indonesia. Varying the sulfuric acid concentration between 2 and 5 N and its volume from29.50 to 94.80 ml produces the MgO in MgSO4 filtrate below the specification as stated in Indonesian National Standard (14 – 19%) though its sulfur content has satisfied the requirements. It is assumed that some MgO’s (around 1.93 – 7.12%) are still available in CaSO4 deposit. To get the optimum results, an appropriate calcula- tion is required when adding sulfuric acid to the process and the solution should be in neutral condition prior to separating MgSO4 – CaSO4 as well

PENGARUH PENGGUNAAN STRATEGI THE LEARNING CELL TERHADAP PEMAHAMAN KONSEP GLOBALISASI

Abstract: The purpose of this research is to find out the more effective learning between the learning cell strategies and rehearsal strategies in understanding the concept of globalization at a 4th grade students of elementary school on Diponegoro Region, Colomadu District. This research was used Quasi Experimental method. The research design used Nonequivalent Control Group Design. The sampling technique was Cluster Random Sampling. Test was the technique which used to measure the student’s understanding of the concept. The normality test used Lilliefors method, the homogeneity test used Bartlett method, balance test and hypothesis test used t-test. The research’s result showed that The Learning Cell Strategies was more effective than rehearsal strategies in understanding the concept of globalization at a 4th grade students of elementary school on Diponegoro Region, Colomadu District. Abstrak: Penelitian ini bertujuan untuk mengetahui strategi belajar yang lebih efektif antara strategi the learning cell dengan strategi mengulang terhadap pemahaman konsep globalisasi pada siswa kelas IV SD se–gugus Diponegoro Kecamatan Colomadu. Penelitian ini menggunakan metode eksperimental semu (Quasi Experimental Research). Rancangan penelitian yaitu Nonequivalent Control Group Design. Teknik pengambilan sampel dilakukan secara Cluster Random Sampling. Tes digunakan untuk menilai pemahaman konsep siswa. Uji normalitas menggunakan metode Lilliefors, uji homogenitas menggunakan metode Bartlett, uji keseimbangan dan uji hipotesis dilakukan dengan uji t. Hasilnya menunjukkan bahwa strategi the learning cell lebih efektif dibandingkan strategi mengulang (rehearsal strategies) pada pemahaman konsep globalisasi pada siswa kelas IV SD se–gugus Diponegoro Kecamatan Colomadu. Kata Kunci: Pemahaman Konsep, The Learning Cell, PK

Perbaikan Proses Bisnis Pasang Baru Telepon Kabel di Wilayah Pemasangan Baru Surakarta dengan Metode Fault Tree Analysis

TELKOM always make an effort to fulfill the society need upon products and services of fixed phone. the effort of TELKOM such as repair the old network (existing) and add the new network in certain area that have high potency of demand, such as in Gentan, Purbayan, Colomadu, Jaten, and Kaliyoso. Those reparation and increament of the network give chances to customer of TELKOM who want to have a new installation of fixed phone (PSB). Process of PSB fixed phone in existing area is different new network area. In new network area, TELKOM not yet had standard business process, and this is stimulate some problems, such as delaying activation, untidy network, lack of access network and escalation (fatal cancel). Evaluation and improvement of business process are conducted using the method of Fault Tree Analysis (FTA) and Malcolm Baldridge National Quality Award (MBNQA). Based on the result of FTA and MBNQA, there is improvement on business process new installation (PSB) of fixed phone in new network area by adding Drop Wire withdrawal in early stage

OVERBURDEN TREATMENT TECHNOLOGY IN ACID MINE DRAINAGE PREVENTION

The prevention and control of acid drainage is a major issue for mine operators at sites where sulfide minerals occur. On going risk assessment of acid drainage potential and sulfidic waste management during planning, development, operation and closure of mining developments will result in substantial environmental and economic benefits. Overburden treatment technology must be identified and imple- mented in order to minimize the production of acid mine drainage (AMD). There are many treatment technologies for AMD prevention at surface mining such as alkaline addition and special handling. Overburden analysis (OBA) refers to determination of the acidity or alkalinity producing potential. The addition of alkaline material to surface mine backfill can be an effective method of compensating for overburden and reduce the potential for acid mine drainage. Special handling methods fall into four categories: blending, encapsulation, submergence and alkaline redistribution. Special handling is most effective in conjunction with other best management practices such as alkaline addition. Moni- toring during and after mining is necessary to evaluate special handling techniques

ENVIRONMENTAL IMPACT OF ARTISANAL GOLD MINING AT CIKANGEAN RIVER IN MULYAJAYA VILLAGE, GARUT, WEST JAVA

The artisanal and small scale gold mining usually utilize mercury for its gold recovery. Mercury is used as the best alternative by many miners due to its effectiveness, simple and cheap process for gold recovery. The increasing mercury utilization motivates tekMIRA to prevent more pollution caused by uncontrolled or incorrect mercury utilization. For this purpose, the artisanal gold mining located in Mulyajaya Village, Garut was chosen for monitoring mining activities. Grab sampling method was used to evaluate environmental monitoring on terrestrial water and its sediment, soil and tailing surrounding the artisanal gold mining. The monitoring results show that mercury was found in all waters and sediment surrounding the artisanal gold mine. The mercury concentration in river sediment was around 0.08 – 0.15 ppm and this was higher than its concentration in the river water (0.0002 ppm). The same concentration occurred at the upstream and downstream (0.0002 ppm). The mercury concentration in the sediment coming from sedimentation pond were 2.27 – 7.60 ppm. Eventhough the mercury was still in low concentration either in the water or in the sediment, a guidance should be delivered to the miners about the danger of mercury substances used in the mining activities