Browsing by Author "Syech, Riad"
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Item ANALISA AIR BAWAH TANAH DI DESA RIMBO PANJANG DENGAN MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DAN HIDROGEOKIMIA(2020-07) Fitri, Gita Novita; Syech, RiadResearch on the analysis of underground water in Rimbo Panjang Village using Sclumberger Geoelectric and Hydrogeochemical methods. Geoelectric is a method used to determine the nature of electric currents in the earth by detecting on the surface of the earth. Identification of the aquifer layer was carried out on 2 lines with a length of 100 meters. Based on the results of the analysis using progress software, the first path produces a resistivity value of 101.78 Ωm - 837.45 Ωm and the second path 118.02 Ωm - 863.84 Ωm. Groundwater samples at the study site were tested for pH, TDS and coli bacteria. The results showed that all water samples has acidic levels with an average pH of 5.5 so that rust often occurred on water pipes and caused smel water, whereas TDS results was not exceed the quality standard and coli bacteria exceeded the quality standard so the water was not suitable for consumption.Item ANALISA BESAR PERPINDAHAN KALOR PADA SISTEM PEMBANGKIT LISTRIK TENAGA UAP INDUSTRI BIODIESEL PT. CILIANDRA PERKASA, DUMAI(2016-02-01) Oktimalia, Anggita; Ginting, Maksi; Syech, RiadThe “Major analysis of heat transfer has been investigated at Steam Power of Biodiesel industry PT. Ciliandra Perkasa, Dumai” by using a field survey. The survey is conducted by observing the flow rate, pressure and temperature in the steam power plant systems. The observations calculate the enthalpy, heat required to convert water into steam and steam values that go into effect on the power turbine electrical output. Calculation results obtained turned out great enthalpy economizer entering the greatest value is 2959.1 kJ/kg and the smallest one is 2950.2 kJ/kg, while the incoming enthalpy at most major turbine is 3350.8 kJ/kg and the smallest one is 3235.6 kJ/kg. The highest enthalpy output at cattle is 3344.3 kJ/kg and the smallest one is 3216.5 kJ/kg, while the highest enthalpy output in turbine is 3286.6 kJ/kg and the smallest one is 3214.4 Kj/kg. The largest heat required to convert the water into steam is the 12816.9 MJ/h, while the smallest one is 7401.7 MJ/h. A greatest value that goes to the turbine steam is 0.00867 kg/kWh, while the smallest one is 0.00832 kg/kWh and the greatest power is 2.009 MW, while the smallest one is 1.766 MWItem ANALISA KARAKTERISTIK SPEKTRUM SUARA ANAK PAUD MENGGUNAKAN SOFTWARE PRAAT(2016-02-01) Hartanti, Juli; Erwin; Syech, RiadA study of spectrum of children voice (4-5 year old) using praat software through computer has been done. The voice of sample was recorded by using a mocrophone connected to computer equipped printed praat software.The samples are girls and boys that originected from Pendidikan Anak Usia Dini (PAUD) Kids Center Al-Fatyah, Bina Karya Abadi and Kid’s home. The results show that the value of pitch for girls are higher than that of boys. This is due to the size of their voice band. The value of pitch are 220-290 Hz and 219-287 Hz for boys and girls respectively. The average value of formant are increased formant F1 to F3. While the value of F2 is higher for boys compared to girls. The duration for boys is longer than for girls. The time duration of girls and boys is respectively 3.0-4.0 s and 2.0-2.9 s.Item ANALISA KETINGGIAN AWANUNTUK MENENTUKAN PREDIKSI CURAH HUJAN DI WILAYAH KOTOTABANG SUMATERA BARAT(2016-02-04) Simarmata, Irsanti Roseni; Syech, Riad; Harjupa, WendyA research has been done in cloud to analyzer the relationship between rainfall and the haight of cloud in region of Kototabang West Sumatera. In this current use research, the Lidar and ORG were utilized as a source of light and measurent tools. Results of the research showed that the minimum value of MAE use 2,335 due to-day-8. That is rainfall of 0,96 mm/day. The minimum rainfall use occured on 9th April, whiel use 0 mm/day, whiel means no rain happend: clouds that use formed did not count rain. This fenomenon use count by formed cloud use affected by heat advection resulting that cloud re-warmed and did not couse the rain. The maximum rainfall recured on 5th April,use about 23,12 mm/day. This value represented the high evaporation happend at that time in Kototabang. The percentage of rainfall that occurred at high cloud, middle cloud and low cloud use 20,58 %, 41,18 % and 27,94 % effectively.Item ANALISA SEBARAN AWAN UNTUK MENENTUKAN PREDIKSI CURAH HUJAN DI KOTA PEKANBARU BERDASARKAN DATA PENGINDERAAN JARAK JAUH(2013-03-05) Hakim, Mona Gustina; Syech, Riad; Ardhitama, AristyaA research on the analysis of cloud distribution was performed to predict the rainfall in Pekanbaru based on remote-sensing data. The data sources of the research was collected using a satellite and radar. The data was calculated using MAE, MAPE and RMSE. The research was conducted for fifteen days with three time divisions; at 00Z, 06Z and 12Z. The research using satellite shows that values of MAE, MAPE and RMSE at 00Z were resepectively 30.2, 44.74%, 116.964; at 06Z, that values were 11.486, 138.39%, 44.487; and at 12Z, the values were 30.406, 60.09%, 117.764, . With radar, the values of MAE, MAPE and RMSE at 00Z were respectively 36.166, 53.58%, 140.0728,; at 06Z were 40.28, 485.3%, 156.003; and at 12Z, the values of MAE, MAPE and RMSE were respectively 37.12, 73.21%, 143.765. The graphs of data show that satellite interpretation was better than radar interpretation. The relationship between the cloud peak temperature and the rainfall was very clearly seen. The lower the cloud peak temperature was, the lower the rainfall would be. Such a condition could not be seen at radar intepreation due to some hindering factors such as distance, celluler towers affecting the signal transmissionItem Analisa Siklis Voltametri Superkapasitor Menggunakan Elektroda Karbon Aktif Dari Kayu Karet Berdasarkan Variasi Aktivator Koh(2015-12-28) Taer, Erman; Zulkifli; Sugianto; Syech, Riad; Taslim, RTelah berhasil dianalisa elektroda karbon superkapasitor dari kayu karet menggunakan metode siklis voltametri. Pembuatan sampel tahap awal melalui proses pemotongan, pengeringan, karbonisasi dan pemolesan membentuk pelet. Variasi aktivator KOH dan HNO3 digunakan untuk meningkatkan luas permukaan elektroda. Variasi KOH yang digunakan adalah 1 M, 3 M, 5 M sedangkan larutan HNO3 yang digunakan adalah sebesar 25%. Metode pengukuran siklik voltametri dilakukan menggunakan alat Solatron 1280 dengan jendela potensial dari 0 sd 1 Volt pada variasi laju imbasan 1 mV/s, 5 mVs, 10 mV/s, 30 mV/s, 50 mV/s dan 100 mV/s. Dari hasil penelitian yang telah dilakukan didapatkan nilai kapasitansi spesifik tertinggi terjadi pada laju imbasan 1 mV/s untuk semua variasi KOH. Nilai kapasitansi spesifik tertinggi pada laju imbasan 1 mV/s pada variasi KOH 1 M, 3 M, 5 M adalah sebesar 16,36 F/gram, 68,27 F/gram dan 63,24 F/gram. Pengujian tambahan juga dilakukan menggunakan alat difraksi sinar-X dan mikrosop pemindai elektronItem ANALISIS SISTEM PENGERING OPAK SINGKONG TIPE RUANG KABINET DENGAN MENGGUNAKAN BIOMASSA LIMBAH PELEPAH PINANG DAN PELEPAH KELAPA(2016-10-12) Warti, Asmi; Juandi M, Juandi; Syech, RiadThe analysis of cassava opaque using cabinet space of dryer system has been done. The drying chamber was designed with the diameter of 130 cm long, 97 cm width and 120 cm height. This drying chamber was consisted of a drum with height of 70 cm, and diameter of 44 cm. The sample used was cassava opaque that originated from Rejosari Urban Village, Tenayan Raya and Pekanbaru City. Maximum temperature of the drying chamber was 65°C and 69°C for areca midrib and coconut midrib respectively. This was caused biomass energy which generated by coconut midrib waste greater than that produced by areca midrib waste. The average water content of cassava opaque obtained in this research using biomass waste of areca midrib was 15.98%, 12.97%, 11.56%, 9.38%, 7.21% and 6.07%, while the average water content for cassava opaque using biomass waste of coconut midrib was 24.29%, 12.21%, 11.16%, 8.43%, 6.48% and 5.20%. Efficiency of the drying time using biomass waste of areca midrib was 96.01% while the efficiency of the drying time using biomass waste of coconut midrib was 97.13%.Item Desain dan Pembuatan Perangkat Lunak Metode Estimasi Impedansi Akustik (IA) Menggunakan Metode Geostatistik Simulasi Gaussian Sequensial (SGS)(2012-10-24) Edisar, Muhammad; Syech, RiadAplikasi metode estimasi pada inversi seismik yang digunakan dalam studi eksplorasi hidrokarbon sejauh ini masih menggunakan konsep estimasi konvensional, seperti metode inverse distance, nearest-neighbour dan triangulation. Beberapa metode tersebut hanya mempertimbangkan parameter jarak tanpa memperhatikan faktor sebaran, korelasi antar data serta statistical nature dari data. Estimasi menggunakan metode Geostatistik merupakan suatu metode inversi yang mempertimbangkan parameter-parameter statistik dari data observasi, seperti sebaran, korelasi antar data, serta probabilitasnya secara statistik. Pada Inversi Geostatistik, forward modelling dapat dilakukan dengan menggunakan metode Sequential Gaussian Simulation (SGS). Dengan SGS, simulasi pemodelan dilakukan dengan memperhatikan parameter-parameter statistik dari data observasi. Pada penelitian ini, SGS dilakukan dengan menggunakan metode estimasi geostatistik simple kriging dan ordinary kriging.Item EFEK PARTISI TERHADAP UPAYA PENGENDALIAN KEBISINGAN(2013-07-23) Karbi, Jusma; Defrianto; Syech, RiadA research has been done on the effects of partition in order to control noise using a method of field survey. The results of this research suggested different results between the results of measurements with partition and without partition. Partitions used in this research were three types of plants, ie Gandarusa (Justicia gendarussa), Bamboo (Bambusa multiplex) and Tea (Acalypha siamensis), with different size (length, height and width). A Sound Level Meter (SLM) SL-4112 was used to measure sound intensity level. Measurement, were carried out in two stages, (1) measurement of sound intensity level without partitions, (2) measurement of sound intensity level with partitions. The results showed that at observation point 1, the mean of sound intensity level were 77.73 dB and 79.29 dB for with and without partition respectively. Where as at point 2, the mean of sound intensity level without partition respectively were 93.68 dB and the partition 86.54 dB, and at point 3, the mean of sound intensity level were 74.89 dB, and 70.70 dB respectively for without and with partition. Sound intensity tends to get smaller with increasing geometry size of the partition. The bigger the partition, the greater the value of TL (transmission loss) is. That is because of the amount of the intensity of sound lost due to absorption increase with increasing the thickness (size) of the partition.Item IDENTIFIKASI LITOLOGI PENYUSUN BAWAH PERMUKAAN BUMI DI KECAMATAN BUKIT RAYA MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI WENNER(2020-10) Febriani, Eka; Syech, RiadGroundwater research and lithology analysis have been done using the Wenner configuration geoelectric method in Bukit Raya Subdistrict, precisely in Simpang Tiga and Tengkerang Utara Villages. This study aims to identify the lithology of the subsurface constituents of the earth based on the rock resistivity value in the study area. The number of tracks is two points with a track length of 100 meters. Data processing using Microsoft Excel and Res2Dinv software. In the trajectories 1, the resistivity value ranges from (49.6-672) ohm-m. The lithology of trajectories 1 consists of clay, sand, gravel, lumps of scale and sandstone. In the trajectories 2 the resistivity value ranges from (41.8-3896) ohm-m. The lithology of trajectories 2 consist of clay, sandy loam, sand, gravel, bedrock containing dry soil, as well as lumps of scale and sandstone.Item INTERPRETASI KEDALAMAN AKUIFER UNTUK MENENTUKAN POTENSI AIR TANAH MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DI DAERAH TANGKERANG UTARA PEKANBARU(2020-10) Setiyo, Yori Eko; Syech, RiadResearch has been carried out: Interpretation of Aquifer Depth to Determine Groundwater Potential Using the Geoelectric Method of Schlumberger Configuration in Tangkerang Utara Pekanbaru. This research is background by the potential for surface water which is decreasing due to increased population growth and agriculture in (2014–2019) in Tangkerang Utara Village. This study purpose to interpret the underground lithology layer, the depth and thickness of the aquifer as well as the potential of aquifer water by analyzing its resistivity value. The research was conducted at Imam Munandar Street Gang Pribadi RT.04 RW.13 Tangkerang Utara Village, Bukit Raya District, Pekanbaru City, Riau Province. The research used the Schlumberger configuration geoelectric method. The number of tracks is two points with a stretch of 150 meters. The measurement result data is processed using Software Progress. Interpretation results on line 1 the resistivity value ranges (33.40–1046.76) ohm-meters and the resistivity value of line 2 ranges (53.81–2250.98) ohm-meters. Both tracks have sand, sandstone and aquifer lithology. Aquifers have been found in the third layer of line 1, namely at a depth (1.99–10,423) meters and a thickness of 8.43 meters. The potential for aquifer (groundwater) in Tangkerang Utara Village is 330.18 x 106 m3.Item INVESTIGASI AKUIFER DISEKITAR DAS (DAERAH ALIRAN SUNGAI) SIAK DI PEKANBARU MENGGUNAKAN METODE RESISTIVITAS KONFIGURASI WENNER DAN KONFIGURASI SCHLUMBERGER(2013-06-13) Fiizumi, Nurun; Syech, Riad; SugiantoA Research has been done to determine the aquifer and structure of lithology subsurface at Siak Bridge1, 2, and 3 Pekanbaru by using a geoelectric method in Wenner and Schlumberger electrode configurations. The current and voltage were obtained by using geoelectric equipment. These data were processed by excell to acquire the apparent resistivity. The software of Res2Dinv 3.56 and VES were used to analyze the data, which yield the real resistivity of rock and subsurface of lithology. The interpretations of Res2Dinv 3.56 and VES show that the lithology of Siak Bridge 1, 2, and 3 Pekanbaru consists of clay, sand, sand gravel, and hard core such as granite and limestone. The compressed aquifer was identified in Siak Bridge 1 and 3 where as Siak Bridge 2 was identified as free aquifer. The depth of aqiufer obtained by using Res2Dinv and VES differs each other in only 4 meters.Item KONSENTRASI KANDUNGAN LOGAM BERAT TERHADAP KUALITAS AIR SUNGAI SINGINGI DI DAERAH DESA KOTO BARU KECAMATAN SINGINGI HILIR KABUPATEN KUANTAN SINGINGI(2016-02-01) Mulyani, Sry; Syech, Riad; Tambunan, WalfredA concentration of heavy metals (Pb, Cd, Zn), an electrical conductivity and water density at Sungai Singingi by using an experimental method have been carried out. Water sampling at Sungai Singingi that crosses the village of Koto Baru is conducted three times at five points where the distance between the point is 10 m as long as 40 m. The equipment used are the concentration of heavy metals by using Atomic Absorption Spectrophotometer (AAS), the electrical conductivity by using a Total Dissolved Solid Meter (TDS meter), and the density of the water by using a Hydrometer. The results shows that the concentrations of heavy metals lead (Pb) are highest in five points, namely 0.0889 mg/l and the lowest one is of -0.0296 mg/l. The highest the concentration of heavy metal cadmium (Cd) in the five points is 0.0028 mg/l and the lowest one of -0.0004 mg/l. The highest concentration of zinc (Zn) is 0.0228 mg/l and the lowest one is 0.0020 mg/l. The highest electrical conductivity of water in the five point is 31.8 μmho/cm and the lowest one is 28.3 μmho/cm. The highest water density in five point is 1095.9 kg/m3 and the lowest one is 1031 kg/m3.Item KONSENTRASI PARTICULATE MATTER DAN FAKTOR YANG MEMPENGARUHI KEADAAN UDARA DI KOTA MADYA PEKANBARU MENGGUNAKAN AMBIENT DUST ANALYZER(2013-07-13) Assabraini; Sugianto; Syech, RiadResearch on the effects of solar intensity, temperature and air humidity to the particulate matter concentration (PM10) has been done by using data interpretation method. Measurements of PM10 concentration were performed by using an ambient dust analyzer FH62-1 series at three monitoring stations in Pekanbaru, namely Kulim Station, Sukajadi Station and Tampan Station. The observed data is daily data from 2011 to 2012, which were processed and analyzed to be monthly average data. Results of data analysis showed that the average PM10 concentration in 2011 was 44.10±17.56 μg/m3, the maximum PM10 concentration were 71.33 μg/m3 in November 2011, while the minimum PM10 concentration occurred in August 2011 at 16.68 μg/m3. The average PM10 concentration in 2012 was 32.54±16.55 μg/m3, with the maximum value reached in November 2012 at 60.50 μg/m3, and the minimum value was 14.32 μg/m3 which occurred in June 2012. PM10 concentration is low when the sunlight intensity and air temperature reach the maximum value, while the value of air humidity is the lowest. PM10 concentration is high when the sunlight intensity and air temperature are low, while air humidity has high value. The trend of PM10 concentrations in atmosphere Pekanbaru 2011 and 2012 is decreased, both for maximum and minimum values. PM10 concentrations were categorized as medium, according to the standard index of air pollution, which is issued by Indonesian Ministry of Environment.Item Laporan Hasil Perbaikan Proses Pembelajaran Perbaikan Proses Pembelajaran Matakuliah Teori Pengukuran(2015-04-07) Syech, Riad; Surbakti, AnthoniusTelah dilakukan kegiatan penelitian terhadap perbaikan pembelajaran Mata Kiiliah Teori Pengukuran. Kegiatan ini dilakukan terhadap mahasiswa jurusan Fisika FMIPA UNRI yang yang mengambil mata kuliah Teori Pengukuran semester ganjil Tahun Ajaran 1999/2000 yang berjimilah 1 orang, dilaksanakan pada bulan September - Desember 1999. Sebagai pembanding adalah mahasiswa yang telah mengambil mata kuUah Teori Pengukuran semester ganjil Tahun Ajaran 1998/1999. Evaluasi terhadap kegiatan perkuliahan tersebut berdasarkan komponen yaitu : pekerjaan rumah yang diberikan setiap selesai bab pembahasan, quis yang diberikan setiap minggu, ujian pertengalian semester dan ujian semester. Evaluasi akhir menggunakan ketentuan : PR = 10 % , Quiz = 15 % , Mid Semester = 25 9b dan Ujian Semester = 50 %, serta kriteria penilaian yang digunakan adalah : x > 80 = A, 70 < .X < 80 = B, 55 < -x < 70 = C, 40 > X < 55 = D dan x < 40 = E. Hasil akhir nilai rata-rata mahasiswa Teori Pengukuran Tahun Ajaran 1999'2000 adalah 75. Berdasarkan pengelompokan nilai menurut sistem huruf,- diperoleh parsentase yaitu : Nilai B = 100 % dan nilai A, nilai C, nilai D dan nilai E = 0 % (tidak ada). Sebagai pembanding dari hasil kegiatan perbaikan mengajar ini, diambil nilai mahasiswa yang telah mengikuti mata kuliah Teori Pengukoiran semester ganjil Tahim Ajaran 1998T999. Parsentase perolehan nilai mahasiswa tersebut dengan kriteria penilaian yang sama dengan nilai mata kuliah Teori Pengukuran semester ganjil Tahun Ajaran 19992000 diperoleh nilai A - 22 % (2 orang), nilai B = 22 % (2 orang), nilai C = 56 % (5 orang) dan nilai D serta nilai E = 0 °-o (tidak ada), dengan nilai rata-rata mahasiswa 68,89 ± 9,88. Jika dibanding tingkat keberhasilan penguasaan materi perkuliahan antara kedua kelompok mahasiswa tersebut jika diuji secara statistik berdasarkan perbandingan nilai rata-rata dan standar deviasi ( uji-t tidak dapat dilakukan karena populasi sama dengan sampel ) dan dari prasentase perolehan nilai, terdapat perbedaan yang cukup berarti. kaiena yang mengambil mata kuliah Teori Pengukuran ini hanya satu orang dan tingkat keberhasilan penguasaan materi tidak dapat dibandingkanItem MENENTUKAN AKUIFER LAPISAN AIR TANAH DENGAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DI PERUMAHAN GRIYO PUSPITO DAN BUMI TAMPAN LESTARI(2013-03-05) Parhusip, Mando; Syech, Riad; SugiantoA research to investigate ground water layer by Geoelistrical method in schlumberger configuration has been done at Regency of Griyo Puspito and Bumi Tampan Lestari, Tampan Districs, Pekanbaru. A resistivitimeter model – 2115A. Has been used to measure voltgsand currens of the layer. Results of measurement and calculation, it was found that there are 4 layers at from each of the research locations. The results obtained in Regency of Griyo Puspito are mentioned as follows, the resistivity and thickness of the first layer are 95.8 Ωm and 9 meters respectively, the second layer 147.8 Ωm in resisitivity and 22.9 meters thickness. This second layer is interpreted as sand clay are which contains brackish water. The resistivity and thickness of this third layer are in range of 294.1 Ωm to 298 Ωm and 36.4 to 62.4 meters. This third layer contains sandstone and aquifer. The fourth layer has resistivity less than 5000 Ωm , which is enough impermeable of water. Mean while the results of Regency of Bumi Tampan Lestari are follows, the resistivity and thickness of the first layer are range 93.0 Ωm to 97.1 Ωm and 7.6 meters to 12.2 meters respectively, the second layer are in range of 100 Ωm to 132.4 Ωm and 21.1 meters to 34.6 meters this to second layer interpreted as sandclay , which contain brackish water . The third layer has resistivity in range of 176.3 Ωm to 261.1 Ωm and thickness in range of 14.2 meters to 50 meters, which contain sandstone and aquifer. The resisitivity of the fourth layer is 4941.1 Ωm to 4974.4 Ωm, this layer interpreted as clay enough impermeable for water which has no aquiferItem MENENTUKAN NILAI REFLEKTAN DAN SALINITAS DI PERAIRAN SELAT MALAKA MENGGUNAKAN DATA LIPUTAN CITRA SATELIT FY-1D(2014-03-27) Syech, Riad; Malik, UsmanPenelitian ini bertujuan untuk menentukan nilai refelektan dan salinitas menggunakan metodologi interpretasi data digital . Pengolahan citranya menggunakan program Ermapper versi 5.5 dan arc view. Data yang digunakan adalah citra satelit FY_ID di perairan Selat Malaka yang sudah terkorekasi secara geometrik dan radiometrik pada bulan Juli 2011 sampai bulan September 2011 . Hasil penelitian nilai reflektan dan salinitas yang tertinggi terjadi pada tanggal 11 Agustus 2011 yakni 0,45 % dan nilai reflektan dan salinitas terendah terjadi pada tangal 24 september 2011 yakni 0,07 %.Item MENENTUKAN STRUKTUR LITOLOGI BAWAH PERMUKAAN BUMI DI KELURAHAN SIMPANG BARU KECAMATAN TAMPAN PEKANBARU MENGGUNAKAN METODE GEOLISTRIK DENGAN KONFIGURASI ELEKTRODA WENNER(2013-04-24) Suherman, Neldi; Juandi; Syech, RiadResearch has been done to determine the structure of lithology subsurface at Simpang Baru Kecamatan Tampan Pekanbaru by using geoelectric method in Wenner electrode configuration. The research measurement of current and voltage obtained by using geoelectric equipment. Then, this data was processed by excell to acquire the apparent resistivity. Res2Dinv is used to get the real resistivity and, to describe the subsurface lithology. According to the research results, the lithology of rock for both South-to-North measurement in Setia Mulia housing and West-to-East measurement in Ataiya housing were acquired in 7 lithological types , there are sandy soil, dry gravel, sand stones, sand, Alluvium, gravel and argillaceous sandstone.Item PEMANFAATAN ENERGI SURYA UNTUK MEMANASKAN AIR MENGGUNAKAN KOLEKTOR PARABOLA MEMAKAI CERMIN SEBAGAI REFLEKTOR(2016-10-12) Razak, Nafisha Amelya; Ginting, Maksi; Syech, RiadResearch on utilization of solar energy for heating water using parabolic collectors equiped with mirror that used as reflectors have been done. Parabolic collectors were placed on direct sunlight with 500 grams, 750 grams and 1000 grams mass of water in the container during 15 days of observation. The observations were carried out at time interval of 30 minutes from 10.00 am until 15.00 pm. The results of research showed that for mass of 500 grams, 750 grams and 1000 grams produced the highest temperature with the values respectively of 91.2 °C, 90.6 °C and 95.4 °C with radiation intensity 572.8 W/m2, 589.7 W/m2, and 612,3 W/m2. The magnitude of solar radiation intensity affects the amount of heat received by water, heat received by container and combined heat of water and container.Item PENENTUAN KONSENTRASI LOGAM BERAT Pb, Cu, Zn DAN KONDUKTIVITAS LISTRIK LIMBAH CAIR INDUSTRI PABRIK KARET PEKANBARU(2014-03-26) Mardhatillah, Wirdati; Syech, Riad; Tambunan, WalfredA research has been done about the determination of heavy metal concentrations such as Pb, Cu, Zn and electrical conductivities of industrial liquid waste of some rubber factories in Pekanbaru. The method that used in this research was an experimental method while the samples of rubber factory waste in Pekanbaru were taken five times for each rubber factory. The waste samples then were measured their heavy metal concentration using an Atomic Absorbtion Spectophotometer (AAS) and their electrical conductivity was measured by an conductivitimeter. The result showed that the concentration of Pb from both samples was not detected, this indicates that the concentration of Pb was very small. The average concentration of Zn in the liquid waste of PT. Bangkinang was 7,436 x10-6 kg/L which was higher than the of Zn concentration in liquid waste of PT. RICRY which was 3,59 x10-6 kg/L. The aveage concentration of Cu in liquid waste of PT. Bangkinang was 1,49 x10-6 kg/L that was higher than the Cu concentration in liquid waste of PT. RICRY which was 1,436 x10-6 kg/L. The average of electrical conductivity in liquid waste of a rubber factory, PT. Bangkinang was 319,74 x10-4 mho/m which was higher than of of liquid waste of PT. RICRY which was only 197,92 x10-4 mho/m