Physical inactivity and its predictors among adolescents in Saudi Arabia: A cross-sectional comparison between cities with and without a Healthy Cities Program.

OBJECTIVES: To estimate the prevalence of insufficient physical activity and excessive screen time among adolescents living in cities participating in the Healthy Cities Program (HCP) and cities not running the program in the Qassim region of Saudi Arabia. METHODS: We surveyed 1133 adolescents from the Qassim region using systematic random sampling between April and September 2017. Multivariable logistic regression analyses were conducted to investigate the predictors of insufficient levels of PA and excessive screen time. RESULTS: The prevalence of <60 minutes of moderate- to vigorous-intensity physical activity/day was 82.4% and <3 days of vigorous intensity physical activity/week among adolescents was 59%. There was no significant association between living in healthy cities (HCPs) and insufficient levels of physical activity. The odds of excessive screen time were higher in HCPs than in cities not running the program (NHCPs) (OR: 1.49). The odds of insufficient daily PA (OR: 2.19) are higher among girls than boys. Increasing age is positively associated with insufficient weekly PA (OR: 1.19). The prevalence of excessive recreational screen time is 84.6% with higher odds in HCPs than in NHCPs (OR: 1.51). CONCLUSION: Our findings report a lack of evidence of any impact of the HCP on adolescents' physical activity behaviors. This outcome warrants a further in-depth evaluation of the process and outcomes of the HCP in Saudi Arabia

Pengolahan Limbah Cair Industri Percetakan Uang Kertas (Utas) Menggunakan Proses Biologis Anaerob

A research of wastewater treatment technology come from money producing industry was conducted in laboratory scale using 10 lt of Anaerobic Fixed Bed Reactor. The money producing wastewater was treated by mixing with domestic wastewater with various compositions. The wastewater was fed into the bioreactor by draw and fill daily.The results show that the optimum of COD removal is 52,5%, optimum loading is 0, 95 g-COD/l/day and optimum flowrate is 0,5 l/day. The optimum compossition of money producing wastewater towards domestic wastewater is 30%. These optimum conditions can be used as a designed criteria for full scale of anaerobic bioreactor in the money producing industry. Katakunci : Wastewater, Anaerobic, Fixed Bed Reacto

Model Pembelajaran Berdasarkan Masalah untuk Meningkatkan Hasil Belajar IPA Sekolah Dasar (Studi Eksperimen Kuasi Siswa Kelas V SD Negeri 179 Pekanbaru)

One of factor that influence low students achievement that was students hard to understand in science subject. Students didn't understand the concept of the subject. That's why the author need to did the research by Problem Based Learning (PBL). This model be able to make student built their own knowledge, increase activity, increase the independent, systematic thinking, logic and accurate for acquire ability to solve the problem in a rational manner. The main purpose of this research was for identify increase student's achievement science between student who got Problem Based Learning (PBL) and student who got conventional learning. The research method used a quasi-experimental which divide 2 classes, experiment class and control class. This research was done in SDN 179 Pekanbaru between class Vb students as a control and class Vc students as a experiment. Data research was analyzed by Wilcoxon Signed Rank Test with degree of freedom α = 0,05. The result of analysis data, in experiment class got average pretest 42,2 became 50,2 in a average posttest. and in the control class got average pretest 39,1 became 46,13 for average posttest. The result of this research showed that there was different average from both of classes but based on statistic there was no significant difference toward increase students achievement science between students who got Problem Based Learning (PBL) and students who got conventional learning

Penerapan Strategi Pembelajaran Peningkatan Kemampuan Berpikir (Sppkb) untuk Meningkatkan Hasil Belajar IPA Siswa Kelas Ivb SD Negeri 183 Pekanbaru

The problem in this research is the low of Science learning outcomes. This is seen from the average student test scores were 64.45, where minimum completeness criteria applied 75. Because of these problems, an action research need to be conducted by applying Learning Strategies Enhancing Thinking Skills. The purpose of this research is to enhance the students\u27 Science Learning Outcomes in 4B Grade students of SD Negeri 183 Pekanbaru at Academic Year 2015/2016 with the number of 37 students. The research was conducted in two cycles, implemented in the second semester, the instrument consists of learning tools and data collection instruments. The data in this research is the observation sheet teacher activity, the student activity observation sheet, and the daily tests. Based on the analysis of the observation sheet activities of teachers and students saw an improvement that activity of teacher in the first cycle reaches 75.00%, second cycle reaches 91,66%, while in the student activity reached 70.83% for the first cycle and the second cycle reaches 91.66%. Analysis of the data showed improvement student learning outcomes that in the first cycle the average is 73.24 with 62.16% classical completeness, while in the second cycle the average is 87.29 with 86.48% classical completeness. This shows that the application of Learning Strategies Enhancing Thinking Skills can improve Science Learning Outcomes of IVB Grade Students SD Negeri 183 Pekanbaru

Penerapan Model Pembelajaran Inquiri Untuk Meningkatkan Hasil Belajar IPA Siswa Kelas III Sdn 013 Basilam Baru

. Penelitian Tindakan Kelas (PTK) ini bertujuan meningkatkan hasil belajar IPA siswa kelas III SDN 013 Basilam Baru melalui Model Pembelajaran Inkuiri dilakukan pada bulan Maret sampai dengan April. Subjek penelitian siswa kelas III SDN 013 Basilam Baru yang berjumlah 12 orang siswa. Parameter penelitian ini adalah hasil belajar siswa, aktivitas guru dan siswa. Hasil penelitian menunjukkan bahwa hasil belajar siswa mengalami peningkatan pada siklus I rata – rata 74,5 (sedang) dan siklus II rata – rata 81,2 (tinggi), ketuntasan belajar siswa dari siklus I 50 % (tidak tuntas) , siklus II meningkat menjadi 83,3 % (tuntas). Aktivitas guru pada siklus I pertemuan pertama memperoleh persentase 37,5 % meningkat pada pertemuan kedua menjadi 54,2 %. Pada siklus II pertama meningkat 70,8 % dan peremuan kedua menjadi 87,5 %. Sedangkan aktvitas siswa juga mengalami peningkatan dimana pada siklus I pertemuan pertama 33,3 % meningkat pada pertemuan II menjadi 45,5 %. Siklus II pertemuan petama 70,8 % meningkat menjadi 83,3 %. Dari hasil penelitian ini bahwa Model Pembelajaran inkuiri dapat meningkatkan hasil belajar IPA siswa kelas III SDN 013 Basilam Baru. Kata Kunci : Model, Pembelajaran inkuiri, Hasil Belajar IP

Uji Daya Hambat Dan Analisis Klt-bioautografi Perasan Buah Sawo Manila (Achras Zapota Linn) Terhadap Bakteri Uji Salmonella Thyposa

The inhibitory effect of juice of Sawo Manilas (Achras zapota Linn) fruit on the growth of tested bacteria Salmonella thyposa Linn by using Thin Layer Chromatography (TLC) Bioautography Method had been done. The aim of this research was to test the ability of the juice as an antibacterial compound in inhibitory bacterial growth and also to know which are the chemical compound in inhibitory bacterial growth and also to know which are of the chemical compound separated by TLC still have antibacterial effect after done TLC Bioautography. The result was show that Sawo manilas fruit was potensially to inhibit the growth of Salmonella thyposa with a large diametric inhibitor zone.The result of TLC-Bioautography ware shown 2 active compound of three.Key Words: Inhibitory, Sawo Manila, TLC-Bioautography, Salmonella Thypos

Pemanfaatan Potensi Ganggang Hijau (Ulva Lactuca) sebagai Antioksidan Alami pada Pencegahan Infark Miokard Akut

Acute myocardial infarction is a myocardial necrosis due to blood flow to the heart muscle is disrupted. The occurrence of acute myocardial infarction is usually due to atherosclerosis of coronary arteries. Acute myocardial necrosis caused by total blockage of a coronary artery by a thrombus formed on an unstable atherosclerotic plaque. Radical compounds can cause auto-oxidation reaction that can cause lipid peroxidation which resulted in the accumulation of lipids in the artery walls and cause atherosclerosis are at great risk. Antioxidant compounds capable of capturing free radicals caused by auto-oxidation reaction that can cause lipid peroxidation which resulted in the accumulation of lipids in the artery walls and cause atherosclerosis are at great risk. Melatonin and sulfate content of polysaccharides present in Ulva lactuca.L have antioxidant activity according to several studies that have been done. This research method is done in 2 ways, namely in vitro and in vivo. This in vitro test using qualitative and quantitative tests using DPPH reagent. As for the in vivo test is used to measure the levels of MDA (malonaldehyde). Extracts of green algae (Ulva lactuca L.) has the ability of antioxidants seen from in vitro assays and in vivo. Data percent DPPH radical scavenging (ES50) on average positive control gallic acid and ethanol extracts of green algae (Ulva lactuca L.) respectively, are 0.912 ug / ml and 1426.616 pg / ml. The analysis showed that 200 mg / kg is an ideal dosage to prevent acute myocardial infarction

Spatial assessment on ambient air quality status: a case study in Klang, Selangor

Klang as the center of economic and industrial zone in Malaysia has been exposed to poor air quality condition over the years. This study was conducted to evaluate the spatial variation pattern of air quality status in Klang, Selangor by using a four years (2010-2013) secondary database from the Malaysian Department of Environment (DOE). The finding shows that carbon monoxide (CO) had a strong correlation with nitrogen dioxide (NO2) (r = 0.76, p &lt; 0.001), while Air Pollutant Index (API) had moderate correlation with particulate matter (PM10) (r = 0.64, p &lt; 0.001). Principal Component Analysis (PCA) indicates that the most significant air pollutants were NO2, CO and PM10. Statistical Process Control (SPC) reveals that several PM10 data beyond the limitations of SPC and the national guidelines. This study shows that active collaboration among all relevant environmental departments and agencies should be implemented for the effective management of air quality.Keywords: air quality; correlation; principal component analysis; statistical process control

Effects of feedback control on chaotic convection in fluid-saturated porous media

Thermal convective instability in a fluid-saturated porous layer heated from below and cooled from above is investigated theoretically using dynamical systems approach. A feedback control strategy with an array of sensors situated at the top plate of the fluid layer is adopted. The Galerkin truncated approx�imation is employed to derive a low dimensional Lorenz-like model. It is shown that suppression or enhancement of chaotic convection is possible via feedback control