Impact of Thermal Stratification on Unsteady Hiemenz Non-Darcy Copper Nanofluid Flow over a Porous Wedge in the Presence of Magnetic Field Due to Solar Radiation (Green) Energy

Energy is an important input for economic development. Solar energy is created by light and heat which is emitted by the sun, in the form of electromagnetic radiation. Solar energy is the most readily and abundantly available source of green energy. Copper nanoparticle suspensions in the Cu-water have been proposed as a means to enhance solar collector efficiency through direct absorption of the incoming solar energy. Thermal stratification is the scientific term that describes the layering of bodies of water based copper nanofluid on their temperature. The aim of the present work is to investigate theoretically the effect of thermal stratification in the presence of magnetic field on unsteady Hiemenz non-Darcy flow and heat transfer of incompressible copper nanofluid along a porous wedge due to renewable (solar energy). It is of notable interest in this work to consider the similarity transformation is used for unsteady flow. Copper nanofluid flow past a porous wedge plays a dominant role on absorbs the incident solar radiation and transits it to the working fluid by convection. Keywords: Nanofluid; Porous wedge; Unsteady non-Darcy flow; Magnetic field; Thermal stratification; Solar energy radiation.

Variable viscosity and thermophoresis effects on Darcy mixed convective heat and mass transfer past a porous wedge in the presence of chemical reaction

An analysis is presented to investigate the effect of thermophoresis particle deposition and variable viscosity on Darcy mixed convective heat and mass transfer of a viscous, incompressible fluid past a porous wedge in the presence of chemical reaction. The wall of the wedge is embedded in a uniform Darcian porous medium in order to allow for possible fluid wall suction or injection. The viscosity of the fluid is assumed to be a inverse linear function of temperature. The results are analyzed for the effect of different physical parameters, such as variable viscosity, magnetic, chemical reaction and thermophoresis parameters, on the flow, the heat and mass transfer characteristics

Scoring Analysis of the Relationship Between Magnetic Resonance Imaging- Anxiety Questionnaire (Mri-aq) with Heart Rate to Patients Anxiety Level at Lumbosacral Mri Examination

Background: Anxiety during MRI examination becomes a common constraint and can have a negative effect that is the quality of the resulting image due to the existence of motion artifacts until the failure of the examination. Purpose: One of the signs of anxiety can be seen an increase in heart rate, in addition there is one questionnaire specifically aimed to determine the level of anxiety in patients with MRI examination, namely Magnetic Resonance Immunization-Anxiety Quistionnaire (MRI-AQ). Method: This research used correlational method with cross-sectional approach. The sampling technique used is purposive sampling. In this research, there were 30 samples. Each sample will be measured heart rate before, during, and after Lumbosacral MRI examination. A Magnetic Resonance Imaging Anxiety Questionnaire (MRI-AQ) was then completed at the time of examination. Collected data were then tested for differences using paired-t test and pearson correlation test. Result: The result of paired-t test shows that there was difference of heart rate during and after examination with p-value 0,036 <α. The patient's heart rate during Lumbosacral MRI was higher than the patient's heart rate after Lumbosacral MRI at 85.63 bpm ± 14.709. Conclusion: Pearson correlation test results showed a correlation between Magnetic Resonance Imaging- Anxiety Questionnaire (MRI-AQ) with heart rate to patient anxiety level at Lumbosacral MRI Examination, this is reinforced by correlation value r = 0.636

Pharmacological Activities of Sonneratia Alba Mangrove Plant : A Review

Indonesia is a country with a high amount of diverse natural resources. Various plants have important roles in supporting human medicinal needs due to their availability in providing various medicinal resources. One of the natural resources is Sonneratia alba, a species of mangrove plant known with high adaptive ability and tolerance to extreme environmental conditions such as high saline stress, light intensity exposure, and free radicals. This review summarized the findings on pharmacological activities of S. alba.  Several studies reported the adaptive ability of S. alba with its various pharmacological activities such as antimalarial, antioxidant, antimicrobial, and anticancer. These activities are strongly correlated with its bioactive constituents such as terpenoid, alkaloid, tannin, quinone, phenolic, and flavonoid. The mechanism of each pharmacological activity has been suggested in several studies. These findings could be beneficial in drug discovery for several infectious and degenerative diseases and in the development of drugs at industrial stage. Keyword: Anticancer, antimalaria, antimicrobial, antioxidant, Sonneratia alba Â

The Role of Ilv5p Interacting Factors in Mitochondrial DNA Stability

The ease of manipulating yeast allows for advanced studies on the factors affecting the mitochondrial DNA mutation rates. The control mechanisms of the mitochondrial DNA mutation rate has been determined to involve the dual function protein, Ilv5p. The Ilv5p plays an integral role in the proper segregation of newly replicated mitochondrial DNA into daughter cells during cell division. The focus of this study is to find unknown factors involved in mitochondrial DNA stability. This study uses the Ilv5p to pull unknown factors out of the many genes that comprise the yeast genome. The identification of interacting factors of the Ilv5p is the focus of this study. We have found proteins likely to physically interact with the Ilv5p and play a role in the stabilization of mtDNA. These proteins have been identified as the Vma8p and the YOL057W gene product. These proteins have been tested and shown to affect the stability of mitochondrial DNA. The Vma8p is the D subunit that comprises the V 1 complex. The V-ATPase that is responsible for ATP synthesis possesses two complexes, the V1 and the V0 complex. The V1 and the V0 complexes readily dissociate and reassociate in response to environmental conditions optimizing acidification of vacuole components for regulation of ATPase activity in other cellular components. The loss of this particular protein increases the occurrence of ρ-petite or non-functional mitochondria. A microsatellite instability assay showed that the mutation rate increased 50 times with the loss of the Vma8p. The respiration loss assay showed the loss of the YOL057W gene product caused a significant increase in the rate of ρ- petite formations. This assay is the first to show that the putative open reading frame (ORF) encodes a protein whose loss of function leads to a mitochondrial defect. The exact role of this particular protein in the mitochondria has yet to be determined

Hubungan Infeksi Soil Transmitted Helminths (STH) dengan Prestasi Belajar pada Siswa SDN 169 di Kelurahan Gandus Kecamatan Gandus Kota Palembang

Infeksi Soil Transmitted Helminths (STH) masih merupakan salah satu masalah kesehatan yang utama di Indonesia. Pada anak-anak sekolah dasar infeksi STH akan menghambat mereka dalam mengikuti pelajaran dikarenakan anak akan merasa cepat lelah, daya konsentrasi menurun, malas belajar dan pusing. Tujuan penelitian ini adalah untuk mengetahui hubungan infeksi STH dengan prestasi belajar pada siswa SDN 169 Kelurahan Gandus, Kecamatan Gandus, Kota Palembang. Jenis penelitian ini adalah penelitian observasional analitik dengan rancangan cross-sectional. Populasi penelitian ini adalah 334 siswa. Dengan proportionate stratified random sampling didapatkan sampel 73 anak.. Data yang dikumpulkan adalah nilai Ujian Tengah Semester (UTS) terakhir dan tinja yang diperiksa di Laboratorium Parasitologi Fakultas Kedokteran Universitas Sriwijaya menggunakan teknik Kato Katz dan Harada Mori modifikasi. Hasil yang diperoleh dianalisis menggunakan uji statistik Fisher\u27s Exact Text. Prevalensi infeksi STH pada siswa SDN 169 Kelurahan Gandus Kecamatan Gandus Kota Palembang adalah 6,8% dengan perbandingan laki-laki 1,3% dan perempuan 5,5%. Kelompok usia 7-8 tahun paling banyak terinfeksi (4,1%). Prestasi belajar yang didapat masih banyak siswa dengan prestasi belajar kurang yaitu 65,8% dengan perbandingan laki-laki 39,8% dan perempuan 26,0%. Hasil uji statistik Fisher Exact diperoleh nilai p = 0,365 (p &gt; 0,05). Tidak terdapat hubungan antara prestasi belajar dan kejadian infeksi STH pada siswa SDN 169 di Kelurahan Gandus

Visualisasi Rumah Idaman dengan Perangkat Komputer Kendali Interaksi Alami

We realize that a dream house is one of the most important objectives for many families. To do this they even do not hesitate to hire a house consultant with high payment. Virtual reality technology actually could answer this problem. People can design their house with the easiest and cheapest way. By exploring, designing, configuring, testing and demonstrating computer hardware and software, we have successfully created a representative tool on house design. All-in-One PC, Kinect and TurboFLOORPLAN are the tool set to make a natural interaction between user and computer to reach an enjoyable home design system

Health risk assessment after exposure to aluminium in drinking water between two different villages.

A cross-sectional study was conducted at Mukim Parit Lubok (MPL) and Parit Raja (PR), Batu Pahat, Malaysia. The main objective of this study was to determine the aluminium concentration in drinking water and to perform health risk assessment prediction among respondents from these two residential areas. A total of 100 respondents were selected from the study areas based on inclusive and exclusive criteria. Two duplicates of treated water samples were taken from each respondent’s house using 200mL high-density polyethylene (HDPE) bottles and 0.4 mL (69%) pure concentrated nitric acid were added as a preservative. Aluminium concentrations were analyzed using a Lambda 25 UV/V spectrophotometer. The result showed that aluminium concentration in drinking water from MPL was 0.18 ± 0.022 mg/L and 0.22 ± 0.044 mg/L for PR. Statistical analysis showed that 14 (28%) water samples collected from MPL and 35 (70%) from PR recorded concentration of aluminium above the standard limit set by the Ministry of Health, Malaysia for drinking water guideline (0.2 mg/L). The mean value of Chronic Daily Intake (CDI) of aluminium in drinking water from PR (0.00707 mg/kg/day) was significantly higher compared to MPL (0.00164 mg/kg/day). Hazard Index (HI) calculation showed that all respondents had “HI” of less than 1. In conclusion, there was an unlikely potential for adverse health effects from aluminium intake in drinking water from both study areas. However, it was necessary for some actions to be taken in order to reduce aluminium levels found in drinking water for both locations