Effects Of Strontium And Samarium Dopants On The Dielectric Properties Of Nickel Oxide

Nickel oxide (NiO) has attracted many researchers to explore its uses in apllications such as electrochoramic films, catalyst, gas sensor, diode and others. This is due to its high properties in chemical, electrical and optical stabilities. In this research, the effect of strontium ions (Sr2+) and samarium ions (Sm3+) dopants on dielectric properties of NiO was investigated. The dielectric properties studied in this research are dielectric constant, εr and dielectric loss, tan δ. The electroceramic system of Ni(1-x)SrxO, Ni(1-x)SmxO where x = 0.01 to 0.10 mol.% and SrxSmyNi(1-x-y)O, where x = 0.03, y = 0.01 to 0.10 mol.% were prepared through solid state reaction method. The samples were sintered at 1200 °C (3 hours soaking time), respectively. Ni(1-x)SrxO was sintered at 1100 to 1300 ºC (1, 3, 6 and 10 hours soaking time). Sample that sintered at 1200 ºC for 3 hours soaking time was identified as optimum sintering parameters. X-Ray diffraction (XRD) analysis on sintered sample showed the phase formation of Ni(1-x)SrxO, Ni(1-x)SmxO and Ni(1-x-y)SrxSmyO. Field Emission Scanning Electron Microscopy (FESEM) observation on the Ni(1-x)SrxO shows the grain size becoming larger with the increasing sintering temperature. The FESEM was repeated with Ni(1-x)SmxO and Ni(1-x-y)SrxSmyO. The three systems showed their grain size was increasing with increasing amount of dopants. The densification of Ni(1-x)SrxO, Ni(1-x)SmxO and Ni(1-x-y)SrxSmyO was improved using Sr2+ and Sm3+ doping and the porosity decrease at higher dopant concentration (x, y). The dielectric behaviour is measured in a wide frequency range of 1 to 1000 MHz. The increase of εr is associated with the decrease of tan δ. The optimum composition for Ni(1-x)SrxO and Ni(1-x)SmxO was obtained for x equals to 0.03 and 0.05 mol.% sample with highest εr (3.24 x 103 and 4.85 x 103) and lowest tan δ (1.42 and 0.19) at 1 MHz. The optimum composition for Ni(1-x-y)SrxSmyO, was obtained at y = 0.03 mol.% sample with highest εr (5.41 x 103) and lowest tan δ (0.13) at 1 MHz

THE EFFECTIVENESS OF THE USE OF COURSE REVIEW HORAY (CRH) METHODS TO IMPROVE NUMERACY DIVISION SKILL OF CHILDREN WITH MILD MENTAL RETARDATION IN SLB NEGERI SURAKARTA, INDONESIA YEAR 2016/2017

This research aimed to investigate the effectiveness of the use of Course Review Horay (CRH) methods to improve numeracy division skill of children with mild mental retardation in class IV of SLB Negeri Surakarta in the academic year of 2016/2017. This study used a quantitative approach with Pre-Experimental type (One Group Pretest-Posttest Design). The subject was six students with mild mental retardation from class IV. The data of this research was collected by test. Based on the calculations using SPSS 23, found that the average value during the pretest was 51,67 which experienced a significant increase in the average posttest value was 76,67. It can be concluded that the use of Course Review Horay (CRH) methods is effective to improve numeracy division skill of children with mild mental retardation in class IV of SLB Negeri Surakarta in the academic year of 2016/2017.  Article visualizations

In vitro Assessment of Two Species of the Genus Pinus Growing in Algeria for their Antimicrobial and Antioxidant Activity

A comparative study of the hydrodistilled oils of Pinus pinea L. and Pinus pinaster Aiton by GC and GC-MS was conducted. The combined essential oil of P. pinea was rich in limonene (56.5%), followed by α-pinene (6.5%) and β-phellandrene (6.2%). The major compounds from the combined essential oil of P. pinaster were: α-pinene (36.4%), β-pinene (12.3%) and (E)-β-caryophyllene (7.1%). The results showed that the oils have a great potential as antibiotics against some microorganisms: Klebsiella pneumoniae, Enterococcus faecalis and Candida albicans. The maximum zone of inhibition of P. pinea was obtained against Candida albicans (23 mm). Antioxidant capacity was assessed by in vitro testing using 2,2-diphenyl- 1-picrylhydrazyl (DPPH) assay and significant activity was found for the various oils. These results suggested that essential oils of P. pinea and P. pinaster possess antimicrobial and antioxidant properties, and could, therefore, present potential source of active ingredients for food and pharmaceutical industry

Pengaruh Penggunaan Gadget Terhadap Kejadian Miopia Pada Anak Usia Sekolah (4-17 Tahun) Di Poli Mata Rumah Sakit Islam Jemursari Surabaya

Pendahuluan: Kelainan refraksi merupakan gangguan penglihatan terbanyak diseluruh dunia, diantara kelainan refraksi tersebut yang paling sering dijumpai adalah miopia. Miopia dapat disebabkan oleh faktor genetik maupun faktor lingkungan, salah satunya dengan melakukan aktivitas melihat dekat seperti menggunakan gadget. Penggunaan gadget dimasa sekarang ini sangat dibutuhkan dalam kehidupan sehari-hari. Setidaknya 30 juta anak-anak dan remaja di Indonesia menggunakan media digital sebagai pilihan utama saluran komunikasi yang mereka gunakan. Tujuan penelitian ini adalah untuk Menganalisis adanya pengaruh penggunaan gadget meliputi posisi, jarak, lama penggunaan, dan pencahayaan ruang terhadap kejadian miopia pada anak usia sekolah (4-17 tahun). Metode Pelaksanaan: Penelitian yang dilakukan bersifat survey analitik dengan pendekatan cross sectional. Populasi penelitian ini adalah pasien anak usia sekolah (4-17 tahun) di Poli Mata Rumah Sakit Islam Jemursari Surabaya yang bersedia dilakukan penelitian dengan jumlah sampel 31 orang. Sampel diambil secara purposive sampling dengan teknik pengambilan data menggunakan kuesioner dan rekam medis responden. Analisis dilakukan dengan menggunakan uji regresi logistik ordinal. Hasil dan Pembahasan: Berdasarkan hasil penelitian sebagian besar menggunakan posisi duduk (61,3 %), menggunakan jarak ≥30 cm (54,8 %), dengan durasi selama ≥2 jam (54,8 %), dan menggunakan pencahayaan ruang yang redup (51,6 %). Sebagian besar responden memiliki visus miopia ringan (54,8 %). Berdasarkan analisis uji regresi logistik ordinal ada pengaruh jarak saat menggunakan gadget terhadap kejadian miopia (p=0,049). Tidak terdapat pengaruh posisi tubuh, lama penggunaan, dan pencahanyaan ruang saat menggunakan gadget terhadap kejadian miopia yang signifikan secara statistik (p=0,339; p=0,239; p=0,301). Kesimpulan: Hanya variabel jarak yang memiliki pengaruh yang signifikan secara statistik terhadap kejadian miopia, sedangan untuk variabel posisi tubuh, lama penggunaan, dan pencahayaan ruang tidak memiliki pengaruh yang signifikan

Think tank initiative 2018 Policy community survey Final report on South Asia June 28, 2018

This report presents the results of the South Asia survey and presents the views of senior-level policy stakeholders surveyed in 5 South Asian countries, i.e.: Bangladesh, India, Nepal, Pakistan and Sri Lanka. For an overview of the findings of the studies undertaken across the three core regions, please consult the Global Report, http://hdl.handle.net/10625/57470.In 2018, the Think Tank Initiative (TTI) commissioned GlobeScan a global stakeholder research consultancy, to conduct a survey of policy stakeholders in three regions: Africa, Latin America, and South Asia. Through the Policy Community Survey, the Think Tank Initiative aims to aims to better understand the information needs and uses of policy actors in specific countries, as well as their perceptions of think tanks. This report presents the results of the South Asia survey

Think tank initiative 2018 Policy community survey Final report on Latin America July 27th, 2018

This report presents the results of the Latin America survey and presents the views of senior-level policy stakeholders surveyed in 7 Latin American countries, i.e.: Bolivia, Ecuador, El Salvador, Guatemala, Honduras, Paraguay and Peru. For an overview of the findings of the studies undertaken across the three core regions, please consult the Global Report, http://hdl.handle.net/10625/57470.In 2018, the Think Tank Initiative (TTI) commissioned GlobeScan a global stakeholder research consultancy, to conduct a survey of policy stakeholders in three regions: Africa, Latin America, and South Asia. Through the Policy Community Survey, the Think Tank Initiative aims to better understand the information needs and uses of policy actors in specific countries, as well as their perceptions of think tanks

Think tank initiative 2018 Policy community survey Final report on Indonesia

This report presents the results of the Indonesia survey.In 2018, the Think Tank Initiative (TTI) commissioned GlobeScan a global stakeholder research consultancy, to conduct a survey of policy stakeholders in three regions: Africa, Latin America, and South Asia. Through the Policy Community Survey, the Think Tank Initiative aims to aims to better understand the information needs and uses of policy actors in specific countries, as well as their perceptions of think tanks

2018 Policy community survey - Global report prepared for the Think Tank Initiative Feb. 2019

This report presents an overview of the findings of the survey undertaken in 20 countries and reflects the views of senior-level policy developers and influencers in Africa, Latin America, and South Asia. This publication is the last of a series of Policy Community Surveys; the previous surveys were conducted in 2010 and 2013.In 2018, the Think Tank Initiative (TTI) commissioned GlobeScan a global stakeholder research consultancy, to conduct a survey of policy stakeholders in three regions: Africa, Latin America, and South Asia. Through the Policy Community Survey, the Think Tank Initiative aims to better understand the information needs and uses of policy actors in specific countries, as well as their perceptions of think tanks

Algarrobo blanco, “el árbol” y los servicios ecosistémicos

Algarrobo blanco, su nombre científico es Prosopis alba Griseb. y pertenece a la familia de las Fabáceas (Leguminosas). “Prosopis” es el nombre en griego para la bardana, que por razones desconocidas se le otorgó también a este género. En cuanto a la palabra “alba” deriva de un epíteto en latín que significa blanco. Al algarrobo blanco se lo conoce también por el nombre de árbol blanco, o simplemente árbol.EEA Santiago del EsteroFil: Gomez, Adriana Teresita. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; ArgentinaFil: Salim, Nadia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; ArgentinaFil: Gomez, Carlos Eugenio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentin