Pembangunan Aplikasi Game Android Pengenalan Pola Warna Pada Paud Posdaya

Pendidikan anak usia dini (PAUD) adalah jenjang pendidikan sebelum jenjang pendidikan dasar yang merupakan suatu upaya pembinaan yang ditujukan bagi anak berusia dua sampai dengan usia enam tahun. Salah satu aspek dalam kecerdasan yang harus dikembangkan oleh anak usia dini adalah warna. Mereka harus mengenal berbagai jenis warna yang ada. Hal ini harus dilatih untuk mempersiapkan anak usia dini masuk ke jenjang pendidikan selanjutnya. Selain itu, pengenalan warna untuk anak usia dini juga dapat mendeteksi dan mengidentifikasi buta warna pada anak. Hal ini sangatlah penting untuk kelanjutan kehidupan anak dan pendidikan yang akan orang tua berikan kepada anak. Dalam penelitian ini akan dibuat pengenalan pola warna dalam bentuk permainan ponsel dimana saat ini banyak orang tua sudah menggunakan ponsel pintar dalam kehidupan sehari-hari sehingga kita dapat memanfaatkan ponsel pintar tersebut untuk pendidikan. Pengembangan aplikasi ini menggunakan android studio. Pengembangan aplikasi ini menggunakan metode Systems Development Life Cycle. Aplikasi yang dihasilkan adalah program game yang dapat dipasang dalam ponsel pintar khususnya Android. Seluruh fungsionalitas dalam aplikasi ini sudah diuji dan dapat memenuhi harapan dari peneliti untuk mengemas pendidikan dalam game. Pengemasan pendidikan dalam rupa game juga akan menambah daya tertarik anak untuk mempelajari sesuatu yang baru

Studi Awal Pengaruh Metode Ekstraksi Terhadap Rendemen Dan Kadar Asiaticoside Dari Centella Asiatica (L) Urb

PRELIMINARY STUDY ON INFLUENCEOF METHOD OF EXTRACTION TO YIELD AND CONTENT OF ASIATICOSIDE FROM CENTELLA ASIATICA (L) URB. The process of extracting Canella Asiatic (L) Rub with maceration, sonication, soxhletation and CO2 supercriticalmethod had been done. The effect of extraction to the yield and asiaticoside levels of Centella asiatica (L) Urb has been studied. The results of calculation yield of asiaticoside will be seen that the content of asiaticoside (%) by weight of the extraction process of maceration, sonication, soxhletation and CO2 supercritic row as follows: 6.723; 0.187; 3648 and 9.24%. The yield of the highest asiaticoside obtained from CO2 supercritical, since the technology applied on certain pressure and temperature so that the quality of extracted yield determined by how critical the USAge of pressure and temperature was. Due to these conditions, in addition to changing the density of CO2 , also it affected solubility and selectivity of the substance to extract. The higher the pressure and solubility, the total yields will be higher. To determine the presence of compounds of asiaticoside in Centella asiatica (L) Urb, HPLC analysis is used. From the analysis of the chromatogram can be seen that there are only two peaks were detected. The qualitatively compounds of asiaticoside obtained using CO2 supercritical extraction reached higher levels than the other extractionmethods. Because the technological process of CO2 supercritical extraction utilizing the solvent power and physical properties of pure or the blend components, making it easy topenetrate into the wall material in the extraction and dissolving the active compound component selectively with high product quality and contains no solvent residues so it is more pure

Pengaruh Metode Pemisahan Pelarut Dalam Gel Terhadap Sifat Fisik Titania-alumina Sebagai Penyangga Katalis

PENGARUH METODE PEMISAHAN PELARUT DALAM GEL TERHADAP SIFAT FISIK TITANIA-ALUMINA SEBAGAI PENYANGGA KATALIS. TiO2-Al2O3 gel monolitik dalam nisbah mol 0,2 untuk TiO2 dan 0,8 untuk Al2O3 telah dibuat dengan cara hidrolisis dari aluminium sec-butoksida, Al (OC4H9sec)3 dan titanium isopropoksida Ti(OC3H7iso)4 dalam larutan n-propanol dengan katalis asam. Pemisahan pelarut dalam gel dilakukan dengan dua cara, pertama pengeringan pada tekanan atmosfer hingga terbentuk xerogel. Kedua, pemisahan pelarut pada kondisi CO2 superkritik, hingga terbentuk aerogel. Terbentuknya gugus Ti-O, salah satu dari titanium dioksida atau jaringan polimer –Ti-O-Ti-O-Al-O- ditunjukkan dengan adanya puncak antara 500 dan 900 cm-1 yang tajam tetapi lebar pada spektrum infra merah. Puncak yang kuat pada 1635 cm-1 menandakan adanya gugus –OH uluran yang merupakan derajat yang tinggi dari permukaan hidroksilasi. Volume kumulatif pori-pori dari xerogel sangat kecil jika dibandingkan dengan aerogel hasil pemisahan pelarut pada kondisi CO2 superkritik. Fase anatase TiO2 tidak terbentuk selama proses kristalisasi hingga kalsinasi sampai suhu 1000oC. Pengkristalan alumina terjadi secara langsung dari fasa amorf Al2O3 ke fasa α-Al2O3 dan fasa-fasa antara θ- dan γ-Al2O3 tidak teramati. Dari hasil tersebut dapat diperkirakan bahwa selama kalsinasi partikel TiO2 terpisah dari partikel Al2O3 membentuk inti atom rutil sebelum terbentuknya kristal α-Al2O3. Karena itu pembentukan fasa rutile TiO2 akan mempercepat terbentuknya fasa α-Al2O3. Keasaman campuran titania alumina setelah dikalsinasi pada suhu 500 oC lebih tinggi daripada oksidanya masing-masing, yaitu TiO2 dan Al2O3. Hal ini disebabkan oleh terbentuknya asam Lewis dari campuran titania-alumina

Revisiting the Rigidly Rotating Magnetosphere model for σ\sigma Ori E - II. Magnetic Doppler imaging, arbitrary field RRM, and light variability

The initial success of the Rigidly Rotating Magnetosphere (RRM) model application to the B2Vp star sigma OriE by Townsend, Owocki & Groote (2005) triggered a renewed era of observational monitoring of this archetypal object. We utilize high-resolution spectropolarimetry and the magnetic Doppler imaging (MDI) technique to simultaneously determine the magnetic configuration, which is predominately dipolar, with a polar strength Bd = 7.3-7.8 kG and a smaller non-axisymmetric quadrupolar contribution, as well as the surface distribution of abundance of He, Fe, C, and Si. We describe a revised RRM model that now accepts an arbitrary surface magnetic field configuration, with the field topology from the MDI models used as input. The resulting synthetic Ha emission and broadband photometric observations generally agree with observations, however, several features are poorly fit. To explore the possibility of a photospheric contribution to the observed photometric variability, the MDI abundance maps were used to compute a synthetic photospheric light curve to determine the effect of the surface inhomogeneities. Including the computed photospheric brightness modulation fails to improve the agreement between the observed and computed photometry. We conclude that the discrepancies cannot be explained as an effect of inhomogeneous surface abundance. Analysis of the UV light variability shows good agreement between observed variability and computed light curves, supporting the accuracy of the photospheric light variation calculation. We thus conclude that significant additional physics is necessary for the RRM model to acceptably reproduce observations of not only sigma Ori E, but also other similar stars with significant stellar wind-magnetic field interactions.Comment: 16 pages, 17 figures, accepted for publication in MNRA

Electrochemical Oxidation and Sensing of Methylamine Gas in Room Temperature Ionic Liquids

The electrochemical behaviour of methylamine gas in several room temperature ionic liquids (RTILs), [C2mim][NTf2], [C4mim][NTf2], [C6mim][FAP], [C4mpyrr][NTf2], [C4mim][BF4], and [C4mim][PF6] has been investigated on a Pt microelectrode using cyclic voltammetry. A broad oxidation wave at approximately 3 V, two reduction peaks and another oxidation peak was observed. A complicated mechanism is predicted based on the voltammetry obtained, with ammonia gas as a likely by-product. The currents obtained suggest that methylamine has a high solubility in RTILs, which is important for gas sensing applications. The analytical utility of methylamine was then studied in [C4mpyrr][NTf2] and [C2mim][NTf2]. A linear calibration graph with an R2 value of 0.99 and limits of detection of 33 and 34 ppm were obtained respectively, suggesting that RTILs are favourable non-volatile solvents for the electrochemical detection of highly toxic methylamine gas

Investigation of the magnetic field characteristics of Herbig Ae/Be stars: Discovery of the pre-main sequence progenitors of the magnetic Ap/Bp stars

We are investigating the magnetic characteristics of pre-main sequence Herbig Ae/Be stars, with the aim of (1) understanding the origin and evolution of magnetism in intermediate-mass stars, and (2) exploring the influence of magnetic fields on accretion, rotation and mass-loss at the early stages of evolution of A, B and O stars. We have begun by conducting 2 large surveys of Herbig Ae/Be stars, searching for direct evidence of photospheric magnetic fields via the longitudinal Zeeman effect. From observations obtained using FORS1 at the ESO-VLT and ESPaDOnS at the Canada-France-Hawaii Telescope, we report the confirmed detection of magnetic fields in 4 pre-main sequence A- and B-type stars, and the apparent (but as yet unconfirmed) detection of fields in 2 other such stars. We do not confirm the detection of magnetic fields in several stars reported by other authors to be magnetic: HD 139614, HD 144432 or HD 31649. One of the most evolved stars in the detected sample, HD 72106A, shows clear evidence of strong photospheric chemical peculiarity, whereas many of the other (less evolved) stars do not. The magnetic fields that we detect appear to have surface intensities of order 1 kG, seem to be structured on global scales, and appear in about 10% of the stars studied. Based on these properties, these magnetic stars appear to be pre-main sequence progenitors of the magnetic Ap/Bp stars.Comment: v2: Include comment regarding publication source To appear in the proceedings of "Solar Polarisation 4", held in Boulder, USA, Sept. 200

Preparation of Alkyl Halide as Intermediate Compound in Synthesis Cationic Surfactant Alkyl Trimethyl Ammonium Chloride

Cationic surfactant alkyl trimethyl ammonium chloride was synthesized by quartenerisation of tertiary amines. Materials used in quartenerization are tertiary amine and alkyl halide. Alkyl halide is a hydrocarbon derivative in which one or more hydrogen is replaced with halogen. In this research, thionyl chloride is used as a reactant . Thionyl chloride (SOCl2) is often used because it is easier to make, the yield is greater and byproducts are volatile. Alkyl halide is synthesized from the reaction of hexadecyl alcohol with thionyl chloride (SOCl2) at a temperature of 80 ° C for 24 hours in a reflux reactor. This study managed to get hexadecyl chloride from the reaction hexadecyl alcohol and thionyl chloride. It can be seen from the results of FTIR, LC/MS and GC/M