Broadband suppression of backscattering at optical frequencies using low permittivity dielectric spheres

The exact suppression of backscattering from rotationally symmetric objects requires dual symmetric materials where ${\epsilon_r} = {\mu_r}$. This prevents their design at many frequency bands, including the optical one, because magnetic materials are not available. Electromagnetically small non-magnetic spheres of large permittivity offer an alternative. They can be tailored to exhibit balanced electric and magnetic dipole polarizabilities, which result in approximate zero backscattering. In this case, the effect is inherently narrowband. Here, we put forward a different alternative that allows broadband functionality: Electromagnetically large spheres made from low permittivity materials. The effect occurs in a parameter regime that approaches the trivial ${\epsilon_r} \to {\mu_r} =1$ case, where approximate duality is met in a weakly wavelength dependence fashion. Despite the low permittivity, the overall scattering response of the spheres is still significant. Radiation patterns from these spheres are shown to be highly directive across an octave spanning band. The effect is analytically and numerically shown using the Mie coefficients.Comment: 6 Figure

TINJAUAN ATAS BAURAN PEMASARAN PADA PT. MULTI AZAM SEJAHTERA

Bauran pemasaran merupakan kombinasi dari beberapa variabel yang terdiri dari produk, harga, promosi, dan distribusi. Bauran pemasaran menjadi sangat penting dalam sebuah perusahaan. Bauran pemasaran menjadi aspek terpenting bagi PT. Multi Azam Sejahtera dalam menjalankan bisnisnya, dengan menerapkan bauran pemasaran PT. Multi Azam Sejahtera dapat menerapkan strategi- strategi untuk mengembangkan bisnisnya tersebut. Tujuan penelitian ini adalah untuk mengetahui bauran pemasaran yang dilakukan, untuk mengetahui hambatan yang terjadi dan mengetahui bagaimana upaya mengatasi hambatan yang terjadi. Penulis melakukan penelitian adalah di PT. Multi Azam Sejahtera yang merupakan sebuah perusahaan yang bergerak dibidang trading and distributor air minum kesehatan kemasan botol dengan merek azam hexagonal bio energi. Hasil tinjauan menunjukan bahwa bauran pemasaran yang dilakukan oleh PT. Multi Azam Sejahtera adalah produknya berupa air kesehatan dengan merek azam hexagonal bio energi, harga yang ditetapkan lebih tinggi dibandingkan dengan harga para kompetitor, dan distribusi yang dilakukan berupa saluran distribusi langsung yaitu dengan cara langsung mengantarkan produk kerumah konsumen, sedangkan distribusi secara tidak langsung yaitu melakukan kerjasama dengan agen-agen yang tersebar di Jabodetabek dan kota-kota lain. Bentuk promosi yang dilakukan oleh PT. Multi Azam Sejahtera secara langsung yaitu dengan memberikan brosur, melalui word of mouth, Sedangkan promosi secara tidak langsung yaitu melaui telepon, sms, fax, website. Keywords : Bauran Pemasara

Homeschooling: Sebuah Pendidikan Alternatif

This article aims to examine the theoretical concept, classification, and the imple-mentation of homeschooling in Indonesia. The discussion of homeschooling was in the perspective of child development. The conclusion based on the theoretical concept describes that it was an educational form which was done independently by family, and the learning materials were choosen in accordance with the chil-dren need. The homeschooling classification forms was divided into two forms namely single home schooling which was conducted independently by parents in one family withought collaborating with aothers.Compound homeschooling was conducted by two or more families for certain activities, but the main activities re-main to be implemented by the respective parents. Homeschooling was an educa-tion for the children who performed at home and was specifically provided by a parent or a professional tutor. Homeschooling in practice was to move the school from the public area to a more private area, which was home

Pemberian Rangkuman sebagai Strategi Pembelajaran

This paper discusses the provision of a summary as one component of the learning strategy that plays an important role in improving learning outcomes optimally. Summaries can be done at the beginning of learning, and can also be given at the end of the lesson. Giving a summary at the beginning of learning, work gives an overview on the learner about the content of the material will be presented, and help learners to determine attitudes toward the content of these materials will be presented. While granting summary of a presentation made at the end, serves to review the main ideas of the material that has been presented so that there is an opportunity for students to recall material that has been presented it. So the summary is a component of a strategy that includes all the content areas of study are important, such as understanding ¬-brief understanding of the concepts, procedures, or principles learned. There are five types of summaries are often used in learning, namely: verbal summary, summary charts, summary tabulations, summary groves, Summary schematic. While giving a summary of strategies that are often used, namely: learners is asked to make a summary of what has been taught, and learners is asked to make a summary of what has been read to show a better performance

Implementasi Pendidikan Karakter dalam Sistem Full Day School di MIM Unggulan Kota Gorontalo

Kajian ini menganalisis penerapan kebijakan pemerintah berkaitan dengan integrasi nilai dan etika ke dalam setiap mata pelajaran dan internalisasi nilai dan etika melalui kegiatan pengembangan diri bagi seluruh warga madrasah dalam sistem full day school yaitu sekolah sepanjang hari melalui kegiatan pembelajaran, bimbingan, dan latihan. Hasil penelitian menunjukkan pendidikan karakter di MIM Unggulan Kota Gorontalo telah diimplementasikan melalui strategi dan pendekatan yang meliputi:  Integrasi nilai dan etika pada seluruh mata pelajaran dengan mengaitkan aspek nilai ke dalam indikator melalui perencanaan dan pelaksanaan pembelajaran; dan internalisasi nilai dan etika yang ditanamkan oleh semua warga madrasah dalam sistem full day school. Nilai yang diinternalisasikan melalui pembinaan dan keteladanan

Aplikasi Billing Playstation Berbasis Desktop (Studi Kasus : Azea Game Center 2015).

Azea Game center adalah USAha yang bergerak di bidang jasa penyewaan perangkat game. Kegiatan bisnis ini dapat dilaporkan setiap hari. Penulisan laporan di lakukan oleh admin dengan melampirkan buku besar kepada pemilik. Hal ini tentunya belum akurat di karenakan masih mengunakan sistem manual, sistem manual seperti itu dirasa penulis sudah tidak efektif untuk digunakan, Oleh sebab itu perlu dibuat suatu sistem komputerisasi yang dapat melengkapi kebutuhan sistem manual ini. Hal inila h yang mendorong penulis membuat suatu aplikasi billing playstation berbasis desktop dengan mengunakan VB.Net 2010. Penelitian ini bertujuan untuk membuat suatu aplikasi yang dapat melaporkan kegiatan pada Azea Game Center sehingga pengolahan game center akan terlihat dengan jelas. Dan mempermudah admin dalam melakukan pengolahan data, seperti input data, edit data dan menghapus data. Ataupun pengambila n data untuk membantu dalam membuat laporan yang nantiya akan di berikan kepada pimpinan. Penulis juga berharap dengan dibuatnya aplikasi ini dapat membantu operator dalam menjalankan operasional dan memiliki prospek kerja yang lebih baik lagi

Detection of antibiotic-producing bacteria from soil samples in parts of Wudil local government area Kano State, Nigeria

The emergence of new diseases and multiple-antibiotic resistance pathogens that resist the action of clinically used antibiotics have increased the needs of discovering new antibiotics. However, soil served as the most important target for most researchers in their attempt of discovering new antibiotics that have pharmaceutical values. The aim of this study was to detect the antibiotic-producing bacteria from soil samples in parts of Wudil local government of Kano state using standard procedure. The color ranged from light brown to dark brown. The texture ranged from clay loam, clay and loam. Sample C was found to have the highest mean pH and electrical conductivity of 7.46 and 108.90μs/cm, respectively, while sample B had the least mean values of 6.95 and 73.53μs/cm, respectively. The highest mean bulk devsity and particle density was sample B with 1.60g/cm3 and 1.87g/cm3, respectively, while sample C had the least mean values of 1.48g/cm3 and 1.71g/cm3, respectively. Sample C was found to have the highest mean moisture content and porosity with 17.93% and 15.57%, respectively, while sample A had the least mean values with 10.61% and 10.74%, respectively. Four bacterial spp. were identified based on morphological description, gram’s reaction and biochemical tests, and were identified as Bacillus spp., Micrococcus spp., Pseudosomonas spp. and Proteus spp. Sample C was found to have the highest mean total bacterial viable plate count of 19.9×105cfu/g, while sample B had the least mean value of 4.1×105cfu/g. Bacillus spp. was found to have the highest percentage occurrence with 21(47%), while Proteus spp. had the least value with 4(9%). E. coli had the highest and least susceptibility to metabolites produced by Bacillus spp. and Pseudosomonas spp. with inhibition zones of (17 and 0mm) respectively. While the control (Erythromycin 250mg/ml) produced the inhibition zones of (27 and 21mm) against E. coli and S. aureus respectively. It was concluded that soil samples in Lajawa, Kausani, Wudil Sabon gari and Wudil Tsohon gari of Wudil local government contained the bacteria with potentiality of producing antimicrobial substance and recommended the use of molecular techniques for further characterization