Visible and infrared photocurrent enhancement in a graphene-silicon Schottky photodetector through surface-states and electric field engineering

The design of efficient graphene-silicon (GSi) Schottky junction photodetectors requires detailed understanding of the spatial origin of the photoresponse. Scanning-photocurrent-microscopy (SPM) studies have been carried out in the visible wavelengths regions only, in which the response due to silicon is dominant. Here we present comparative SPM studies in the visible ($\lambda$ = 633nm) and infrared ($\lambda$ = 1550nm) wavelength regions for a number of GSi Schottky junction photodetector architectures, revealing the photoresponse mechanisms for silicon and graphene dominated responses, respectively, and demonstrating the influence of electrostatics on the device performance. Local electric field enhancement at the graphene edges leads to a more than ten-fold increased photoresponse compared to the bulk of the graphene-silicon junction. Intentional design and patterning of such graphene edges is demonstrated as an efficient strategy to increase the overall photoresponse of the devices. Complementary simulations and modeling illuminate observed effects and highlight the importance of considering graphene's shape and pattern and device geometry in the device design

Membangun Customer Relationship Management dalam Bisnis

Customer relationship management dapat dijadikan alat oleh Perusahaan dalam mengembangkan bisnisnya agar mendapat perhatian dari customer dan pasar. Paper ini disusun berdasarkan penelitian yang menggambarkan hubungan bisnis dan pengaruh pelanggan terhadap Perusahaan, serta bagaimana sebuah customer relationship management dapat membantu Perusahaan dalam meraih pangsa pasar. Data dan informasi dalam studi ini didapatkan dari studi pustaka yang mengacu pada buku referensi dan jurnal yang berhubungan dengan topik yang ada. Paper ini memberi pengetahuan tentang pencapaian tujuan Perusahaan yang didukung penerapan customer relationship management

Peningkatan Aktivitas Belajar Siswa Menngunakan Metode Demonstrasi Pembelajaran IPA Disekolah Dasar

The aim of this is generally to get accurate information to improve student learning activities in science teaching in class III elementary school Eka Tjipta Kencana Marau Ketapang. The method used is descriptive method . there is increased actvity at baseline study is 22,4% increased to 42,3% in the first cycle, the second cycle increased to 57% and then increased to 91.9% in the third cycle. Difference improvement from the first cycle to the second cycle of 14,7% then the diffrence increased from cycle II to cycle III of 34,4%. This the average score of students' learning activities in cycle I and II are categorized lower then the third cycle being considered

PENINGKATAN AKTIVITAS BELAJAR SISWA MENNGUNAKAN METODE DEMONSTRASI PEMBELAJARAN IPA DISEKOLAH DASAR

Abstrak: Tujuan penelitian ini secara umum mendapatkan informasi yang akurat untuk meningkatkan aktivitas belajar siswa dalam pembelajaran IPA dikelas III Sekolah Dasar Eka Tjipta Kencana Marau Ketapang. Metode yang digunakan adalah metode deskriptif. Terdapat peningkatan aktifitas belajar pada baseline yaitu 22,4% meningkat pada siklus I menjadi 42,3% pada siklus 1, pada siklus II meningkat menjadi 57% kemudian meningkat menjadi 91.9% pada siklus III. Selisih peningkatan pada siklus I ke siklus II sebesar 14,7% kemudian selisih peningkatan dari siklus II ke siklus III 34,4%. Dengan demikian skor rata-rata aktivitas belajar siswa pada  siklus I dan II dikategorikan rendah kemudian pada siklus III dikategorikan sedang.   Kata Kunci: aktivitas Belajar, Metode Demonstrasi, IPA Abstract: The aim of this is generally to get accurate information to improve student learning activities in science teaching in class III elementary school Eka Tjipta Kencana Marau Ketapang. The method used is descriptive method . there is increased actvity at baseline study is 22,4% increased to 42,3% in the first cycle, the second cycle increased to 57% and then increased to 91.9% in the third cycle. Difference improvement from the first cycle to the second cycle of 14,7% then the diffrence increased from cycle II to cycle III of 34,4%. This the average score of students’ learning activities in cycle I and II are categorized lower then the third cycle being considered.   Keywords: Activities Learning, method menonstratio