Forward charm-production models and prompt neutrinos at IceCube

We investigate the prompt neutrino background at IceCube, as determined from forward charm. We consider the role of intrinsic charm and of a recombination model and show that the contribution of these mechanisms is at most a factor two.Comment: 10 pages, 6 figures; v2: Improved discussion, figures; no changes in results; version accepted for publication in JHE

Warm tachyonic inflation in warped background

We analyze warm tachyonic inflation, proposed in the literature, but from the viewpoint of four dimensional effective action for tachyon field on a non-BPS D3-brane. We find that consistency with observational data on density perturbation and validity of effective action requires warped compactification. The number of background branes which source the flux is found to be of the order of 10 in contrast to the order of $10^{14}$ in the standard cold inflationary scenario.Comment: 9 pages, RevTe

Auroras on Mars: from Discovery to New Developments

Auroras are emissions in a planetary atmosphere caused by its interactions with the surrounding plasma environment. They have been observed in most planets and some moons of the solar system. Since their first discovery in 2005, Mars auroras have been studied extensively and is now a rapidly growing area of research. Since Mars lacks an intrinsic global magnetic field, its crustal field is distributed throughout the planet and its interactions with the surrounding plasma environment lead to a number of complex processes resulting in several types of auroras uncommon on Earth. Martian auroras have been classified as diffuse, discrete and proton aurora. With new capability of synoptic observations made possible with the Hope probe, two new types of auroras have been observed. One of them, which occurs on a much larger spatial scale, covering much of the disk, is known as discrete sinuous aurora. The other subcategory is one of proton auroras observed in patches. Further study of these phenomena will provide insights into the interactions between the atmosphere, magnetosphere and the surrounding plasma environment of Mars. We provide a brief review of the work done on the subject in the past 17 years since their discovery, and report new developments based on observations with Hope probe.Comment: 14 pages, 7 figure

EFEKTIVITAS MODEL PEMBELAJARAN PROJECT BASED LEARNING PADA MATA PELAJARAN GAMBAR TEKNIK KELAS X PROGRAM KEAHLIAN TEKNIK INSTALASI TENAGA LISTRIK DI SMKN 2 KLATEN

EFEKTIVITAS MODEL PEMBELAJARAN PROJECT BASED LEARNING PADA MATA PELAJARAN GAMBAR TEKNIK KELAS X PROGRAM KEAHLIAN TEKNIK INSTALASI TENAGA LISTRIK DI SMKN 2 KLATEN Oleh: ANDOKO RATRI PRANJONO NIM. 10518241023 ABSTRAK Penelitian ini bertujuan untuk mengetahui efektivitas model Project Based Learning dibandingkan dengan model pembelajaran Teacher Centered untuk meningkatkan hasil belajar siswa dalam: (1) ranah kognitif, (2) ranah afektif, (3) ranah psikomotor. Jenis penelitian ini adalah Quasi-Experiment dengan desain penelitian Non-Equivalent Control Grup Design. Subjek penelitian ini adalah siswa kelas X TITL A dan X TITL B Program Keahlian Teknik Instalasi Tenaga Listrik di SMK Negeri 2 Klaten dengan jumlah 67 siswa. Kelas X TITL A dijadikan sebagai kelompok eksperimen dengan jumlah 33 siswa dan kelas X TITL B dijadikan sebagai kelompok kontrol dengan jumlah 34 siswa. Teknik pengumpulan data pada ranah kognitif menggunakan tes, pada ranah afektif menggunakan angket, dan ranah psikomotor menggunakan lembar data observasi. Analisis data yang digunakan untuk ranah kognitif mengacu pada teori Richard R. Hake yaitu gain scores (peningkatan nilai), untuk ranah afektif dan psikomotor menggunakan metode perbandingan rerata skor. Kesimpulan dari penelitian ini hanya berlaku pada kelas X Program Keahlian Teknik Instalasi Tenaga Listrik di SMKN 2 Klaten, karena peneliti menggunakan seluruh anggota populasi sebagai subjek penelitian. Hasil penelitian menunjukkan bahwa penerapan model Project Based Learning dibandingkan dengan model pembelajaran Teacher Centered Learning pada siswa kelas X Program Keahlian Teknik Instalasi Tenaga Listrik di SMKN 2 Klaten lebih efektif untuk meningkatkan: (1) kognitif siswa dengan hasil rerata kelompok eksperimen adalah 0,76 (tinggi) sedangkan kelompok kontrol sebesar 0,35 (sedang), (2) afektif siswa dengan perbandingan rerata skor afektif kelompok eksperimen yang memperoleh nilai sebesar 82,10 sedangkan kelompok kontrol sebesar 76,10, (3) psikomotor siswa dengan perbandingan rerata skor psikomotor kelompok eksperimen sebesar 80,81 dan kelompok kontrol sebesar 75,71. Kata kunci: Project Based Learning, kognitif, afektif, psikomotor, metode Richard R. Hake (peningkatan nilai

The Inside Mystery of Jejunal Gastrointestinal Stromal Tumor: A Rare Case Report and Review of the Literature

Gastrointestinal stromal tumors (GISTs) are malignant and rare form of soft tissue sarcoma of the digestive tract. The incidence of gastrointestinal stromal tumors is very low Kramer et al. 2005 Jejunal GISTs are extremely rare. Here we present a rare case of jejunal GIST with unusually large size at presentation. The patient presented with severe abdomen pain, exophytic growth, and dimorphic anemia. Surgical resection of the tumor was carried out, and operative findings revealed a 15 × 10 cm growth, arising from serosal surface of jejunum, at the antimesenteric surface. Diagnosis in this case was made by subjecting the resected specimen to immunohistochemical analysis. In view of large size of the resected tumor, and high-risk histopathological features, imatinib mesylate 400 mg once daily was given as adjuvant chemotherapy. Patient is asymptomatic without any evidence of tumor recurrence after six months of postoperative followup. Imatinib as such is recommended in metastatic, residual or recurrent cases of GISTs or which are surgically not removable; however, recent recommendations suggests the use of imatinib mesylate after radical surgery in high-risk cases, because it has shown a significant decrease in the recurrence rate, and the Food and Drug Administration (FDA) has also approved the use of imatinib as adjuvant therapy after complete resection of localized, primary GIST

High-Harmonic Generation in the Water Window from mid-IR Laser Sources

We investigate the harmonic response of neon atoms to mid-IR laser fields (2000-3000nm) using a single-active electron (SAE) model and the fully ab initio all-electron R-Matrix with Time-dependence (RMT) method. The laser peak intensity and wavelength are varied to find suitable parameters for high-harmonic imaging in the water window. Comparison of the SAE and RMT results shows qualitative agreement between them as well as parameters such as the cutoff frequency predicted by the classical three-step model. However, there are significant differences in the details, particularly in the predicted conversion efficiency. These details indicate the possible importance of multi-electron effects, as well as a strong sensitivity of quantitative predictions on specific aspects of the numerical model

Effect of vitamins and growth regulators on the vegetative growth of Lentinus squarrosulus

Abstract The experiments were carried out to observe the effect of vitamins and growth regulators on the vegetative growth of Lentinus squarrosulus (Mont.) Singer. Out of the vitamins and growth regulators employed, nicotinic acid and gibberellic acid, respectively supported the maximum vegetative growth for this mushroom