Noble Gas Clusters and Nanoplasmas in High Harmonic Generation

We report a study of high harmonic generation from noble gas clusters of xenon atoms in a gas jet. Harmonic spectra were investigated as a function of backing pressure, showing spectral shifts due to the nanoplasma electrons in the clusters. At certain value of laser intensity this process may oppose the effect of the well-known ionization-induced blueshift. In addition, these cluster-induced harmonic redshifts may give the possibility to estimate cluster density and cluster size in the laser-gas jet interaction range.Comment: 5 pages, 4 figure

Perbandingan Metode Bina Marga Dan Metode Pci (Pavement Condition Index) Dalam Penilaian Kondisi Perkerasan Jalan (Studi Kasus Ruas Jalan Kaliurang, Kota Malang)

The assessment of pavement condition is needed to establish the appropriatemaintenance program. The methods that usually used to evaluate pavement condition arethe method of Bina Marga and PCI (Pavement Condition Index) method. This study aimsto assess the pavement condition of Kaliurang street with these two methods beingcompared.This study used field research in which the primary data was the result ofpavement condition survey. The priority of pavement maintenance of Bina Marga methodrated from 0 to more than 7, while the PCI rated from 0 to 100.The evaluation results of either Bina Marga or PCI method indicate that thepavement of Kaliurang street still has fair performance but needs some maintenance andrehabilitation

Optimal Grid Drawings of Complete Multipartite Graphs and an Integer Variant of the Algebraic Connectivity

How to draw the vertices of a complete multipartite graph $G$ on different points of a bounded $d$-dimensional integer grid, such that the sum of squared distances between vertices of $G$ is (i) minimized or (ii) maximized? For both problems we provide a characterization of the solutions. For the particular case $d=1$, our solution for (i) also settles the minimum-2-sum problem for complete bipartite graphs; the minimum-2-sum problem was defined by Juvan and Mohar in 1992. Weighted centroidal Voronoi tessellations are the solution for (ii). Such drawings are related with Laplacian eigenvalues of graphs. This motivates us to study which properties of the algebraic connectivity of graphs carry over to the restricted setting of drawings of graphs with integer coordinates.Comment: Appears in the Proceedings of the 26th International Symposium on Graph Drawing and Network Visualization (GD 2018

Pemodelan Kecelakaan Sepeda Motor Pada Ruas Jalan Di Kota Atambua

Penelitian ini bertujuan untuk mendeskripsikan dan menganalisa faktor-faktor yang mempengaruhi kecelakaan sepeda motor di Kota Atambua melalui pemodelan. Pemodelan menggunakan metode Generalized Linear Method dengan standar signifikansi sebesar 95%. Berdasarkan hasil pengolahan data hasil survei lalulintas dan survei kendaraan menggunakan program GenStat diperoleh persamaan pemodelan kecelakaan MCA = 0.002902 exp[-0.986 LbLajur – 0.674 LbBahu Jalan + 0.1761 Kecepatan]. Hasil pemodelan menunjukan bahwa faktor-faktor yang mempengaruhi kecelakaan sepeda motor adalah Total Lebar Ruas Jalan dengan koefisien sebesar -0.986, Total Lebar Bahu Jalan dengan koefisien sebesar -0.674, dan 85-Percentile Kecepatan Kendaraan dengan koefisien sebesar 0.1761. Analisa Deskriptif menunjukan bahwa kecelakaan sepeda motor sering terjadi pada pengendara dengan jenis kelamin laki-laki dengan jumlah kasus terbanyak sebesar 40 kasus, dengan rentang usia pengendara 18-25 tahun, yaitu 17 kasus. Kecelakaan sering terjadi pada pengendara dengan profesi swasta, yaitu sebesar 17 kasus dan paling sering terjadi pada rentang waktu pukul 12.00-17.59 yaitu sebanyak 7 kasus. Dari kriteria tipe tabrakan, kecelakaan sering terjadi dengan tipe Tabrak Pejalan Kaki, yaitu terjadi sebanyak 5 kasus dengan tingkat keparahan terbanyak Luka Berat, yaitu sebanyak 14 kasus

Modular detergents tailor the purification and structural analysis of membrane proteins including G-protein coupled receptors

Detergents enable the purification of membrane proteins and are indispensable reagents instructural biology. Even though a large variety of detergents have been developed in the lastcentury, the challenge remains to identify guidelines that allowfine-tuning of detergents forindividual applications in membrane protein research. Addressing this challenge, here weintroduce the family of oligoglycerol detergents (OGDs). Native mass spectrometry (MS)reveals that the modular OGD architecture offers the ability to control protein purificationand to preserve interactions with native membrane lipids during purification. In addition to abroad range of bacterial membrane proteins, OGDs also enable the purification and analysisof a functional G-protein coupled receptor (GPCR). Moreover, given the modular design ofthese detergents, we anticipatefine-tuning of their properties for specific applications instructural biology. Seen from a broader perspective, this represents a significant advance forthe investigation of membrane proteins and their interactions with lipids

Pengukuran Kadar Air Tanah Dengan Menggunakan Gypsum Block

Pekerjaan teknik sipil banyak dilakukan pada tanah tidak jenuh air (unsaturated). Perubahankedudukan muka air tanah akan mempengaruhi tingkat kadar air dalam tanah. Pengukuran kadarair biasanya dilakukan dalam laboratorium yang memerlukan waktu yang lama. Sebagai alternatifgypsum block dapat pakai sebagai alat sensor kadar air yang dapat mempercepat pengukuran kadarair tanah dan langsung dipakai dilapangan setelah dikalibrasi secara individu.Penelitian ini dilakukan terhadap dua jenis tanah yaitu tanah lempung (CH) dan pasir berlanau(SM) dengan volume contoh tanah yaitu menggunakan mold Standard serta USAha pemadatansampel tanah yaitu 25 pukulan per lapis. Pemberian kadar air untuk tanah lempung yaitu 10% ,15% ,20% ,30% dan 40% sedangkan pada sampel pasir berlanau, kadar air yang diberikan yaitu5% ,8% ,11%, 14% dan 17%.Hasil pengujian menunjukkan hubungan kadar air dengan resistansi gypsum block yangmenghasilkan koefisien korelasi (R2) = 0.904 pada sampel uji tanah lempung dan R2 = 0.146 padapasir lanau. Dengan demikian hasil penelitian memperlihatkan bahwa gypsum block dapatdigunakan untuk mengukur kadar air pada tanah lempung, sedangkan pada pasir berlanau,penggunaan gypsum block tidak cocok, karena tidak memberikan hasil yang baik, disebabkanoleh sifat permeabilitas pasir lanau yang besar

Kajian Perbaikan Patahan Pada Runway

At the runway pavement of El Tari Kupang Airport, there was damage in the form of fracture that occurred at the edge of the pavement, which could disrupt aircraft traffic line. Due to the problem, the purposes of this research are to find out the cause of fracture, and to assess the reconstruction of the runway pavement that has been done by PT Angkasa Pura, Kupang. As the research conducted, it was found out that the cause of the fracture was more prevalent due to the lack of drainage system of the Airport. The slope of the runway shoulder was only 1.60% - 1.80%, was improper to the FAA minimum standard of slope that was 2.50% - 5.00%, and the unavailability of inlet pipes for subsurface drainage. The result of reconstruction done by PT Angkasa Pura has fulfilled the FAA standard. The total thickness of the reconstruction is 52.00 cm, is compliant with the minimum thickness of FAA standard 50.07 cm. However, the reconstruction of the pavement would be for short term solution only because of the poor drainage system of El Tari Kupang Airport has not been handled properly