Selective Laser Sintering of Polymer Nanocomposites

This paper describes the fabrication and characterization of polymer nanocomposite (PNC) materials for use in the selective laser sintering (SLS) process. PNC materials are of great interest generally because of their excellent physical properties, and offer excellent potential in rapid manufacturing of structural polymeric parts. Three different nano additive materials have been used: cerium oxide IV, yttrium stabilized zirconia, and layered Hectorite clay. These materials have been used to reinforce PA6 polymer using solution blending and spray drying to create powder with particle sizes in the range of 5-40 µm. The mechanical properties and microstructure of the PNC materials have been evaluated and the results compared to those of unfilled polymer.Mechanical Engineerin

Information of Personality Disorder as a Negative Impact of Social Media Through Infographic for Teenagers

The development of current technology makes the flow of information is speeding up. Nowadays, people have a dependency on using social media leaning to increase. Most people utilize social media for communication, socialization, or just lifestyle. From the internet, we can get everything, start from information about the recipes to personal information about someone. This is possible because a lot of people want to share personal information on social media. All easiness which obtained from social media surely helps activity in our life. It has benefited and also has a disadvantage, if we ex-ploit it excessively one of the negative effects, we can receive is a personality disorder. Most people do not recognize this negative effect from social media utilize if we ignore this personality disorder, it can directly impact teen mental develop-ment. Therefore, it needs media that can inform recognize the initial stage of personality disorder that causes by social media exploitation. The qualitative methods were used in this study, whereas the collection of data is done through observation, interview, and literature study. The outcome data processing made into a reference for displaying information content on personality disorders. Communication design theory, visual communication design, infographics, illustrations, colors, typography, and layouts are the basis for infographic media design. Infographic visualization as visual communication media can deliver the information that is able to be accessed by the teen. The research result expected to be the aid that can help teens be wiser in social media utilization and exploitation. Keywords: Personality Disorder, Infographic, Social Medi

Change in Spatial and Temporal Characteristics of Rainfall in East Java Province in Relation to Global Climate Change Perubahan Karakteristik Curah Hujan Menurut Ruang Dan Waktu Di Provinsi Jawa Timur Dalam Kaitannya Dengan Perubahan Iklim ...

This study aims to analyze spatial and temporal variation of rainfall in the year 1971 until the year 2007 that is divided into two (2) periods ie 1971-1989 and 1990-2007 in relat ion to climate global change. The research was conducted in the area of East Java province from July until December 2008. The secondary data used in the research were: 1) Rainfall monthly data from 106 stations located in East Java within the period of 1971-2007 obtained from the Agency for Meteorology and Geophysical Karangploso Malang, 2) Sea Surface Temperature Nino 3.4 (http ://www.cpc.ncep.noaa.gov.), 3) Soil map scale 1: 250,000 obtanined from the Center Institute for Environmental Resource Management of Agriculture, and the map of Agroecological Zone (AEZ) of East Java scale 1: 250,000 from Assessment Institute for Agricultural Technology East Java. The analysis of rainfall characteristic consists of a) the changes of climate type Oldeman, b) the changes of the early dry and rainy season, c) the changes in of rainfall amount in dry and rainy season. The results showed that in 1971-1989 periods, the type of Oldeman climate in East Java vary from B1 to E, but after the 1990s the type of Oldeman climate change varied from C1 to D4 meaning that a part of East Java area (16.7%) become drier and 17.8% area of East Java became wet. The analysis of rainfall stations (106 stations) showed that some of rainfall stations (58.49%) have decreased the number of dry season rainfall about 3 - 500 mm/season. 56 stations (52.8%) have increased the number of rainy season rainfall in the range 1-600 mm /rainy season, while the 49 rainfall stations (46.22%) have decreased the number of rainfall in the range of 1-500 mm/season. Changes in the characteristics of rainfall in East Java, which occurred within the period of 1971-1989 and 1990-2007 was caused by the ENSO phenomenon

Sikap Petani terhadap Penerpan Teknologi Budidaya Kedelai Lahan Pasang Surut (di Kelurahan Simpang Kecamatan Berbak Kabupaten Tanjung Jabung Timur)

Penelitian ini mengkaji tentang sikap petani terhadap penerapan teknologi budidaya kedelai di lahan pasang surut dengan tujuan mengetahui sikap petani terhadap penerapan teknologi budidaya kedelai di lahan pasang surut danmengetahui hubungan sikap petani terhadap penerapan teknologi budidaya kedelai di lahan pasang surut. Tinggi rendahnya USAhatani kedelai ini dipengaruhi oleh sikap petani itu sendiri yang didalamnya terdiri dari afektif, kognitif dan konatif. Komponen kognitif berisi kepercayaan seseorang mengenai apa yang berlaku atau apa yang benar bagi objek sikap, komponen afektif menyangkut masalah emosional subjektif seseorang terhadap suatu objek sikap dan komponen konatif menunjukkan bagaimana prilaku atau kecenderungan berprilaku yang ada dalam diri seseorang berkaitan dengan sikap yang dihadapinya. Penelitian ini dilaksanakan pada tanggal 29 April sampai 29 Mei 2013 di Kelurahan Simpang Kecamatan Berbak Kabupaten Tanjung Jabung Timur.Pengumpulan data pada penelitian ini terdiri dari data primer dan data skunder. Untuk memperoleh data yang lebih mendalam dilakukan wawancara dengan bantuan kuisioner dengan pemberian score pada setiap pertanyaan. Penelitian ini menghasilkan data bahwa sikap petani yang terdiri dari aspek kognitif, afektif dan konatif terhadap penerapan tekonologi budidaya kedelai di lahan pasang surut tergolong tinggi dengan kesimpulan bahwa konsep sikap dan penerapan teknologi di daerah penelitian terlaksana dengan baik

High In-Vitro Antitumour Activity of Triphenyltin Coumarin 3-Carboxylate and its Coordination Complexes With Monodentate Oxygen Donor Ligands Against the Epstein Barr Virus (EBV)-DNA Positive Raji and the P-388 Murine Leukaemia Cell Lines, and Evidence for the Suppression by Organotin of the Early Antigen Complex in the EBV Lytic Cycle

Triphenyltin coumarin-3-carboxylate and its coordination complexes with ethanol, triphenylphosphine oxide, triphenylarsine oxide, diphenylcyclopropenone and quinoline N-oxide exhibited high in vitro cytotoxicity (LC50 values in the range 0.25-3.4 μg/mL) when tested against EBV-DNA positive Raji cells and P-388 leukaemia cells, compared to the standard drug 5-Fluorouracil, which showed LC50 values of 11 and >50 μg/mL, respectively, against these cells. Additional tests performed on the Raji cells incubated with the quinoline N-oxide complex in the presence of the tumour promoters, TPA and sodium butyrate, revealed that the diffused and restricted protein components of the early antigen complex were suppressed relative to the control containing only the promoters, indicating impaired function of the genes involved as transactivators in the early lytic cycle of the EBV. The failure of the restriction enzymes Eco R1 and Hind III to cleave the extracted DNA from such treated cells in contrast to the control, coupled with the amplification of the BMLF-1 gene by the PCR technique which was realised only with the DNA of the control and not of the treated sample, point to a punitive interaction of the organotin with the nuclear DNA of the Raji cells

An analysis of safety perception in the street of Kuala Lumpur

Urban safety is an important focus area of Sustainable Development Goals (SDG) and New Urban Agenda (NUA) were developed. Safe City Programme were introduced in Malaysia in 2004 in parallel with DG 11 that aiming on making cities inclusive, safe, resilient and sustainable for the citizens. Safe street contributes to a better quality of life and have been identified as important factor in contributing to a walkable and sustainable city. A safe, vibrant life initiate an active public realm where streets re seen as urban spaces. Pedestrian are encourage to walk when the environment is safe and accessible. Safety perception is the main focus of this research where case study approach is adopted. A mixed method was designed in order to fully evaluate and assess the phenomenon. 150 questionnaires were distributed randomly among pedestrian at Jalan Tuanku Abdul Rahman, Kuala Lumpur and structured observation were performed. Triangulation of both statistical and thematic analysis were conducted and findings from this study revealed that both physical and social elements does contribute to safety perception. Findings demonstrate that as far as sustainable city is concerned, all aspect are crucial and need to be addressed. The aim of this paper is to assess the characteristic of a street in contributing to safety perception

Constraining the Two-Higgs-Doublet-Model parameter space

We confront the Two-Higgs-Doublet Model with a variety of experimental constraints as well as theoretical consistency conditions. The most constraining data are the \bar B\to X_s\gamma decay rate (at low values of M_{H^\pm}), and \Delta\rho (at both low and high M_{H^\pm}). We also take into account the B\bar B oscillation rate and R_b, or the width \Gamma(Z\to b\bar b) (both of which restrict the model at low values of \tan\beta), and the B^-\to\tau\nu_\tau decay rate, which restricts the model at high \tan\beta and low M_{H^\pm}. Furthermore, the LEP2 non-discovery of a light, neutral Higgs boson is considered, as well as the muon anomalous magnetic moment. Since perturbative unitarity excludes high values of \tan\beta, the model turns out to be very constrained. We outline the remaining allowed regions in the \tan\beta-M_{H^\pm} plane for different values of the masses of the two lightest neutral Higgs bosons, and describe some of their properties.Comment: 17 pages, 17 figure

Immobilization of halophilic Aspergillus awamori EM66 exochitinase on grafted k-carrageenan-alginate beads

A novel extreme halophilic exochitinase enzyme was produced by honey isolate Aspergillus awamori EM66. The enzyme was immobilized successfully on k-carrageenan-alginate gel carrier (CA) with 93 % immobilization yield. The immobilization process significantly improved the enzyme specific activity 2.6-fold compared to the free form. The significant factors influencing the immobilization process such as enzyme protein concentration and loading time were studied. Distinguishable characteristics of optimum pH and temperature, stability at different temperatures and NaCl tolerance for free and immobilized enzyme were studied. The immobilization process improved optimum temperature from 35 to 45 °C. The immobilized enzyme retained 76.70 % of its activity after 2 h at 75 °C compared to complete loss of activity for the free enzyme. The reusability test proved the durability of the CA gel beads for 28 cycles without losing its activity