Surface Level Solar Ultraviolet-B-Radiation At Penang [QC459. A793 2006 f rb].

Pengukuran fotometrik jalur lebar bagi sinaran ultralembayung-B (UV-B), ultralembayung-A (UV-A), global dan berbaur suria telah dibuat di Universiti Sains Malaysia (USM) dari tahun 1994 sehingga 2001. Broadband photometric measurements of solar UV-B, UV-A, global and diffuse radiation were made at Universiti Sains Malaysia (USM), Penang from 1994 to 2001

In-Vehicle Data Communication with CAN &Security Monitoring: A Review

Automobiles are now being created with more electronic components for efficient functioning such as Anti Lock Braking system, Adaptive Cruise Control, Traction control system, Airbag, Power Steering etc. managed by networked controllers that include hundreds of ECUs (electronic control units) that can coordinate, control, and monitor loads of internal vehicle components. Each component, such as ABS, TCS (Traction control system), tire pressure monitoring system and telematics system, may communicate with nearby components over the CAN (Controller Area Network) bus, establishing an in-vehicle communication network. These modern automobile system networks intended for safety with minimal consideration for security have drawn the attention of researchers for providing security in CAN. The Paper reviews the behavior and vulnerabilities of CAN within an in-vehicle network including various attacks possible in CAN along with the proposed solutions in the literature with extensive survey on a security promising approach named as IDS (Intrusion detection system)

An Efficient Visual Analysis Method for Cluster Tendency Evaluation, Data Partitioning and Internal Cluster Validation

Visual methods have been extensively studied and performed in cluster data analysis. Given a pairwise dissimilarity matrix D of a set of n objects, visual methods such as Enhanced-Visual Assessment Tendency (E-VAT) algorithm generally represent D as an n times n image I( overlineD) where the objects are reordered to expose the hidden cluster structure as dark blocks along the diagonal of the image. A major constraint of such methods is their lack of ability to highlight cluster structure when D contains composite shaped datasets. This paper addresses this limitation by proposing an enhanced visual analysis method for cluster tendency assessment, where D is mapped to D' by graph based analysis and then reordered to overlineD' using E-VAT resulting graph based Enhanced Visual Assessment Tendency (GE-VAT). An Enhanced Dark Block Extraction (E-DBE) for automatic determination of the number of clusters in I( overlineD') is then proposed as well as a visual data partitioning method for cluster formation from I( overlineD') based on the disparity between diagonal and off-diagonal blocks using permuted indices of GE-VAT. Cluster validation measures are also performed to evaluate the cluster formation. Extensive experimental results on several complex synthetic, UCI and large real-world data sets are analyzed to validate our algorithm

(3-Ethyl-6,7-dimeth­oxy­naphthalen-1-yl)(phen­yl)methanone

The asymetric unit of the title mol­ecule, C21H20O3, contains two crystallographically independent mol­ecules, A and B, which differ in the orientation of the ethyl group substituted on the naphthalene system; the dihedral angles between the ethyl group and the naphthalene system are 7.4 (3) and 68.1 (3)°, respectively, for mol­ecules A and B. The dihedral angles between the benzoyl and naphthalene groups are 64.7 (7) and 69.4 (8)°, respectively, for mol­ecules A and B. The crystal structure features four aromatic π–π stacking interactions [centroid–centroid distances = 4.181 (1), 3.891 (1), 4.423 (1) and 4.249 (1) Å]

1-Benzoyl-4-(4-methyl­phen­yl)phthal­azine

In the title mol­ecule, C22H16N2O, the tolyl and benzoyl rings make dihedral angles 50.2 (5) and 56.4 (5)°, respectively, with the phthalazine ring system while the dihedral angle between the tolyl and benzoyl rings is 0.70 (4)°. The crystal structure is stabilized by inter­molecular C—H⋯O and C—H⋯N hydrogen bonds, as well as weak C—H⋯π inter­actions

DSPSR: Digital Signal Processing Software for Pulsar Astronomy

DSPSR is a high-performance, open-source, object-oriented, digital signal processing software library and application suite for use in radio pulsar astronomy. Written primarily in C++, the library implements an extensive range of modular algorithms that can optionally exploit both multiple-core processors and general-purpose graphics processing units. After over a decade of research and development, DSPSR is now stable and in widespread use in the community. This paper presents a detailed description of its functionality, justification of major design decisions, analysis of phase-coherent dispersion removal algorithms, and demonstration of performance on some contemporary microprocessor architectures.Comment: 15 pages, 10 figures, to be published in PAS

Prevalence of Depression and Anxiety among 10th Standard Exam Going Children in Rural Area of Kancheepuram District

Depression is a common illness worldwide, with an estimate of about 350 million as on 2016. Anxiety is a feeling of worry, nervousness, or unease about something with an uncertain outcome. The annual years of healthy life lost per 100,000 people from anxiety disorders in India has increased by 7.2% since 1990, an average of 0.3% a year. The purpose of this study is to know whether the students are depressed and anxious during exam times and if so, in what grade of depression and anxiety the majority of students comes under .And with the results, to make general awareness and pacify the school student regarding their exams. Materials and Methods:  A cross sectional study will be conducted among the school students studying 9th and 10th standard in the field practice areas of the Department of Community Medicine Pondicherry institute of Medical Sciences, Duration of the study is one month (February 2017). Considering the prevalence of Anxiety and Depression as 25%, with 20% absolute precision the sample size calculated was 312. Results: Most of the 9th and 10th standard students are having mild depression, ie 119 students (n) which constitutes about 38.1%. Also on comparing 9th and 10th standard students, 9th standard students are having minimal depression ie 65 students which constitutes about 60.2 %, whereas 10th standard students are having mild depression ie 70 students which constitutes about 51.8%.. Providing counselling for students, the teacher of a class should know the different difficulties of each student of their class and try to solve them in a smooth manner by doing these activities we can reduce the percentage of depression and anxiety among school children’s for an extent

Resolving the decades-long transient FIRST J141918.9+394036: an orphan long gamma-ray burst or a young magnetar nebula?

Ofek (2017) identified FIRST J141918.9+394036 (hereafter FIRST J1419+3940) as a radio source sharing similar properties and host galaxy type to the compact, persistent radio source associated with the first known repeating fast radio burst, FRB 121102. Law et al. (2018) showed that FIRST J1419+3940 is a transient source decaying in brightness over the last few decades. One possible interpretation is that FIRST J1419+3940 is a nearby analogue to FRB 121102 and that the radio emission represents a young magnetar nebula (as several scenarios assume for FRB 121102). Another interpretation is that FIRST J1419+3940 is the afterglow of an `orphan' long gamma-ray burst (GRB). The environment is similar to where most such events are produced. To distinguish between these hypotheses, we conducted radio observations using the European VLBI Network at 1.6 GHz to spatially resolve the emission and to search for millisecond-duration radio bursts. We detect FIRST J1419+3940 as a compact radio source with a flux density of $620 \pm 20\ \mathrm{\mu Jy}$ (on 2018 September 18) and a source size of $3.9 \pm 0.7\ \mathrm{mas}$ (i.e. $1.6 \pm 0.3\ \mathrm{pc}$ given the angular diameter distance of $83\ \mathrm{Mpc}$). These results confirm that the radio emission is non-thermal and imply an average expansion velocity of $(0.10 \pm 0.02)c$. Contemporaneous high-time-resolution observations using the 100-m Effelsberg telescope detected no millisecond-duration bursts of astrophysical origin. The source properties and lack of short-duration bursts are consistent with a GRB jet expansion, whereas they disfavor a magnetar birth nebula.Comment: 8 pages, 4 figures, accepted for publication in ApJ