1,032 research outputs found
Aplikasi Kidswall sebagai Media JejaringSosial Bagi Anak-Anak
Social network is one way in which we interact in cyberspace. As a social forum, social networks are often too general and likely to be abused by users. Crime, rudeness, sexual immorality, often became negative spotlight especially for parents who have little children. The parents hope social network can make interaction with each other calmly but still controlled. Based on this reason, the parents need a solution. The solution is implemented of social networking site that specifically for little children called Kidswall. This website is developed in PHP programming language and JQuery Ajax in the client side, that has features like user controlling, education development in a relational database, and also user can make interaction with the others. In blackbox testing has been done, it can be concluded that the process of user settings, education development, and interaction among the users become organized
Constraining the Dark Matter decay lifetime with very deep observations of the Perseus cluster with the MAGIC telescopes
We present preliminary results on Dark Matter searches from observations of
the Perseus galaxy cluster with the MAGIC Telescopes. MAGIC is a system of two
Imaging Atmospheric Cherenkov Telescopes located in the Canary island of La
Palma, Spain. Galaxy clusters are the largest known gravitationally bound
structures in the Universe, with masses of ~10^15 Solar masses. There is strong
evidence that galaxy clusters are Dark Matter dominated objects, and therefore
promising targets for Dark Matter searches, particularly for decay signals.
MAGIC has taken almost 300 hours of data on the Perseus Cluster between 2009
and 2015, the deepest observational campaign on any galaxy cluster performed so
far in the very high energy range of the electromagnetic spectrum. We analyze
here a small sample of this data and search for signs of dark matter in the
mass range between 100 GeV and 20 TeV. We apply a likelihood analysis optimized
for the spectral and morphological features expected in the dark matter decay
signals. This is the first time that a dedicated Dark Matter optimization is
applied in a MAGIC analysis, taking into account the inferred Dark Matter
distribution of the source. The results with the full dataset analysis will be
published soon by the MAGIC Collaboration
LATTES: a novel detector concept for a gamma-ray experiment in the Southern hemisphere
The Large Array Telescope for Tracking Energetic Sources (LATTES), is a novel
concept for an array of hybrid EAS array detectors, composed of a Resistive
Plate Counter array coupled to a Water Cherenkov Detector, planned to cover
gamma rays from less than 100 GeV up to 100 TeVs. This experiment, to be
installed at high altitude in South America, could cover the existing gap in
sensitivity between satellite and ground arrays.
The low energy threshold, large duty cycle and wide field of view of LATTES
makes it a powerful tool to detect transient phenomena and perform long term
observations of variable sources. Moreover, given its characteristics, it would
be fully complementary to the planned Cherenkov Telescope Array (CTA) as it
would be able to issue alerts.
In this talk, a description of its main features and capabilities, as well as
results on its expected performance, and sensitivity, will be presented.Comment: Proceedings of the 35th International Cosmic Ray Conference
(ICRC2017), Busan, South Korea. Presented by R. Concei\c{c}\~{a}o. 8 pages;
v2: correct affiliation + journal referenc
The impact of integrating food supplementation, nutritional education and HAART (Highly Active Antiretroviral Therapy) on the nutritional status of patients living with HIV/AIDS in Mozambique: result from the DREAM programme
DREAM (Drug Resources Enhancement against AIDS and Malnutrition) is
a multiregional health program active in Mozambique since 2002 and provides free of charge an integrating package of care consisting of peer to peer nutritional and health education,
food supplementation, voluntary counseling and testing, immunological, virological, clinical
assessment and HAART (Highly Active AntiRetroviral Treatment). The main goals of this
paper are to describe the state of health and nutrition and the adequacy of the diet of a
sample of HIV/AIDS patients in Mozambique on HAART and not.
A single-arm retrospective cohort study was conducted. 106 HIV/AIDS adult patients (84 in
HAART), all receiving food supplementation and peer-to-peer nutritional education, were
randomly recruited in Mozambique in two public health centres where DREAM is running.
The programme is characterized by: provision of HAART, clinical and laboratory monitoring,
peer to peer health and nutritional education and food supplementation. We measured
BMI, haemoglobin, viral load, CD4 count at baseline (T0) and after at least 1 year (T1).
Dietary intake was estimated using 24h food recall and dietary diversity was assessed by
using the Dietary Diversity Score (DDS) at T1.
Overall, the patients'diet appeared to be quite balanced in nutrients. In the cohort not in
HAART the mean BMI values showed an increases but not significant (initial value: 21.9±2.9;
final value: 22.5±3.3 ) and the mean haemoglobin values (g/dl) showed a significant increases
(initial value: 10.5+ 2.1; final value: 11.5±1.7 p< 0.024) . In the cohort in HAART, both the
mean of BMI value (initial value: 20.7±3.9; final value: 21.9±3.3 p< 0.001) and of haemoglobin
(initial value: 9.9±2.2; final value: 10.8±1.7 p< 0.001) showed a higher significant increase.
The increase in BMI was statistically associated with the DDS in HAART patients.
In conclusion nutritional status improvement was observed in both cohorts. The improvement
in BMI was significant and substantially higher in HAART patients because of the impact
of HAART on nutritional status of AIDS patients. Subjects on HAART and with a DDS >
5, showed a substantial BMI gain. This association showed an additional expression of the
synergic effect of integrating food supplementation, nutritional education and HAART on
the nutritional status of African AIDS patients and also highlights the complementary role
of an adequate and diversified diet in persons living with HIV/AIDS in resources limited
settings
Prospects for the Observation of Primordial Black Hole evaporation with the Southern Wide Field of View Gamma-ray Observatory
Primordial Black Holes (PBHs) are remnants of objects formed in the early
Universe. Their lifetime is an increasing function of their mass, so PBHs in
the right mass range can end their lives in an evaporation event that is
potentially detectable by our instruments now. This evaporation may result in a
-ray flash that can be detected by the current generation of
Very-High-Energy -ray detectors. The Southern Wide field of view
Gamma-ray Observatory (SWGO) will be part of the next generation of these
instruments. It will be able to establish limits on PBH evaporations for
integration windows between 0.5 and 5 s, in a radius of 0.25 pc around the
Earth, being sensitive to a rate of the order of 50 pc yr,
more than one order of magnitude more constraining than the currently
established best limits.Comment: Accepted by JCA
LATTES: A new gamma-ray detector concept for South America
Currently the detection of Very High Energy gamma-rays for astrophysics rely on the measurement of the Extensive Air Showers (EAS) either using Cherenkov detectors or EAS arrays with larger field of views but also larger energy thresholds. In this talk we present a novel hybrid detector concept for a EAS array with an improved sensitivity in the lower energies (~ 100 GeV). We discuss its main features, capabilities and present preliminary results on its expected perfomances and sensitivities.This wide field of view experiment is planned to be installed at high altitude in South America making it a complementary project to the planned Cherenkov telescope experiments and a powerful tool to trigger further observations of variable sources and to detect transients phenomena
Sustainable Soil and Water Resources Management in Nigeria: The Need for a Data-Driven Policy Approach
E�ective public policies are needed to manage a nation’s natural resources, including soil
and water. However, making such policies currently requires a shift from a traditional qualitative
approach to a mix of scientific data, evidence and the relevant social elements, termed data-driven
policymaking. Nigeria, like most developing countries, falls short of the framework for this approach.
Nevertheless, the lack of potable water in some regions and the continuous degradation of farmable
lands call for intervention through e�ective policy formulation and implementation. In this work,
we present a conceptual workflow as a strategic step towards developing a framework for a data-driven
soil and water resources management policy. A review of the current legal and policy framework
and selected scientific literature on soil and water resources in Nigeria is presented. Analysis of the
National Water Resources Bill proposed in 2018 is used to highlight existing gaps between policy,
scientific data and reality. Modern field techniques and project-based examples for soil and aquifer
characterization that can be adapted for local use are presented. While government must take
responsibility for the poor policy framework, the research community is challenged on the need for
scientific data as a base for e�ective policy formulation and implementation
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