148 research outputs found
Correlation between mount wilson classifications to solar flares using solar dynamics observatory (SDO) and hinode satellites / N.A.M. Norsham, Z.S. Hamidi and N.N.M. Shariff
No full textSpace weather disruption is known to be caused by solar flares and coronal mass ejections, which is the motivation for this study. The Mount Wilson classification, or magnetic classification, is used to study sunspots or active regions (AR). Three active regions were analysed in this study to examine their correlation with flare production. We use statistical and observational analysis to identify our objective. Data used was from 2014 to 2019 and the associated ARs are AR 11967, AR 12403, and AR 12192. Further analysis was carried out on each of them using the white light, magnetogram, and AIA 1700 filter from Solar Dynamics Observatory (SDO,) NOAA (National Oceanic and Atmospheric Administration), Hinode, and Space Weather Live. According to this study, solar flares are associated with high magnetic flux density and the number and size of sunspots. There have been rearrangements and changes in the topology and energy of the magnetic field that resulted in a flare
Physiology of integumentary system: Integration from Islamic perspective
No full textHuman body is one of the most complex creatures which has been mentioned in many divine and modern sources. The skin, or integumentary system is the set of organs forming the outermost layer of human’s body. The scientific research has been progresses tremendously in this area however, there is insufficiency review and description from Islamic perspective. Thus, this paper aims to synthesise available literature on integumentary sciences and relate with Islamic perspective. The roles of integumentary system in fingerprints identification, variation of skin colour, regeneration and replacement of skin in hell fire are explained from the Islamic perspective based on relevant Qur’anic verses and/or the hadith. It is hoped that by viewing and relating Islamic perspective and scientific knowledge it will become a single source of hidayah, the source of truth for this world and the hereafter
Preparedness plan for flood: a bottom up approach
No full textFloods have caused major disasters around the world and these include Malaysia which is inevitable. However, we can be prepared by taking the lessons from the previous flood disasters. This paper attempts to highlight preparedness plan executed by the community i.e. six months before the expected flood in December 2015. Preparedness plan can be initiated during rehabilitation process at every level in the affected community by the community themselves-bottom up approach. It can be done through Community-based Disaster Risk Management (CBDRM) and intensive mutual assistance. The preparedness plan does not mean the community does not need help from the authority, but it is an integral effort. Hopefully, this bottom up approach will fill the gap between the community and the authority.Keywords: preparedness plan; flood; disaster; Malaysia; CBDR
Marangoni driven free surface flows in liquid weld pools
No full textExtending the weldability of novel materials, and improving the weld quality by tailoring weld microstructures are key factors to obtain the welding techniques demanded in the modern manufacturing industries. This can be done, for example, by feeding chemical elements from a consumable wire into the weld pool during welding. The mixing of chemical components in the weld pool and the resulting post-solidification weld microstructures are influenced by weld pool hydrodynamics. Weld pool hydrodynamics is known to be primarily driven by Marangoni forces acting at the free liquid surface, i.e by tangential gradients in surface tension along the liquid surface due to pronounced lateral gradients in temperature and surface active element concentration. In this research, we develop a Computational Fluid Dynamics model to study steel weld pool hydrodynamics during conduction mode laser spot welding. It is concluded that free surface deformations and instabilities have a strong impact on the fluid flow and heat transfer in weld pools, and should therefore be accounted for in weld pool simulations. With increasing the surface active element concentration and laser power, the weld pool flow becomes highly unstable and can no longer be accurately modeled with a flat surface assumption. More accurate predictions of weld pool physics can be made if the free surface, solidification stage, and three-dimensionality are taken into account. This reduces the need for the use of unphysical parameter fittings widely reported in literature.Multi Scale PhysicsApplied Science
Studies on chemically induced physio-morphological changes in a water mold, Allomyces macrogynus, 1969
No full textA study of the in vitro effects such chemicals as adenine, aureomycin, benzyl adenine, niacin and sodium barbital have on morphogenetic patterns in the water mold Allomyces macrogynus, has been conducted. Cultures of A.macrogynus have been grown on one-fourth strength Emerson's YpSs agar supplemented with each chemical. A nonsupplemented one-fourth strength YpSs agar served as the control. All cultures were grown under normal laboratory temperature and light conditions for a three-week period. Microscopic observations were made at the end of 7, 15 and 21 days to determine the extent of morphogenetic variations induced by the chemicals. At concentrations of 38/ml adenine and 38/ml benzyl adenine a higher percentage of male gametangia formed on gametothalli. Concentrations of 0.1 mg/ml benzyl adenine were found to induce a higher percentage of Z.S. to R.S. on sporothalli, whereas 98/ml of barbital sodium caused an increase in the number of gametangia forming on gamethothalli. Concentrations of 38/ml of benzyl adenine and 91/ml of barbital sodium were found to induce a higher percentage of R.S. on gametothalli. Concentrations of 91/ml of barbital sodium and 48/ml of aureomycin were found to induce "hyphal" protuberations from Z.S., whereas a concentration of 2S8/ml of barbital sodium induced "hyphal" protuberations from gametangia as well as sporangia. Concentrations of 18/ml and 48/ml of niacin were found to induce spore germination within Z.S. Cytochemically the presence of protein and nucleic acids was detected. It was concluded in light of these observations that the five organic chemicals used in this investigation exhibited distinct morphogenetic inductive principles which alter the regulatory mechanism in Allomyces macrogynus
High Time Resolution Observation of Solar Radio of A Group Type III And U Burst Associated of Solar Flares Event
No full textThe results of high time resolution of solar flare type III and U burst at National Space Centre, Sg Lang, Selangor, Malaysia have been reported. We selected data in the meter -
wave region solar radio spectral observations of the 2012 March 9th flare. During that period, a strong M 7.9 solar flare was recorded from solar Active Region 1429. It is clearly seen an inverted type occurs between 310 MHz till 384 MHz within 1 second. The group of type III burst also occurred before type U. During this period, M6 solar flare occurred in the active region AR 1429 starting at 03:32 UT and ending at 05:00 UT, with the peak at 04:12 UT. There is also a halo of Coronal Mass Ejections (CMEs) produced shortly after, and is expected to deliver a glancing blow t
o the earth’s magnetic field sometime March 16th. In conclusion, we believed that the behavior of type III should be critically understood in order to predict the formation of type U burst. This also approve that the CALLISTO system possible to detect a radio burst signal at
a precise time
Author response to: Cardiovascular risk factors in offspring exposed to gestational diabetes mellitus in utero: systematic review and meta-analysis
No full textLetter to the EditorThis commentary is an author response to Yu and colleagues regarding the manuscript entitled ‘Cardiovascular risk factors in offspring exposed to gestational diabetes mellitus in utero: Systematic review and meta-analysis’. We address their concern regarding minor errors in our manuscript, our search strategy and assessment of heterogeneity.Maleesa M. Pathirana, Zohra S. Lassi, Claire T. Roberts, and Prabha H. Andraweer
Approximate Personal Name-Matching Through Finite-State Graphs
No full textThis article shows how finite-state methods can be employed in a new and different task: the conflation of personal name variants in standard forms. In bibliographic databases and citation index systems, variant forms create problems of inaccuracy that affect information retrieval, the quality of information from databases, and the citation statistics used for the evaluation of scientists' work. A number of approximate string matching techniques have been developed to validate variant forms, based on similarity and equivalence relations. We classify the personal name variants as nonvalid and valid forms. In establishing an equivalence relation between valid variants and the standard form of its equivalence class, we defend the application of finite-state transducers. The process of variant identification requires the elaboration of: (a) binary matrices and (b) finite-state graphs. This procedure was tested on samples of author names from bibliographic records, selected from the Library and Information Science Abstracts (LISA) and Science Citation Index Expanded (SCI-E) databases. The evaluation involved calculating the measures of precision and recall, based on completeness and accuracy. The results demonstrate the usefulness of this approach, although it should be complemented with methods based on similarity relations for the recognition of spelling variants and misspellings
Engaging employees with their organisation's vision: Using visual storytelling through sketching
No full textThis paper explores the use of visual storytelling, for instance sketching, in organisational strategy practices. It contributes to an understanding of how design education has to change in order to broaden the skillset of design students, for them to be able to redesign organisations.Methodologie en Organisatie van DesignMarketing and Consumer Researc
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