925 research outputs found
Elliptic curves with some applications to cryptography - by Samar Jaafar Jaafar
No full textThesis (M.S.)--Dept. of Mathematics and Computer Science, AUB, 2003.;"Advisor: Kamal Khuri-Makdisi, Assistant Professor, Mathematics.--Member of Committee: Wadi? Jureidini, Associate Professor, Mathematics.--Member of Committee: Nazih Nahlus, Professor, MBibliography : leaves 74-75.Elliptic curves are the simplest example of non-tri vial curves. They have--continuously been at the center stage of mathematical research for centuries. Elliptic--curves are a subject where diverse branches o f mathematics come together: Complex--anal
(Cantor 1849)
No full textFigure 7. Line drawings of the jaw and jaw suspensorium of (A) Oxuderces nexipinnis (USNM 279359) and (B) Gnatholepis sp. (USNM 287166). Angle between metapterygoid–symplectic–quadrate strut and anguloarticular is acute in O. nexipinnis, in which the preopercle is relatively thin and subcrescent-shaped. In contrast, the angle between the strut and the anguloarticular is obtuse, and the preopercle is wider and broadly crescent-shaped in Gnatholepis sp. Bone is stippled, cartilage is represented by open circles.Published as part of Jaafar, Zeehan & Parenti, Lynne R., 2017, Systematics of the mudskipper genus Oxuderces Eydoux & Souleyet 1848 (Teleostei: Gobiidae: Oxudercinae) with resurrection from synonymy of O. nexipinnis (Cantor 1849), pp. 195-215 in Zoological Journal of the Linnean Society 180 (5) on page 204, DOI: 10.1111/zoj.12482, http://zenodo.org/record/571094
Law Library Consortium in Metro Manila
No full textThis chapter gives an overview of special libraries, the management of special libraries, law libraries, and their management and administration. It discusses how the five managerial functions are exercised in law libraries in the Philippines based on the data in the study of the author. It also illustrates the need of the law libraries to collaborate, and discusses the model of a law library consortium proposed by Jaafar (2012). The views of the administrators of the parent institutions of the participant law libraries on their libraries and the propose consortium (based on the said study) are also discussed. At the end of the chapter, some of the recommendations in the aforementioned study were adopted and updated based on the emerging trends and other references for further studies. </jats:p
Feasibility of groundwater recharge dam projects in arid environments
No full textA new method for determining feasibility and prioritizing investments for agricultural and domestic recharge dams in arid regions is developed and presented. The method is based on identifying the factors affecting the decision making process and evaluating these factors, followed by determining the indices in a GIS-aided environment. Evaluated parameters include results from field surveys and site visits, land cover and soils data, precipitation data, runoff data and modeling, number of beneficiaries, domestic irrigation demand, reservoir objectives, demography, reservoirs yield and reliability, dam structures, construction costs, and operation and maintenance costs. Results of a case study on more than eighty proposed dams indicate that assessment of reliability, annualized cost-demand satisfied and yield is crucial prior to investment decision making in arid areas. Irrigation demand is the major influencing parameter on yield and reliability of recharge dams, even when only 3. months of the demand were included. Reliability of the proposed reservoirs as related to their standardized size and net inflow was found to increase with increasing yield. High priority dams were less than 4percent of the total, and less priority dams amounted to 23percent, with the remaining found to be not feasible. The results of this methodology and its application has proved effective in guiding stakeholders for defining most favorable sites for preliminary and detailed design studies and commissioning. © 2014.Adiat KAN, 2013, PURE APPL GEOPHYS, V170, P453, DOI 10.1007-s00024-012-0501-9; ALMUTTAIR FF, 1994, J WATER RES PL-ASCE, V120, P749, DOI 10.1061-(ASCE)0733-9496(1994)120:6(749); Al-Qurashi A, 2008, J HYDROL, V355, P91, DOI 10.1016-j.jhydrol.2008.03.022; Al-Turbak Abdulaziz S., 1989, INT J WATER RESOUR D, V5, P119, DOI 10.1080-07900628908722423; Andersen GR, 2001, J GEOTECH GEOENVIRON, V127, P335, DOI 10.1061-(ASCE)1090-0241(2001)127:4(335); Bartholome E, 2005, INT J REMOTE SENS, V26, P1959, DOI 10.1080-01431160412331291297; Chouinard L., 1996, J INFRASTRUCT SYST, DOI 10. 1061-(ASCE) 1076-0342(1996) 2: 1(23), 23-29; Department of Land Management, 1985, GEN SOIL MAP SAUD AR; Directorate of Projects Implementation, 2006, DAMS SAUD AR; Haimerl G., 2004, GROUNDWATER RECHARGE; Hydrology Division, 1983, HYDR PUBL, V98; Jarvis A, 2008, HOLE FILLED SEAMLESS; Koustoyiannis D., 2004, ENCY WATER; Lange J, 1999, WATER RESOUR RES, V35, P2161, DOI 10.1029-1999WR900038; Maidment D.R., 2002, ARC HYDRO GIS WATER; McIntyre N, 2009, ENVIRON MODELL SOFTW, V24, P726, DOI 10.1016-j.envsoft.2008.11.001; MICHAUD J, 1994, WATER RESOUR RES, V30, P593, DOI 10.1029-93WR03218; NASA, 2008, UMD LANDC CLASS; Natural Resources Conservation Service, 1997, NAT ENG HDB 630; PEGRAM GGS, 1980, J HYDROL, V47, P269, DOI 10.1016-0022-1694(80)90097-9; PILGRIM DH, 1988, HYDROLOG SCI J, V33, P379, DOI 10.1080-02626668809491261; Rijsberman FR, 2006, AGR WATER MANAGE, V80, P5, DOI 10.1016-j.agwat.2005.07.001; Saudi Geological Survey, 2008, HOW TO ORD; Shovic H.F., 2010, WATERSHED MANAGEMENT, P1094; Tizro A.T., 2007, J APPL SCI, V7; UNEP, 1997, WORLD ATLAS DESERTIF; U.S. Weather Bureau, 1958, TP 29 RAINF INT FREQ; Zakhem Boulos Abou, 2012, Hydrological Processes, V26, DOI 10.1002-hyp.84460
Bowl Inversion of Surface-Adsorbed Sumanene
No full textBowl-shaped π-conjugated compounds offer the possibility to study curvature-dependent host–guest interactions and chemical reactivity in ideal model systems. For surface-adsorbed π bowls, however, only conformations with the bowl opening pointing away from the surface have been observed so far. Here we show for sumanene on Ag(111) that both bowl-up and bowl-down conformations can be stabilized. Analysis of the molecular layer as a function of coverage reveals an unprecedented structural phase transition involving a bowl inversion of one-third of the molecules. On the basis of scanning tunneling microscopy (STM) and complementary atomistic simulations, we develop a model that describes the observed phase transition in terms of a subtle interplay between inversion-dependent adsorption energies and intermolecular interactions. In addition, we explore the coexisting bowl-up and -down conformations with respect to host–guest binding of methane. STM reveals a clear energetic preference for methane binding to the concave face of sumanene
Obliquogobius fluvostriatus Chen & Jaafar & Shao 2012, n. sp.
No full text<i>Obliquogobius fluvostriatus</i> n. sp. <p>(Figs. 1, 2)</p> <p> <b>Material examined.</b> Holotype, NSMT-P102090, 24.3 mm SL, male, Dredge Station No. 79; Kumejima, Ryukyu Islands, Japan, 26°14.686ʹN, 126°49.623ʹE, 141–165 m depth, Tabata (triangular dredge); 11 Nov. 2009; coll. Y.C. Liao <i>et al</i>.</p> <p> <b>Diagnosis.</b> <i>Obliquogobius fluvostriatus</i> <b>n. sp.</b> is distinguished from other congeners by the following combination of features: D2 rays I/9; A rays I/10; P rays 21; VC 26; LR 22; TR 7; belly scaled; isthmus, P base, cheek, predorsal region and operculum naked; gill opening very wide, extending forward of the vertical through rear margin of pupil; and specific life colouration as head with vertically infraorbital yellow band; one wide longitudinal yellow band from operculum terminating at posterior end of caudal fin, band increasingly wider, such that posterior half of body completely yellow.</p> <p> <b>Description.</b> Body proportions listed in Table 1. Body elongate, compressed. Head large (30.1% SL), compressed; snout profile slightly pointed and blunt, snout rather short. Eyes large, dorsal margin prominent; bony interorbital width narrow. Mouth oblique, forms a 45–50° angle to the horizontal, lower jaw terminates at a vertical of through anterior margin of the pupil. Lower jaw prominent; upper and lower jaws with 3–4 rows of conical teeth; outermost row of teeth irregularly arranged; 11–12 teeth on each side of upper jaw approximately four times larger than the rest; vomerine teeth absent; tongue truncate, weakly notched mid-tongue. Anterior naris a short tube, posterior naris as large hole. Gill opening very wide, extends anteroventrally through the rear margin of eye. VC 10 + 16 = 26. Dorsal pterygiophore formula 3/221101/9.</p> <p>Fins. D1 rays VI; D2 rays I/9; A rays I/10; P rays 21(left); V rays I/5+I/5; C segmented rays 17; C branched rays 13. D1 rays reaching D2 origin when adpressed; D2 rays shorter, not reaching segmented C rays when adpressed. P elliptical and long, rear tip extending posterior to vertical of A origin; A origin inserted into vertical of second element of D2; V rounded and moderately long, reaching genital papillae when adpressed, frenum absent, two sides of V joined together by concave, low connecting membrane, all soft rays of V splits into three branches twice. C asymmetrical with upper half of rays more protruded than those of lower half.</p> <p>Scales. LS 22; TR 7; PreD 0. Scales on body ctenoid posteriorly and cycloid anteriorly. Belly scaled; isthmus, pectoral fin base, cheek and operculum naked. Middle extension of predorsal region entirely naked. Anterolateral extension of scales on head to above terminal pore ρ of anterior oculoscapular canal, anterodorsal portion of nape partially abraded.</p> <p>Head lateral-line system. Canals: Oculoscapular canal present: anterior terminal paired pores σ, single interorbital pore λ, single pore κ, paired pores ω, paired postorbital pore α and lateral terminal pore ρ; preopercular canal with three pores as γ, δ and ε.</p> <p> Sensory papillae: Infraorbital papillae pattern longitudinal: row <i>a</i> short and not reaching vertical midline of eye; row <i>b</i> very short, along the lower margin of orbit, row <i>c</i> extending beyond vertical midline of orbit, row <i>d</i> with densely set papillae, row <i>cp</i> as single papilla, row <i>f</i> as paired papillae.</p> <p>Colouration in fresh preservative and markings. The following description is based on a photograph taken of a fresh specimen prior to preservation (Fig. 1). Ground colour beige to light gray; infraorbital yellow band about a half of pupil diameter in width, band originating below eye and coursing ventrally and terminates at rear margin of lower jaw, band does not persist in preservative; inverted-triangular grayish black mark obscured under yellow band when live; when preserved, only an inverted-triangular gray mark remains, the broad end originates below eye and the apex terminates at the posterior end of the lower jaw; mark made up of closely-set melanophores; region of snout anterior to aforementioned black mark beige and devoid of melanophores; anterior tips of upper and lower lips light pink; one wide longitudinal yellow band originating at the posterior end of the operculum and courses along mid-flank, terminating at posterior end of caudal fin, band about one pupil width, band increasingly widens such that posterior half of body is uniformly yellow; band immediately decreases in width at the origin of caudal fin, covering only lower two-thirds of C region; upper third of C dusky, due to random small black spots on fin membrane; yellow longitudinal band does not persist in preservative; lower two-third of C hyaline in preservative; D1 slightly damaged but some melanophores observed distally; D2 hyaline with thin longitudinal yellow stripe at base, stripe does not persist in long preservative; P, V and A hyaline.</p> <p> <b>Distribution.</b> This species is only known from Kumejima, Ryukyu Islands, Japan.</p> <p> <b>Etymology.</b> The specific name, <i>fulvostriatus</i>, is derived from the longitudinal yellow band (in Latin: “ <i>fulvo</i> + <i>striata</i> ”) on the trunk, a conspicuous character in the fresh specimen.</p> <p> <b>Remarks.</b> <i>Obliquogobius fulvostriatus</i> <b>n. sp.</b> and <i>O</i>. <i>megalops</i> Shibukawa & Aonuma, 2007, have wide gill openings and a low connecting membrane between the pelvic fins versus narrower gill openings and the pelvic fins completely united in congeners. However, <i>O. fulvostriatus</i> <b>n. sp.</b> can be differentiated from <i>O. megalops</i> by these characters: D2 rays I/9, A rays I/10, P rays 21 (vs. D2 rays I/8, A rays I/9, P rays 23); black T-shaped mark absent from C base (vs. present); and dark markings absent from the body in the preserved specimen (vs. 5 narrow vertical black bars in preserved specimens).</p>Published as part of <i>Chen, I-Shiung, Jaafar, Zeehan & Shao, Kwang-Tsao, 2012, A new Obliquogobius (Teleostei: Gobiidae) from Kumejima, Ryukyu Islands, Japan, pp. 269-273 in Zootaxa 3367 (1)</i> on pages 270-272, DOI: 10.11646/zootaxa.3367.1.25, <a href="http://zenodo.org/record/5252180">http://zenodo.org/record/5252180</a>
Penggunaan tasybih dan isti'arah dalam cerpen Arab dan Melayu : satu perbandingan / Nurul Ashiqin binti Jaafar
No full textThis dissertation entitled "Comparison Tasybih and Isti‘arah in Arabic and Malay Stories", discuss about comparison study between Arabic and Malay stories. The aim of this research is to introduce of the styles of tasybih and isti‘arah (style of comparative language) in Arab and Malay short stories. Tasybih and isti‘arah is a form of Arab rhetoric that led to the study and teaching of effective communication through the use of proper language style according to language experts. It not only describes the structure of a brief, but included definitions and examples as well as comparisons between tasybih and isti‘arah in Arabic and Malay. This dissertation study compares the language metaphor in Arabic and Malay short stories by two eminent authors of Naguib Mahfouz and Anwar Ridhwan. The aim of the study aspect of language styles in Arabic and Malay as well as examine the similarities and differences.
In addition, two authors sustainably equity selection from Egypt and Malaysia is based on achievement, strengths and tendencies in their respective fields of writing prose, especially short stories. Both materials also never made a comparative study or analysis of text-Arabic Malay researchers earlier. For Naguib Mahfouz, in his selected short stories entitled Nisf Yaum (Separuh Hari) and Al-Hawi Khatafa at-Tabaq (Tukang Silap Mata Melarikan Pingganku). Meanwhile, Anwar Ridhwan, in his selected short story entitled “Perjalanan Terakhir”. The main finding of this study is the style of language used by Naguib Mahfouz in his works mostly direct the view to use tasybih and isti‘arah in a parable in his short stories and the style of language used by Anwar Ridhwan in his writing more overlap or are indirect. At the end, the author will discuss the conclusion of the study, and some suggestions that are considered should be brought to attention of certain parties. Hopefully, this study will bring benefits to all
Genetic diversity analysis and DNA fingerprinting of tomato breeding lines using SSR markers
No full textSaabunud / Received 01.04.2021 ; Aktsepteeritud / Accepted 04.06.2021 ; Avaldatud veebis / Published online 04.06.2021 ; Vastutav autor / Corresponding author: Ghassan Jaafar Hamd [email protected] is a need to expand the information on genetic
relationships between tomato (Solanum lycopersicum L.) lines to improve
hybridization breeding. The genetic diversity and relationships among 24
tomato lines were evaluated by simple sequence repeat (SSR) markers. A
total of 65 bands were generated with 15 SSR primers, of which 64 bands
were polymorphic. The mean polymorphic information content was 0.356.
There was a high degree of polymorphism between tomato cultivars. The
mean marker index and heterozygosity were 0.045 and 0.454, respectively.
Cluster analysis grouped cultivars into 6 main clusters. The cvs. Mo. H. P,
'C. C. Orange', and 'Marb' had the greatest genetic distance from other
cultivars and is suitable for hybridization to achieve maximum variability
for selection in segregating populations. The data can be used to select
appropriate parents in tomato hybridization breeding
Synthesis and characterization of self-cleaning hydrophobic organic coating / Amirul Syafiq Abdul Jaafar
No full textThree self-cleaning coating systems namely Polydimethylsiloxane (PDMS)/Sylgard, PDMS/3-Aminopropyltriethoxysilane (APTES) (tagged as A1) and A1 blended with nano-Calcium Carbonate (CaCO3) have been synthesised on glass substrates via dip-coating and spray-coating techniques. All of the prepared coatings were dried under ambient condition before being subjected to characterisations and testing(s). The effect of various weight percentages of Sylgard resin that are 5wt.% (S1 coating), 10wt.% (S2 coating), 15wt.% (S3 coating), and 20 wt.% (S4 coating) on the hydrophobicity, self-cleaning property, anti-fog performance and mechanical property of PDMS/Sylgard coating have been discussed in the first section of this thesis. The PDMS/Sylgard coated glass substrates exhibit transmittance above 94% in UV-Vis region, indicating high transparency. From the micro-scratch and micro-hardness tests, it was observed that the PDMS/Sylgard coating possess of stronger adhesion to glass substrate as the Sylgard concentration increased suggesting that the surface became stiffer with greater Sylgard concentration in PDMS matrix. The Water Contact Angle (WCA) showed that hydrophobicity of PDMS/Sylgard coated glass increased with increasing weight percentage of Sylgard up to 10 wt. %. When the weight percentage was above 15 wt. %, the WCA started to decrease due to saturated Si-O-Si crosslinking. In addition, the S2 coating showed an excellent anti-fog performance and great self-cleaning behavior where its transparency was above 64% after exposed to outdoor environment for 4 months. Thereafter, the best composition of S2 resin (10 wt.% Sylgard) was blended with the APTES ( A1 matrix) and different weight ratios of nano-Calcium Carbonate (CaCO3) that are 0.2wt.% (C1 coating), 0.4wt.% (C2 coating), 0.6wt.% (C3 coating), 0.8wt.% (C4 coating), 1.0wt.% (C5 coating) and 1.2wt.% (C6 coating) that have been discussed in the second section of this work. Both A1 coating and A1 blended with nano-CaCO3 coating systems exhibit high transmission above 83% in UV-VIS region. The consolidation of nano-CaCO3 in A1 matrix significantly improved the WCA of coating system since embedded nano-CaCO3 intensifies A1 surface roughness. The hydrophobicity of A1 blended with nano-CaCO3 coating systems increases with increasing of wt. % of nano-CaCO3 up to 0.8 wt. %. As the weight percentages was increased above 0.8wt%, WCA of A1/nano-CaCO3 coating system reduces to lower value due to agglomerations of nanoparticles at high nano-CaCO3 loading rates. The A1 blended with nano-CaCO3 coating systems exhibit stronger adhesion to glass substrate as weight percentages of nano-CaCO3 increased up to 0.8 wt.%. However, the A1 blended with nano-CaCO3 coating systems displayed weaker adhesion at high loading rates of nano-CaCO3 mainly above 0.8wt.% because higher loading rates of nanoparticles in A1 matrix lead to more crystalline surface and more crystalline surface make the surface become more brittle. Due to high hydrophobicity, the C4 coating exhibit the best anti-fog performance and achieves great self-cleaning effect among A1 blended with nano-CaCO3 coating systems under outdoor environment where its transparency was above 74% after exposed to outdoor environment for 4 months. Overall, all three coating systems retained their hydrophobicity after prolonged outdoor environment, revealed that prepared coatings systems have strong durability against rainfall impact.
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