[신기술 소개] 인위적으로 배출된 이산화탄소의 영구적 처리를 위한 신속한 탄소 광물화

( Matter Et Al. ) 한국화학공학회 2016 NICE Vol.34 No.4

Enhanced MPR Selection Strategy for Multicast OLSR

Matter, Safaa S.,Al Shaikhli, Imad F.,Hashim, Aisha H.A.,Ahmed, Abdelmoty M.,Khattab, Mahmoud M. International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.10

Wireless community networks (WCNs) are considered another form of ownership of internet protocol (IP) networks, where community members manage and own every piece of equipment in a decentralized way, and routing for traffic is done in a cooperative manner. However, the current routing protocols for WCNs suffer from stability and scalability issues. In this paper, an enhanced routing protocol is proposed based on the optimized link state routing (OLSR) protocol to meet the standards of efficiency in terms of stability and scalability. The proposed routing protocol is enhanced through two phases: multicasting expansion and multipoint relay (MPR) selection based on an analytical hierarchical process (AHP). The experimental results demonstrate that the proposed routing protocol outperforms the OLSR protocol in terms of network control overhead and packet delivery ratio by 18% and 1% respectively.

파이브필드

매터 디자인(Matter Design),FR,SCH 프로젝트(FR,SCH Projects),브랜든 클리포드(사진) 현대건축사 2017 마루 Vol.- No.183

파이브필드

매터 디자인(Matter Design),FR,SCH 프로젝트(FR,SCH Projects),브랜든 클리포드(사진) 현대건축사 2017 (월간)Maru Vol.- No.183

Effect of aggregation on shear and elongational flow properties of acrylic thickeners

Willenbacher, N.,Matter, Y.,Gubaydullin, I.,Schaedler, V. The Korean Society of Rheology 2008 Korea-Australia rheology journal Vol.20 No.3

The effect of intermolecular aggregation induced by hydrophobic and electrostatic interactions on shear and elongational flow properties of aqueous acrylic thickener solutions is discussed. Complex shear modulus is determined at frequencies up to $10^4$ rad/s employing oscillatory squeeze flow. Extensional flow behavior is characterized using Capillary Break-up Extensional Rheometry. Aqueous solutions of poly(acrylic acid)(PAA)/poly(vinylpyrrolidone-co-vinylimidazole) (PVP-VI) mixtures exhibit unusual rheological properties described here for the first time. Zero-shear viscosity of the mixtures increases with decreasing pH and can exceed that of the pure polymers in solution by more than two orders of magnitude. This is attributed to the formation of complexes induced by electrostatic interactions in the pH range, where both polymers are oppositely charged. PAA/PVP-VI mixtures are compared to the commercial thickener Sterocoll FD (BASF SE), which is a statistical co-polymer including (meth) acrylic acid and ethylacrylate (EA) forming aggregates in solution due to "sticky" contacts among hydrophobic EA-sequences. PAA/PVP-VI complexes are less compact and more deformable than the hydrophobic Sterocoll FD aggregates. Solutions of PAA/PVP-VI exhibit a higher zero-shear viscosity even at lower molecular weight of the aggregates, but are strongly shear-thinning in contrast to the weakly shear-thinning solutions of Sterocoll FD. The higher ratio of characteristic relaxation times in shear and elongation determined for PAA/PVP-VI compared to Sterocoll FD solutions reflects, that the charge-induced complexes provide a much stronger resistance to extensional flow than the aggregates formed by hydrophobic interactions. This is most likely due to a break-up of the latter in extensional flow, while there is no evidence for a break-up of complexes for PAA/PVP-VI mixtures. These flexible aggregates are more suitable for the stabilization of thin filaments in extensional flows.

Assessment of Some Barley Germplasms Based on RAPD Analysis and Anti-Nutritional Factors

Mohamed, Amal A.,Matter, Mohamed Ahmed,Rady, Mohamed Ramadan 한국작물학회 2010 Journal of crop science and biotechnology Vol.13 No.2

The variation among some barley germplasm (Giza 123, Giza 127, Giza 130, Desert, and Sinai) was investigated comparatively at the molecular and biochemical levels. Leaf DNAs extracted from different barley germplasm were amplified with randomly chosen primers in a Polymerase Chain Reaction (PCR) using Random Amplified Polymorphic DNA (RAPD) technique. Only five primers amplified all DNA templates among 15 primers. Primers generated a total of 112 DNA fragments ranged from 1.2 to 0.1 kbp. Out of the 112 fragments, 16 (14.29%) were polymorphic. The result indicated that fragments generated per primer, with an average of 22.4 products, where the number of polymorphic bands per primer, with an average of 3.2 polymorphic bands. In addition, the genetic variation in the anti-nutritional factors and nutrient composition of the same genotypes were determined. A wide variation in total phenolic, phytic, tannin, vicine, and saponin contents was found among these germplasm. The range of total phenolic was 3.83 to $7.50\;mg\;g^{-1}d.w$. Among all germplasm, Desert germplasm was characterized by the highest tannin content. However, saponin ranged between $5.66\;mg\;g^{-1}d.w$. (in Giza 123) to $9.21\;mg\;g^{-1}d.w$ (in Sinai) germplasm. The concentrations of the phytic acid were generally low, ranging between 0.99 to $6.78\;mg\;g^{-1}d.w$. The germplasm Desert and Sinai had the highest level of vicine, 1.89 and $1.87\;mg\;g^{-1}d.w$., respectively. The results of the molecular characterization and anti-nutritional content can be used as the starting point needed to identify the valuable Egyptian barley germplasm.

Effect of aggregation on shear and elongational flow properties of acrylic thickeners

N. Willenbacher,Y. Matter,I. Gubaydullin,V. Schaedler 한국유변학회 2008 Korea-Australia rheology journal Vol.20 No.3

The effect of intermolecular aggregation induced by hydrophobic and electrostatic interactions on shear and elongational flow properties of aqueous acrylic thickener solutions is discussed. Complex shear modulus is determined at frequencies up to 104 rad/s employing oscillatory squeeze flow. Extensional flow behavior is characterized using Capillary Break-up Extensional Rheometry. Aqueous solutions of poly(acrylic acid) (PAA)/poly(vinylpyrrolidone-co-vinylimidazole) (PVP-VI) mixtures exhibit unusual rheological properties described here for the first time. Zero-shear viscosity of the mixtures increases with decreasing pH and can exceed that of the pure polymers in solution by more than two orders of magnitude. This is attributed to the formation of complexes induced by electrostatic interactions in the pH range, where both polymers are oppositely charged. PAA/PVP-VI mixtures are compared to the commercial thickener Sterocoll FD (BASF SE), which is a statistical co-polymer including (meth) acrylic acid and ethylacrylate (EA) forming aggregates in solution due to “sticky” contacts among hydrophobic EA-sequences. PAA/PVP-VI complexes are less compact and more deformable than the hydrophobic Sterocoll FD aggregates. Solutions of PAA/PVPVI exhibit a higher zero-shear viscosity even at lower molecular weight of the aggregates, but are strongly shear-thinning in contrast to the weakly shear-thinning solutions of Sterocoll FD. The higher ratio of characteristic relaxation times in shear and elongation determined for PAA/PVP-VI compared to Sterocoll FD solutions reflects, that the charge-induced complexes provide a much stronger resistance to extensional flow than the aggregates formed by hydrophobic interactions. This is most likely due to a break-up of the latter in extensional flow, while there is no evidence for a break-up of complexes for PAA/PVP-VI mixtures. These flexible aggregates are more suitable for the stabilization of thin filaments in extensional flows

Classifications of Hadiths based on Supervised Learning Techniques

AbdElaal, Hammam M.,Bouallegue, Belgacem,Elshourbagy, Motasem,Matter, Safaa S.,AbdElghfar, Hany A.,Khattab, Mahmoud M.,Ahmed, Abdelmoty M. International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.11

This study aims to build a model is capable of classifying the categories of hadith, according to the reliability of hadith' narrators (sahih, hassan, da'if, maudu) and according to what was attributed to the Prophet Muhammad (saying, doing, describing, reporting ) using the supervised learning algorithms, with a view to discover a relationship between these classifications, based on the outputs of this model, which might be useful to avoid the controversy and useless debate on automatic classifications of hadith, using some of the statistical methods such as chi-square, information gain and association rules. The experimental results showed that there is a relation between these classifications, most of Sahih hadiths are belong to saying class, and most of maudu hadiths are belong to reporting class. Also the best classifier had given high accuracy was MultinomialNB, it achieved higher accuracy reached up to 0.9708 %, for his ability to process high dimensional problems and identifying the most important features that are relevant to target data in training stage. Followed by LinearSVC classifier, reached up to 0.9655, and finally, KNeighborsClassifier reached up to 0.9644.

Assessment of Some Barley Germplasms Based on RAPD Analysis and Anti-nutritional Factors

Amal A. Mohamed,Mohamed Ahmed Matter,Ramadan Rady 한국작물학회 2010 Journal of crop science and biotechnology Vol.13 No.2

The variation among some barley germplasm (Giza 123, Giza 127, Giza 130, Desert, and Sinai) was investigated comparatively at the molecular and biochemical levels. Leaf DNAs extracted from different barley germplasm were amplified with randomly chosen primers in a Polymerase Chain Reaction (PCR) using Random Amplified Polymorphic DNA (RAPD) technique. Only five primers amplified all DNA templates among 15 primers. Primers generated a total of 112 DNA fragments ranged from 1.2 to 0.1 kbp. Out of the 112 fragments, 16 (14.29%) were polymorphic. The result indicated that fragments generated per primer, with an average of 22.4products, where the number of polymorphic bands per primer, with an average of 3.2 polymorphic bands. In addition, the genetic variation in the anti-nutritional factors and nutrient composition of the same genotypes were determined. A wide variation in total phenolic, phytic, tannin, vicine, and saponin contents was found among these germplasm. The range of total phenolic was 3.83 to 7.50 mg g-¹ d.w. Among all germplasm, Desert germplasm was characterized by the highest tannin content. However, saponin ranged between 5.66 mg g-¹ d.w. (in Giza 123) to 9.21 mg g-¹ d.w (in Sinai) germplasm. The concentrations of the phytic acid were generally low, ranging between 0.99 to 6.78 mg g-¹ d.w. The germplasm Desert and Sinai had the highest level of vicine, 1.89 and 1.87 mg g-¹d.w., respectively. The results of the molecular characterization and anti-nutritional content can be used as the starting point needed to identify the valuable Egyptian barley germplasm.

Characterization and identification of lipid-producing microalgae species isolated from a freshwater lake

Abou-Shanab, R.A.I.,Matter, I.A.,Kim, S.N.,Oh, Y.K.,Choi, J.,Jeon, B.H. Pergamon ; Elsevier Science Ltd 2011 Biomass & bioenergy Vol.35 No.7

Microalgal lipids are the oils of the future for sustainable biodiesel production. One of the most important decisions in obtaining oil from microalgae is the choice of species. A total of 45 algal cultures were isolated from a freshwater lake at Wonju, South Korea. Five microalgal isolates were selected based on their morphology and ease of cultivation under our test conditions. These cultures were identified as strains of Scenedesmus obliquus YSL02, Chlamydomonas pitschmannii YSL03, Chlorella vulgaris YSL04, S. obliquus YSL05, and Chlamydomonas mexicana YSL07 based on microscopic examination and LSU rDNA (D1-D2) sequence analysis. S. obliquus YSL02 reached a higher biomass concentration (1.84 +/- 0.30 g L<SUP>-1</SUP>) with a lower lipid content (29% w/w), than did Chla. pitschmannii YSL03 (maximum biomass concentration of 1.04 +/- 0.09 with a 51% lipid content). Our results suggest that Chla. pitschmannii YSL03 is appropriate for producing biodiesel based on its high lipid content and oleic acid proportion.