• Title/Summary/Keyword: DES[2]

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The cultivation of wild food and medicinal plants for improving community livelihood: The case of the Buhozi site, DR Congo

  • Karhagomba, Innocent Balagizi;Adhama, Mirindi T.;Mushagalusa, Timothee B.;Nabino, Victor B.;Koh, Kwangoh;Kim, Hee Seon
    • Nutrition Research and Practice
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    • v.7 no.6
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    • pp.510-518
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    • 2013
  • This study aims to demonstrate the effect of farming technology on introducing medicinal plants (MP) and wild food plants (WFP) into a traditional agricultural system within peri-urban zones. Field investigations and semi-structured focus group interviews conducted in the Buhozi community showed that 27 health and nutrition problems dominated in the community, and could be treated with 86 domestic plant species. The selected domestic MP and WFP species were collected in the broad neighboring areas of the Buhozi site, and introduced to the experimental field of beans and maize crops in Buhozi. Among the 86 plants introduced, 37 species are confirmed as having both medicinal and nutritional properties, 47 species with medicinal, and 2 species with nutritional properties. The field is arranged in a way that living hedges made from Tithonia diversifolia provide bio-fertilizers to the plants growing along the hedges. The harvest of farming crops does not disturb the MP or WFP, and vice-versa. After harvesting the integrated plants, the community could gain about 40 times higher income, than from harvesting farming crops only. This kind of field may be used throughout the year, to provide both natural medicines and foods. It may therefore contribute to increasing small-scale crop producers' livelihood, while promoting biodiversity conservation. This model needs to be deeply documented, for further pharmaceutical and nutritional use.

Enzyme-Catalyzed Henry Reaction in Choline Chloride-Based Deep Eutectic Solvents

  • Tian, Xuemei;Zhang, Suoqin;Zheng, Liangyu
    • Journal of Microbiology and Biotechnology
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    • v.26 no.1
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    • pp.80-88
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    • 2016
  • The enzyme-catalyzed Henry reaction was realized using deep eutectic solvents (DESs) as a reaction medium. The lipase from Aspergillus niger (lipase AS) showed excellent catalytic activity toward the substrates aromatic aldehydes and nitromethane in choline chloride:glycerol at a molar ratio of 1:2. Addition of 30 vol% water to DES further improved the lipase activity and inhibited DES-catalyzed transformation. A final yield of 92.2% for the lipase AS-catalyzed Henry reaction was achieved under optimized reaction conditions in only 4 h. In addition, the lipase AS activity was improved by approximately 3-fold in a DES-water mixture compared with that in pure water, which produced a final yield of only 33.4%. Structural studies with fluorescence spectroscopy showed that the established strong hydrogen bonds between DES and water may be the main driving force that affects the spatial conformation of the enzyme, leading to a change in lipase activity. The methodology was also extended to the aza-Henry reaction, which easily occurred in contrast to that in pure water. The enantioselectivity of both Henry and aza-Henry reactions was not found. However, the results are still remarkable, as we report the first use of DES as a reaction medium in a lipase-catalyzed Henry reaction.

Flowering, a Critical Phenological Stage as a Limiting Factor for Almond Native Ecotypes Cultivation in Eastern Morocco

  • Melhaoui, Reda;Abid, Malika;Mihamou, Atika;Sindic, Marianne;Caid, Hana Serghini;Elamrani, Ahmed
    • Applied Microscopy
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    • v.47 no.3
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    • pp.157-159
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    • 2017
  • This study concerns (i) Botanical characterization of local almond ecotype named "Beldi" based on flowering period and flowers color measurements (ii) Chemical characterization of almond oil such as acidity and peroxide index and specific UV absorbance values (K232 & K270). The color results of 100 flowers analyzed by chromameter shows two different color categories. The first is very light pink to whitish ($L^*=81.58$, $a^*=7.43$, $b^*=8.06$). The second is a dark pink ($L^*=71.64$, $a^*=18.34$, $b^*=4.97$) with a difference in color between the two categories ${\Delta}E=15.07$. Compared to Ferragnes/Ferraduel varieties, Beldi almond kernel has almost a comparable oil yield but different acidity and peroxide values which are 0.81%, $8.12meq/O_2/kg$ and 0.40%, $16.39meq/O_2/kg$ respectively.

Implementation of the Extended Data Encryption Standard(EDES) (확장된 DES 구현)

  • Han, Seung-Jo;Kim, Pan-Koo
    • The Transactions of the Korea Information Processing Society
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    • v.4 no.6
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    • pp.1565-1575
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    • 1997
  • A new encryption algorithm had been proposed as a replacement to the Data Encryption Standard (DES) in [1,2]. It called the Extended DES (EDES) has a key length of 112 bits. The plaintext data consists of 96 bits divided into 3 sub-blocks of 32 bits each. The EDES has a potentially higher resistance to differential cryptanalysis that the DES due to the asymmetric number of f functions performed on each of the 3 sub-blocks and due to the increase of S-boxes from 8 to 16. This paper propose a hardware design for the EDES and its implementation in VLSI. The VLSI chip implements data encryption and decryption in a single hardware unit. With a system clock frequency of 15Mhz the device permits a data conversion rate of about 90Mbit/sec. Therefore, the chip can be applied to on-line encryption in high-speed networking protocols.

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Work Posture Analysis Using Digital Ergonomic Simulation (디지털 인간공학 시뮬레이션 기법을 이용한 작업자세 분석)

  • Kim, Nam-Du;Yim, Hyun-June;Park, Hee-Sok;Cha, Tae-In
    • Journal of the Ergonomics Society of Korea
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    • v.26 no.2
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    • pp.81-88
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    • 2007
  • The objective of this study was to investigate the validity of the digital ergonomic simulation (DES) method as a prospective alternative to the ergonomic analyses conducted by experts. The DES method utilizes commercial digital manufacturing software, and can compute the RULA scores continuously throughout the simulated work cycle. It was shown in a case study that the accuracy and objectivity of the DES method are superior to those obtained by experts. Also, it was demonstrated that the DES method has a distinct capability to simulate and validate a proposed work plan. Major limitations of the current DES method lie in the extensive time and efforts required for accurate digital simulation, which may be overcome through an automatic module for RULA data acquisition and a motion capture system.

Discovery Elbow System arthroplasty polyethylene bearing exchange: outcomes and experience

  • Daniel L J Morris;Katherine Walstow;Lisa Pitt;Marie Morgan;Amol A Tambe;David I Clark;Timothy Cresswell;Marius P Espag
    • Clinics in Shoulder and Elbow
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    • v.27 no.1
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    • pp.18-25
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    • 2024
  • Background: The Discovery Elbow System (DES) utilizes a polyethylene bearing within the ulnar component. An exchange bearing requires preoperative freezing and implantation within 2 minutes of freezer removal to allow insertion. We report our outcomes and experience using this technique. Methods: This was an analysis of a two-surgeon consecutive series of DES bearing exchange. Inclusion criteria included patients in which exchange was attempted with a minimum 1-year follow-up. Clinical and radiographic review was performed 1, 2, 3, 5, 8 and 10 years postoperative. Outcome measures included range of movement, Oxford Elbow Score (OES), Mayo Elbow Performance Score (MEPS), complications and requirement for revision surgery. Results: Eleven DESs in 10 patients were included. Indications were bearing wear encountered during humeral component revision (n=5); bearing failure (n=4); and infection treated with debridement, antibiotics and implant retention (DAIR; n=2). Bearing exchange was conducted on the first attempt in 10 cases. One case required a second attempt. One patient developed infection postoperatively managed with two-stage revision. Mean follow-up of the bearing exchange DES was 3 years. No further surgery was required, with no infection recurrence in DAIR cases. Mean elbow flexion-extension and pronosupination arcs were 107°(±22°) and 140° (±26°). Mean OES was 36/48 (±12) and MEPS was 83/100 (±19). Conclusions: Our results support the use of DES bearing exchange in cases of bearing wear with well-fixed stems or acute infection. This series provides surgeons managing DES arthroplasty with management principles, successful and reproducible surgical techniques and expected clinical outcomes in performing DES polyethylene bearing exchange. Level of evidence: IV.

Design and Implementation of Modified Isolated Double DES Using VHDL (VHDL을 이용한 개선된 Isolated 2중 DES의 설계 및 구현)

  • 이재철;홍진표;강민섭
    • Proceedings of the IEEK Conference
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    • 1999.11a
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    • pp.220-223
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    • 1999
  • Conventional double DES has been not only shown to have a vulnerable drawback to attack method called 'Meet-in-the-Middle', but also to be hard to use that it is because software implementation has a number of problem in real time processing. This paper describes the design and implementation of modified Isolated double DES algorithm using VHDL for resolving the above problems. In this approach, we also discuss an efficient method for increasing cipher strength through expansion of key length.

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SECOND COHOMOLOGY OF aff(1) ACTING ON n-ARY DIFFERENTIAL OPERATORS

  • Basdouri, Imed;Derbali, Ammar;Saidi, Soumaya
    • Bulletin of the Korean Mathematical Society
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    • v.56 no.1
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    • pp.13-22
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    • 2019
  • We compute the second cohomology of the affine Lie algebra aff(1) on the dimensional real space with coefficients in the space ${\mathcal{D}}^n_{{\underline{\lambda}},{\mu}}$ of n-ary linear differential operators acting on weighted densities where ${\underline{\lambda}}=({\lambda}_1,{\ldots},{\lambda}_n)$. We explicitly give 2-cocycles spanning these cohomology.