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Technology Boosts Food Security

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ChinAfrica 2022年第4期14卷 44-45页

作者： derrick SILIMINA 不详

Chinese agricultural machinery is bringing much-needed enhancements in productivity in Zimbabwe Each year, Patricia Kudakwashe and her husband would diligently cultivate and grow maize at their small farm using traditional handheld tools. They would make just $150 from selling a few bags of produce despite high demand in their community of Manicaland in east *** a meager income, Kudakwashe has struggled to pay school fees and medical bills for their four children.

关键词： bringing income struggle

Abscess drain migration into the colon following laparoscopic cholecystectomy

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Journal of Interventional Medicine 2023年第3期6卷 137-139页

作者： Daniel K.derrick Noah Fanous Anne Wells Jorge Lopera Department of Radiology UT Health San AntonioSan AntonioTXUSA

Percutaneous abscess drainage is a procedure commonly performed by interventional radiologists to provide source control on infections using CT or ultrasound *** interventionalist has many different sizes and shapes of catheters to treat abscesses of varying sizes and locations,but the general approach to each abscess is similar:provide a percutaneous route for purulence,bacteria,necrotic tissue,and other debris to escape the *** generally considered a low-risk procedure,adverse events can occur due to operator error or other *** present a unique case of an abscess drain placed into a right upper quadrant abscess that formed following laparoscopic cholecystectomy that perforated and entered the *** physicians,both in the emergency department and the radiology reading room,were able to rapidly rule out more common post-operative complications and make the correct diagnosis,likely preventing dangerous sequelae from developing in this patient.

关键词： colon diagnosis drain

Finite Element Analysis of Femoral Strains in Older Adults During Stair Ascent and Descent

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Journal of Science in Sport and Exercise 2022年第2期4卷 168-179页

作者： Chen Deng Jason C.Gillette Timothy R.derrick Division of Sport Biomechanics School of Sport ScienceBeijing Sport UniversityNo.48Xinxi RoadBeijing 100084People’s Republic of China Department of Kinesiology Iowa State UniversityAmesIAUSA

Purpose Understanding the femur load environment during daily activity is necessary for the understanding of risk of femoral pain,pain related falls,and femoral fractures,which could help the design of osteogenic exercises or the preventa-tive methods for older *** Using the finite element femur analysis,this study was to estimate the femoral strains at 9 cross-sections along the long axis of femur for stair ascent and descent(n=17;age:50-65 years).Motion analysis and inverse dynamics were com-bined with musculoskeletal modelling and optimization,then were used as input to a 3-D femur model to estimate femoral *** at the hip contact force peaks were *** The compressive and tensile strains during stair descent were greater than ascent for all or most cross-sections,especially for the proximal cross-sections of the femur:stair ascent produced−324.0±103.8 to−483.7±191.0μεcompressive strains and descent produced−608.8±288.4 to 1016.0±444.1με;stair ascent produced 336.2±105.4 to 391.8±136.9μεtensile strains and descent produced 546.9±252.8 to 741.7±333.6με.Conclusion Strains represent the material deformation effect on the bone due to the sum of all the bone external *** bone strains could help future studies analyze load conditions in a more comprehensive way for other physical activities,which predicts the risk of stress fractures and tests if alternative methods(gait type change)could reduce stress and strain effectively.

关键词： Femoral cross-sections Finite element method Bone strains Stair ascent and descent Older adults

Countering the Impact Of Drought

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ChinAfrica 2023年第12期15卷 38-39页

作者： derrick SILIMINA 不详

For Getrude Kariuki,a middle-aged smallholder farmer in Narok County in southwest Kenya,life has been a struggle for decades,but things were never as bad as they are *** has seen her maize yields dwindle over the years due to scarce rainfall,especially during the 2020-2021 farming season,leaving her and many other households in the area to rely on relief food distributed by the central government.

关键词： Impact southwest season

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A Bountiful Catch

ChinAfrica 2023年第10期15卷 42-43页

作者： derrick SILIMINA 不详

A group of fishermen from Kenya’s coastal county of Kwale sail quietly in a traditional boat,allowing it to gently glide across the deep waters of the Indian Ocean under a night sky dotted with glittering *** Karim,one of the fishermen,ponders his next fishing expedition as he unloads a bucket full of anchovies(small shoaling fish of commercial importance)locally known as“dagaa”in Swahili.

关键词： stars coastal Indian

Aiding Industrialization

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ChinAfrica 2022年第9期14卷 36-37页

作者： derrick SILIMINA 不详

China-funded technical training center imparts crucial skills to Ugandan engineering talents Christine Kamugyisha has realized her dream of studying engineering through her exemplary academic hard *** is among the 150... 详细信息

关键词： dream has ish

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Designing the Future

ChinAfrica 2023年第4期15卷 46-47页

作者： derrick SILIMINA 不详

The Africa Tech Challenge contest provides training and education opportunities for young engineers Since his early high school days, Sean Brown’s immense strength in arithmetic and science subjects has made a career in engineering an obvious *** from a humble background, 18-yearold Brown knows that hard work always pays and embracing a vision anchored on academic excellence usually opens numerous opportunities in life.

关键词： education academic engineer

A Source of Sustenance

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ChinAfrica 2023年第7期15卷 36-37页

作者： derrick SILIMINA 不详

Demand from China propels Ethiopia’s coffee exports It’s past 5 a.m. and Habib Mohammed is leaving his house to start the day at his 2.5-hectare coffee farm in the lush highlands of Ethiopia’s Oromia *** this East African country, Oromia is the natural homeland of the delicate Coffea arabica plant, which is driving an insatiable thirst for a beverage that has come to conquer the world.

关键词： driving leaving African

Uncovering the effect of poly(ethylene-co-vinyl alcohol)molecular weight and vinyl alcohol content on morphology,antifouling,and permeation properties of polysulfone ultrafiltration membrane:thermodynamic and formation hydrodynamic behavior

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Frontiers of Chemical Science and Engineering 2023年第10期17卷 1484-1502页

作者： Sania Kadanyo Christine N.Matindi derrick S.Dlamini Nozipho N.Gumbi Yunxia Hu Zhenyu Cui Jianxin Li State Key Laboratory of Separation Membranes and Membrane Processes National Center for International Joint Research on Membrane Science and TechnologyTiangong UniversityTianjin 300387China School of Materials Science and Engineering Tiangong UniversityTianjin 300387China Institute for Nanotechnology and Water Sustainability College of ScienceEngineering and TechnologyUniversity of South Africa Science CampusFlorida 1710South Africa University of California Los Angeles(UCLA)Department of Civil&Environmental EngineeringUCLA California NanoSystems Institute and UCLA Institute of the Environment&SustainabilityLos AngelesCA 90095USA

Various hydrophilic poly(ethylene-co-vinyl alcohol)(EVOH)were used herein to precisely control the structure and hydrodynamic properties of polysulfone(PSF)***,to prepare pristine PSF and PSF/EVOH blends with increasing vinyl alcohol(VOH:73%,68%,56%),the non-solvent-induced phase separation(NIPS)technique was *** glycol was used as a compatibilizer and as a porogen in N,*** and ultrasonic separation kinetic measurements were also carried out to develop an ultrafiltration membrane *** extracted membrane properties and filtration capabilities were systematically compared to the proposed ***,the addition of EVOH led to an increase in the rheology of the *** resulting membranes exhibited a microporous structure,while the finger-like structures became more evident with increasing VOH *** PSF/EVOH behavior was changed from immediate to delayed segregation due to a change in the hydrodynamic ***,the PSF/EVOH32 membranes showed high hydrophilicity and achieved a pure water permeability of 264 L·m^(–2)·h^(–1)·bar^(–1),which was higher than that of pure PSF membranes(171 L·m^(–2)·h^(–1)·bar^(–1)).In addition,PSF/EVOH32 rejected bovine serum albumin at a high rate(>90%)and achieved a significant restoration of ***,from the thermodynamic and hydrodynamic results,valuable insights into the selection of hydrophilic copolymers were provided to tailor the membrane structure while improving both the permeability and antifouling performance.

关键词： polysulfone blend modification ultrafiltration membrane formation hydrodynamics poly(ethyleneco-vinyl alcohol)copolymer