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Evaluation of Streptomyces saraciticas as Soil Amendments for Controlling Soil-Borne Plant Pathogens
Pei-Hsuan Wu,Tung-Tsuan Tsay,Peichen Chen 한국식물병리학회 2021 Plant Pathology Journal Vol.37 No.6
Soil-borne diseases are the major problems in mono cropping. A mixture (designated LTM-m) composed of agricultural wastes and a beneficial microorganism Streptomyces saraceticus SS31 was used as soil amendments to evaluate its efficacy for managing Rhizoctonia solani and root knot nematode (Meloidogyne incognita). In vitro antagonistic assays revealed that SS31 spore suspensions and culture broths effectively suppressed the growth of R. solani, reduced nematode egg hatching, and increased juvenile mortality. Assays using two Petri dishes revealed that LTM-m produced volatile compounds to inhibit the growth of R. solani and cause mortality to the root knot nematode eggs and juveniles. Pot and greenhouse tests showed that application of 0.08% LTM-m could achieve a great reduction of both diseases and significantly increase plant fresh weight. Greenhouse trials revealed that application of LTM- m could change soil properties, including soil pH value, electric conductivity, and soil organic matter. Our re- sults indicate that application of LTM-m bio-organic amendments could effectively manage soil-borne pathogens.
Katie Pei-Hsuan Wu,Li-Ching Lin,Johnny Chuieng-Yi Lu 대한성형외과학회 2022 Archives of Plastic Surgery Vol.49 No.6
Femoral nerve injuries are devastating injuries that lead to paralysis of the quadriceps muscles, weakening knee extension to prohibit ambulation. We report a devastating case of electrical injury-induced femoral neuropathy, where no apparent site of nerve disruption can be identified, thus inhibiting the traditional choices of nerve reconstruction such as nerve repair, grafting, or transfer. Concomitant spinal cord injury resulted in spastic myopathy of the antagonist muscles that further restricted knee extension. Our strategy was to perform (1) supercharge end-to-side technique (SETS) to augment the function of target muscles and (2) fractional tendon lengthening to release the spastic muscles. Dramatic postoperative improvement in passive and active range of motion highlights the effectiveness of this strategy to manage partial femoral nerve injuries.
Crack Detection for Metal Injection Molded Parts
( Hsing-meng Wang ),( Pei-hsuan Wu ),( Wen-tzong Lee ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
In the research, image processing and machine learning techniques are employed on the surface defect detection of metal injection molded parts. There are two sections in this manuscript; one is image capturing system, and another one is the machine vision inspection system. For image capturing system, the ring light with diffuser is used, and it could project uniform light on the metal surface. CCD cameras are used to capture the images of metal injection molded parts. To obtain the best quality image, the inspection system uses Sobel operator searching for the focused position where the sharpness measure is maximized. For the machine vision inspection system, local feature information of the image is extracted by Histogram of oriented gradient, Gary level co-occurrence matrix and Local binary patterns. The selected features are imported into the support vector machines classification image to classify the crack defects.
A shelf-life study of silica- and carbon-based mesoporous materials
Emma M. Björk,Aylin Atakan,Pei-Hsuan Wu,Alessandra Bari,Carlotta Pontremoli,Kai Zheng,Dimitra Giasafaki,Giorgio Iviglia,Elisa Torre,Clara Cassinelli,Marco Morra,Theodore Steriotis,Georgia Charalambopo 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.101 No.-
Mesoporous silica- and carbon-based materials, including bioactive glasses, have proven potential ascomponents of medical devices and as drug carriers. From an application perspective, knowledge aboutthe shelf-life stability of these materials under various conditions is vital. Here, mesoporous bioactiveglasses (MBGs) synthesized by aerosol-assisted spray-drying and by a batch sol–gel method, mesoporoussilicas of SBA-15 type, and mesoporous carbons CMK-1 and CMK-3 have been stored under varying conditions,e.g. at different temperature and relative humidity (RH), and in different storage vessels. Theresults show that the silica-based materials stored in Eppendorfs are sensitive to humidity. Spray driedMBGs decompose within 1 month at a RH >5%, whilst sol–gel MBGs are more stable up to a RH >60%. Changing the storage vessel to sealed glass flasks increases the MBGs lifetime significantly, with nodegradation during 2 months of storage at a RH = 75%. SBA-15 stored in Eppendorfs are more stable comparedto MBGs, and addition of F- ions added during the synthesis affects the material degradation rate. Mesoporous carbons are stable under all conditions for all time points. This systematic study clearlydemonstrates the importance of storage conditions for mesoporous materials which is crucial knowledgefor commercialization of these materials.
Mitigating SYN flooding Attack and ARP Spoofing in SDN Data Plane
Ting-Yu Lin,Jhen-Ping Wu,Pei-Hsuan Hung,Ching-Hsuan Shao,Yu-Ting Wang,Yun-Zhan Cai,Meng-Hsun Tsai 한국통신학회 2020 한국통신학회 APNOMS Vol.2020 No.09
As the number of network devices increases rapidly, it becomes more and more difficult to defend network attacks. Large-scaled attacks, such as SYN flooding, may lead to heavy burden to the switches as well as the controller in a software defined network (SDN). In this paper, we investigate the SYN flooding and Address Resolution Protocol (ARP) spoofing attacks in SDN, and then propose mechanisms to address these two attacks. We also present a new scheme to detect SYN flooding by using only a few forwarding rules. Moreover, we utilize the Programming Protocol-independent Packet Processors (P4) technique to mitigate the burden of the controller.