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Robotic Distal Pancreatectomy with Celiac Axis Resection
( Rong Liu ),( Sai Chou ) 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1
Methods: woman in her 70s found lesion in pancreatic neck by ordinary physical examination and denied abdominal discomfort, vomiting, nausea, fever or backache. undergone a robotic distal pancreatectomy with celiac axis resection (Appleby). Surgeon: Rong Liu, Sai Chou Results: operation time94 mins blood loss: 50ml hospital stay: 5 days postoperative pathology: pancreatic adenocarcinoma R0 without lymph(-) No postoperative pancreas fistula
유영영(Liu, Rong-Rong) 한국언어학회 2014 언어 Vol.39 No.3
The purpose of this paper is to make a point that "poda" should be divided into ‘poda1’ which indicates activity and ‘poda2’ which indicates state. ‘poda1’ has the features of activity, intention and duration, while ‘poda2’ which expresses instantaneous visual contact has the features of fortuity, passivity and instantaneite. This semantic difference about ‘poda1’ and "poda2" has a effect on their aspect. We can prove the necessity of distinguishing "poda1" from "poda2" by the combination of ‘poda’ and some adverbs such as "ilbureo‘, ’kyesok‘, ’uyeonhi‘, temporal adverbs such as ‘T-tongan’, ‘T-mane’, endings such as ‘-ko issda’, ‘-eo issda’, imperative sentences, ‘-lyeogo hada’ or negative sentences. Especially, "poida‘ can also be used to indicate state besides ‘poda2", and form corresponding relation with ‘poda2’ only, but not ‘poda1’. Furthermore, according to the aspectual properties of ‘poda‘, ‘poda1‘ can be defined as an activity verb, while ‘poda2‘ can be defined as an achievement verb. Both the composition verbs including ‘poda’ as a component and the comparison with Chinese can also be helpful to proving the rationality of distinguishing ‘poda1’ and ‘poda2’.
Liu, Rong,Kwok, Yi-Lin,Li, Yi,Lao, Terence-T,Zhang, Xin,Dai, Xiao-Qun The Korean Fiber Society 2006 Fibers and polymers Vol.7 No.4
The beneficial effects of graduated compression stockings (GCS) in prophylaxis and treatment of venous disorders of human lower extremity have been recognized. However, their pressure functional performances are variable and unstable in practical applications, and the exact mechanisms of action remain controversial. Direct surface pressure measurements and indirect material properties testing are not enough for fully understanding the interaction between stocking and leg. A three dimensional (3D) biomechanical mathematical model for numerically simulating the interaction between leg and GCS in dynamic wear was developed based on the actual geometry of the female leg obtained from 3D reconstruction of MR images and the real size and mechanical properties of the compression stocking prototype. The biomechanical solid leg model consists of bones and soft tissues, and an orthotropic shell model is built for the stocking hose. The dynamic putting-on process is simulated by defining the contact of finite relative sliding between the two objects. The surface pressure magnitude and distribution along the different height levels of the leg and stress profiles of stockings were simulated. As well, their dynamic alterations with time processing were quantitatively analyzed. Through validation, the simulated results showed a reasonable agreement with the experimental measurements, and the simulated pressure gradient distribution from the ankle to the thigh (100:67:30) accorded with the advised criterion by the European committee for standardization. The developed model can be used to predict and visualize the dynamic pressure and stress performances exerted by compression stocking in wear, and to optimize the material mechanical properties in stocking design, thus, helping us understand mechanisms of compression action and improving medical functions of GCS.
Liu, Rong,Kwok, Yi-Lin,Li, Yi,Lao, Terence-T,Dai, Xiao Qun,Zhang, Xin The Korean Fiber Society 2007 Fibers and polymers Vol.8 No.3
The most significant medical function of graduated compression stocking (GCS) is to provide controlled support and pressure to the skin surface and the underlying tissues of the lower extremity, to prevent and treat venous disease, thus improving the blood circulation. However, due to lack of suitable technologies for the experimental measurements, the transfer mechanisms of the external pressure applied by GCS and internal stress states within the leg soft tissue were not well examined, which bring some difficulties to GCS compression design. The present study numerically simulated and analyzed surface pressure applied by GCS and the cross-sectional deformations at the target region of leg. The underlying tissues stress profiles as well as their dynamic alterations with time processing were presented and quantitatively investigated. Moreover, the medical significance of the cross-sectional inner stress distributions was discussed. The validation results indicated that the simulated pressure profiles applied by GCS agreed reasonably well with the measured ones. The developed biomechanical model can be used for prediction and analysis of the pressure functional performances applied by GCSs, thus helping us more understanding mechanisms of compression action and improving their medical functions.
Liu Rong,Kwok Yi-Lin,Li Yi,Lao Terence-T,Zhang Xin The Korean Fiber Society 2005 Fibers and polymers Vol.6 No.4
Graduated compression stockings (GCS) have been widely used for the prophylaxis and treatment of venous diseases. Their gradient pressure function largely related to their fabric structure and material properties. By combing fabric physical testing and wear trials, this study investigated the GCSs fabric structure and material properties at different locations along the stocking hoses, and quantitatively analyzed the effects of fabrics on skin pressure longitudinal and transverse distributions. We concluded that, Structural characteristics and material properties of stocking fabrics were not uniform along the hoses, but a gradual variation from ankle to thigh regions, which significantly influenced the corresponding skin pressure gradient distributions; Tensile (WT, EM) and shearing properties (G) generated most significant differences among ankle, knee and thigh regions along the stocking hose, which significantly influenced the skin pressure lognitudinal gradient distribution. More material indices generating significant gradual changes occurred in the fabric wale direction along stocking hose, meaning that materials properties in wale direction would exert more important impact on the skin pressure gradient performances. And, the greater tensibility and smoother surface of fabric in wale direction would contribute to put stocking on and off, and facilitate wearers' leg extension-flexion movements. The indices of WT and EM of stocking fabrics in series A have strong linear correlations with skin pressure lognitudinal distribution, which largely related to their better performances in gradual changes of material properties. Skin pressure applied by fabric with same material properties produced pronounced differences among four different directions around certain cross-sections of human leg, especially at the ankle region; and, the skin pressure magnitudes at ankle region were more easily influenced by the materials properties, which were considered to be largely related to the anatomic structure of human leg.
Rong Liu,Shuting Lyu,Tiefeng Wang 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.37 No.-
The feasibility of producing acrolein from crude glycerol was studied by the dehydration reaction overH3PW12O40 (HPW) supported on Cs-modified SBA-15 (HPW/Cs-SBA). The influence of impurities incrude glycerol was investigated. Only the alkali metal ions caused catalyst deactivation and decreasedthe acrolein selectivity because they decreased the amount of catalytically effective medium Brønstedacid sites. This problem was solved by glycerol desalination, and a stable acrolein yield of 85% wasobtained through 60 h of reaction, which was as good as that with pure glycerol. In addition, HPW/Cs-SBA showed good thermal stability and regeneration ability after the reaction with desalted crudeglycerol.