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노영수,박치형,황선태,김홍섭 건국대학교 의과학연구소 1994 건국의과학학술지 Vol.4 No.-
Intrascrotal hemangioma is very rare, benign vascular tumor characterized by soft and spongy like compressible vascularity. It is primarily composed of large venous channel occuring in the deep dermis and subcutaneous tissue, first reported by Robert in 1851. Complications of intrascrotal hemangioma include thrombosis, phlebitis, massive hemorrhage, and infertility. The treatment of choice is wide local excision of the tumor with the overlying skin. We have experienced a case of intrascrotal cavernous hemangioma who was a 24-year old man with painful scrotal mass and reported with literatures.
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공정제어에의 應用을 위한 마이크로 콤퓨터 시스템의 개발
李秀東,禹治水,李泰鎬,朴源深,黃德浩 울산대학교 1978 연구논문집 Vol.9 No.2
마이크로 프로세서를 이용한 디지탈 공정제어 수단이 고찰되었다. 관심의 초점은 분산-종합제어에 적합한 단말제어 프로세서에 두었다. 시험 제작된 프로세서는 8개의 제어 루우프를 운전하는 독립된 제어장치이며 동시에 종합제어를 위하여 상위 전산기와 데이타 교환이 가능하도록 설계 되었다. 주기적 샘플링에 의한 비례-적분-미분(PID)제어방식을 기본으로 하고 있으며 파라메터 값에 의하여 PI,PD등으로 축소될 수 있도록 하였다. 시험 장치에서는 주기를 2초로 하였는데 A/D변환기의 적절한 선정에 의하여 0.2초정도 까지는 쉽게 단축할 수 있다. 조작자용의 프로세서에 대한 고찰은 최소한의 기능을 가진 것에 한정하였으며 이는 실제 적용 현장과 관련하여 기능이 확장되어야 할 것이다. 사용된 마이크로 프로세서는 범용의 것으로 단말용에는 M6800계통을, 조작자용에는 SC/MP계통을 사용하였다. A microprocessor based digital process controller has been studied. The objective was to develope a stand-alone terminal processor for distributed on-line control systems. The prototype terminal proposed in this paper has the capability of handling eight independent control loops under the supervisory control of main computer and/or operator console. The control algorithm follows analog PID action based on periodically sampled data. The control action can also be reduced to PI,PD and so forth through parameter assignment. Availability of A/D converters to the authors limited sampling period to 2 seconds, but it could easily be reduced to 0.2 sec. employing appropriate A/D devices. The number of operational functions of console processor is kept minimum in this study, the expansion of which should be done for particular application. Hardware implementation was done with general purpose microprocessors; M6800 system for terminal and SC/MP system for console.
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Tai-Chi Hwang,Yu-Ting Sung,Yu-Hsi Huang,Chi-Ying Lin 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
This paper presents the application of a torque vector composition method realizing omni-directional rotor orientations for a novel standing wave spherical piezoelectric motor (SPM). The developed SPM system comprises four stators where each stator can provide three fundamental orientations or torque vectors implemented with the technique of electrode configuration. The concept of vector composition applied to the SPM system is illustrated with two stator actuation configurations: symmetrical and adjacent actuation stator pairs. The proposed method has the advantage of easy generation of new rotor orientations by adjusting the magnitude ratio of the excitation signals given to the stators. Composited vector analysis shows that the use of all stator pairs is able to offer omni-directional rotor orientations in the xy, yz, and xz planes. The estimated orientations in the experiments demonstrate the feasibility of the proposed torque vector composition method and the potentials of expanding omni-directional orientations to the whole 3D space with more than two actuating units.
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Malignant aortic body tumor in a Korean Jindo dog
Hwang, Du-Na,Kang, Byeong-Teck,Hur, Tai-Young,Chang, Byung-Joon,Park, Hee-Myung,Yhee, Ji-Young,Yu, Chi-Ho,Sur, Jung-Hyang The Korean Society of Veterinary Science 2007 大韓獸醫學會誌 Vol.47 No.3
A 7-year-old, intact female Korean Jindo dog was referred due to ataxia and pain on palpation of the thorax. Radiograph, echocardiography and computed tomogram revealed a mass on the heart base region and osteolytic change of fifth thoracic (T5) vertebra. At necropsy, a firm, encapsulated and round mass was seen arising from the heart base region surrounding the ascending aorta and pulmonary artery. Histopathologically, nests of cuboidal and polyhedral cells having abundantly granular and eosinophilic cytoplasm with round to oval nucleus were separated by fibrous septa. Immunohistochemistry using chromogranin A revealed that tumor cells were originated from neuroendocrine organ and metastasized into some organs including lung, spleen, liver, kidney and T5 vertebra. By electron microscopy, we found the electron-dense and membrane-bound granules in cytoplasm of the tumor cells. This study provides the uncommon evidence that aortic body tumor metastasized to both multiple organs and bone.
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