• Title/Summary/Keyword: SFTP

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A Study about Emission Characteristic of LPG Vehicle on SFTP (LPG 자동차의 SFTP 모드 배출가스 특성에 관한 연구)

  • Kim, Sungwoo;Song, Hoyoung;Lee, Minho;Kim, Kiho
    • Journal of Energy Engineering
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    • v.25 no.4
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    • pp.74-84
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    • 2016
  • After Sep. 2017, the LEV3 emission standard will be applied to gasoline and gas vehicles in Korea. This standard has HWFET and SFTP standard as well as FTP-75. Most of LPG vehicles were certificated as SULEV in Korea. Until now, only FTP-75 standard is applying for the certification but it is expected that HWFET and SFTP are used after beginning LEV3. In this paper, 8 LPG and 4 gasoline vehicles were tested on FTP-75 and SFTP to check whether the LPG vehicles can meet LEV3 SFTP standard or not and to suggest direction of development. Most of test vehicles did not meet the SFTP standard. To make up for the fault, fuel injection control improvement is needed.

Design and implementation of file transfer protocol supporting security functionalities (보안 기능을 지원하는 파일 전송 프로토콜의 설계 및 구현)

  • Ahn, Jae-Won;Choi, Beom-Jin;Ok, Sung-Jin;Kang, Jung-Ha;Kim, Jae-Young;Kim, Eun-Gi
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.5
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    • pp.3086-3092
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    • 2014
  • The FTP that provides file transfer capabilities to/from another station cannot provides data confidentialities. The FTPS and SFTP can support a security functionalities. The FTPS needs a SSL layer and SFTP use a functions of SSH. And therefore the FTPS or SFTP needs an additional modules such as SSL or SSH. In this paper, we propose a new Secured FTP protocol that can support the security functions without extra security system. The Secured FTP uses Diffie-Hellman key agreement algorithm for shared secret key generation and AES-Counter algorithm for data encryption algorithm. Our designed Secured FTP is implemented in Linux environments and the proper operations of implemented Secured FTP is verified.

Surgical Resection of Solitary Fibrous Tumors of the Pleura (고립성 섬유성 흉막 종양의 수술적 절제)

  • 장지원;김관민;심영목;한정호;이경수;김진국
    • Journal of Chest Surgery
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    • v.37 no.5
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    • pp.432-437
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    • 2004
  • Background : Solitary fibrous tumors of the pleura (SFTP) is one of rare neoplasms that originated from submesothelial mesenchyme. Clinical course or extent of surgical resection is not well known. Material and Method: We retrospectively reviewed all the clinical records of the patients who had undergone surgical resection of benign and malignant SFTP, Result: Twenty two (male female 14 : 8) patients were enrolled and mean age was 50.2(range 25∼83). Number of symptomatic patients at the time of diagnosis was 13 (59%) and the most common symptom was dyspnea. Operative approach was carried out through thoracotomy (n=14) or video-assisted thoracic surgery (n=8). Mass excision was performed in 12 cases and en bloc resection including adjacent structure in 10 cases. In all cases complete resection was performed. There was no operative mortality. Malignant SFTP were 11 cases and benign SFTP 11 cases. Local recurrences (n=2) or distant metastasis (n=6) occurred only in malignant SFTP. Conclusion: Number of symptomatic patients, on bloc resection, and recurrence was more in malignant SFTP. Although complete surgical resection is known as treatment of choice for SFTP, further study should be performed about systemic therapeutic modalities pre- or postoperatively to control recurrence and metastasis.

A Study on the Development of an Automatic Classification System for Life Safety Prevention Service Reporting Images through the Development of AI Learning Model and AI Model Serving Server (AI 학습모델 및 AI모델 서빙 서버 개발을 통한 생활안전 예방 서비스 신고 이미지 자동분류 시스템 개발에 대한 연구)

  • Young Sic Jeong;Yong-Woon Kim;Jeongil Yim
    • Journal of the Society of Disaster Information
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    • v.19 no.2
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    • pp.432-438
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    • 2023
  • Purpose: The purpose of this study is to enable users to conveniently report risks by automatically classifying risk categories in real time using AI for images reported in the life safety prevention service app. Method: Through a system consisting of a life safety prevention service platform, life safety prevention service app, AI model serving server and sftp server interconnected through the Internet, the reported life safety images are automatically classified in real time, and the AI model used at this time An AI learning algorithm for generation was also developed. Result: Images can be automatically classified by AI processing in real time, making it easier for reporters to report matters related to life safety.Conclusion: The AI image automatic classification system presented in this paper automatically classifies reported images in real time with a classification accuracy of over 90%, enabling reporters to easily report images related to life safety. It is necessary to develop faster and more accurate AI models and improve system processing capacity.

Secure FTP Technique with TLS and OTP (TLS와 OTP를 이용한 보안 FTP 기법)

  • Kim, Eui-jeong;Seo, Tae-ho
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2019.05a
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    • pp.197-200
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    • 2019
  • File Transfer Protocol (FTP) is a protocol for transferring files between computers, FTPS with TLS, and SFTP based on similar SSH. The keynote to apply one-time password (OTP) has been diffused to resolve identity and password theft cases. In this paper, it has been confirmed that both data transmission and identity authentication using OTP at TLS level are possible without significant change in user client.

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Design and Implementation of an Ethereum-Based Deliverables Management System for Public Information Software Project (이더리움 기반 공공정보 소프트웨어 사업산출물 관리 시스템 설계 및 구현)

  • Lee, Eun Ju;Kim, Jin Wook
    • KIPS Transactions on Computer and Communication Systems
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    • v.11 no.6
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    • pp.175-184
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    • 2022
  • Blockchain is being studied in various fields such as logistics, fintech, medical care, and the public sector. In the public information software project, some deliverables are omitted because the developed deliverables and the deliverables requested by the project management methodology do not match, and an additional process is required for payment. In this paper, we propose the deliverables management system for public information software project which is configured a distributed environment using the Ethereum blockchain and which has an automatic payment system only when all deliverables are approved. This system can keep the service available in case of system failure, provide transparency and traceability of deliverables management, and can reduce conflicts between the ordering company and the contractor through automatic payment. In this system, the information of deliverables is stored in the blockchain, and the deliverables that their file name is the hash value calculated by using the version information and the hash value of the previous version deliverable, are stored in the SFTP server. Experimental results show that the hash value of the deliverables registered by the contractor is correct, the file name of the deliverables stored in the SFTP server is the same as the hash value registered in the Ethereum blockchain, and the payment is made automatically to the Ethereum address of the contractor when all deliverables are approved.

SSH Traffic Identification Using EM Clustering (EM 클러스터링을 이용한 SSH 트래픽 식별)

  • Kim, Kyoung-Lyoon;Kim, Myung-Sup;Kim, Hyoung-Joong
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.37B no.12
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    • pp.1160-1167
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    • 2012
  • Identifying traffic is an important issue for many networking applications including quality of service, firewall enforcement, and network security. Once we know the purpose of using the traffic in the firewall, we can allow or deny it and provide quality of service, and effective operation in terms of security. However, a number of applications encrypts traffics in order to enhance security or privacy. As a result, effective traffic monitoring is getting more difficult. In this paper, we analyse SSH encrypted traffic and identify differences among SSH tunneling, SFTP, and normal SSH traffics. By using EM clustering, we identify traffics and validate experiment results.

The Effect of Exhaust Gas Recirculation (EGR) on Combustion Stability, Engine Performance and Exhaust Emissions In a Gasoline Engine

  • Jinyoung Cha;Junhong Kwon;Youngjin Cho;Park, Simsoo
    • Journal of Mechanical Science and Technology
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    • v.15 no.10
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    • pp.1442-1450
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    • 2001
  • The EGR system has been widely used to reduce nitrogen oxides (NO$\_$x/) emission, to improve fuel economy and suppress knock by using the characteristics of charge dilution. However, as the EGR rate at a given engine operating condition increases, the combustion instability increases. The combustion instability increases cyclic variations resulting in the deterioration of engine performance and emissions. Therefore, the optimum EGR rate should be carefully determined in order to obtain the better engine performance and emissions. An experimental study has been performed to investigate the effects of EGR on combustion stability, engine performance,70x and the other exhaust emissions from 1.5 liter gasoline engine. Operating conditions are selected from the test result of the high speed and high acceleration region of SFTP mode which generates more NO$\_$x/ and needs higher engine speed compared to FTP-75 (Federal Test Procedure) mode. Engine power, fuel consumption and exhaust emissions are measured with various EGR rate. Combustion stability is analyzed by examining the variation of indicated mean effective pressure (COV$\_$imep/) and the timings of maximum pressure (P$\_$max/) location using pressure sensor. Engine performance is analyzed by investigating engine power and maximum cylinder pressure and brake specific fuel consumption (BSFC)

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A Case of a Solitary Fibrous Tumor of the Pleura Presenting as Pneumonia and Acute Respiratory Failure (폐렴과 급성 호흡부전으로 나타난 흉막의 고립성 섬유성 종양 1예)

  • Park, Hye Sun;Kwak, Hyun Jung;Park, Dong Won;Koo, Tai Yeon;Kim, Hye Young;Park, So Yeon;Ahn, Seong Eun;Kim, Sang-Heon;Kim, Tae Hyung;Sohn, Jang Won;Chung, Won Sang;Yoon, Ho Joo;Shin, Dong Ho;Park, Sung Soo
    • Tuberculosis and Respiratory Diseases
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    • v.65 no.4
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    • pp.334-338
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    • 2008
  • Solitary fibrous tumors of the pleura (SFTPs) are relatively rare tumors that originate from the mesenchymal cells of the submesothelial tissue of the pleura. Patients with SFTPs are often asymptomatic, while some patients experience pleuritic chest pain, cough and/or dyspnea. We report here on a case of SFTP, and the patient presented with septic shock and respiratory failure that required mechanical ventilation. A 68-year-old woman was admitted for the evaluation of her dyspnea and generalized edema. Chest imaging studies showed an 18 cm-sized voluminous mass occupying the right thoracic cavity with anterior displacement of hilar structures and atelectasis of the right lung. Immediately after admission, she developed pneumonia and septic shock that required antibiotics and mechanical ventilation. She displayed a partial response to medical treatment, and then complete excision of the tumor was performed and the pathologic examination revealed benign SFTP. Afterward, she fully improved without evidence of recurrence until now.

A Case of Solitary Fibrous Pleura Tumor Associated with Severe Hypoglycemia: Doege-Potter Syndrome

  • Jang, Jong Geol;Chung, Jin Hong;Hong, Kyung Soo;Ahn, June Hong;Lee, Jae Young;Jo, Jae Ho;Lee, Dong Won;Shin, Kyeong Cheol;Lee, Kwan Ho;Kim, Mi Jin;Lee, Jung Cheul;Lee, Jang Hoon;Lee, Jae Kyo
    • Tuberculosis and Respiratory Diseases
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    • v.78 no.2
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    • pp.120-124
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    • 2015
  • Solitary fibrous tumor of the pleura (SFTP) is a rare primary intrathoracic tumor that arises from mesenchymal tissue underlying the mesothelial layer of the pleura. It usually has an indolent clinical course. The hypoglycemia that accompanies SFTP was first described by Doege and Potter independently in 1930, hence the eponym Doege-Potter syndrome (DPS). The incidence of DPS is reported to be ~4%. In this report, we present a typical case of DPS that was cured through complete surgical resection.