• 제목/요약/키워드: DELL

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Purification and enzymatic properties of a peroxidase from leaves of Phytolacca dioica L. (Ombú tree)

  • Guida, Vincenzo;Criscuolo, Giovanna;Tamburino, Rachele;Malorni, Livia;Parente, Augusto;Maro, Antimo Di
    • BMB Reports
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    • v.44 no.1
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    • pp.64-69
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    • 2011
  • A peroxidase (PD-cP; 0.47 mg/100 g leaves) was purified from autumn leaves of Phytolacca dioica L. and characterized. PD-cP was obtained by acid precipitation followed by gel-filtration and cation exchange chromatography. Amino acid composition and N-terminal sequence of PD-cP up to residue 15 were similar to that of Spinacia oleracea (N-terminal pairwise comparison showing four amino acid differences). PD-cP showed a molecular mass of approx. 36 kDa by SDS-PAGE, pH and temperature optima at 3.0 and $50.0^{\circ}C$, respectively and seasonal variation. The Michaelis-Menten constant ($K_M$) for $H_2O_2$ was 5.27 mM, and the velocity maximum ($V_{max}$) $1.31\;nmol\;min^{-1}$, while the enzyme turnover was $0.148\;s^{-1}$. Finally, the presence of $Ca^{2+}$ and $Mg^{2+}$ enhanced the PD-cP activity, with $Mg^{2+}$ 1.4-fold more effective than $Ca^{2+}$.

The characteristic analysis and model of PEM fuel cell for residential application (가정용 고분자 연료전지의 모델과 특성해석)

  • Cho, Y.R.;Kim, N.H.;Han, K.H.;Joo, K.D.;Yun, S.Y.;Baek, S.H.
    • Proceedings of the KIEE Conference
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    • 2005.04a
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    • pp.277-279
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    • 2005
  • The imbalance of energy demand and supply caused by rapid industrialization around the world and the associated environmental issues require and alternative energy source with possible renewable fuels. Political instability and depletion of cruel oils are other factors that cause fluctuation of oil price. Securing a new alternative energy source for the next century became an urgent issue that our nation is confronting with. As a matter of fact, the fuel cell technology can be widely used as next generation energy regardless of regions and climate. Specially, the ability of expansion and quick installation enable one to apply it for distributed power, where the technology is already gaining remarkable attentions for the application. Particularly, leading industrialized nations are focusing on the PEM fuel dell with anticipation that this technology will find their place of applications in the vehicles and homes. In this study, demonstrate the multi physics modeling of a proton exchange membrane(PEM) fuel cell with interdigitated flow field design. The model uses current balances, mass balance(Maxwell-Stefan diffusion for reactant, water and nitrogen gas) and momentum balance(gas flow) to simulate the PEM fuel cell behavior.

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A Study on the Security Evaluations and Countermeasure of Exposure Notification Technology for Privacy-Preserving COVID-19 Contact Tracing (COVID-19 동선 추적에서의 프라이버시 보호를 위한 Exposure Notification 기술에 대한 보안성 평가 및 대응 방안 연구)

  • Lee, Hojun;Lee, Sangjin
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.30 no.5
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    • pp.929-943
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    • 2020
  • Various methods are being presented to identify the movements of COVID-19 infected persons and to protect personal privacy at the same time. Among them, 'Exposure Notification' released by Apple and Google follows a decentralized approach using Bluetooth. However, the technology must always turn on Bluetooth for use, which can create a variety of security threats. Thus, in this paper, the security assessment of 'Exposure Notification' was performed by applying 'STRIDE' and 'LINDDUN' among the security threat modeling techniques to derive all possible threats. It also presented a new Dell that derived response measures with security assessment results and improved security based on them.

Analysis of queuing mine-cars affecting shaft station radon concentrations in Quzhou uranium mine, eastern China

  • Hong, Changshou;Zhao, Guoyan;Li, Xiangyang
    • Nuclear Engineering and Technology
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    • v.50 no.3
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    • pp.453-461
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    • 2018
  • Shaft stations of underground uranium mines in China are not only utilized as waiting space for loaded mine-cars queuing to be hoisted but also as the principal channel for fresh air taken to working places. Therefore, assessment of how mine-car queuing processes affect shaft station radon concentration was carried out. Queuing network of mine-cars has been analyzed in an underground uranium mine, located in Quzhou, Zhejiang province of Eastern China. On the basis of mathematical analysis of the queue network, a MATLAB-based quasi-random number generating program utilizing Monte-Carlo methods was worked out. Extensive simulations were then implemented via MATALB operating on a DELL PC. Thereafter, theoretical calculations and field measurements of shaft station radon concentrations for several working conditions were performed. The queuing performance measures of interest, like average queuing length and waiting time, were found to be significantly affected by the utilization rate (positively correlated). However, even with respect to the "worst case", the shaft station radon concentration was always lower than $200Bq/m^3$. The model predictions were compared with the measuring results, and a satisfactory agreement was noted. Under current working conditions, queuing-induced variations of shaft station radon concentration of the study mine are not remarkable.

Cryopreserved fascia lata allograft use in surgical facial reanimation: a retrospective study of seven cases

  • Silan, Francesco;Consiglio, Fabio;Dell'Antonia, Francesco;Montagner, Giulia;Trojan, Diletta;Berna, Giorgio
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.42
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    • pp.2.1-2.6
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    • 2020
  • Background: Facial palsy treatment comprises static and dynamic techniques. Among dynamic techniques, local temporalis transposition represents a reliable solution to achieve facial reanimation. The present study describes a modification of the temporalis tendon transfer using a cryopreserved fascia allograft. Case presentation: Between March 2015 and September 2018, seven patients with facial palsy underwent facial reanimation with temporalis tendon transfer and fascia lata allograft. Patients with long-term palsy were considered, and both physical and social functions were evaluated. The mean follow-up time was 21.5 months. No immediate complications were observed. Patients reported improvement in facial symmetry both in static and dynamic. Improvement was noticed also in articulation, eating, drinking, and saliva control. The Facial Disability Index revealed an improvement both in physical function subscale and in the social/well-being function subscale. Conclusions: This modified orthodromic technique allows to reduce the operative time and the risk of complications connected to the use of autologous tissues. The use of the cryopreserved fascia allografts from cadaveric donors seems to provide promising and long-standing results in the treatment of facial palsy.

Causes of local collapse of a precast industrial roof after a fire

  • Bruno Dal Lago;Paride Tucci
    • Computers and Concrete
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    • v.31 no.5
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    • pp.371-384
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    • 2023
  • Precast roofing systems employing prestressed elements often serve as smart structural solutions for the construction of industrial buildings. The precast concrete elements usually employed are highly engineered, and often consist in thin-walled members, characterised by a complex behaviour in fire. The present study was carried out after a fire event damaged a precast industrial building made with prestressed beam and roof elements, and non-prestressed curved barrel vault elements interposed in between the spaced roof elements. As a consequence of the exposure to the fire, the main elements were found standing, although some locally damaged and distorted, and the local collapse of few curved barrel vault elements was observed in one edge row only. In order to understand and interpret the observed structural performance of the roof system under fire, a full fire safety engineering process was carried out according to the following steps: (a) realistic temperature-time curves acting on the structural elements were simulated through computational fluid dynamics, (b) temperature distribution within the concrete elements was obtained with non-linear thermal analysis in variable regime, (c) strength and deformation of the concrete elements were checked with non-linear thermal-mechanical analysis. The analysis of the results allowed to identify the causes of the local collapses occurred, attributable to the distortion caused by temperature to the elements causing loss of support in early fire stage rather than to the material strength reduction due to the progressive exposure of the elements to fire. Finally, practical hints are provided to avoid such a phenomenon to occur when designing similar structures.

A Study on the Integrated Management Technology for Heterogeneous Hardware Sensors (이기종 하드웨어 센서 통합 관리 기술에 관한 연구)

  • Rho, Seungwoo;Ryu, Jinseung;Kim, Sangwan;Oh, Kwang Jin
    • Proceedings of the Korea Information Processing Society Conference
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    • 2022.11a
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    • pp.333-335
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    • 2022
  • 원격 하드웨어 관리 기술은 BMC 관리 기술을 사용하여 자사의 하드웨어를 원격으로 제어하고 모니터링 할 수 있는 여러 기능들을 제공하며, 이를 기반으로 대규모의 클러스터 관리를 담당한다. 자체적인 서버 관리 기술로 Dell의 iDRAC, HP의 iLO, Supermicro의 SSM 등이 있으며, 클러스터 관리 도구로는 BCM, Warewulf, xCAT, Grendel 등이 활용된다. 그러나 대부분의 자체 하드웨어 서버 관리기술은 단일 서버 관리 기능만 지원하거나, 하드웨어 센서를 추가하거나 수정할 수 있는 관리 기능을 지원하지 않는다. 또한 대규모를 지원하는 주요 클러스터 관리 도구도 관리되는 서버의 종류가 제한되거나, 지원되는 하드웨어 센서를 추가하거나 수정하기 어렵다. 이를 위해 본 논문에서는 각각 다른 하드웨어 센서 아이디를 가지고 있는 여러 서버들로 이루어진 대규모 이기종 하드웨어를 통합적으로 관리, 제어, 모니터링하기 위한 센서 템플릿 기술을 소개한다.

Studio sul Sintagma Genitivale in italiano: focalizzato sulla gerarchia tematica nella struttura sintattica (이태리어 속격구문 연구: 통사구조 내 의미역 위계를 중심으로)

  • Kang, Soon-Haeng
    • Lettere Italiane
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    • no.33
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    • pp.1-27
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    • 2011
  • Questo studio ha lo scopo di configurare la gerarchia tematica del sintagma genitivale in italiano all'interno della struttura sintattica. Il sintagma genitivale composto dalla forma "sostantivo+di+sostantivo", può avere i significati di descrizione, origine, apposizione, parte, luogo, e anche può rappresentare la struttura argomentale come argomento esterno(caso soggettivo) o argomento interno(caso oggettivo) e può assegnare il ruolo tematico di agente, tema, esperiente, beneficario in relazione al rapporto con la testa nominale oltre ad avere il significato possesivo. Per quanto riguarda la realizzazione e il significato dell'argomento nel sintagma genitivale diverse che cambiano secondo il tipo della testa nominale, ho classificato i nomi deverbali come nomi monoargomentali, nomi biargomentali, nomi triargomentali sulla base di Renzi et al(1991). Inoltre avendo confermato che il marcatore del caso genitivale di deve esserci nel caso in cui obbligatoriamente la struttura del sintagma nominale composto dai vari livelli, come NP, FP e DP, proposti da Longobardi(2001) per spiegare la differenza semantica del sintagma genitivale con la struttura sintattica, ho cercato di individuare l'ordine degli argomenti, osservando l'ambiguità e il cambiamento del significato del sintagma genitivale nel sintagma nominale. Cioé la differenza della possibilità interpretativa è una cosa strutturale, quindi possibilmente si può configurare la semantica del sintagma genitivale nella struttura sintattica.

The Comparative Study on Performance Analysis of Windows 7 and Ubuntu Applying Open Source IDS/IPS Suricata (오픈소스 IDS/IPS Suricata를 적용한 Windows7과 Ubuntu 성능 비교 분석)

  • Seok, Jinug;Kim, Jimyung;Choi, Moonseok
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.13 no.4
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    • pp.141-151
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    • 2017
  • Nowadays, It is undeniable that the threat of network security is growing as time flows due to worldwide development of wire/wireless, various Internet platform and sophisticated hacking techniques. The amount of traffics that Network security solution has to handle is increasing and recently many occurrence of explosive traffic attacks from PulseWave are being observed which has many similar characteristics to New DDos. Medium and small sized firms abroad have developed and distributed Snort and Suricata that are based on open-source Intrusion Detection System(IDS) / Intrusion Prevention System (IPS). The goal of this study is to compare between Windows7 by applying suicata 4.0.0 32bit version and Ubuntu 16.04.3 LTS by applying suicata 4.0.0 version which is an open source Intrusion Detection System / Intrusion Protection System that uses multi threads method. This experiment's environment was set as followed C1100 server model of Dell, Intel Xeon CPU L5520 2.27GHz*2 with 8 cores and 16 threads, 72GB of RAM, Samsung SSD 250GB*4 of HDD which was set on RAID0. According to the result, Suricata in Ubuntu is superior to Suricata in Windows7 in performance and this result indicates that Ubuntu's performance is far advanced than Windows7. This meaningful result is derived because Ubuntu that applied Suricata used multi core CPU and RAM more effectively.

Years of Potential Life Lost Due to Breast and Cervical Cancer: a Challenge for Brazilian Public Policy

  • Gravena, Angela Andreia Franca;Brischiliari, Sheila Cristina Rocha;Gil, Lais Moraes;Lopes, Tiara Cristina Romeiro;Demitto, Marcela De Oliveira;Agnolo, Catia Millene Dell;Borghesan, Deise Helena Pelloso;Carvalho, Maria Dalva De Barros;Pelloso, Sandra Marisa
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.23
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    • pp.10313-10317
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    • 2015
  • Background: The purpose of the article was to analyze the years of potential life lost (YPLL) of women who died from breast and cervical cancer in the State of Paran$\acute{a}$, Southern Brazil. This was a temporal trend study (2000 to 2010) about the coefficients of mortality and the years of potential life lost in women aged 20 to 70 years. Materials and Methods: Data were obtained through the database of the Department of the Unified Health System (DATASUS) and the National Mortality Information System. Results: There was a loss of 125.075 YPLL due to breast cancer, with an average of 11.370 YPLL. Regarding cervical cancer, the figure obtained was 91.625 YPLL from 2000 to 2010, with an average of 8.329 YPLL. Increased risk of death from breast cancer was observed for women aged 50 to 59 years, with a significant increase among those in the age group from 40 to 49 years. There was an increased rate of cervical cancer among women 40 to 69 years. Conclusions: The risk of death grows with increasing age, being higher from 40 years. Prevention is paramount for both cancers. Thus, preventive measures are required and a reassessment of political strategies should be adopted.