• Proceedings of the Korean Information Science Society Conference
• /
• 2000.04a
• /
• pp.36-38
• /
• 2000

An optoelectronic database filter chip for high performance database computers and applications is proposed. The proposed device is designed to perform the selection and projection operations of relational database operation on-the-fly in page-parallel manner to increase the overall performance of a database system. The device utilizes CMOS smart pixel array consists of detector and combinational logic circuit to perform the selection and projection operation.

• Journal of the Korean Institute of Telematics and Electronics B
• /
• v.33B no.7
• /
• pp.86-98
• /
• 1996

Modulation and demodualtion circuits of chaos frequency shift keying have been implemented using chua's circuits. The modulatin circuit, which is designed ot perform the frequency-doubling by coupled synchronization wihtout changing the intrinsic characteristics of its two chaos signals generated, modulates the digital input signals. The demodulation circuit detects the digital input signals form carrier by drive synchronization. these circuits, which are simplest until now and have no restriction to their digital input amplitudes, perform the aimed functions.

• Proceedings of the KIEE Conference
• /
• 2000.07d
• /
• pp.2443-2445
• /
• 2000

In this paper, the Intergrated SCADA is used to computer systems designed to perform the following functions for power plant. - to collect data from industrial plant devices or transducers - to process and perform calculations on the collected data - to present collected and derived data on displays on MMI - to accept commands entered by human operators and act on them such as sending control commands to plant devices. This system is characterised by open architectured that is based on the internationally recognized industrial standard for industrial automation control language, the IEC 1131-3

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.18 no.36
• /
• pp.315-322
• /
• 1995

Quality audit is one of tools to evaluate the effectiveness and compliance of quality system. Quality system will be improved through quality audit. This paper describes the considerations such as audit team, audit process, audit checklist and auditor's communication skills to perform effective quality audit. The result of quality audit depends on the auditees attitudes. Thus, the auditor's manner is very important to gain a good audit result.

• Annals of Clinical Neurophysiology
• /
• v.23 no.2
• /
• pp.82-91
• /
• 2021

Carotid duplex ultrasound is commonly used to diagnose various carotid artery diseases due to it being noninvasive and easy to perform. Carotid atherosclerosis is a major indicator for the need to perform carotid duplex ultrasound, which can determine the degree of stenosis, plaque characteristics, and intima-media thickness. It can also be used to screen and follow-up after carotid revascularization. Here we discuss the standard techniques, interpretations, and clinical indicators for carotid duplex ultrasounds.

• The monthly packaging world
• /
• s.82
• /
• pp.144-147
• /
• 2000

• Convergence Security Journal
• /
• v.3 no.2
• /
• pp.1-10
• /
• 2003

In the distributed-computing environment, applications or users have to share resources and communicate with each other in order to perform their jobs more efficiently. In this case, it is important to keep resources and information integrity from the unexpected use by the unauthorized user. Therefore, there is a steady increase in need for a reasonable way to authentication and access control of distributed-shared resources. In RBAC, there are role hierarchies in which a higher case role can perform permissions of a lower case role. No vise versa. Actually, however, it is necessary for a lower case role to perform a higher case role's permission, which is not allowed to a lower case role basically. In this paper, we will propose a permission delegation method, which is a permission delegation server, and a permission delegation protocols with the secret key system. As the result of a permission delegation, junior roles can perform senior role's permissions or senior role itself on the exceptional condition in a dedicated interval.

• Journal of Korea Society of Industrial Information Systems
• /
• v.16 no.1
• /
• pp.37-48
• /
• 2011

Sensor networks monitor the environment, collect sensed data, and relay the data back to a collection point. Although sensor nodes have very limited hardware resources, they require an operating system that can provide efficient resource management and various application environments. In addition, the wireless sensor networks require the code update previously deployed to patch bugs in program and to improve performance of kernel service routines and application programs. This paper presents EPRCU (Easy to Perform Remote Code Update), a new operating system for wireless sensor nodes, which has enhanced functionalities to perform remote code update. To achieve an efficient code update, the EPRCU provides dynamic memory allocation and program memory management. It supports the event-driven kernel, which uses priority-based scheduling with the application of aging techniques. Therefore, the proposed operating system is not only easy to perform wireless communication with the remote code update but also suitable for various sensor network applications.

• Research in Community and Public Health Nursing
• /
• v.31 no.3
• /
• pp.384-394
• /
• 2020

Purpose: The study aimed to investigate elementary and secondary school teacher's knowledge, attitude, and self-efficacy regarding cardiopulmonary resuscitation (CPR), and explore which factors affect their intention to perform CPR. Methods: A descriptive correlational study design was utilized. Data were collected using self-reported questionnaire from 147 teachers. Statistical analysis was conducted using descriptive statistics, t-test, 𝑥² test, F-test, Pearson correlation coefficients, and logistic regression with the SPSS/WIN 21.0 program. Results: The average of knowledge, attitude and self-efficacy on CPR was 11.11±1.88 out of 15, 42.81±5.22 out of 55, and 86.19±17.74 out of 120 in order. CPR performance intention had significantly positive correlations with knowledge, attitude, and self-efficacy on CPR. In logistic regression, factors significantly affecting intention to perform CPR were the total number of training sessions on CPR (OR=12.15, 95% CI: 2.83~52.20), attitude on CPR (OR=9.26, 95% CI: 1.61~53.34), and self-efficacy on CPR (OR=1.72, 95% CI: 1.04~2.84), which accounted for 42.7% of the variance. Conclusion: In order to increase the intention to perform CPR among teachers in elementary and secondary schools, it is necessary for an educational program to be developed to improve positive attitudes and self-efficacy on CPR.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
• /
• v.41
• /
• pp.103-132
• /
• 2009

In international sales of goods, the buyer must pay the price for the goods as required by the contract and CISG, The buyer's this obligation includes taking such steps and complying with such formalities as may be required under the contract, which includes providing the seller with relevant letter of credit through the issuing bank. Where the parties have not stipulated the time limit within which the credit should be opened, but there is an agreed date or period for shipment, the time limit for the L/C opening should be calculated back from the agreed date of shipment or the first date of shipment, while, in addition, the buyer should open the L/C sufficiently earlier than the shipment date in order for the seller to be able to know the L/C's opening before beginning to ship the goods. The L/C provided the buyer should conform to the contract of sale. Therefore, for example, when an unconfirmed L/C is provided violating the agreement or the L/C opened states that, under a FOB contract, a "freght prepaid" bill of lading shall be presented as a required document of the L/C, the buyer has failed to perform his obligation. If the buyer fails to perform his obligations to provide the letter of credit, the seller may require the buyer to perform that obligation; may fix an additional period of time of reasonable length for performance of the obligation; or, the seller may declare the contract avoided, if the failure amounts to a fundamental breach of contract, or if the buyer does not, within the additional period of time fixed by the seller, perform the obligation; and the seller claim damages. However, when a relevant L/C has been issued for the seller, as a rule, he cannot ask directly for the buyer to pay the price before avail himself of the L/C first.