• Journal of Advanced Navigation Technology
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• v.20 no.3
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• pp.182-189
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• 2016

In this paper, we propose a buoy system based on multi-hop relay networks for ocean observation. The proposed system consists of various sensor modules, a gateway, wireless communication modules, and a remote monitoring site. The sensor modules are integrated with various communication interfaces and connected to the gateway of the proposed buoy system with an unified protocol based on controller area network (CAN)-bus. In order to communicate with the remote monitoring site and extend the coverage, the proposed system uses long-term evolution (LTE) router and XBee mesh network modules. The field test results show that the proposed system can extend the coverage using the proposed multi-hop relay network.

• Journal of Korean Clinical Nursing Research
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• v.18 no.1
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• pp.39-51
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• 2012

Purpose: Thisstudy was conducted with an aim to get a kind of prioritiesin developing the evidence-based nursing practice guidelines in fields. Methods: This study utilized a two-round Delphi surveys from November to December, 2010 with self-administered questionnaires which had a scale ranged from 0 to 9. A total of 95 head nurses working at the forty different general hospitals was asked to evaluate the priorities in four criteria; patient coverage, certainty, improvement in patient outcome and in nursing practice (first round) and 65 head nurses were asked to decide the importance of the criteria afterwards (second round). Results: The relative importance of 4 criteria was 22.3% in patient coverage, 26.5% in certainty, 23.5% in improvement of patient outcome, and 27.7% in improvement of nursing practice as the results of the 1st round and 20.6%, 26.6%, 24.8%, and 28.0% for the 2nd round, respectively. Top five nursing practices showed high scores after considering the relative importances of the 4 criteria were medication, intravenous therapy, checking vital sign, pain management, and diagnostic test or procedures care. Conclusion: It is recommended to take into account of the priorities that were found in this study when someone intends to develop a evidence-based nursing practice guideline.

• Journal of the Optical Society of Korea
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• v.20 no.1
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• pp.94-100
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• 2016

A novel optical design for high resolution, large field of view (FOV) and multispectral remote sensing is presented. An f/7.3 Korsch and two f/17.9 Cook three-mirror optical systems are integrated by sharing the primary and secondary mirrors, bias of the FOV, decentering of the apertures and reasonable structure arrangement. The aperture stop of the Korsch system is located on the primary mirror, while those of the Cook systems are on the exit pupils. High resolution image with spectral coverage from visible to near-infrared (NIR) can be acquired through the Korsch system with a focal length of 14 m, while wide-field imaging is accomplished by the two Cook systems whose focal lengths are both 13.24 m. The full FOV is 4°×0.13°, a coverage width of 34.9 km at the altitude of 500 km can then be acquired by push-broom imaging. To facilitate controlling the stray light, the intermediate images and the real exit pupils are spatially available. After optimization, a near diffraction-limited performance and a compact optical package are achieved. The sharing of the on-axis primary and secondary mirrors reduces the cost of fabrication, test, and manufacture effectively. Besides, the two tertiary mirrors of the Cook systems possess the same parameters, further cutting down the cost.

• Women's Health Nursing
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• v.17 no.2
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• pp.137-147
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• 2011

Purpose: This study was done to examine mothers' acceptance and its influencing factors in daughters' human papillomavirus (HPV) vaccination to prevent cervical cancer. Methods: From July 20 to August 31, 2010, 220 mothers of unmarried daughters responded to self-administered questionnaires about their acceptance of HPV vaccination for their daughters and the optimal age for HPV vaccination. Descriptive statistics, univariate logistic and multiple logistic regression were used for data analysis with SPSS/WIN 12.0. Results: Mothers indicating their willingness to pay for their daughters to receive HPV vaccination accounted for 61.8%, and willingness with health insurance coverage, 84.5%. Mean optimal age for HPV vaccination was $19.78{\pm}3.96$) years. With self-payment the factor influencing mothers willingness was necessity of HPV vaccination (OR= 30.45, 95% CI=10.33~89.15). With health insurance coverage, income (OR=3.02, 95% CI: 1.19~7.62), necessity of HPV vaccination (OR=15.05, 95% CI=4.15~54.64), concern about HPV vaccine safety (OR=2.99, 95% CI=1.15~7.76), and experience of Pap test (OR=3.16, 95% CI=1.24~8.05) were factors influencing mothers willingness. Other influencing factors were optimal age for HPV vaccination, knowing about HPV (OR=7.66, 95% CI=2.19~26.82), and age of youngest daughter (OR=3.95, 95% CI=1.34~11.68). Conclusion: Financial support is anticipated for low income families in a primary approach to increase HPV vaccination. And focusing on earlier age and concerns about vaccination are necessary to gain mothers' acceptance.

• Journal of Biosystems Engineering
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• v.36 no.1
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• pp.15-22
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• 2011

An experimental variable rate nursery sprayer was developed to adjust application rates for canopy volume in real time. The sprayer consisted of two vertical booms integrated with ultrasonic sensors, and variable rate nozzles coupled with pulse width modulation (PMW) based solenoid valves. A custom-designed microcontroller instructed the sensors to detect canopy size and occurrence and then controlled nozzles to achieve variable application rates. A spray delivery system, which consisted of diaphragm pump, pressure regulator and 4-cycle gasoline engine, offered the spray discharge function. Spray delay time, time adjustment in spray trigger for the leading distance of the sensor, was measured with a high-speed camera, and it was from 50 to 140 ms earlier than the desired time (398 ms) at 3.2 km/h under indoor conditions. Consequently, the sprayer triggered 4.5 to 12.5 cm prior to detected targets. Duty cycles of the sprayer were from 20 to 34 ms for senor-to-canopy (STC) distance from 0.30 to 0.76 m. Outdoor test confirmed that the nozzles were triggered from 290 to 380 ms after detecting tree canopy at 3.2 km/h. The spray rate of the new sprayer was 58.4 to 85.2% of the constant application rate (935 L/ha). Spray coverage was collected at four areas of evergreen canopy by water sensitive papers (WSP), and ranged from 1.9 to 41.1% and 1.8 to 34.7% for variable and constant rate applications, respectively. One WSP area had significant (P < 0.05) difference in mean spray coverage between two application conditions.

• Archives of Plastic Surgery
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• v.35 no.4
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• pp.483-486
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• 2008

Purpose: Fingertip injuries are the most common hand injuries and may lead to significant disability. Knowledge of fingertip anatomy is mandatory to treat these injuries effectively. All surgical techniques used for coverage of fingertip injuries must be based on the nature of the injury and the patient's age. Many authors have studied the method of fingertip reconstruction because goals of these treatments should include maintaining length, sensibility, motions, and appearance. The purpose of this study is to evaluate the effect of digital artery perforator flap for fingertip reconstruction without aesthetic and functional problems. Methods: From November 2006 to March 2007, the authors performed fingertip reconstruction on 3 fingers of 3 patients, aged between 41 to 54 years (average age, 47 years) using digital artery perforator flap. Results: All fingers recovered successfully and there were no necrosis of the flap. We followed up 3 cases more than 5 months. Light touch and temperature sensation could be detected in all flaps and the static two-point discrimination test was 8 mm. Conclusion: This flap is an alternative choice for coverage of fingertip defects. This method also takes short time to procedure and to recovery. The digital artery perforator flap has never been reported in Korea, however it is considered as a useful method for treatment of fingertip injury.

• Restorative Dentistry and Endodontics
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• v.12 no.2
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• pp.65-72
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• 1987

The purpose of this study was to examine the influence of several root canal sealers on the discoloration of internal surface after root canal obstruction. Twenty four sound human premolars, extracted for orthodontic or prosthodontic purposes, were randomly selected and divided into eight groups. Extracted premolars were prepared, and the following seven materials were introduced into the pulp cavities: AH 26, Fuji ionomer (Type I) cement, N2, Oxypara "Murakami", Kerr sealer, PCA sealer, and G-C's Propac ZOE cement. After 7 weeks of incubation; the discolored tooth crowns were hemisectioned, and the internal staining patterns were examined. Then, with an association of observed values the mean intensity scores and percentage of coverage scores of the internal staining patterns in teeth attained by two observers using for Chisquare test were analyzed. The results were as follows: 1. All the experimental premolar's crown showed various ranged discoloration of internal surface. 2. There was no significance between the association scores of two observers participated into this experiments:% coverage scores (P > 0.05) and intensity (P > 0.05) 3. The crowns filled with PCA sealer, AH 26, and Fuji ionomer cement was visible within a depth of one third of dentin. (P> 0.05) 4. For N2, Kerr sealer, and G-C's Propac cement, A slight dentinal staining was recorded, which penetrated up to half way into the dentin. (P> 0.05) 5. It was noticed that the teeth filled with Oxypara "Murakami" were discolored more than two thirds of the dentinal layer. 6. On the control group, there was no discoloration.

• Journal of Advanced Navigation Technology
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• v.25 no.5
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• pp.390-396
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• 2021

In this research, design and fabrication of marine repeater capable to extend communication coverage in monitoring system of fishing gear automatic identification, which is one of implementation method of the real-name electric fishing gear system declared by Ministry of Oceans and Fisheries in 2016, is reported. The proposed marine repeater is fabricated in a form of RF repeater with interference cancellation system (ICS), which can cancel the oscillation due to feedback signal between service antenna and link antenna. In design process, we secure the isolation of 30 dB between service antenna and link antenna. It is confirmed that when the level of feedback signal into repeater input be lower of 15 dB than repeater gain, error vector magnitude due to oscillation can be lower than the performance criterion of 6%, from the test verification. It is expected that the service coverage will be extended by applying the developed marine ICS RF repeater into marine IoT network including monitoring system of fishing gear automatic identification.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.4
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• pp.219-225
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• 2014

The New efficient Mux-based scan latch cell design and scan test of LOS/LOC modes are proposed for detection of delay faults in digital logic circuits. The proposed scan cell design can support LOS(Launch-off-Shift) and LOC(Launch-off-Capture) tests with high fault coverage and low scan power and it can alleviate the problem of the slow selector enable signal and hold signal by supporting the logic capable of switching at the operational clock speeds. Also, it efficiently controls the power dissipation of the scan cell design during scan testing. Functional operation and timing simulation waveform for proposed scan hold cell design shows improvement in at-speed test timing in both test modes.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.38 no.4
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• pp.292-301
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• 2001

IDDQ Testing is a very effective testing method to detect many kinds of physical defects occurred in CMOS VLSI circuits. In this paper, we consider the most commonly occurring bridging faults in current CMOS technologies and develop pattern generator for IDDQ testing using efficient IDDQ test algorithms. The complete set of bridging faults between every pair of all nodes(internal and external nodes) within circuit under test is assumed as target fault model. The merit of considering the complete bridging fault set is that layout information is not necessary. Implemented test pattern generator uses a new neighbor searching algorithm and fault collapsing schemes to achieve fast run time, high fault coverage, and compact test sets. Experimental results for ISCAS benchmark circuits demonstrate higher efficiency than those of previous methods.