• Korean Journal of Optics and Photonics
• /
• v.12 no.4
• /
• pp.339-344
• /
• 2001

We propose a method to represent binary data by modulating both the intensity and the phase of uniform plane waves with a twisted-nematic liquid crystal display for holographic digital data storage especially in a disk-shaped recording medium. As far as intensity modulation is concerned, our method is not different from the conventional method, because binary bit values 0 and 1 are represented by the dark (off) and lit (on) states of the liquid crystal display pixels, respectively (or vice versa). With our method, however, the on pixels are also controlled so that the beams passing through them can have one of two different phase delays. If the difference of the two phase delays is close to 180 degrees, we can reduce the dc component of the data image and thus improve the beam intensity uniformity at the holographic recording plane when Fourier plane holograms are recorded. The feasibility of our method is experimentally demonstrated. rated.

• Journal of Aerospace System Engineering
• /
• v.17 no.1
• /
• pp.68-78
• /
• 2023

In this paper, improvement measures were studied for false alarm (abnormal lighting) of emergency hydraulic warning light due to RF radiation signals in aircraft. When the warning lamp of the emergency hydraulic system is lit during flight due to electromagnetic interference caused by RF radiation signals, it affects flight mission and safety which can result in efficiency degradation and maintenance of flight mission. For false alarm of emergency hydraulic warning light, root cause analysis and troubleshooting were carried out. By shielding a composite strip under fuselage of the aircraft located in the path of the RF radiation signal, the RF radiation signal flowing into the emergency hydraulic indicator was blocked. Results of applying the improvement method through ground and flight monitoring were also described.

• Journal of Auto-vehicle Safety Association
• /
• v.14 no.1
• /
• pp.6-13
• /
• 2022

The Ministry of Land, Infrastructure and Transport (MoLIT) and the Korean Automobile Testing and Research Institute (KATRI) are supporting the development of Lv.3 automated vehicle (hereinafter, AV) technology by constructing an automated driving pilot city (as known as K-City) equipped with total 5 evaluation environments (urban, motorway, suburban, community road, and autonomous parking facility) which is a test bed exclusively for AV (2017~2018). An upgrade project is in a progress to materialize harsh environments such as bad weather (rain, fog, etc.) and reproduction of communication jamming (GPS blocking, etc.) with the purpose of supporting the development of Lv.4 connected & automated vehicle (hereinafter, CAV) technology (2019~2022). We intend to proactively establish a national level standard for CAV test-bed and test road requirements, test method, etc. for establishment of a road map for the construction of the test bed which is being promoted step by step and analyze and, when required, benchmark the case of China that has announced and is utilizing it. Through this, we plan to define standardized requirements (evaluation facility, evaluation system, etc.) on the test bed for the development of Lv.4/4+ CAV technology and utilize the same for the design and construction of a test bed, establishment of a road map for the construction of a real car-based test environment related to the support for autonomous driving service substantiation, etc. through provision of an evaluation environment utilizing K-City, and the establishment of a K-City upgrade strategies, etc.

• Asian-Australasian Journal of Animal Sciences
• /
• v.22 no.3
• /
• pp.410-415
• /
• 2009

The weekly liveweight gain, growing and stress parameters of quails bred using two different types of lighting for 6 weeks following hatching were examined in this study. The first type of lighting was 23 L:1 D, continuous lighting (CL), widely used in the commercial system and the second was a self-photoperiod (SP) system consisting of a continuously lit chamber and a dark chamber the quails could move to as they wished. On the first 15 days, no difference was found in liveweight gain between the two breeding systems. On the $6^{th}$ week when the trial was completed, the liveweight of the male quails upon which CL lighting was used was 159.03 g while the weight of males in the SP group was 174.43 g; these values in female quails of the CL group were 179.15 g and in the SP group were 200.68 g. The CL group had lower testis volume (TVOM, $cm^{3}$) and testis weight (TW, g) than the SP group, however there was no difference between the groups in testis weight/body weight rate (BWTW %). In female quails, the ovary weight (OW, g) and the ovary weight/body weight rate (BWOW, %) values were higher in the SP group. The CL light regime was concluded to cause stress in male quails (CL, Heterophil/Lymphocyte ratio (H/L): 0.27; SP, H/L: 0.17). In conclusion; the SP system allowing the quails to regulate their light periods increased liveweight gain and enabled sexual maturity to be gained at an earlier period than in quail on the CL system and improved their welfare.

• The Journal of Internal Korean Medicine
• /
• v.25 no.3
• /
• pp.640-647
• /
• 2004

Pregnancy related stroke is significant because it has dire impact on both mother and the fetus. Pregnant or puerperal women are reported to have about 13-fold more risk of stroke compared to non-pregnant women. Pregnancy-related stroke must be differentiated from stroke in elderly patients, because it is different in pathophysiological etiologies and recurrence rates and also diagnostic and therapeutic methods may affect the fetal health status. Because the VI cranial nerve manages lateral rectus muscles, it' s palsy causes sudden onset of double vision. The eyes turn medially. In this article, one case of paralytic strabismus resulting from pontine hematoma during puerperium is reported. It was treated with herb medicine and acupuncture. Symptoms improved. This case is submitted with a brief overview of related lit.

• Advances in Traditional Medicine
• /
• v.7 no.4
• /
• pp.409-417
• /
• 2007

We investigated the effect of Arogh, a polyherbal formulation (PHF) on animal models of anxiety based on exploratory behavior. The anxiolytic activity of polyherbal formulation (30, 100, 300 and 500 mg/kg) was studied using various behavioural paradigms such as elevated plus maze (EPM), light/dark apparatus (LDA), open field apparatus (OFA), hole board apparatus (HBA). Diazepam (1 mg/kg) was used as a standard anxiolytic drug. The effect of PHF (100 and 300 mg/kg) on serotonin, dopamine and noradrenaline mediated behaviour was studied by lithium induced head twitches in rats, haloperidol induced catalepsy in mice and clonidine induced hypothermia in rats respectively. In EPM, PHF (100, 300 and 500 mg/kg) significantly (P < 0.05) increased the time spent in open arms and the number of entries in open arms. In LDA, PHF (100, 300 and 500 mg/kg) significantly (P < 0.05) increased the time spent in lit zone. In OFA, PHF (100, 300 and 500 mg/kg) significantly (P < 0.05) increased the number of assisted rearing and the number of squares traversed. In HBA, PHF (100, 300 and 500 mg/kg) significantly (P < 0.05) increased the number of head poking. In lithium induced head twitches, PHF (100 and 300 mg/kg) significantly (P < 0.05) decreased the number of head twitches. In haloperidol induced catalepsy, PHF (300 mg/kg) decreased the duration of catalepsy significantly (P < 0.05) at 60 min. In clonidine-induced hypothermia, PHF (300 mg/kg) did not modify the effect. Drugs must be carefully assessed on EPM test and therefore in the present study EPM is supported by other tests. Present study indicates that Arogh, a polyherbal formulation possess anxiolytic activity. It diminished serotonergic transmission and decreased the duration of catalepsy indicating potentiation of dopaminergic transmission. Thus, Arogh a polyherbal formulation contains bioactive principles which possess anxiolytic activity and modified 5-HT and DA mediated behaviour.

• Asian-Australasian Journal of Animal Sciences
• /
• v.17 no.7
• /
• pp.947-953
• /
• 2004

The present research was designed to evaluate the effects of pre and post-partum energy level and feeding pattern on the performance of crossbred dairy cows and their calves under farm conditions. A total of 16 crossbred dairy cows were divided into two equal groups on the basis of their body weight and milk production. One group was given 30% less and the another was given 30% more energy than MAFF's (1984) recommendation. After calving all cows were given same ad.libitum diet to assess the effects of feeding during pregnancy on their performance. It was observed that just before calving cows on low energy group gained less (p<0.05) weight than that of the cows on high energy group (12.9$\pm$11.71 vs. 42.25$\pm$12.74 kg/cow. Birth weight of calves of low energy group was lower (p<0.05) than that of the calves of high energy group (17.87$\pm$1.78 vs. 20.73$\pm$2.24 kg/calf). Cows that were on low pre-calving dietary energy level produced less milk during lactation than the cows of high energy pre-calving group (3.45$\pm$0.75 vs. 4.27$\pm$0.79 lit./cow). No significant difference was noticed on calf growth rate and reproductive parameters of cow. Energy level that was 30 % less than MAFF's (1984) recommendation was found to be very low and not suitable for our crossbred cows during their last three months of pregnancy.

• Cartoon and Animation Studies
• /
• s.18
• /
• pp.1-16
• /
• 2010

As manga is a genre characterized by combined use of letters and pictures, visual expression, that is style, is one of the most important representative elements, even beyond the structuring of the story. Shojo Manga (lit. Young girl's Manga) in particular is distinguished by visual style clearly differentiated from other manga genres. Shojo Manga uses a variety of unique techniques that cannot be found in other manga genres. The use of starry eyes in the depiction of the characters, taller than life characters, and the creative use of frames which disregard the traditional square shape are some examples. Therefore, the question arises of by whom and when such visual characteristics in Shojo Manga were created. This paper will analyze the figure of Nakahara Junichi (1913-1983), illustrator of Shojo magazines active between the 1930's and 1950's, and who as it has been stated in previous research, influenced the splendorous illustrations of Shojo Manga. Therefore, I will look for the commonalities and differences between Shojo Manga and Nakahara's oeuvre, shedding light on the origins of Shojo Manga and attempting to theorize the relationship existing between them.

• Imaging Science in Dentistry
• /
• v.41 no.4
• /
• pp.155-159
• /
• 2011

Purpose : This study was performed to determine the prevalence of maxillary canine impaction on a basis of a single panoramic radiograph in Bangladeshi population. Materials and Methods : A random sample of seven hundred panoramic radiographs was collected from the patient record of a dental clinic. All the selected panoramic radiographs were taken from January 2009 to August 2010 by a single panoramic radiograph machine with the same exposure time (19 seconds) for all radiographs. One hundred and twenty panoramic radiographs were excluded to minimize the selection bias. In a dim lit room, an observer assessed the radiographs on a standard radiographic light box. The position of the impacted maxillary canine was recorded in line with the longitudinal axis of a tooth using the edge of a metal ruler. Data were subsequently put on SPSS 11.5 software and chi-square (${\chi}^2$) tests were applied to find out the association. Results : Among 580 panoramic radiographs it was found that impacted maxillary canines were present in only 7 (1.2%) radiographs. A statistical significant difference was found between the age of the patients and the vertical position of the impacted canines (p=0.000) and between the age of the patients and the horizontal position of the impacted canines (p=0.003). Conclusion : The prevalence was found to be low compared with the present study from the limitation of panoramic image. Further study needs to include three-dimensional imaging modality.

• Journal of Science and Technology Studies
• /
• v.2 no.1 s.3
• /
• pp.157-189
• /
• 2002

Science and technology policy a lot of implicit usjustified assumptions. These assumption without being reflected may cause various social problems. In this paper, lit is shown that philosophy of science could make contribution to resolving these problems. In epistemological viewpoints, theory of science and technology policy has been analyzed. I argue that social kinds, social entities appeared in social science should be interpreted realisticaly. Realizing this realistic interpretation of social kinds, as one field of social sciences, theory of science and technology policy can deal with the causal relation among social entities and the causal influence of science and technology policy more objectively- scientific knowledge has two components. One belongs to coded knowledge and the other belong to tacit knowledge which cannot be coded. I analyze the content and characters of tacit knowledge appeling to Michael Polany. One of the important function of science and technology policy is to make tacit knowledge more fruitful. I argue that philosophy of science fit well this function. Finally I claim that philosophy of science can help science and technology policy to reduce the ethical problems caused by science and technology.