• The Korean Journal of Malacology
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• v.17 no.1
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• pp.27-33
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• 2001

The Ovarian developmental phases of the reproductive cycle of Rapana venosa can be classified into five successive stages by histological study: early active stage (September to February), late active stage (December to April), ripe stage (March to July), partially spawned stage (May to August), and recovery stage (June to September). To understand the characteristics of nutrient storage and utilization in the digestive gland cells with ovarian developmental phases, we examined the digestive gland - which is the major nutrient supply organ associated with ovarian development of the female purple shell - by biochemical methods. Total protein contents in the digestive gland tissues increased in March (late active stage) and reached the maximum in May (ripe and partially spawned stages), and then their levels sharply decreased in July (partially spawned and recovery stages). Total lipid contents in the digestive gland tissues reached the maximum in January (early active stage). Thereafter, their levels rapidly decreased from May (ripe and partially spawned stages) and reached a minimum in July (partially spawned and recovery stages). The total DNA contents did not significantly change regardless of the different developmental stages of the ovary. However, it was also found from biochemical analysis that changes in total RNA content follow the same seasonal cycling to protein. These results indicate that the digestive gland is an important energy storage and supply organ in purple shells, and that the nutrient contents of the digestive gland change in response to gonadal energy needs.

• Journal of The Korean Astronomical Society
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• v.47 no.6
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• pp.293-302
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• 2014

Simultaneous time monitoring observations of $H_2O$ $6_{16}-5_{23}$, SiO J = 1-0, 2-1, 3-2, and $^{29}SiO$ ${\upsilon}=0$, J = 1-0 lines are carried out in the direction of the Mira variable star TX Cam with the Korean VLBI Network single dish radio telescopes. For the first time, the $H_2O$ maser emission from TX Cam is detected near the stellar velocity at five epochs from April 10, 2013 (${\phi}=3.13$) to June 4, 2014 (${\phi}=3.89$) including minimum optical phases. The intensities of $H_2O$ masers are very weak compared to SiO masers. The variation of peak antenna temperature ratios among SiO ${\upsilon}=1$, J = 1-0, J = 2-1, and J = 3-2 masers is investigated according to their phases. The shift of peak velocities of $H_2O$ and SiO masers with respect to the stellar velocity is also investigated according to observed optical phases. The $H_2O$ maser emission occurs around the stellar velocity during our monitoring interval. On the other hand, the peak velocities of SiO masers show a spread compared to the stellar velocity. The peak velocities of SiO J = 2-1, and J = 3-2 masers show a smaller spread with respect to the stellar velocity than those of SiO J = 1-0 masers. These simultaneous observations of multi-frequencies will provide a good constraint for maser pumping models and a good probe for investigating the stellar atmosphere and envelope according to their different excitation conditions.

• Journal of Educational Research in Mathematics
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• v.9 no.1
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• pp.217-228
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• 1999

The fundamental theorem of calculus is the most 'fundamental' content in teaching calculus. Since the aim of teaching the theorem goes beyond simple application of it, it is difficult to teach it meaningfully. Hence, for the meaningful teaching of the fundamental theorem of calculus, this article seeks to find the educational implication of the fundamental theorem of calculus through reviewing the genetic history of it. A genetic history of the fundamental theorem of calculus can be divided into the following five phases: 1. The deductive discovery of the fundamental theorem of calculus 2. Galileo's Law of falling body and the idea of the fundamental theorem of calculus 3. The discovery of the fundamental theorem of calculus and Barrow's proof 4. Newton's mensuration 5. the development of calculus in 19th century and the fundamental theorem of calculus The developmental phases of the fundamental theorem of calculus discussed above provides the three educational implications. first, we can rediscover this theorem through deductive methods and get the ideas of it in relation to kinetic problems. Second, the developmental phases of the fundamental theorem of calculus shows that the value of this theorem lies in the harmony of its theoretical beauty and practicality. Third, Newton's dynamic image of this theorem can be a typical way of understanding the theorem. We have different aims of teaching the fundamental theorem of calculus, according to which the teaching methods can be adopted. But it is self-evident that the simple application of the theorem is just a part of teaching the fundamental theorem of calculus. Hence we must try to put the educational implications reviewed above into practice.

• The Korean Journal of Pain
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• v.30 no.2
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• pp.98-103
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• 2017

Background: The root of Peucedanum japonicum Thunb., a perennial herb found in Japan, the Philippines, China, and Korea, is used as an analgesic. In a previous study, sec-O-glucosylhamaudol (SOG) showed an analgesic effect. This study was performed to examine the antinociceptive effect of intrathecal SOG in the formalin test. Methods: Male Sprague-Dawley rats were implanted with an intrathecal catheter. Rats were randomly treated with a vehicle and SOG ($10{\mu}g$, $30{\mu}g$, $60{\mu}g$, and $100{\mu}g$) before formalin injection. Five percent formalin was injected into the hind-paw, and a biphasic reaction followed, consisting of flinching and licking behaviors (phase 1, 0-10 min; phase 2, 10-60 min). Naloxone was injected 10 min before administration of SOG $100{\mu}g$ to evaluate the involvement of SOG with an opioid receptor. Dose-responsiveness and ED50 values were calculated. Results: Intrathecal SOG showed a significant reduction of the flinching responses at both phases in a dose-dependent manner. Significant effects were showed from the dose of $30{\mu}g$ and maximum effects were achieved at a dose of $100{\mu}g$ in both phases. The ED50 value (95% confidence intervals) of intrathecal SOG was 30.3 $(25.8-35.5){\mu}g$ during phase 1, and 48.0 (41.4-55.7) during phase 2. The antinociceptive effects of SOG ($100{\mu}g$) were significantly reverted at both phases of the formalin test by naloxone. Conclusions: These results demonstrate that intrathecal SOG has a very strong antinociceptive effect in the formalin test and it seems the effect is related to an opioid receptor.

• Animal Bioscience
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• v.34 no.3_spc
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• pp.354-362
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• 2021

Broiler chickens grow rapidly, and their nutrient requirements change daily. However, broilers are fed three to five diet phases, meaning nutrients are under or oversupplied throughout production. Increasing diet phases improves production efficiency as there is less time in the production cycle that nutrients are in under or over-supply. Nevertheless, the process of administering four or more diets is costly and often impractical. New technologies are now available to blend feed to match the daily nutrient requirements of broilers. Thus, the aim of this review is to evaluate previous studies measuring the impact of increasing feed phases on nutrient utilisation and growth performance, and review recent studies taking this concept to the extreme; precision nutrition - feeding a new diet for each day of the production cycle. This review will also discuss how modern precision feeding technologies have been utilised and the potential that new technologies may bring to the poultry industry. The development of a precision nutrition regime which targets daily requirements by blending dietary components on farm is anticipated to improve the efficiency of production, reduce production cost and therefore improve sustainability of the industry. There is also potential for precision feeding technology along with precision nutrition strategies to deliver a plethora of other management and economic benefits. These include increased fluidity to cope with sudden environmental or market changes, and the ability to alter diets on a farm by farm level in a large, integrated operation. Thus, the future possibilities and practical implications for such technologies to generate a paradigm shift in feed formulation within the poultry industry to meet the rising demand for animal protein is also discussed.

• Journal of Korean Medical classics
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• v.24 no.4
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• pp.143-155
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• 2011

By examining the relationship between physiological character of stomach and true viscera pulse(眞臟脈) with "Huangdinejing(黃帝內經)", the study shows these fallowing results. Stomach is not only one of the six bowels(六腑), it represents them. It is called as yang brightness of foot(足陽明) because it has relation with function of earth among five phases(五行), great storage(倉廩) and root of five visceras and six bowels(五臟六腑), has close relationship with triple energizers(三焦). Stomach is an important organ that feeds acquired qi(後天之氣) based on food and stomach qi (胃氣) which is a transformed form by going through digestion, is significant for life conservation. In human body, the activation of stomach qi can be known by pulse. The true viscera pulse is a pulse which predicts the period of death. If stomach qi exsits, viscera qi can be led to greater yin of hand(手太陰), however, when it does not exist, five viscera qi can not be led to greater yin of hand and this kind of situation appears the true viscera pulse. Hence, by knowing the relation between stomach qi and five viscera qi, the condition of normality, disease, and death can be known. In "Hwangdineijing" it says, stomach qi, shortly string like pulse(微弦), shortly surging pulse(微鉤), shortly floating pulse(微毛), and shortly sunken pulse(微毛) shown in four seasons are normal pulse. And also it emphasizes, normal pulse is made when four seasons, five viscera pulse, and stomach qi are in harmony. In conclusion, stomach qi is based on food for well being, and a standard of judging people whether they are living in a healthy life or not.

• The Journal of Dong Guk Oriental Medicine
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• v.10
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• pp.86-97
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• 2008

Objective: The purpose of this study is to determine oriental medical concept of emotional intelligence, and to develop the ways of treatment. Methods: We investigated the literature of the oriental and western medicine about an emotional intelligence. Results: Regarding an emotional intelligence from the oriental medicine, it will follow in attributes of five elements(五行), five emotions(五志), seven passions(七情). Due to the five emotions and seven passions will take to control themselves with following the principle of poles at interinhibition, and intergeneration among the five phases. There is a possibility of trying to apply in reflection control of emotion(partIV). Five emotions(五志), depression theories(鬱症), and a control of theories of seven passions(七情調節) will be applied an emotional stability and an emotional control. Conclusion: This study showed that oriental medicine has more merits better than western medicine about emotional intelligence, because oriental medicine consider that the body and mental is an inseparable relation. The further study is necessary with the concept formulation and a historical investigation about an emotional intelligence.

• Korean Journal of Acupuncture
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• v.31 no.4
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• pp.179-187
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• 2014

Objectives : Saam acupuncture initiated by Saamdoin is traditional and originative method, which is characterized by applying the five phases theory and mother-child reinforcement-reduction principle to the selection of acupoints and needling manipulation. Our study was aimed to summarize and assess the use of acupoint SP3(Taebaek) in Saam acupuncture treatment and to further understand Saam acupuncture in an aspect of the combination of acupoints. Methods : We searched the data based on "(Do Hae Kyo Kam) Sa-Ahm's acupuncture method" for SP3 used and acupoint combination including SP3. We performed frequency analysis, network analysis, and cluster analysis for quantitative aspect. To understand clinical implication of SP3 with another acupoint, qualitative and descriptive methods were also carried out. Results and Conclusions : In our study, SP3 was frequently used for tonification of lung, spleen, heart, and kidney meridian and sedation of kidney, heart, and lung meridian. For this, many acupoints such as LU8, LU9, KI3, HT8, KI7, LU10 and LR1 were used with SP3. The combination of SP3 and other acupoints were used to treat stroke, common cold, and pain conditions including headache, low back pain, respiratory disease as well as gastroenteric troubles including stomachache, indigestion, vomiting, and constipation. To further understand Saam acupuncture, an understanding of the five transport points based on five elements characters, pathological changes (deficiency and excess) of viscera and bowels, and concept of source point should be preceded.

• Journal of the Earthquake Engineering Society of Korea
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• v.7 no.5
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• pp.19-24
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• 2003

We analysed seismic phases recorded by the 10 December 2002 Cheolwon, Korea, earthquake of $M_{L}$ 3.6 and obtained source parameters such as hypocenter, origin time, earthquake magnitude. Velocity and acceleration records used in this study are from the KMA and KIGAM seismic networks. Due to the location of the epicenter in the north of the DMZ(Demilitarized Zone), direct Pg phases were recorded only at five stations in the area south of DMZ. Identification of refracted Pn phase as the first arrival is difficult in most stations. Therefore, the hypocenter determined by existing routine methods could be affected by a large error. In order to avoid the possibility of the problem, we employed a method of seismic phase analysis developed by Kim et al.. The direct, refracted, and reflected P and S phases were successfully identified using the method together with the travel time curve data. In order to improve the accuracy in determination of the hypocenter and origin time, we included PmP and SmS phases in the analysis in addition to the phases such as Pg, Pn, Sg and Sn. The epicenter, depth, and origin time of the Cheolwon earthquake determined based on data of 11 stations within 200km from the epicenter are $38.81^{\circ}$N, $127.22^{\circ}$E, 12.0km, and 7:42:51.4(local time), respectively. The average value of the local magnitude based on the Richter's definition from all the stations is 3.6 in $M_{L}$. This magnitude is smaller by 0.2 and 0.5 compared with magnitudes determined by KMA and KIGAM, respectively.

• Journal of Korea Trade
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• v.24 no.6
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• pp.82-100
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• 2020

Purpose - This paper attempts to compare five free trade agreements with gender chapters ratified by Chile and Canada and derives lessons for Korea in terms of gender-aware trade policy. While Chile and Canada have three and two FTAs with gender chapter respectively, Korea has none so far, although it has already ratified an FTA with the two countries. Design/methodology - This study first investigates all the gender-provisions with the gender chapters, conducts a comparative analysis on the five chapters as well as a case study of one target FTA's implementation and achievements, and finally suggests policy implications for Korea's trade administration as well as trade-related agencies. Findings - According to the analysis, there are three phases in terms of advancement in gender-related trade policy. As Chile is in phase two and Canada is in phase three, Korea remains in phase one. It has a ministry related to gender within the government, but not within the OMT. It has statistics on female business, but not of women traders. It has a few gender-related provisions in its FTAs, but not a gender chapter. In this sense, new mandates related to gender-aware trade policy for OMT, KITA, and KOTRA should be provided to realize the concrete economic benefits resulting from empowering women traders and policies promoting them. Originality/value - Existing studies only focus on introducing gender-related international commitments and Korea's participation in them. This paper is the first attempt to compare actual gender chapters of five FTAs ratified by two countries with the most advanced gender chapters in the world. To gain benefits from the positive gender impact of trade agreements, negotiating and signing gender responsive FTA with future partners is one of the most efficient, as well as inclusive, trade policies urgently needed for Korea.