• Journal of Powder Materials
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• v.24 no.2
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• pp.87-95
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• 2017

Lithium silicate, a lithium-ion conducting ceramic, is coated on a layer-structured lithium nickel manganese oxide ($LiNi_{0.7}Mn_{0.3}O_2$). Residual lithium compounds ($Li_2CO_3$ and LiOH) on the surface of the cathode material and $SiO_2$ derived from tetraethylorthosilicate are used as lithium and silicon sources, respectively. Powder X-ray diffraction and scanning electron microscopy with energy-dispersive spectroscopy analyses show that lithium silicate is coated uniformly on the cathode particles. Charge and discharge tests of the samples show that the coating can enhance the rate capability and cycle life performance. The improvements are attributed to the reduced interfacial resistance originating from suppression of solid-electrolyte interface (SEI) formation and dissolution of Ni and Mn due to the coating. An X-ray photoelectron spectroscopy study of the cycled electrodes shows that nickel oxide and manganese oxide particles are formed on the surface of the electrode and that greater decomposition of the electrolyte occurs for the bare sample, which confirms the assumption that SEI formation and Ni and Mn dissolution can be reduced using the coating process.

• Korean Journal of Acupuncture
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• v.35 no.2
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• pp.105-115
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• 2018

Objectives : This research aimed to verify the validities of contraindicated acupoints in acupuncture treatment in Zhenjiudacheng. Methods : We investigated contraindicated acupoints when performing needling in Zhenjiudacheng, then verified them in today's medical knowledge and clinical studies. Results : In Zhenjiudacheng, 39 acupoints - LU2, LI4, LI13, LI14, LI16, ST1, ST9, ST12, ST17, ST25, ST30, ST42, SP6, SP11, SI18, BL8, BL9, BL56, KI11, TE7, TE8, TE19, TE20, GB3, GB18, GB21, GV10, GV11, GV17, GV22, GV24, CV1, CV4, CV5, CV8, CV9, CV15, CV17 and EX-HN11 - were described to need a careful approach in acupuncture treatment and 21 acupoints among them had contraindications. Most of the contraindications can be explained based on anatomical knowledge and results of clinical studies, and acupuncture treatment at the 39 contraindicated acupoints can induce injury of tissues or organs near the acupoints. Conclusions : The contraindicated acupoints in acupuncture treatment in Zhenjiudacheng seem to have been classified based on the adverse events experienced by doctors at that time. Therefore careful acupuncture treatment at these acupoints is needed to avoid injury to tissue or organs.

• The Journal of Korean Medicine
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• v.19 no.1
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• pp.66-88
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• 1998

This study was performed from March to September 1997 on 95 healthy students to observe the effects of acupuncture at Hap-kok (LI4) according to the meridian and qi-xue(氣血) phenomenon of oriental medicine's theory. Skin temperature on the Hap-kok (LI4) and Chun-Choo (ST25) were measured by D. 1. T. I. (Digital Infrared Thermograph Imaging) before acupuncture stimulation and 1min, 10 min after acupuncture stimulation. 1. In healthy students, the left and right mean temperature of LI4 and ST25 was $29.04\;^{\circ}C,\;29.12\;^{\cir}C\;and\;30.29\;^{\circ}C,\;30.22\;^{\circ}C$ respectively. 2. In control group, the time dependent changes for 10 min of LI4 and ST25 were $-0.32\;^{\circ}C,\;-0.36\;^{\circ}C\;and\;-0.5\;^{\circ}C,\;-0.46\;^{\circ}C$ respectively, however, the thermal differences of both sides LI4 and ST25 were not changed for 10 min. 3. In acupuncture stimulation of both sides LI4, the time dependent changes of ST25 were $-0.13\;^{\circ}C,\;-0.06\;^{\circ}C$, and the thermal differences of both sides ST25 were reduced, but not changed significantly. In acupuncture stimulation of right side LI4, the time dependent changes of LI4 were $-0.1\;^{\circ}C,\;-0.32\;^{\circ}C$ respectively, and the thermal differences of both sides LI4 were increased more than control, but not significantly. Also, that of ST25 were changed by $-0.69\;^{\circ}C,\;-0.63\;^{\circ}C$ respectively, but not significantly. 4. In acupuncture stimulation group, it was classified following the thermal differences of both sides LI4 and ST25, and the effects of acupuncture were observed by changes of classification. The acupuncture of both sides LI4 results in temperature of the left side ST25 to be high after acupuncture. The acupuncture of right side LI4 results in increased ratio of the left side higher than right LI4. The above results indicates that D. I. T. I. was a useful method to observe follow-up the effects and changes by acupuncture stimulation on objective evaluation of phenomenon for the meridian system. Thus, acupuncture on LI4 affects to thermal changes of ST25 and LI4, but exact examination of thermal changes on ST25 will have to be.

• Korean Chemical Engineering Research
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• v.44 no.5
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• pp.535-539
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• 2006

Effects of alkaline additives on the $CO_2$ removal reaction have been investigated by a thermogravimetric analyzer. $Li_2ZrO_3$ was synthesized by soild reaction of $ZrO_2$ with $Li_2CO_3$ and then alkali chemicals were added to the synthesized $Li_2ZrO_3$ and then heat treatment was carried out. Addition of alkali chemicals enhanced the reactivity of $Li_2ZrO_3$ with the following order; $K_2CO_3>NaCl>LiCl>Na_2CO_3$, which were resulted from the formation of partially melted $Li_2CO_3$. SEM photographs showed the presence of melted state and the XRD results showed that the chemical states of added salts were not changed. Addition of NaCl caused the induction time of about 60 min at the initial reaction stage and the addition of $Na_2CO_3$ inhibited the decomposition of $Li_2CO_3$ at about $700{\sim}750^{\circ}C$.

• The Journal of Korean Medicine
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• v.30 no.3
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• pp.70-78
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• 2009

Objectives : This study was aimed at examining the effects of the application of EA (electroacupuncture) at GV20 and LI4 in the early cerebral ischemia on the size of cerebral infarction, COX-2 and IL-6. Methods : For this experiment, 21, six-week-old male S-D (Sprague - Dawley) rats weighting 160g to 200g were selected and randomly classified into 3 groups, seven rats in each group. Brain ischemia was simulated using a modified Koizumi method which was performed on each rat. In the GV20 group, the GV20 of the SD rats was stimulated for thirty minutes with acupunctural electrode low frequency stimulator five hours after inducement of ischemia. For the LI4 group, the LI4 was stimulated as above, while for the Ischemia group, no stimulation was applied. Twenty-four hours after the experiment, stained cerebral tissues were examined and an immuno-histological test was done to examine inflammatory reaction Results : Out of the three groups, the LI4 group showed the smallest size of cerebral infarction and the Ischemia group showed the highest COX-2 (cyclooxygenase-2) expression value in the cortex of the cerebrum. In addition, the LI4 group showed the lowest COX-2 expression value in unknown putamen out of the three groups. Conclusions : We infer that EA, applied at LI4 and GV20 in early ischemia, is effective in delaying the expression of IL-6 (interleukin-6) and COX-2, the inflammatory agents manifested from stroke. In addition, application at LI4, rather than GV20, can lower the expression value of the inflammatory agents. Further, EA can be an effective way to block early inflammatory reaction in stroke.

• Journal of Radiation Protection and Research
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• v.22 no.3
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• pp.135-141
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• 1997

The study of anneal characteristics is important for TL dosimeter to reuse. To obtain the annealing condition of the recently developed, new TL dosimeter, LiF:Mg,Cu,Na,Si Teflon Tills in a disk type (diameter 4.5 mm, thickness about $90mg/cm^2$), we studied for pre-irradiation annealing, readout procedure and post-readout annealing, in order. The gamma irradiations were carried out with a $^{60}Co$, dose of 0.1 Gy. We have used the method that observe the variation of thermoluminescent(TL) intensity of these Teflon TLDs over repeated cycles by changing both anneal temperature and anneal time with the TLD reader and the oven. There is a 5% loss in sensitivity over the ten repeated readouts by the annealing condition:pre-irradiation annealing at $80^{\circ}C$ for one hour, readout to $280^{\circ}C$ and post-readout annealing at $270^{\circ}C$ for 20 seconds.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37 no.8C
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• pp.697-702
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• 2012

In 2011, C.-T. Li et al. proposed a secure user authentication scheme, which is an improvement over Kim et al.'s scheme to resolve several security flaws such as off-line password guessing attack and masquerading attack. C.-T. Li et al. claimed that their scheme prevents smart card security related attacks. Moreover, it provides mutual authentication and session key establishment. However, we found that their scheme is vulnerable to password guessing attack through password change phase, smart card forgery attack and stolen verifier attack. Moreover, C.-T. Li et al.'s scheme is not secure against password guessing attack as they claimed. In this paper, we also point out that their scheme is not practical to use.

• Applied Chemistry for Engineering
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• v.16 no.4
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• pp.507-512
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• 2005

When carbon electrode is used as an anode in Li ion battery, passivation film forms on the electrode surface during the initial charge process due to so called Solid-Electrolyte Interphase (SEI). The passivation film formed by solvent decomposition during the initial charge process affects charge/discharge capacity. In this paper, 1 M $LiPF_6,EC:DEC$ (1 : 1, volume ratio) electrolyte with $Li_2CO_3$, at various temperatures, the electrochemical characteristics of passivation film formed on Kawasaki Mesophase Fine Carbon electrode surface were investigated by using chronopotentiometry, cyclic voltammetry, and impedance spectroscopy. Experimental observations indicated that as solvent decomposition occurred, the decomposition voltage was strongly dependent on ionic conductivity, which was low in the process at low temperature. The impedance of passivation film formed during the initial charge process, were dependent on the temperature.

• Korean Journal of Acupuncture
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• v.18 no.1
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• pp.95-104
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• 2001

The pain was induced on upper and lower incisor of the rat based on the theory of 'connections of upper incisor pain with stomach meridian and lower incisor pain with large intestine meridian'. Such acupoints as ST36 and LI4 were used for alleviation of upper and lower incisor pain. The digastric myogram (dEMG) was utilized for the pain measurement. The upper incisor pain was gradually decreased during ST36 stimulation and significant differences were observed at 20 and 25 minute point during 60 minutes study. The upper incisor pain was gradually decreased during LI4 acupuncture and 20 minute was the only point that showed a significant difference. The alleviation of lower incisor pain was not obvious during the ST36 acupuncture. The lower incisor pain was gradually decreased during LI4 stimulation with significant differences at 15, 20 and 40 minute point. In conclusion, the upper incisor pain was relieved with ST36 and LI4 acupuncture while LI4 was effective on the lower incisor pain alleviation based on the theory of 'connections of upper incisor pain with stomach meridian and lower incisor pain with large intestine meridian'.

• Journal of Acupuncture Research
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• v.22 no.4
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• pp.131-141
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• 2005

Objectives : Saam acupuncture has evident principles of prescription based on acupuncture tonification and purgation of Nan-gyeong but many prescriptions of Saam acupuncture are not typical patterns. This paper studies principles of prescriptions of the king fire and the premier fire. Methods : Through investigation of many medical documents concerning king fire and the premier fire, the author explained of physiological and pathological principle of king and the premier fire, also explained of interacting mechanism through five element. And The theoretical authorities of analysis are Nan-gyeong, works of Joo dan-gye and Li dong-won. Results & Conclusion : 1. The sufficiency and the control of the water is the key to treat the disease by fire. Considering the attack and the treatment of disease, heart and liver give rise to fire in its early stage and kidney and lung are the key to treatment. 2. Consequently the pathology of the disease from fire is corresponding to the theory- Yang Sufficient, Yin Deficient- of Joo dan-gye. It seems that the theory of Joo dan-gye influenced on the medical theory of Saam Acupuncture. 3. On that account I believe that the study of medical theories of the Geum and Won Dynasty that various medical theories had appeared is very available for Saam Acupuncture. At present global warming is accelerating because environmental pollution has been increasing. Therefore the damage of fire to human body will be more and more severe and extensive. Because in the future medical plants will not be free from environmental pollution, acupuncture will be very confidential treatment.