• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.787-790
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• 2015

Recently, M2M (Machine to Machine) communication is possible the development of MTC (Machine Type Communication) devices becomes active. MCT devices in the form of home appliances have a low power consumption, low cost, short-range wireless communication in wireless home network. For purpose, MTC devices based on IEEE 802.15.4/Zigbee are composed in the form of cluster-tree topology, which consists of one PAN (Personal Area Network), one or other router and end of nodes. It happens that transmission delay, packet drop, and lacking data resulted from collision originated by a competition for allocating channels among MTC devices that greatly increased. At last performance of entire network can be degradated. This paper proposes that the beacon frame-based grouping algorithm using multiple channels in a MTC devices in the presence of wireless home network interference. The proposed algorithm decreases the transmission delay, dropped packet and throughput is more increase, so the proposal algorithm is more efficient than the IEEE 802.15.4/ Zigbee standard.

• The Korea Journal of Herbology
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• v.26 no.4
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• pp.75-81
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• 2011

Objectives : Magnoliae officinalis Cortex (MOC) has been used in traditional medicine for digestive diseases in Korea, China and Japan. However, Machili thunbergii Cortex (MTC) also has been used as a substitute of MOC in Korea sometimes. Thus, this study was carried out to investigate and compare the effects of MOC and MTC on intestinal motility of isolated small intestinal segments from ICR mouse. Methods : Changes in motility were recorded via isometric transducers connected to a data acquisition system and amplitude, frequency and area under the curve (AUC) of intestinal spontaneous phasic contraction were compared. Results : The MOC extracts ($1{\sim}{\mu}g/mL$) dose-dependently decreased both amplitudes and frequencies of the spontaneous phasic contraction, but not AUC. However, high concentration of MOC (100 ${\mu}g$/mL) evoked tonic contraction. And it was not inhibited by tetrodotoxin, a sodium channel blocker, and nifedipine, a L-type $Ca^{2+}$ channel antagonist. These results suggested that MOC (100 ${\mu}g$/mL)-induced tonic contraction is not mediated by nerve or L-type $Ca^{2+}$ channel. On the other hand, the MTC extracts dose-dependently inhibited amplitude and AUC, but not the frequency. Conclusions : Although both MOC and MTC affected intestinal motility, MOC is more effective on intestinal motility than MTC. And MOC has been used as a traditional medicine for a long time but not MTC. Thus, we suggested that MTC should not be used in Korea as a substitute of MOC and MOC might be useful traditional medicine for gastrointestinal disease. The mechanism of MOC is still remained to elucidate.

• Korean Journal of Head & Neck Oncology
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• v.28 no.2
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• pp.149-152
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• 2012

Paraganglioma of the thyroid is a neuroendocrine tumor originating from the neural crest. To our knowledge, only 32 cases of thyroid paraganglioma(TP) have been reported to date. TP is difficult to distinguish from medullary thyroid cancer(MTC), hence correct diagnosis is seldom obtained preoperatively. Although immunohistochemistry is helpful for confirmation of TP, these markers are not specific for differential diagnosis between TP and MTC. Therefore, an index of suspicion is important when encountered with MTC with unusual features, or given pathology with neuroendocrine features and unusual immunohistochemical findings. The authors report a case of TP misdiagnosed as MTC at preoperative work-up and intraoperative frozen section analysis, with a review of the literature. The case depicts various immunohistochemical characteristics of the tumor.

• Journal of the Korean Graphic Arts Communication Society
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• v.20 no.2
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• pp.131-140
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• 2002

Chemically amplified deep UV(CA-DUV) resists are typically based on a combination of an acid labile polymer and a photoacid generator(PAG) but acid amplification type photoresist is formulated by addition of the acid amplifiers to chemically amplified resist system(CAPs). We developed acid amplifiers base on cyclohexanediol such as 1-methacryloyloxy-4-tosyloxy cyclohexane(MTC) and poly(MTC$_{10}$-co-tBMA$_{90}$)(P-1) to enhance photosensitivity. P-1 is a copolymer of tert-butyl methacrylate and MTC as a positive working photoresist based on polymeric acid amplifier in order to enhance photosensitivity and simplify the process of fomulating a photoresist. P-1 exhibited 2X higher photosensitivity compared with PtBMA. The acid amplifiers showed reasonable thermal stability for resist processing temperature and higher photosensitivity compared with chemically amplified resist.

• Asian Pacific Journal of Cancer Prevention
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• v.17 no.sup3
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• pp.119-123
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• 2016

Thyroid cancer, the most common endocrine neoplasia, consists of four main types of carcinomas: papillary, follicular, and anaplastic, all with thyroid follicular origin, and medullary thyroid cancer (MTC) related to para-follicular cells. Cronic diseases such as diverse cancers may be associated with cachexia, especially at advanced stage. Cancer-induced cachexia is associated with diminished quality of life, functional performance, reduced response to antitumor therapy, and increased morbidity and mortality. Myostatin (Mst) is one of the outstanding molecules in the skeletal muscle loss process in cancer and it may be released by both skeletal muscle and cachexia-inducing tumors. Recently changes in serum levels of Mst have been identified as an important factor of cancer-induced cachexia. The goal of this study was to assessserum Mst levels in MTC patients. In this descriptive and case-control study, 90 participants were selected, comprising 45 MTC patients (20 males, $29{\pm}13.9years$, 25 females, $29{\pm}14.5years$) and 45 control individuals (25 males, $23.1{\pm}11.6years$, 20 females, $31.5{\pm}14.4years$). Serum Mst was determined using an ELISA kit and body mass index (BMI) was calculated by weight and height measurements. The Kolmogorov Simonov test showed a normal distribution for log transformed Mst serum levels in both case and control groups. Geometric means were 5.9 and 8.2 ng/ml respectively, and a significant difference was found according to the independent t-test results (P<0.01). There was also a significant difference mean of Mst between females in control and MTC groups, but not for the males. Pearson correlation test showed no correlation between age and BMI with Mst serum levels. The findings of this study support the hypothesis that Mst serum levels may have a potential ability for early diagnosis of cachexia in MTC patients, especially in females.

• Journal of Embryo Transfer
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• v.25 no.4
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• pp.259-262
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• 2010

Optimization of the preimplantation mammalian embryo culture condition was widely focused on refining medium composition under the name of chemically defined media. However, recent research revealed that the alteration of physical environment can be a crucial factor to a successful embryo development. In this study, under the same embryo density, a novel culture device named oil-free micro tube culture (MTC) system was evaluated using porcine parthenogenetic embryos. The activated oocytes were placed into the 0.2 ml thin-wall flat cap PCR tube and cultured to the blastocyst stage. As a preliminary step, embryo density and culture medium volume were optimized under a standard drop culture system. The optimal embryo density range for in vitro culture was 0.5 embryos per ${\mu}l$ in $20\;{\mu}l$ drop (20.5%) and 1.0 embryos per ${\mu}l$ in $10\;{\mu}l$ drop (20.6%). Based on these results, we compared drop culture system and 'MTC' system in terms of the developmental rate to the blastocyst stage. In $20\;{\mu}l$ medium volume, the 'MTC' system showed similar blastocyst formation rate when compared with drop culture system (20.2% versus 20.5%, respectively) while the 'MTC' system showed lower blastocyst formation rate than drop culture system in $10\;{\mu}l$ one (12.7% versus 20.0%, respectively). Therefore the $20\;{\mu}l$ MTC system may be an alternative incubation system for short-distance embryo transport without carrying the $CO_2$ incubator and this provides novel embryo culture device to clinical veterinary embryologists.

• Journal of KIISE
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• v.42 no.1
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• pp.15-22
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• 2015

In this paper, we present a case study for a drug repositioning simulation based on distributed supercomputing technology that requires highly efficient processing of large-scale computations. Drug repositioning is the application of known drugs and compounds to new indications (i.e., new diseases), and this process requires efficient processing of a large number of docking tasks with relatively short per-task execution times. This mechanism shows the main characteristics of a Many-Task Computing (MTC) application, and as a representative case of MTC applications, we have applied a drug repositioning simulation in our HTCaaS system which can leverage distributed supercomputing infrastructure, and show that efficient task dispatching, dynamic resource allocation and load balancing, reliability, and seamless integration of multiple computing resources are crucial to support these challenging scientific applications.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.11a
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• pp.15-20
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• 1996

We present the result of physical studies for three integral-type burnable absorbers of gadolinia, erbia and IFBA, in the hexagonal fuel assembly. The analysis of nuclear characteristics for gadolinia and IFBA cases shows that the spectrum hardening of hexagonal fuel assembly compared to rectangular one leads to smaller reactivity hold-down worth(RHW) and less change of MTC in the negative direction per insertion of one burnable absorber rod. Erbia case, on the other hand, exhibits reversed trend in RHW and MTC due to the enhanced absorption of large resonance of Erbium at 0.5 eV It turns out to be that Erbia performs best in terms of minimizing the peak pin power and maintaining as more negative MTC as practically attainable during the entire operational phase, and IFBA provides the least residual reactivity penalty at EOC. Therefore, we take Erbium as the suitable burnable absorber and provide optimal designs of 60, 120, 180, 240 and 300 erbia-shimmed hexagonal fuel assemblies with regard to minimizing the peak pin power.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06b
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• pp.112-113
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• 2012

본 논문에서는 실전적인 전투 훈련을 체험할 수 있는 육군 과학화 전투 훈련단의 시스템을 상용 이동통신망(LTE)을 기반으로 한 MTC(장비 또는 기계간의 통신)에 적용하여, 저비용이면서도 신뢰성있는 체계 모델을 제안하며 이를 통해 공군의 각 기지/부대 별 특성에 맞는 실전적 기지방호 훈련이 가능하게 되어 실질적인 전투 능력을 향상시킬 수 있을 것으로 기대한다.

• KIPS Transactions on Software and Data Engineering
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• v.3 no.11
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• pp.487-494
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• 2014

This paper focuses on an advanced congestion control scheme for M2M(Machine-to-Machine) communications in 3GPP LTE-A standard. A large number of MTC(Machine-type-Communication) devices try to access to LTE-A networks and send data to the networks all at once. In this characteristics, M2M communications will bring the serious network congestion problems into LTE-A cellular networks. To solve this critical problem, a congestion control mechanism will be required and it has been studied since Rel-10 LTE-A systems based on backoff mechanism for mobility management and session management. In this paper, we briefly introduce the main concept and operation about the congestion control scheme in 3GPP LTE-A standard. Also, simulation results for the basic congestion control and advanced congestion control scheme in MTC communication environment are provided and the improvement direction is considered in future 3GPP LTE-A standard.