• Journal of the Korean Society of Safety
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• v.6 no.4
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• pp.66-72
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• 1991

Spontaneous ignition characteristics were observed by performing experiments for granulated activated carbon at constant ambient temperature in an oven. As the results of the experiments, the critical spontaneous ignition temperature of sample for large, intermediate and small vessels was 158.5$^{\circ}C$ , 165.5$^{\circ}C$ and 174.5$^{\circ}C$, respectively. It was found that the critical spontaneous ignition temperature decreased and the ignition induction time increased as the sample vessel size increased. Apparent activation energy of the sample calculated from the Frank= kamenetskii's thermal ignition theory was 17.81＊10$^3$J/mol.

• Phonetics and Speech Sciences
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• v.8 no.1
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• pp.45-51
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• 2016

This study examined the deletion of onset consonant in the word-internal structure in spontaneous Seoul Korean speech. It used the dataset of speakers in their 20s extracted from the Korean Corpus of Spontaneous Speech (Yun et al., 2015). The proportion of deletion of word-internal onset consonants was analyzed using the linear mixed-effects regression model. The factors that promoted the deletion of onsets were primarily the types of consonants and their phonetic contexts. The results showed that onset deletion was more likely to occur for a lenis velar stop [k] than the other consonants, and in the phonetic contexts, when the preceding vowel was a low central vowel [a]. Moreover, some speakers tended to more frequently delete onset consonants (e.g., [k] and [n]) than other speakers, which reflected individual differences. This study implies that word-internal onsets undergo a process of gradient reduction within individuals' articulatory strategies.

• Journal of Korean Foot and Ankle Society
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• v.20 no.1
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• pp.46-49
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• 2016

Spontaneous rupture of the extensor tendon has been reported in association with predisposing inflammatory conditions including rheumatoid arthritis, diabetes, trauma, tophaceous gout, and steroid injection. The authors experienced a case of spontaneous rupture of the extensor digitorum longus tendons caused by an osteophyte of the tarsometatarsal joint in a patient with rheumatoid arthritis. The authors stress that aggressive treatment including surgery could be considered for prevention of spontaneous tendon rupture in a patient with predisposing conditions despite an asymptomatic spur.

• Journal of Chest Surgery
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• v.22 no.6
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• pp.1044-1048
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• 1989

In this study, 26 cases of bilateral spontaneous pneumothorax experienced at the department of thoracic and cardiovascular surgery, Chungnam National University Hospital during from 1985 to August 1989 were analyzed retrospectively. The results were as follows; 1. The incidence of bilateral spontaneous pneumothorax was 13.5 % and sex ratio was 7.7:1 with male preponderance. 2. Among the nonsimultaneously occurring cases of bilateral pneumothorax, 12 patients [75 %] were developed at contralateral side within a year. 3. The most patients [65.4%] belonged to the age group between 15 and 25 year-old, and among 57 male patients suffered spontaneous pneumothorax in the same age group, 16 cases[28%] developed bilaterally. 4. The etiologic factors were as follows; blebs or bullae; 65.4 %, tuberculosis; 15.4 %, unknown; 19.2 %. 5. In the method of treatment, 15 patients were treated by closed tube thoracotomy and underwater-seal drainage only, 10 patients were treated by open thoracotomy. One patient died of respiratory failure due to severe destructed lung.

• Journal of Chest Surgery
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• v.44 no.3
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• pp.253-256
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• 2011

Spontaneous pneumothorax is a common clinical problem in emergency care. However, the overall incidences of primary spontaneous pneumothorax has been reported from as low as 1.4% to 7.6%. The clinical findings of simultaneous bilateral spontaneous pneumothorax can be variable. Clinical presentation is variable, ranging from mild dyspnea to tension pneumothorax. Bilateral tension pneumothorax can defined as cases where no tracheal deviation is detected in chest X-ray, and symptoms may be equal bilaterally. Herein, we present a case with simultaneous bilateral tension pneumothorax, severely deteriorated (i.e. with loss of consciousness, cyanosis, and hemodynamically unstable), that was successfully treated with immediate large-size needle decompression.

• The Korean Journal of Pain
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• v.12 no.1
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• pp.157-161
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• 1999

We report a patient with spontaneous intracranial hypotension. In addition to the cardinal feature of a postural headache and a low CSF pressure, the patient also had subdural hematoma demonstrated by brain MRI. Radionuclide cisternography revealed a CSF leakage in the intracranium. CSF leakage from spinal meningeal defects may be the most common cause of this syndrome. The headache is a consequence of the low CSF pressure producing displacement of pain-sensitive structures. Methods of treatment are identical to those for post-dural puncture headaches. We experienced a patient with spontaneous intracranial hypotension developed in the intracranium who was successfully managed with a cervical blood patch.

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.5 no.1
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• pp.62-78
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• 1987

인체의 신경조직에서 정보를 전달하기 위해서 발생하는 Signal인 spontaneous firing의 origin을 조사하기 위해서 Hodgkin-Huxley의 수학적 모델을 기초로 하여 Simulation을 하였다. 그 모델의 Parameter인 Stimulus current를 zero로 함으로써 생리학적으로는 stimulus없이 어떤 특정한 근육근 등에서 발생되는 spontaneous firing의 경우가 되었고 또한 physical meaning들을 포함하고 있는 parameter들의 상호 독립적 상태를 초래하여 그 firing의 origin을 연구할수 있게 되었다. 이 simulation을 통하여 얻어진 수확들은 origin에 대한 조사 연구뿐만 아니라 많은 새로운 사실의 발견에도 존재한다. 그 예로서는 이 simulation이 stimulus 없이 spontaneous firing을 얻은 최초가 되며 이 분야에 명성있는 학자들이 simulation을 통해서는 매우 제한된 수의 firing만을 얻을수 있다고 단언했으나 그 반증이 여기에서 입증되었고 leakage conductance의 중요성을 예측하게 한다. 특히 leakage potential이 firing의 수를 조정할수 있다는 것은 특이한 발견이다.

• Journal of Korean Neurosurgical Society
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• v.47 no.1
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• pp.48-50
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• 2010

Spontaneous intracranial hypotension is often idiopathic. We report on a patient presenting with symptomatic intracranial hypotension and pain radiating to the right leg caused by a transdurallumbar disc herniation. Magnetic resonance (MR) imaging of the brain revealed classic signs of intracranial hypotension, and an additional spinal MR confirmed a lumbar transdural herniated disc as the cause. The patient was treated with a partial hemilaminectomy and discectomy. We were able to find the source of cerebrospinal fluid leak, and packed it with epidural glue and gelfoam. Postoperatively, the patient's headache and log radiating pain resolved and there-was no neurological deficit. Thus, in this case, lumbar disc herniation may have been a cause of spontaneous intracranial hypotension.

• The Journal of Korean Obstetrics and Gynecology
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• v.31 no.2
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• pp.95-102
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• 2018

Objectives: The purpose of this paper is to report the effects of herbal medicine on spontaneous pregnancy with premature ovarian failure. Methods: The 28-year-old patient who was diagnosed premature ovarian failure was treated with herbal medicine (Hyangbujapalmul-tang-gagam), acupuncture and moxibustion. Results: After the treatment, the symptoms of premature ovarian failure such as hot flushes, sweats were improved. The patient recovered menstruation and achieved spontaneous pregnancy. Conclusions: This case shows that Korean medical treatment including herbal medicine has effect on treating infertile female with premature ovarian failure.

• Tuberculosis and Respiratory Diseases
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• v.78 no.4
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• pp.360-362
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• 2015

Spontaneous pneumomediastinum (PM) is an uncommon condition in which free air enters the mediastinum. This usually occurs either through esophageal tears after vigorous vomiting, or after alveolar rupture subsequent to a rapid increase in intra-alveolar pressure. Spontaneous PM is a rare entity in anorexia nervosa (AN) and self-induced vomiting is often the cause of PM in patients with AN. We experienced a case of spontaneous PM in an anorexic adolescent, in whom vomiting was not the cause of PM.