• Asian Pacific Journal of Cancer Prevention
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• v.14 no.2
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• pp.935-940
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• 2013

Background: To evaluate the diagnostic utility of conventional ultrasonography and real time ultrasound elastography in differentiating degenerating cystic thyroid nodules mimicking malignancy from papillary thyroid carcinoma. Methods: We retrospectively analyzed conventional ultrasonographic and elastographic characteristics of 19 degenerating cystic thyroid nodules mimicking malignancy in 19 patients, with 30 surgically confirmed PTCs as controls. Based on size, the nodules had been grouped into less than 10mm (group A) and greater than 10 mm (group B). We evaluated conventional parameters and elasticity pattern. Color-scaled elastograms were graded as to stiffness of nodules using an elasticity pattern from I (soft) to IV (stiff). Results: Degenerating cystic thyroid nodules were similar to PTCs in conventional ultrasonographic findings, but the former frequently showed oval to round in shape (group A, 69.2% vs 18.8%, P=0.017; group B, 66.7% vs 7.14%, P=0.017) and punctuate hyperechoic foci (group A, 61.5% vs 0, P<0.001; group B, 50% vs 0, P<0.001). On real time ultrasound elastography, 7 of 13 degenerating cystic thyroid nodules in group A were pattern I, 5 were pattern II, 1 was pattern III. One degenerating cystic thyroid nodule in group B was pattern II, 5 were pattern III. The area under the curve for elastography was 0.98 in group A (sensitivity 92.3%, specificity 100%, P = 0.002), and 0.88 in group B (sensitivity 16.7%, specificity 100%, P = 0.014). Conclusions: As a dependable imaging technique, elastography helps increase the performance in differential diagnosis of degenerating cystic thyroid nodule and malignancy.

• Journal for History of Mathematics
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• v.27 no.3
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• pp.155-164
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• 2014

Tianyuanshu and Zengcheng Kaifangfa introduced in the Song-Yuan dynasties and their contribution to the theory of equations are one of the most important achievements in the history of Chinese mathematics. Furthermore, they became the most fundamental subject in the history of East Asian mathematics as well. The operations, or the mathematical structure of polynomials have been overlooked by traditional mathematics books. Investigation of GuIlJib (九一集) of Joseon mathematician Hong JeongHa reveals that Hong's approach to polynomials is highly structural. For the expansion of $\prod_{k=11}^{n}(x+a_k)$, Hong invented a new method which we name Hong JeongHa's synthetic expansion. Using this, he reveals that the processes in Zhengcheng Kaifangfa is not synthetic division but synthetic expansion.

• International conference on construction engineering and project management
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• 2020.12a
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• pp.41-49
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• 2020

Concurrent construction offers considerable improvement for shorten the project duration of its production process. Therefore, standardized concurrent construction is widely applied in building construction projects. However, resources planning for standardized concurrent construction project is manually developed by construction manager. This practice is not effective since it is time-consuming and error-prone for managers to identify all project-specific information, distinguish different activity-resource types, interpret these types and analyze how they affect resource allocated on an ad hoc basis. Therefore, this research investigates the opportunity for leveraging activity modeling to enable automated resource planning for standardized concurrent construction during project development, with identifying the characteristics of construction activities under standardized concurrent planning and determining the activity-resources types that affects resource planning. Both will function as a basis for modeling these construction activities in a computer-interpretable manner and for automation in resource planning.

• Journal of the Korean Society of Food Culture
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• v.35 no.5
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• pp.426-439
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• 2020

This study surveyed Chinese elderly consumers to determine their purchasing behavior, importance, and satisfaction with HMR products in China. Three hundred and seventy people were surveyed: 184 males and 186 females aged 55 to 70 years. Two hundred and sixty-seven (72.25%) of the surveyed consumers had an average monthly income of 6,000 yuan or less, and 313 (84.9%) responded that they spend 3000 yuan or less on groceries per month. Three hundred and forty-eight (94.1%) showed a high interest in health management. Regarding the frequency of purchasing HMR products, most responded that they purchased HMR products more than once or twice a week, with a single purchase of 100 yuan or less for each purchase. The respondents preferred 2 or 3 serving packagings in a refrigerated form. For all forms of products, those made as in-house meals, outdoor meals, as a snack or night snack, for serving guests, for trips, camping, and on-the-go products, the participants mostly responded that they frequently purchased the product. When purchasing HMR products, the importance of hygiene, convenience in purchase accessibility, the freshness of ingredients, and an indication of the nutritional content were considered as a high rank. After purchase, the satisfaction of SNS and mobile application advertisements and promotions, amount per serving, take out convenience, and new menu were considered low-rank. The IPA results showed that marking the origin of the ingredients and new menu are areas needing improvement. The study results may be used as base data for developing elderly friendly HMR products and establishing its marketing strategies.

• Industry Promotion Research
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• v.5 no.1
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• pp.157-164
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• 2020

After the Qing Dynasty overthrow of the Ming dynasty, this is far-reaching influenced on the Ming Dynasty's Sovereign state of the Joseon dynasty. Not only did regulations prohibit the entry into various books published by the Qing Dynasty, In addition, the "Northern Expedition" of Song Siyeo put forward the mainstream political proposal of the Northern Expedition and Qing Dynasty.Even in this context, Representatives of scholars such as Hong Daeyong, Bak Jega, Kim Jeonghui on the Joseon dynasty peninsula at the time, put forward the idea of "Learning from Central Plains" through several visits to Shuntian Prefecture (now Beijing), And gradually formed the well-known Silhak (Practical Learning) ideological of "Bukhak, (Northern Learning)" in the Joseon dynasty history. the Joseon dynasty Silhak ideological scholar of Kim Jeonghui also was under the influence of the Weng Fanggang and Ruan yuan other famous Qing Dynasty Textual scholar, Fruitful achievements in Chinese Classical Studies Epigraphy, Calligraphy.He founded the "Chusa-che" style of calligraphy Chusa, the "Chusa-che" styled is although born out of the clerical script, but more composition and See also asymmetrical in harmony, Strong and vigorous brush strokes, Every word vibrant, Make it a master of gold stone calligraphy in the Joseon Dynasty.This study based on some records of Kim Jeonghui's visited to Shuntian Prefecture(now Beijing), this article examines the academic activities of seeking truth to facts in Korea and the Qing Dynasty at the time, and the impact on these activities on calligraphy and painting in the Joseon Dynasty.

• Journal of the Korean Mathematical Society
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• v.46 no.6
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• pp.1139-1150
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• 2009

We obtain necessary and sufficient conditions for $2{\tims}2$ block operator valued matrices to be Moore-Penrose (MP) invertible and give new representations of such MP inverses in terms of the individual blocks.

• Proceedings of the Korean Society of Potoscience Conference
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• spring
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• pp.7-7
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• 1999

• Kyungpook Mathematical Journal
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• v.61 no.3
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• pp.495-512
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• 2021

We study the value distribution theory of L-functions and completely resolve a question from Yang [10]. This question is related to L-functions sharing three finite values with meromorphic functions. The main result in this paper extends corresponding results from Li [10].

• Asian Pacific Journal of Cancer Prevention
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• v.16 no.7
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• pp.2591-2600
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• 2015

Breast cancer is the most common cancer worldwide among women and the second most common cancer. Approximately 15-23% of breast cancers over-express human epidermal growth factor receptor2 (HER2), a 185-kDa transmembrane tyrosine kinase, which is mainly found at the cell surface of tumor cells. HER2-positive breast cancer, featuring amplification of HER2/neu and negative expression of ER and PR, has the three following characteristics: rapid tumor growth, lower survival rate, and better response to adjuvant therapies. Clinically, it is notable for its role in a pathogenesis that is associated with increased disease recurrence and acts as a worse prognosis. At the same time, it represents a good target for anti-cancer immunotherapy despite the prevalence of drug resistance. New treatments are a major topic of research, and a brighter future can be expected. This review discusses the role of HER2 in breast cancer, therapeutic modalities available and prognostic factors.

• Journal for History of Mathematics
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• v.20 no.4
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• pp.1-21
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• 2007

We investigate the Gou Gu Shu(句股術) in Hong Jung Ha's Gu Il Jib(九一集) and Cho Tae Gu's Ju Su Gwan Gyun(籌書管見) published in the early 18th century. Using a structural approach and Tien Yuan Shu(天元術), Hong has obtained the most advanced results on the subject in Asia. Using Cho's result influenced by the western mathematics introduced in the middle of the 17th century, we study a process of a theoretical approach in Chosun mathematics in the period.