• Title/Summary/Keyword: Positivity

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Acute unilateral isolated abducens nerve palsy associated with anti-GM1 immunoglobulin M antibody

  • Son, Hyoshin;Kim, Ahwon;Hong, Sang Bin;Koo, Dae Lim
    • Annals of Clinical Neurophysiology
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    • v.21 no.2
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    • pp.105-107
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    • 2019
  • Acute ophthalmoparesis that includes the oculomotor, trochlear, or abducens nerve may occur as an initial presentation of Miller Fisher syndrome (MFS). The symptoms of MFS or variant forms of Guillain-Barre syndrome are pathogenically related to anti-GQ1b antibodies. We report a case of a 36-year-old man with unilateral isolated abducens nerve palsy associated with anti-GM1 antibody. To the best of our knowledge, this is the first report of unilateral isolated abducens nerve palsy with positivity for anti-GM1 immunoglobulin M antibody.

Urban History and 'Geohistory' of E. W. Soja

  • Hong, Yong-Jin
    • Journal of East-Asian Urban History
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    • v.2 no.1
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    • pp.163-190
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    • 2020
  • This paper aims to introduce and understand critically the work of Edward Soja, mainly the First part of the which develops his own concepts, such as 'synekism', 'trialectics of space', 'regionality' and 'geohistory'. Most of all, in explaining Geohistory, he emphasizes three 'Urban revolutions': First Urban revolutions in Jericho and ÇatalHüyük, which shows first synekism as proto urban society, Second in Ur and other Sumerian cities where appeared a concentrated power of central government and its transcendental ideologies, and Third in Manchester and in Chicago, typical capitalist cities. These three urban revolutions don't correspond to the established historical periodization. In order to understand these revolutions, it is necessary to comprehend the concept of 'machine' of G. Deleuze and F. Guattari, inspired, in fact, by Lewis Mumford - Primitive Territorial machine, Barbaric Despotic machine, and Civilized Capitalist machine. However, these periodization and concepts of E. Soja have to be applied very cautiously in accordance with concrete historical sources, avoiding theoretical distortion on positivity of historical facts.

Analysis on Review Data of Restaurants in Google Maps through Text Mining: Focusing on Sentiment Analysis

  • Shin, Bee;Ryu, Sohee;Kim, Yongjun;Kim, Dongwhan
    • Journal of Multimedia Information System
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    • v.9 no.1
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    • pp.61-68
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    • 2022
  • The importance of online reviews is prevalent as more people access goods or places online and make decisions to visit or purchase. However, such reviews are generally provided by short sentences or mere star ratings; failing to provide a general overview of customer preferences and decision factors. This study explored and broke down restaurant reviews found on Google Maps. After collecting and analyzing 5,427 reviews, we vectorized the importance of words using the TF-IDF. We used a random forest machine learning algorithm to calculate the coefficient of positivity and negativity of words used in reviews. As the result, we were able to build a dictionary of words for positive and negative sentiment using each word's coefficient. We classified words into four major evaluation categories and derived insights into sentiment in each criterion. We believe the dictionary of review words and analyzing the major evaluation categories can help prospective restaurant visitors to read between the lines on restaurant reviews found on the Web.

DYNAMICS OF A PREY-PREDATOR INTERACTION WITH HASSELL-VARLEY TYPE FUNCTIONAL RESPONSE AND HARVESTING OF PREY

  • BHATTACHARYYA, ANINDITA;MONDAL, ASHOK;PAL, A.K.;SINGH, NIKHITA
    • Journal of applied mathematics & informatics
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    • v.40 no.5_6
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    • pp.1199-1215
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    • 2022
  • This article aims to study the dynamical behaviours of a two species model in which non-selective harvesting of a prey-predator system by using a reasonable catch-rate function instead of usual catch-per-unit-effort hypothesis is used. A system of two ordinary differential equations(ODE's) has been proposed and analyzed with the predator functional response to prey density is considered as Hassell-Varley type functional responses to study the dynamics of the system. Positivity and boundedness of the system are studied. We have discussed the existence of different equilibrium points and stability of the system at these equilibrium points. We also analysed the system undergoes a Hopf-bifurcation around interior equilibrium point for a various parametric values which has very significant ecological impacts in this work. Computer simulation are carried out to validate our analytical findings. The biological implications of analytical and numerical findings are discussed critically.

ANALYSIS OF THE MITIGATION STRATEGIES FOR MARRIAGE DIVORCE: FROM MATHEMATICAL MODELING PERSPECTIVE

  • TESSEMA, HAILEYESUS;MENGISTU, YEHUALASHET;KASSA, ENDESHAW
    • Journal of applied mathematics & informatics
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    • v.40 no.5_6
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    • pp.857-871
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    • 2022
  • In this work, we formulated a mathematical model for divorce in marriage and extended in to an optimal control model. Firstly, we qualitatively established the model positivity and boundedness. Also we saw sensitivity analysis of the model and identified the positive and negative indices parameters. An optimal control model were developed by incorporating three time dependent control strategies (couple relationship education, reducing getting married too young & consulting separators to renew their marriage) on the deterministic model. The Pontryagin's maximum principle were used for the derivation of necessary conditions of the optimal control problem. Finally, with Newton's forward and backward sweep method numerical simulation were performed on optimality system by considering four integrated strategies. So that we reached to a result that using all three strategies simultaneously (the strategy D) is an optimal control in order to effectively control marriage divorce over a specified period of time. From this we conclude that, policymakers and stakeholders should use the indicated control strategy at a time in order to fight against Divorce in a population.

Diarrheagenic pathogens in calves with diarrhea in Chungcheongbuk-do, Korea, from 2018 to 2021

  • Kim, Ah Young;Lee, Seung-Hun
    • Korean Journal of Veterinary Service
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    • v.45 no.3
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    • pp.201-209
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    • 2022
  • An epidemiological study was conducted to investigate five diarrhea-causing pathogens (coronavirus, rotavirus, E. coli, Cryptosporidium, Giardia) using a rapid diagnostic kit in Hanwoo calves with diarrhea in Chungcheongbuk-do, Korea, from 2018 to 2021. A total of 22,417 fecal samples were collected from calves under 1 year of age; of those, 13,518 (60.3%) were positive for five bovine diarrhea antigens. The antigen positivity rates for rotavirus, coronavirus, E. coli, Giardia, and Cryptosporidium were 34.5%, 11.0%, 8.2%, 4.7%, and 2.0%, respectively. The prevalence of the five pathogens in calves was statistically higher in autumn and winter. The highest prevalence of the pathogens was observed in the under 1 month age group, and the incidence of diarrhea decreased with age. Rotavirus was a major pathogen in calves under 1 month of age, whereas the prevalence of E. coli increased with age. This study provides epidemiological evidence of the prevalence of calf diarrheal pathogens in Chungcheongbuk-do, Korea, which will facilitate early diagnosis and development of measures against calf diarrhea.

Isolated facial diplegia variant of Guillain-Barré syndrome with anti-GM1 IgG antibody

  • Jung, Jin Ho;Lee, Sukyoon;Seo, Jung Hwa;Bae, Jong Seok;Shin, Kyong Jin;Kim, Jong Kuk;Yoon, Byeol-A;Oh, Seong-il
    • Annals of Clinical Neurophysiology
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    • v.24 no.1
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    • pp.17-20
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    • 2022
  • Facial diplegia (FD) rarely occurs as a regional Guillain-Barré syndrome (GBS) variant. A 70-year-old male presented with bifacial weakness that had started on the left side and extended to the right after several days. He was then treated using steroids and gradually improved. Serum antiganglioside antibody testing revealed positivity for anti-GM1 IgG antibodies. FD can be idiopathic, but it is an uncommon GBS variant. The ganglioside antibody test may increase the possibility of diagnosing isolated FD.

A STUDY ON INVARIANT REGIONS, EXISTENCE AND UNIQUENESS OF THE GLOBAL SOLUTION FOR TRIDIAGONAL REACTION-DIFFUSION SYSTEMS

  • IQBAL M. BATIHA;NABILA BARROUK;ADEL OUANNAS;ABDULKARIM FARAH
    • Journal of applied mathematics & informatics
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    • v.41 no.4
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    • pp.893-906
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    • 2023
  • In this article, we are devoted to study the problem of the existence, uniqueness and positivity of the global solutions of the 3 × 3 reaction-diffusion systems with the total mass of the components with time. We also suppose that the nonlinear reaction term has a critical growth with respect to the gradient. The technique that we used to prove the global existence is the method of the compact semigroup.

RECENT DEVELOPMENTS IN DIFERENTIAL GEOMETRY AND MATHEMATICAL PHYSICS

  • Flaherty, F.J.
    • Bulletin of the Korean Mathematical Society
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    • v.24 no.1
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    • pp.31-37
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    • 1987
  • I want to focus on developments in the areas of general relativity and gauge theory. The topics to be considered are the singularity theorms of Hawking and Penrose, the positivity of mass, instantons on the four-dimensional sphere, and the string picture of quantum gravity. I should mention that I will not have time do discuss either classical mechanics or symplectic structures. This is especially unfortunate, because one of the roots of differential geometry is planted firmly in mechanics, Cf. [GS]. The French geometer Elie Cartan first formulated his invariant approach to geometry in a series of papers on affine connections and general relativity, Cf. [C]. Cartan was trying to recast the Newtonian theory of gravity in the same framework as Einstein's theory. From the historical perspective it is significant that Cartan found relativity a convenient framework for his ideas. As about the same time Hermann Weyl in troduced the idea of gauge theory into geometry for purposes much different than those for which it would ultimately prove successful, Cf. [W]. Weyl wanted to unify gravity with electromagnetism and though that a conformal structure would fulfill thel task but Einstein rebutted this approach.

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Adaptive Input-Output Linearization Technique of Interior Permanent Magnet Synchronous Motor with Specified Output Dynamic Performance

  • Kim, Kyeong-Hwa;Baik, In-Cheol;Moon, Gun-Woo;Lee, Dae-Sik;Youn, Myung-Joong
    • Journal of Electrical Engineering and information Science
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    • v.1 no.2
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    • pp.58-66
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    • 1996
  • An adaptive input-output linearization technique of an interior permanent magnet synchronous motor with a specified output dynamic performance is proposed. The adaptive parameter estimation is achieved by a model reference adaptive technique where the stator resistance and the magnitude of flux linkage can be estimated with the current dynamic model and state observer. Using these estimated parameters, the linearizing control inputs are calculated. With these control inputs, the input-output linearization is performed and the load torque is estimated. The adaptation laws are derived by the Popov's hyperstability theory and the positivity concept. The robustness and the output dynamic performance of the proposed control scheme are verified through the computer simulations.

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