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Global parameter estimation of the Cochlodinium polykrikoides model using bioassay data

Acta Oceanologica Sinica 2016年第2期35卷 39-45页

作者： CHO Hong-Yeon PARK Kwang-soon KIM Sung Coastal and Environmental Engineering Division Korea Institute of Ocean Science and Technology Coastal Disaster Research Center Korea Institute of Ocean Science and Technology Biological Oceanography and Marine Biology Division Korea Institute of Ocean Science and Technology

Cochlodinium polykrikoides is a notoriously harmful algal species that inflicts severe damage on the aquacultures of the coastal seas of Korea and Japan. Information on their expected movement tracks and boundaries of influence is very useful and important for the effective establishment of a reduction plan. In general, the information is supported by a red-tide（a.k.a algal bloom） model. The performance of the model is highly dependent on the accuracy of parameters, which are the coefficients of functions approximating the biological growth and loss patterns of the C. polykrikoides. These parameters have been estimated using the bioassay data composed of growth-limiting factor and net growth rate value pairs. In the case of the C. polykrikoides, the parameters are different from each other in accordance with the used data because the bioassay data are sufficient compared to the other algal species. The parameters estimated by one specific dataset can be viewed as locally-optimized because they are adjusted only by that dataset. In cases where the other one data set is used, the estimation error might be considerable. In this study, the parameters are estimated by all available data sets without the use of only one specific data set and thus can be considered globally optimized. The cost function for the optimization is defined as the integrated mean squared estimation error, i.e., the difference between the values of the experimental and estimated rates. Based on quantitative error analysis, the root-mean squared errors of the global parameters show smaller values, approximately 25%–50%, than the values of the local parameters. In addition, bias is removed completely in the case of the globally estimated parameters. The parameter sets can be used as the reference default values of a red-tide model because they are optimal and representative. However, additional tuning of the parameters using the in-situ monitoring data is highly *** opposed to the bioassay d

关键词： global and local estimation gain and loss parameters Cochlodinium polykrikoides bioassay data model performance

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Enhanced photocatalytic activity of fish scale loaded TiO_2 composites under solar light irradiation

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Journal of Environmental Sciences 2012年第6期24卷 1142-1148页

作者： Li-Ngee Ho soon-An Ong Hakimah Osman Fong-Mun Chong School of Materials Engineering University Malaysia Perlis02600 ArauPerlisMalaysia School of Environmental Engineering University Malaysia Perlis02600 ArauPerlisMalaysia

Fish scale （FS） loaded TiO2 composites were investigated as photocatalysts in degradation of Methyl Orange under solar light irradiation. Composites were prepared through sol-gel method by varying mass ratio of TiO2/FS at 90：10, 70：30 and 50：50, respectively. The catalysts prepared in this study were characterized by using XRD, SEM, FT-IR and nitrogen sorption. The effects of solar irradiation, mass ratio of TiO//FS composites, irradiation time and catalyst loadings were studied. Synergistic effect was found in TiO2/FS of 90：10 composite which performed higher photocatalytic degradation than synthesized TiO2 under solar light irradiation. However, further increasing fish scale content in the composites reduced the photocatalytic activity drastically. Under solar light irradiation, all the catalysts in this study exhibited photocatalytic activity, except TiO2/FS of 50：50 composite that only acted as a weak biosorbent without performing any photocatalytic property. Photocatalytic degradation increased with increasing catalyst loading and irradiation time but decreased with increased of initial dye concentration.

关键词： photocatalytic degradation dye fish scale TiO2

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Exploring anharmonic lattice dynamics and dielectric relations in niobate perovskites from first-principles self-consistent phonon calculations

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npj Computational Materials 2023年第1期9卷 757-766页

作者： Kwangrae Kim Woohyun Hwang Seung-Hyun Victor Oh Aloysius soon Department of Materials Science&Engineering Yonsei UniversitySeoul 03722Republic of Korea

Group I niobates(KNbO_(3) and NaNbO_(3))are promising lead-free alternatives for high-performance energy storage *** their potential,their complex phase transitions arising from temperature-dependent phonon softening and anharmonic effects on dielectric properties remain poorly *** this study,we employ density-functional theory(DFT)and self-consistent phonon(SCP)calculations to investigate finite-temperature phonons in cubic niobate *** include explicit anharmonic vibrational effects,SCP frequencies are shifted by the bubble self-energy correction within the quasiparticle(QP)approximation,providing precise descriptions of phonon softening in these strongly anharmonic *** further calculate the static dielectric constant of KNbO_(3) and NaNbO_(3) as a function of temperature using the Lyddane-Sachs-Teller(LST)relation and QP-corrected phonon *** theoretical results align with experimental data,offering reliable temperature-dependent phonon dispersions while considering anharmonic self-energies and thermal expansion effects,enhancing our understanding of the complex relations between lattice vibrations and phase transitions in these anharmonic oxides.

关键词： harmonic phonon dielectric

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Refined Functional Equations Stemming from Cubic,Quadratic and Additive Mappings

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Acta Mathematica Sinica,English Series 2009年第10期25卷 1595-1608页

作者： Ick-soon CHANG Eunyoung SON Hark-Mahn KIM Department of Mathematics Mokwon University Department of Mathematics Chungnam National University

Let n ≥ 2 be an integer. In this paper, we investigate the generalized Hyers-Ulam stability problem for the following functional equation f（n-1∑j=1 xj＋2xn）＋f（n-1∑j=1 xj-2xn）＋8 n-1∑j=1f（xj）=2f（n-1∑j=1 xj... 详细信息

关键词： generalized Hyers-Ulam stability functional equations cubic mappings quadratic mappings difference operator

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Prediction of Compressive Strength of Biodegradable Mg–Zn/HA Composite via Response Surface Methodology and Its Biodegradation

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Acta Metallurgica Sinica(English Letters) 2016年第5期29卷 464-474页

作者： Loy Liang soon Hussain Zuhailawati Ismail Suhaina Brij Kumar Dhindaw Structural Materials Niche Area Group School of Materialsand Mineral Resources EngineeringEngineering CampusUniversiti Sains Malaysia14300 Nibong TebalPenangMalaysia School of Minerals Metallurgical and Materials EngineeringIndian Institute of Technology Bhubaneswar Bhubaneswar751007India

This work aimed to fabricate magnesium zinc/hydroxyapatite （Mg-Zn/HA） composite via powder metallurgy method and to develop a mathematical model to predict the compressive strength of the composite using response surface methodology method. The effect of various mechanical milling parameters, milling speed （200-300 r/rain）, ball-to-powder weight ratio （5-12.5） and HA content （2.6-10 wt%） on the compressive strength of Mg-Zn/HA composite was investigated. The model shows that high compressive strength of Mg-Zn/HA composite was achieved when the powders were prepared with high milling speed and ball-to- powder weight ratio and low HA content. The mathematical model was adequate with error percentage lower than 3.4%. The microstructure of Mg-Zn/HA composite with different process parameters revealed that fine microstructure was observed at high milling speed and ball-to-powder weight ratio while agglomeration of HA was found in composite with 10 wt% HA. The agglomeration of HA led to degradation of interfacial bonding strength between matrix and reinforcement phases and hence decreased the overall compressive strength of Mg-Zn/HA composite. Biodegradation test revealed that sample with higher HA content had more weight gain and there was more formation of hydroxyapatite. Mg-Zn/HA composite with 8 wt% HA was found to be the best candidate for implant application because it had considerable compressive strength and good biodegradation properties.

关键词： Powder metallurgy Magnesium-zinc alloy Hydroxyapatite Response surface methodology Biodegradation

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Shape correspondence for cel animation based on a shape association graph and spectral matching

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Computational Visual Media 2023年第3期9卷 633-656页

作者： Shaolong Liu Xingce Wang Xiangyuan Liu Zhongke Wu Hock soon Seah Beijing Normal University Beijing 100875China Nanyang Technological University Singapore 639798Singapore

We present an effective spectral matching method based on a shape association graph for finding region correspondences between two cel animation *** formulate the correspondence problem as an adapted quadratic assignment problem,which comprehensively considers both the intrinsic geometric and topology of regions to find the globally optimal *** simultaneously represent the geometric and topological similarities between regions,we propose a shape association graph(SAG),whose node attributes indicate the geometric distance between regions,and whose edge attributes indicate the topological distance between combined region *** convert topological distance to geometric distance between geometric objects with topological features of the pairs,and introduce Kendall shape space to calculate the intrinsic geometric *** utilizing the spectral properties of the affinity matrix induced by the SAG,our approach can efficiently extract globally optimal region correspondences,even if shapes have inconsistent topology and severe *** is also robust to shapes undergoing similarity transformations,and compatible with parallel computing techniques.

关键词： cel animation shape correspondence shape association graph(SAG) spectral matching quadratic assignment Kendall shape space

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Pyogenic liver abscess as the first manifestation of hepatobiliary malignancy

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Hepatobiliary & Pancreatic Diseases International 2009年第5期8卷 547-550页

作者： Vui Heng Chong Kian soon Lim Gastroenterology Unit Department of MedicineRaja Isteri Pengiran Anak Saleha(RIPAS)HospitalBandar Seri Begawan BA 1710Brunei Darussalam Gastroenterology Unit Department of RadiologyRaja Isteri Pengiran Anak Saleha(RIPAS)HospitalBandar Seri Begawan BA 1710Brunei Darussalam

BACKGROUND:Pyogenic liver abscess(PLA)is commonly seen in patients in the Far ***,hepatobiliary neoplasms are also *** as the initial manifestation of hepatobiliary neoplasms is extremely rare. METHOD:Three patients with PLA were identified from the ward registion files and were retrospectively reviewed. RESULTS:These patients(two men aged 74 and 80 years, and one woman aged 35 years)were treated(in the right lobe in two patients and in the left lobe in one)and subsequently followed up for 11-22 *** patients were diagnosed with hepatocellular carcinoma and one with metastatic *** patients were subjected to biopsies showing features of inflammatory pseudotumor before a diagnosis of hepatocellular *** patient underwent hepatic resection with good *** the other two patients who declined any further interventions,one died a few weeks after diagnosis and the other is still alive on conservative treatment. CONCLUSIONS:This series of cases highlights the importance of considering underlying hepatobiliary malignancies in patients with PLA and a close follow-up necessary for non-resolving hepatic lesions.

关键词： hepatocellular carcinoma cholangiocarcinoma infections inflammatory pseudotumor

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Anticancer effect of curcumin on breast cancer and stem cells

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Food Science and Human Wellness 2018年第2期7卷 134-137页

作者： Hui-Tien Liu Yuan-soon Ho Graduate Institute of Medical Sciences College of MediineTaipei Medical UniversityTaipeiTaiwanChina Graduate Institute of Medical Sciences College of Medical Science and TechnologyTaipei Medical UniversityTaipeiTaiwanChina

Numerous studies have shown that curcumin,a natural compound,exerts anticancer effects by inhibiting cancer cell proliferation and metastasis and by inducing cell cycle arrest and *** particular,curcumin exhibits potent inhibitory effects on breast cancer,the most prevalent type of cancer among women *** has low maximal inhibitory concentration for breast cancer cell lines that express the hormone receptor ER and sensitizes cell lines to anticancer ***,it can induce apoptosis in cell lines independently of hormone receptor *** addition,curcumin inhibits the proliferation of breast cancer stem cells(BCSC),an important factor that influences cancer *** inhibition of BCSC proliferation suppresses metastasis and reattachment,ultimately limiting tumor formation.A xenograft study similarly showed that curcumin exerts tumor-suppression effects on cancer cells and cancer stem ***,curcumin is a potential anticancer compound,and its concurrent application with other anticancer drugs appears promising.

关键词： Curcumin Breast cancer Breast cancer stem cell

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Nutraceutical support for respiratory diseases

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Food Science and Human Wellness 2018年第3期7卷 205-208页

作者： Yu-Ya Hwang Yuan-soon Ho Graduate Institute of Medical Sciences College of MedicineTaipei Medical UniversityTaipei 10031TaiwanChina

Respiratory diseases have been a major health concern for human beings since several *** the irritated nasal passages and airways had been a mutual necessity in multiple ancient *** ancient China,herbs were largely used to help deal with cough and reduce mucus,thereby maintaining respiratory *** India,knowledge of herb-related remedies passed down through *** the human society,freshly prepared herb ointments,including air-dried herbs,and boiled herbal soups have had a long history of combining botanical nutrients with local *** the use of herbs and natural products from plants(NPFPs)has been primarily cited in reviews based on modern respiratory diseases,the concept of soothing and alleviating disease progression or reducing mucus production has been highly ***,only a few herbs could directly disrupt the irreversible fibrotic *** the other hand,natural products from animals(NPFAs)have more potential in disrupting procollagen or extracellular matrix *** to these reasons,NPFAs could be considered as important functional foods for patients with respiratory *** this article,we provide a review of both NPFAs and NPFPs that are adjuvant to respiratory health.

关键词： Respiratory disease NPFP NPFA Nutrition Antioxidants

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Extreme venous letting and cupping resulting in life-threatening anemia and acute myocardial infarction:A case report

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World Journal of Clinical Cases 2020年第24期8卷 6432-6436页

作者： Albert Youngwoo Jang soon Yong Suh Department of Cardiology Gachon University Gil Medical CenterIncheon 21565South Korea Department of Cardiology Gachon University Gil HospitalIncheon 21565South Korea

BACKGROUND Wet cupping (WC) is a traditional therapy of skin suction-assisted bloodlettingthat is widely used in modern alternative medicine in Asia and the Middle ***, we report the case of a male who presented with ST-elevation myocardialinfarction (STEMI) and life-threatening anemia and underwent excessive *** SUMMARY A 55-year-old male presented with chest pain (30 min) and dyspnea (3 wk). Hisinitial electrocardiogram suggested STEMI in the anterior wall. Furthermore, hislaboratory results showed severe anemia with a hemoglobin level of 4.1 g/dL. Ofnote, the patient underwent regular WC therapy for chronic back pain, which hehad recently intensified. His WC practice resulted in life-threatening anemia andeventually STEMI. Percutaneous coronary intervention in the left anteriordescending artery was performed to treat the STEMI. His dyspnea dramaticallyimproved after the transfusion, and his hemoglobin level returned to 14.8 g/dLwithin 2 mo after discharge. He has been uneventful for the last seven years *** The current case demonstrates that excessive WC without adequate medicalmonitoring can result in severe anemia, which can further develop into STEMI.

关键词： Bloodletting ST-elevation myocardial infarction Anemia Cupping Wet cupping Case report

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