An approach to evaluate groundwater recharge from streamflow and groundwater records

Wen-Jui Kung,Hsin-Fu Yeh,Hung-I Lin,Wei-Ping Chen,Cheng-Haw Lee 한국지질과학협의회 2013 Geosciences Journal Vol.17 No.3

To assess groundwater recharge, this study provided a composite method combining the recession-curve-displacement method and water-table fluctuation method. First, the initial recharge reference value was determined using the water-table fluctuation method. The corresponding groundwater discharge was then determined from the recharge reference value using the recession-curve-displacement method. Furthermore, the recession segment of the match between groundwater discharge and streamflow was computed. The recharge reference value was repeatedly adjusted to achieve a good fit with the recession segment for groundwater discharge and streamflow, thereby attaining the final groundwater recharge using the proposed method. Finally, the groundwater recharge of the Lanyang Creek basin in Taiwan was estimated as a case study. A comparison of recession-curve-displacement method and proposed composite method are presented. Estimation results show that the number of recharge events, recharge timing of these events, groundwater recharge events that satisfy recession theory, and range of transmissivity can be obtained using the proposed composite method. Comparison results demonstrate that the number of groundwater recharge events obtained with the composite method was greater than that acquired with the recession-curve-displacement method. However, the annual recharge and seasonal recharge obtained with the recession-curve-displacement method and composite method were close.

Simulation and Comparison of the Lighting Efficiency for Household Illumination with LEDs and Fluorescent Lamps

Wen-Shing Sun,Chuen-Lin Tien,Jui-Wen Pan,Tsung-Hsun Yang,Chih-Hsuan Tsuei,Yi-Han Huang 한국광학회 2013 Current Optics and Photonics Vol.17 No.5

The design of the LEDs lighting in general household illumination was proposed and compared with the fluorescent lighting in this study. Using the LED as a light source would promote energy saving lighting for household illumination purposes. We used the LightTools and DIALux software to design and simulate different standards of illuminance, different correlated color temperatures and different color rendering indices for household environments. The power consumption and efficiency of traditional illuminated light sources and an LED light source with the same standard of illuminance for lighting the household environment were analyzed and compared with each other. Finally, our results show the advantages of using white-light LEDs for lighting and household illumination.

Law and Insurance Claim of General Average: a Comparative Study on York-Antwerp Rules, the Law of English and Taiwan

( Tseng Wen Jui ),( Tseng Kuo Shyong ),( Yang Yi Chih ) 한국해운물류학회(구 한국해운학회) 2003 해운물류연구 Vol.39 No.-

General average system is a special part of maritime law, which is considered to have existed long before insurance policies, and the general average loss is to be made good by the contribution of all concerned, when the adventure is saved. Different insurance policies will cover the sacrifices and extraordinary expenses and general average contributions arising from a general average contributions arising from a general average act. This paper will study the underwriter liability for general average losses according to Marine Insurance Act, 1906. After inductive analysis, this article proposes revised suggestions of the law pertaining to the claim of general average for an underwriter in Taiwan.

Bioactive Cadinane-type Compounds from the Soft Coral Sinularia scabra

Jyh-Horng Sheu,Jui-Hsin Su,Chiung-Yao Huang,Po-Ju Li,Yi Lu,Zhi-Hong Wen,Yao-Haur Kao 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.5

Two new cadinane-type sesquiterpenoids, scabralins A (1) and B (2) were obtained from the soft coral Sinularia scabra. Metabolite 1 was shown to exhibit moderate to weak cytotoxicity against MCF-7, WiDr, Daoy, and HEp 2 cancer cell lines. Also, incubation with 10 μM compound 1 significantly inhibited the accumulation of the pro-inflammatory inducible nitric oxide synthase protein in lipopolysaccharide-stimulated RAW264.7 macrophage cells.

Major Determinants and Long-Term Outcomes of Successful Balloon Dilatation for the Pediatric Patients with Isolated Native Valvular Pulmonary Stenosis: A 10-Year Institutional Experience

Meng-Luen Lee,Jui-Wen Peng,Guo-Jhueng Tu,San-Yi Chen,Jyong-You Lee,Shu-Lin Chang 연세대학교의과대학 2008 Yonsei medical journal Vol.49 No.3

Purpose: We report herein major determinants and long- term outcomes of balloon dilatation (BD) for 27 pediatric patients with isolated native valvular pulmonary stenosis (VPS). Materials and Methods: From May 1997 to May 2003, 27 pediatric patients with VPS (pressure gradients≧ 40mmHg) were enrolled in this retrospective study. Single- balloon maneuver was applied in 26 patients, and double- balloon maneuver in 1. After BD, the pressure gradients were documented simultaneously by pullback maneuver by cardiac catheterization and echocardiography within 24 hours, at 1- month, 3-month, 1-year, and 4-to-10-year follow-ups. Results: Before BD, the echocardiographic gradients ranged from 40 to 101mmHg (61±19, 55), and from 40 to 144mmHg (69 ±32, 60) by pressure recordings. After BD, the gradients ranged from 12 to 70mmHg (29±13, 27) by pressure recording (p<0.001), and from 11 to 64mmHg (27±12, 26) by echocardiography within 24 hrs (p<0.001). The ratios of the systolic pressure of the right ventricle to those of the left ventricle were 55 to 157% (89±28, 79%) before BD, and 30 to 79% (47±13, 42%) after BD (p<0.001). Follow-up (7.7±5.7, 4.5 years) echocardiographic gradients ranged from 11 to 61mmHg (25±11, 24). Two patients did not have immediate success owing to infundibular spasm. Improved right ventricular compliance could be accounted for the ultimate success in these 2 patients. The ultimate successful rate was 100%. Conclusion: BD can achieve excellent long-term outcomes in the pediatric patients with isolated native VPS.

Seasonal yeast compositions in Forcipomyia taiwana (Diptera: Ceratopogonidae)

Hung-Wei Chen,Jui-Yu Chou,Chung-Chi Lin,Yu-Der Wen,Wei-Lung Wang 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.2

Forcipomyia taiwana, a biting midge, is one of the most annoying blood-sucking pests in Taiwan. The larvae of Forcipomyia species feed primarily on algae, and the adults feed on nectar for nutrition. After mating with male adults, females bite humans and digest blood for the formation and development of their eggs. The bites often cause human itching, swelling, skin lesion and even fatal shock. Harassment from this biting pest has become a serious problem and has influenced the quality of outdoor recreational activities. Thus, it is necessary to understand the ecology of F. taiwana to develop an effective control strategy. This study showed the seasonal variation of yeast compositions in the interior of F. taiwana. Furthermore, we found that Aureobasidium spp. appeared the most during collection times and these yeasts are able to decompose the cellulose, a major component in the cell wall of algae and Oomycete fungi. These fungi infect a broad range of host and have adverse effect on fitness of the biting midges. Thus, Aureobasidium spp. play a crucial role in the defense system of F. taiwana against pathogens. The study provides useful information that could be used in the development of biocontrol strategy in the future.

Design and Implementation of Multi-Level LLC Maximum Power Tracking PV System under Partial Shading Condition

Yu-Kai Chen,Yi-Chen Lai,Hong-Wen Hsu,Jui-Yang Chiu 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5

This paper presents the design and implementation of multi-level LLC DC/DC PV system with MPPT. The multi-level LLC converters include six LLC modules to supply  380V output voltage. LLC converter is adopted to achieve high efficiency because the low switching loss. The perturb in frequency is proposed to implement the global MPPT control algorithm for the PV system under partial shading condition. A 6kW MPPT prototype is implemented and verified the proposed control method for multi-level LLC DC/DC PV system.

User Identification Design by Fusion of Face Recognition and Speaker Recognition

Chao-Yu Lin,Kai-Tai Song,Yi-Wen Chen,Shuo-Cheng Chien,Sin-Horng Chen,Chen-Yu Chiang,Jyh-Her Yang,Yi-Chiao Wu,Tzu-Jui Liu 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10

Intelligent human-robot interface helps a mobile robot to extract external information and interact with a user. User identification information allows a robot to generate appropriate behaviors and make personalized human-robot interaction (PHRI) more natural and safe. Most of service robots move around in various application settings, and biometric features always change during relative movements. In this work, a fusion recognition system based on face and speaker classifiers is designed to achieve the user recognition in various environments. We propose a method to fuse face and speech recognition results based on the concept of confidence indices. Through the derived confidence indices, the system combines the two classifiers and gives improved recognition results. Experiments on a laboratory home service robot show that person recognition rates in 15 environmental situations all outperform those of using single modality.

Abrupt Decline in Estimated Glomerular Filtration Rate after Initiating Sodium-Glucose Cotransporter 2 Inhibitors Predicts Clinical Outcomes: A Systematic Review and Meta-Analysis

Min-Hsiang Chuang,Yu-Shuo Tang,Jui-Yi Chen,Heng-Chih Pan,Hung-Wei Liao,Wen-Kai Chu,Chung-Yi Cheng,Vin-Cent Wu,Michael Heung 대한당뇨병학회 2024 Diabetes and Metabolism Journal Vol.48 No.2

Background: The initiation of sodium-glucose cotransporter-2 inhibitors (SGLT2i) typically leads to a reversible initial dip in estimated glomerular filtration rate (eGFR). The implications of this phenomenon on clinical outcomes are not well-defined.Methods: We searched MEDLINE, Embase, and Cochrane Library from inception to March 23, 2023 to identify randomized controlled trials and cohort studies comparing kidney and cardiovascular outcomes in patients with and without initial eGFR dip after initiating SGLT2i. Pooled estimates were calculated using random-effect meta-analysis.Results: We included seven studies in our analysis, which revealed that an initial eGFR dip following the initiation of SGLT2i was associated with less annual eGFR decline (mean difference, 0.64; 95% confidence interval [CI], 0.437 to 0.843) regardless of baseline eGFR. The risk of major adverse kidney events was similar between the non-dipping and dipping groups but reduced in patients with a ≤10% eGFR dip (hazard ratio [HR], 0.915; 95% CI, 0.865 to 0.967). No significant differences were observed in the composite of hospitalized heart failure and cardiovascular death (HR, 0.824; 95% CI, 0.633 to 1.074), hospitalized heart failure (HR, 1.059; 95% CI, 0.574 to 1.952), or all-cause mortality (HR, 0.83; 95% CI, 0.589 to 1.170). The risk of serious adverse events (AEs), discontinuation of SGLT2i due to AEs, kidney-related AEs, and volume depletion were similar between the two groups. Patients with >10% eGFR dip had increased risk of hyperkalemia compared to the non-dipping group.Conclusion: Initial eGFR dip after initiating SGLT2i might be associated with less annual eGFR decline. There were no significant disparities in the risks of adverse cardiovascular outcomes between the dipping and non-dipping groups.

Robust Tracking Design Based on Adaptive Fuzzy Control of Uncertain Nonlinear MIMO Systems with Time Delayed States

Tzu-Sung Wu,Mansour Karkoub,Chien-Ting Chen,Wen-Shyong Yu,Ming-Guo Her,Jui-Yiao Su 제어·로봇·시스템학회 2013 International Journal of Control, Automation, and Vol.11 No.6

It is proposed here to use a robust tracking design based on adaptive fuzzy control technique to control a class of multi-input-multi-output (MIMO) nonlinear systems with time delayed uncertainty in which each uncertainty is assumed to be bounded by an unknown gain. This technique will overcome modeling inaccuracies, such as drag and friction losses, effect of time delayed uncertainty, as well as parameter uncertainties. The proposed control law is based on indirect adaptive fuzzy control. A fuzzy model is used to approximate the dynamics of the nonlinear MIMO system; then, two on-line estimation schemes are developed to overcome the nonlinearities and identify the gains of the delayed state uncertainties, simultaneously. The advantage of employing an adaptive fuzzy system is the use of linear analytical results instead of estimating nonlinear system functions with an online update law. The adaptive fuzzy scheme uses a Variable Structure (VS) scheme to resolve the system uncertainties, time delayed uncertainty and the external disturbances such that H∞ tracking performance is achieved. The control laws are derived based on a Lyapunov criterion and the Riccati-inequality such that all states of the system are uniformly ultimately bounded (UUB). Therefore, the effect can be reduced to any prescribed level to achieve H∞ tracking performance. A two-connected inverted pendulums system on carts and a two-degree-of-freedom mass-spring-damper system are used to validate the performance of the proposed fuzzy technique for the control of MIMO nonlinear systems.