A5062667128- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Urinary Bladder and Prostate Research
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Prostate Cancer Diagnosis and Treatment
- Urological Disorders and Treatments
- Advanced Photonic Communication Systems
- Pelvic floor disorders treatments
- Bladder and Urothelial Cancer Treatments
- Renal cell carcinoma treatment
- Ureteral procedures and complications
- Urinary and Genital Oncology Studies
- Pediatric Urology and Nephrology Studies
- Kidney Stones and Urolithiasis Treatments
- Prostate Cancer Treatment and Research
- Analytical Chemistry and Sensors
- Minimally Invasive Surgical Techniques
- Hormonal and reproductive studies
- Advanced Sensor and Control Systems
- Renal and related cancers
- Cytokine Signaling Pathways and Interactions
- Nutrition, Health and Food Behavior
- Optical Network Technologies
Gachon University
2018-2024
Gachon University Gil Medical Center
2013-2024
Seoul National University Hospital
2007-2021
Austin Hospital
2020
Incheon Medical Center
2013-2019
Korea University
1994-2019
Yonsei University
2010-2017
Seoul National University Bundang Hospital
2010-2017
Honam University
2005-2015
Hallym University Dongtan Sacred Heart Hospital
2014-2015
This article provides evidence-based recommendations and expert opinions to aid urologists in making optimal decisions regarding managing urolithiasis various clinical scenarios. The most frequently asked questions by their practice have been collected answered the form of FAQs; based on latest evidence opinions. natural history is divided into active treatment silent phases, with stage typical special situations peri-treatment management. authors address 28 key questions, offering practical...
A tunable photonic crystal fiber (PCF) coupler, which couples part of the optical power in one PCF with that another PCF, has been made by side polishing. We fabricated coupler mating two side-polished PCFs. achieved evanescent field coupling between core modes PCFs using polishing to bring cores close each other. By adjusting angle we obtained as much 90% tunability ratio. The spectrum ratio was almost flat, small ripples, over a 400-nm wavelength range.
Artificial intelligence (AI) is changing our life, including the medical field. Repeated machine learning using big data made various fields more predictable and accurate. In medicine, IBM Watson for Oncology (WFO), trained by Memorial Slone Kettering Cancer Center (MSKCC), was first introduced applied in 14 countries worldwide.Our study designed to assess feasibility of WFO actual clinical practice. We aimed investigate concordance rate between multidisciplinary tumor board (MTB) Urologic...
This paper reports a fiber-optic hydrogen sensor based on side-polished single-mode fiber coated with palladium (Pd) thin film whose optical characteristics change as it absorbs hydrogen. The transmission loss of the depends gas concentration through complex electric permittivity Pd film. An optimal design for has been pursued to obtain both high sensitivity and short response time. When exposed 4% gas, output power obtained in this experiment was 1.2 dB (32%) rise time 100 s.
To compensate for the temperature dependency of a standard FBG, cladding-etched FBG immersed with liquid mixture having negative thermo-optic coefficient is presented, and its characteristics are investigated. The Bragg wavelength shifted counter to direction shift conventional according mixing ratio glycerin water; thus, temperature-dependent was almost compensated by using water (50%) −5 × 10−4 °C−1.
We propose a simple hydrogen detection scheme based on Mach-Zehnder interferometer formed with pair of palladium-coated long-period fiber gratings (LPGs). Since an LPG offered fine-structured interference fringe in its transmission spectrum, the resolution as sensor could be appreciably enhanced compared to that single LPG. As palladium layer absorbed hydrogen, effective refractive indices cladding modes were increased so spectrum was blue-shifted up 2.3 nm wavelength sensitivity -0.29...
We propose and demonstrate a low-loss 1×2 plastic optical fiber (POF) coupler incorporating tapered polymeric waveguide two POF transition regions. The design concept for acquiring low loss is presented. measured excess losses of the splitting combining were 0.7 1.4 dB, respectively.
Ultrasound elasticity imaging visually represents tissue hardness measurements using high-resolution ultrasound speckle-tracking algorithms. This method has recently been applied in the renal setting to measure arterial compliance end-stage disease (ESRD) and mechanical properties of transplant kidneys vivo.Ultrasound radio-frequency signal were made brachial artery 5 ESRD subjects healthy controls 2 subjects, 1 with chronic allograft nephropathy (CAN) normal graft function.Maximal percent...
This study was undertaken to determine the impact on ejaculatory function of tamsulosin (0.2 mg) given once daily (OD) for 12 weeks and identify risk factors dysfunction in patients undergoing this treatment.Males with an International Prostatic Symptom Score (IPSS) o8 were enrolled study.All participants completed questionnaires, including IPSS Male Sexual Health Questionnaire (MSHQ), serum prostate-specific antigen, transrectal ultrasound uroflowmetry post-void residual measured.After...
Purpose: To date, the parameters for evaluating enucleation efficiency have only considered time, although operators simultaneously consume both time and energy during holmium laser of prostate.This study was undertaken to find a better way assessing skills, considering consumed energy.Materials Methods: One hundred (n=100) consecutive patients who underwent prostate from April 2012 2014 by single surgeon were enrolled.Ten groups 10 cases used analyze efficiency. Results:The mean energy,...
Objective In mammals, high parental testosterone levels present around the time of conception are thought to skew offspring sex ratio toward sons. The second fourth digit (digit ratio) is now widely accepted as a negative correlate prenatal testosterone. Thus, we investigated association between and ratio. Methods A total 508 Korean patients (257 males 251 females) less than 60 years old who had one or more were prospectively enrolled. lengths 2nd 4th digits right hand measured by single...
<i>Introduction:</i> We investigated the clinical significance of preoperatively-unsuspected ureteral involvement cancer detected on intraoperative frozen section analysis margins during radical cystectomy. <i>Patients and Methods:</i> performed a retrospective study 115 patients who received cystectomy for locally-advanced but node-negative transitional cell carcinoma bladder between 1995 2002 by reviewing their records. <i>Results:</i> Of total patients,...
This paper reports a fiber-optic temperature sensor using single mode fused fiber coupler incorporating thermo-optic external medium. The spectral transmission was altered by changing the refractive index of A theoretical and experimental investigation carried out with aim achieving high sensitivity. measured sensitivity for environmental as -1.5 <TEX>$nm/^{\circ}C$</TEX>.
Purpose Goserelin is a drug used for chemical castration. In rat model, we investigated whether surgical and castration affected memory ability through the protein kinase A (PKA)/cyclic adenosine monophosphate response element-binding (CREB)/brain-derived neurotrophic factor (BDNF) c-Raf/mitogen-activated kinases-extracellular signal–regulated kinases (MEK)/extracellular (ERK) pathways in hippocampus. Methods Orchiectomy was performed goserelin acetate subcutaneously transplanted into...
A new formula for a catadioptric panoramic lens with an equidistance projection scheme has been derived. The fabricated field of view that is wider than any previously reported lens, and the nonimaged region near back camera constant volume zero angular extension.
We propose a novel method for fabricating fused fiber couplers whose transmission spectrum and sensitivity can be controlled in the wet-etching process. A wide tuning of during wet etching was observed experimentally. It demonstrated that etched with reduced waist size had high to refractive index an external medium. The achieved by present coupler sensor 1125 nm/refractive unit.
Catheter-related bladder discomfort (CRBD) has been found in many patients with urologic surgery. The authors investigated the effect of analgesic-eluting urethral catheters on postoperative CRBD.
We propose a simple in-line variable optical attenuator (VOA) based on the bending effect of tapered single mode fibers. The influence taper structure and reflective index external medium surrounding region loss fiber have been investigated experimentally. An attenuation range exceeding 35 dB very low excess < 0.2 at 1550 nm were achieved. measured polarization dependent present VOA level 10 dB, 20 30 0.1 0.5 respectively.
Little data are available on the learning curve for laparoendoscopic single-site (LESS) surgery. We aimed to evaluate LESS radical nephrectomy localized renal-cell carcinoma (RCC).Data from first 50 consecutive patients who underwent were reviewed evaluation of curve. The surgical procedure was broken down into its three essential components (medial retraction colon, hilar dissection, and kidney mobilization) through a video review, each operative time separately recorded analysis. Patient...