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  • Open Access

    ARTICLE

    The cost and guideline adherence of direct-to-consumer telemedicine companies offering gender-affirming hormone therapy

    Nicholas Sellke1,2,*, Erin Jesse1,2, Justin M. Dubin3, Tomislav D. Medved1,2, Neha S. Basti4, Janvi Ramchandra2, Robert E. Brannigan4, Joshua A. Halpern4, Nannan Thirumavalavan1,2

    Canadian Journal of Urology, Vol.32, No.2, pp. 89-94, 2025, DOI:10.32604/cju.2025.065004 - 30 April 2025

    Abstract Introduction: Direct-to-consumer (DTC) telemedicine has emerged as an option for transgender patients seeking gender affirming hormone therapy (GAHT). We aimed to characterize the healthcare services provided by DTC telemedicine companies offering GAHT and to compare their costs to a tertiary care center. Methods: We identified DTC telemedicine platforms offering GAHT via internet searches and extracted information from their websites related to evaluation, treatment, monitoring, and cost. Cost of the DTC GAHT was compared to cost for comparable services at a tertiary care center. Results: Six DTC companies were identified. All platforms utilized an informed consent model… More >

  • Open Access

    ARTICLE

    Smart Grid Peak Shaving with Energy Storage: Integrated Load Forecasting and Cost-Benefit Optimization

    Cong Zhang1,2, Chutong Zhang2, Lei Shen1, Renwei Guo2, Wan Chen1, Hui Huang2, Jie Ji2,*

    Energy Engineering, Vol.122, No.5, pp. 2077-2097, 2025, DOI:10.32604/ee.2025.064175 - 25 April 2025

    Abstract This paper presents a solution for energy storage system capacity configuration and renewable energy integration in smart grids using a multi-disciplinary optimization method. The solution involves a hybrid prediction framework based on an improved grey regression neural network (IGRNN), which combines grey prediction, an improved BP neural network, and multiple linear regression with a dynamic weight allocation mechanism to enhance prediction accuracy. Additionally, an improved cuckoo search (ICS) algorithm is designed to empower the neural network model, incorporating a gamma distribution disturbance factor and adaptive inertia weight to balance global exploration and local exploitation, achieving… More >

  • Open Access

    ARTICLE

    Two Different Methods of Impregnation of Fe3O4 Nanoparticles in Wood Composites of Three Tropical Species in Costa Rica

    Johanna Gaitán-Alvarez1, Róger Moya1,*, Alexander Berrocal1, Karla J. Merazzo1,2,3,4,5

    Journal of Renewable Materials, Vol.13, No.4, pp. 799-816, 2025, DOI:10.32604/jrm.2025.058755 - 21 April 2025

    Abstract The impregnation of nanoparticles magnetified into wood had been developed by different methods, like surface chemical coprecipitation and vacuum-pressure coprecipitation of magnetic nanoparticles (NPs). However, there is a lack of information on the best method to coprecipitation NPs. Then, the present study has the objective to measure the effects of the impregnation process of wood veneers through two in situ processes (immersion and vacuum-pressure) using a solution of FeCl3·6H2O, FeCl2·4H2O and ammonia in three tropical species (Pinus oocarpa, Vochysia ferruginea and Vochysia guatemalensis). It was measured the degree of synthesis of iron NPs using weight and density gains, Fe+3 absorption, emission… More > Graphic Abstract

    Two Different Methods of Impregnation of Fe<sub>3</sub>O<sub>4</sub> Nanoparticles in Wood Composites of Three Tropical Species in Costa Rica

  • Open Access

    ARTICLE

    A Lightweight Convolutional Neural Network with Squeeze and Excitation Module for Security Authentication Using Wireless Channel

    Xiaoying Qiu1,*, Xiaoyu Ma1, Guangxu Zhao1, Jinwei Yu2, Wenbao Jiang1, Zhaozhong Guo1, Maozhi Xu3

    CMC-Computers, Materials & Continua, Vol.83, No.2, pp. 2025-2040, 2025, DOI:10.32604/cmc.2025.061869 - 16 April 2025

    Abstract Physical layer authentication (PLA) in the context of the Internet of Things (IoT) has gained significant attention. Compared with traditional encryption and blockchain technologies, PLA provides a more computationally efficient alternative to exploiting the properties of the wireless medium itself. Some existing PLA solutions rely on static mechanisms, which are insufficient to address the authentication challenges in fifth generation (5G) and beyond wireless networks. Additionally, with the massive increase in mobile device access, the communication security of the IoT is vulnerable to spoofing attacks. To overcome the above challenges, this paper proposes a lightweight deep More >

  • Open Access

    ARTICLE

    Multi-Neighborhood Enhanced Harris Hawks Optimization for Efficient Allocation of Hybrid Renewable Energy System with Cost and Emission Reduction

    Elaine Yi-Ling Wu*

    CMES-Computer Modeling in Engineering & Sciences, Vol.143, No.1, pp. 1185-1214, 2025, DOI:10.32604/cmes.2025.064636 - 11 April 2025

    Abstract Hybrid renewable energy systems (HRES) offer cost-effectiveness, low-emission power solutions, and reduced dependence on fossil fuels. However, the renewable energy allocation problem remains challenging due to complex system interactions and multiple operational constraints. This study develops a novel Multi-Neighborhood Enhanced Harris Hawks Optimization (MNEHHO) algorithm to address the allocation of HRES components. The proposed approach integrates key technical parameters, including charge-discharge efficiency, storage device configurations, and renewable energy fraction. We formulate a comprehensive mathematical model that simultaneously minimizes levelized energy costs and pollutant emissions while maintaining system reliability. The MNEHHO algorithm employs multiple neighborhood structures… More >

  • Open Access

    ARTICLE

    Data Aggregation Point Placement and Subnetwork Optimization for Smart Grids

    Tien-Wen Sung1, Wei Li1, Chao-Yang Lee2,*, Yuzhen Chen1, Qingjun Fang1

    CMC-Computers, Materials & Continua, Vol.83, No.1, pp. 407-434, 2025, DOI:10.32604/cmc.2025.061694 - 26 March 2025

    Abstract To transmit customer power data collected by smart meters (SMs) to utility companies, data must first be transmitted to the corresponding data aggregation point (DAP) of the SM. The number of DAPs installed and the installation location greatly impact the whole network. For the traditional DAP placement algorithm, the number of DAPs must be set in advance, but determining the best number of DAPs is difficult, which undoubtedly reduces the overall performance of the network. Moreover, the excessive gap between the loads of different DAPs is also an important factor affecting the quality of the… More >

  • Open Access

    RESIDENT’S CORNER

    Complete urethral disruption after motor vehicle crash without pelvic fracture

    Maria J. D’Amico1, Jennifer A. Hagerty2

    Canadian Journal of Urology, Vol.31, No.3, pp. 11908-11910, 2024

    Abstract Urethral injuries are rare among the pediatric population, and the majority occur after trauma. This is the case of an eight-year-old female with complete proximal urethral disruption and ruptured bladder neck without pelvic fracture after a motor vehicle crash. After the accident, her bladder neck was reapproximated and a suprapubic tube was placed. Three months later, she underwent reconstruction for a bladder neck closure and appendicovesicostomy. In managing these patients, focus should first be directed at achieving a safe means of urinary drainage, and next to repair the lower urinary tract to maximize continence and More >

  • Open Access

    ARTICLE

    A costing and health-related quality of life study of high intensity focused ultrasound in primary treatment of localized low or intermediate risk prostate cancer in Ontario

    Bassem Toeama1, Nathan Perlis2, Paul Grootendorst1, William Orovan3, Emmanuel Papadimitropoulos1,4

    Canadian Journal of Urology, Vol.31, No.4, pp. 11963-11970, 2024

    Abstract Introduction: Prostate cancer is the third leading cause of death from cancer among Canadian men. High intensity focused ultrasound (HIFU) is a novel approach for primary treatment of localized prostate cancer. Little is known, however, about its costs. We aimed to collect the direct costs and health-related quality of life (HRQoL) data of HIFU in primary treatment of localized low and intermediate risk prostate cancer in Ontario.
    Materials and methods: We collected direct costs and HRQoL data of 20 patients with localized low or intermediate risk prostate cancer who received whole gland HIFU at a privately owned… More >

  • Open Access

    HOW I DO IT

    Practical, cost-effective removal of Hem-o-lok Weck clip: a novel technique

    Braden Rolig1, James A. Brown2

    Canadian Journal of Urology, Vol.31, No.5, pp. 12019-12021, 2024

    Abstract The Hem-o-lok Weck clip is part of a polymer locking ligation system often employed for hemostasis in surgical practices. Its use is routine in a wide array of surgical subspecialties. Surgeons have limited options in removing these clips when they are aberrantly positioned.
    Herein, we describe a novel, cost-effective approach for removing a Hem-o-lok clip using standard robotic instruments. This simple approach will allow surgeons to remove a Hem-o-lok clip precisely and quickly if it is not adequately placed.
    During a routine robotic-assisted laparoscopic prostatectomy a Hem-o-lok Weck clip was noted to be in juxtaposition to… More >

  • Open Access

    ARTICLE

    Single-port robotic laparoscopic ureterocalicostomy: surgical technique and clinical outcomes

    Alex J. Xu1, Jeffery S. Lin1, Po Yen Chen2, Samuel Carbunaru1, Yeonsoo S. Lee3, Lee C. Zhao1

    Canadian Journal of Urology, Vol.31, No.6, pp. 12072-12076, 2024

    Abstract Introduction: We describe a method of robotic ureterocalicostomy (RALUC) with the Da Vinci Single Port (SP) platform and present clinical outcomes in our cohort of patients.
    Materials and methods: We retrospectively reviewed all patients undergoing RALUC with the SP platform in a single-institution, IRB-approved database between 2020 2023. Demographics, preoperative, intraoperative, and postoperative outcomes were collated. Surgical success was defined as freedom from hardware, avoidance of additional surgical reconstruction, and no obstruction on follow up imaging/ureteroscopy.
    An incision is made 1/3rd the distance from anterior superior iliac spine to the umbilicus. The retroperitoneal space is entered and SP… More >

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