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Cooling Surface for Rolled Ice Cream Preparation
ME-A-07
Guy Niv; guyniv07@gmail.com Nisim Bitan; nisimbitan172@gmail.com
Advisor: Dr. Alex Koyfman
NRCN - Nuclear Research Center Negev
This project addresses the engineering challenge of rapidly freezing ice cream mixtures to efficiently produce rolled ice cream. A cooling surface capable of maintaining a uniform temperature below - 18°C was designed and constructed. This refrigeration system utilizes R404A refrigerant, integrating essential components including a compressor, condenser, evaporator, and capillary tube. Our design prioritizes consistent cooling, durability, food safety, and ease of maintenance. The resulting system enables continuous preparation of rolled ice cream, meeting both technical performance and practical operational criteria.
Keywords: capillary tube, cooling surface, evaporator, heat transfer, rolled ice cream
Design and Enhancement of a Mechanical Prosthesis for Muscle Strengthening in Upper- Limb Amputees
ME-A-08
Omer Jorno; omerjorno4@gmail.com
Aviv Vandenberg; avivvandenberg01@gmail.com
Advisor: Ms. Naama Agassi
SCE - Shamoon College of Engineering, Be’er-Sheva
Above-elbow amputation presents both functional and physiological challenges, including muscle deterioration in the chest and triceps. Existing prostheses are heavy, expensive, and do not promote muscle strengthening. The goal of this project is to develop an innovative, lightweight, and modular prosthesis that also preserves muscle mass. Our study included a literature review, collaboration with the “Tikkun Olam Makers” (TOM) organization, and consultations with amputees. A 3D-printed prosthesis was developed with an interchangeable attachment system and controlled resistance for muscle strengthening. The results show that our prosthesis improves functionality, enables independent strength training, and enhances comfort and customization, providing a superior functional and rehabilitative solution, while reducing weight and cost, compared to existing prosthetic options.
Keywords: 3D printing, above-elbow amputation, customization, lightweight, modular design, muscle strengthening, prosthesis, rehabilitation