Seminar về chủ đề: "Công nghệ Tiên tiến và Ứng dụng Đa ngành: Từ Vật lý Chất rắn, Sản xuất Xanh đến Chăm sóc Sức khỏe Thông minh"

Vào 9h00, ngày 11/07/2025 Viện IAST tổ chức buổi trao đổi học thuật tại Văn phòng Viện Công nghệ tiên tiến tại Hà Nội với nội dung chi tiết như sau:

1/ TS. Lê Thị Cẩm Tú trình bày về "From Wigner Functions to Bohmian Trajectories in Solid-State HHG"

Abstract:

Bohmian trajectories (BTs) offer an intuitive, trajectory-based interpretation of quantum dynamics; however, their derivation traditionally relies on direct access to the wave function. In solid-state high-harmonic generation (HHG), the typical approach is based on the semiconductor Bloch equations (SBEs), which provide observables such as polarization and currents rather than explicit wave functions, posing a challenge for constructing BTs in this context. In this work, we investigate an alternative route through the Wigner distribution function (WDF), a phase-space representation of quantum states that can be derived from SBEs. By employing the guidance equation expressed in terms of the WDF, we can numerically construct Bohmian trajectories and compare them to those directly obtained from the wave function. We present numerical results that illustrate the similarities and differences between the two approaches, providing insight into trajectory-based analysis for solid-state HHG.

2/ TS. Trần Ngọc Giang trình bày về "Green manufacturing of extreme wettability contrast surfaces with superhydrophilic and superhydrophobic patterns on aluminum''

Abstract:

In nature, to adapt to desert life, many insect species have evolved remarkably ingenious ways to drink water. Stenocara beetles have a hydrophilic/hydrophobic contrast surface for water harvesting in the desert by mist condensation in hydrophilic regions and water transport through hydrophobic regions. This natureinspired wettability contrast surface has been widely studied for water harvesting, efficient heat transfer using dropwise condensation, and liquid arrays for biomedical applications. However, most fabrication methods have used toxic chemical coatings with silanization or fluorination. In this study, extreme wettability contrast aluminum surfaces having stable superhydrophilic/superhydrophobic properties were fabricated with a green manufacturing process including laser beam machining, boiling water treatment, and silicone oil heat treatment without the use of toxic chemicals. The mechanism of wettability transition was analyzed by surface morphology and surface chemistry. In addition, various superhydrophilic patterns on the superhydrophobic surfaces were fabricated with sub-millimeter precision for demonstration of water droplet arrays and aqueous liquid control.

3/ ThS. Nguyễn Hoàng Long trình bày về "Smart Care for Seniors: Applications and Models of Artificial Intelligence in Modern Elderly Support"

Abstract:

The rapid global aging of the population presents increasing challenges in delivering efficient, personalized, and sustainable elderly care. Artificial Intelligence (AI) has emerged as a transformative force, offering promising solutions to enhance health monitoring, reduce caregiver burden, and improve quality of life for older adults. This review provides a comprehensive overview of AI applications in elderly care across three primary settings: at home, in hospitals, and within the community. It explores key use cases such as fall detection, virtual companionship, clinical decision support, and public health risk prediction. Furthermore, the report classifies and analyzes prominent AI models—including machine learning, deep learning, and federated learning—emphasizing their roles, benefits, and limitations in elderly care contexts. Despite the growing interest, challenges remain regarding data privacy, ethical considerations, and model generalizability. The review concludes by identifying current research gaps and suggesting future directions for human-centered and culturally adaptive AI solutions in aging societies.