公开(公告)号：US20250129727A1

公开(公告)日：2025-04-24

申请号：US18744460

申请日：2024-06-14

Applicant: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION

Inventor： Moon Joo LEE ,  Myung Hun KIM ,  Jun Hee CHO

IPC: F01K21/06

Abstract: Provided is an operation method of a heat engine device using a single ion configured to greatly improve the efficiency of a heat engine by performing work in a different way than heat engine apparatuses to which classical thermodynamics applies. With the single ion heat engine device, a heat engine cycle in accordance with an auto engine cycle can be established on a micro-scale. Accordingly, the heat engine device using single ion has the effect of being able to be utilized as a substantially mesoscopic or nano-scale heat engine. This utilization is based on concepts, such as temperature, entropy, and pressure, that vary with features of a micro-miniaturized heat engine and types of thermal reservoirs and on interpretation of a change in engine efficiency.

公开(公告)号：US20200286042A1

公开(公告)日：2020-09-10

申请号：US16812230

申请日：2020-03-06

Applicant: POSTECH Research and Business Development Foundation

Inventor： Eul Bum LEE ,  Myung Hun KIM

IPC: G06Q10/10 ,  G06Q50/04 ,  G06Q50/08 ,  G06Q50/16 ,  G06Q50/18 ,  G06Q10/08 ,  G06Q10/06 ,  G06Q10/04 ,  G06N5/04 ,  G06F30/20

Abstract: Provided are a management method, system and program for detailed engineering of a plant project. The management method includes: determining a start date for a process of a project; preparing an engineering maturity assessment data including index data; determining a key milestone schedule; calculating a first engineering maturity assessment score at a contract time; comparing the first engineering maturity assessment score with a reference value, calculating a second engineering maturity assessment score at a key milestone time; comparing the second engineering maturity assessment score with a second reference value; calculating a third engineering maturity assessment score at the start date; and comparing the third engineering maturity assessment score with a third reference value, wherein the process is performed according to the start date for the project process if the third engineering maturity assessment score is less than the third reference value.