Sehyun Park

IoT-based smart garbage system for efficient food waste management.

Owing to a paradigm shift toward Internet of Things (IoT), researches into IoT services have been conducted in a wide range of fields. As a major application field of IoT, waste management has become one such issue. The absence of efficient waste management has caused serious environmental problems and cost issues. Therefore, in this paper, an IoT-based smart garbage system (SGS) is proposed to reduce the amount of food waste. In an SGS, battery-based smart garbage bins (SGBs) exchange information with each other using wireless mesh networks, and a router and server collect and analyze the information for service provisioning. Furthermore, the SGS includes various IoT techniques considering user convenience and increases the battery lifetime through two types of energy-efficient operations of the SGBs: stand-alone operation and cooperation-based operation. The proposed SGS had been operated as a pilot project in Gangnam district, Seoul, Republic of Korea, for a one-year period. The experiment showed that the average amount of food waste could be reduced by 33%.

IoT-based monitoring system using tri-level context making model for smart home services

In future smart home based on Internet of Things (IoT), data acquisition and information analysis through various sensors will play a crucial role, and it will be a core technology to develop IoT-based smart home services. This paper proposes an IoT-based monitoring system using a tri-level context making model for context-aware services in smart homes.

Degradation diagnosis system of photovoltaic panels with mobile application

Recently, the number of buildings and houses in which photovoltaic (PV) systems are installed has increased. However, an issue with the efficiency of the PV system and the degradation phenomenon has been revealed. Consumers who benefit from the PV system experience difficulties monitoring and controlling it because a PV diagnosis system is heavy and expensive to install at home. Furthermore, the existing diagnosis system is not coordinated with a home energy management system. In addition, the accurate performance evaluation of the PV system is required for energy management. Therefore, a new degradation diagnosis system for PV panels for household consumers is proposed in this paper. Additionally, a mobile-type home gateway that has various management applications is proposed. It is demonstrated that, with this mobile-type home gateway applied to the proposed system, consumers can monitor the degradation of the PV system, analyze the efficiency of the PV panels, and save energy at home by using a mobile-type home gateway.

An IoT-based home energy management system over dynamic home area networks

A smart grid (SG) has attracted great attention due to recent environmental problems. SG technologies enable users, such as energy system operators and consumers, to reduce energy consumption and the emission of greenhouse gases, by changing energy infrastructure more efficiently. As a part of the SG, home energy management system (HEMS) has become increasingly important, because energy consumption of a residential sector accounts for a significant amount of total energy consumption. However, a conventional HEMS has some architectural limitations on scalability, reusability, and interoperability. Furthermore, the cost of implementation of a HEMS is very expensive, which leads to the disturbance of the spread of a HEMS. Therefore, this paper proposes an Internet of Things- (IoT-) based HEMS with lightweight photovoltaic (PV) system over dynamic home area networks (DHANs), which enables the construction of a HEMS to be more scalable, reusable, and interoperable. We suggest the techniques for reducing the cost of the HEMS with various perspectives on system, network, and middleware architecture. We designed and implemented the proposed HEMS and conducted a experiment to verify the performance of the proposed system.

An energy efficient smart LED lighting system for building energy management

Recently, there have been a variety researches on reducing building energy consumption. In particular, a LED lighting system has gained considerable interests because the system can reduce a lot of energy consumption in buildings. Therefore, this paper proposes a LED lighting system that has energy efficient structure of LED lights. The energy consumption is reduced by controlling the LED lights based on user movement.

Zone-aware service system with nomadic resources for cost-effective pervasive infrastructure

The context-aware service system (CASS) for smart home services has received considerable attention due to advances made in context-awareness technologies. In recent years, various context-aware consumer electronics for intelligent and personalized user-centric services have been introduced. However, the conventional CASS has architectural limitations, including low availability, low interoperability, and low scalability. For example, it is difficult to modify or update the context-aware service (CAS) infrastructure once it has been built. Therefore, this paper proposes a zone-aware service system (ZASS) for cost-effective pervasive infrastructure. The main component of the ZASS is a zone-aware service agent (ZASA) which utilizes the users nomadic resource as a sensor or gateway. The term `users nomadic resource refers to the users hand-held device, which has a sensing or networking capability, such as a smartphone, smart watch, and mobile sensor, etc. As the utilization of the users nomadic resource, the ZASS can be cost-effectively implemented compared with the conventional CASS. The performance of the proposed system is discussed via a simple smart home service scenario. The experimental result showed that the proposed system can reduce the power consumption of an air conditioner by 20.7%.

Intelligent office energy management system by analysis in Hyper-connected-IoT environments

As the importance of efficient energy management continues to increase, energy management systems (EMS) are also being actively researched and propagated. The most familiar and widely used system is the scheduling-based EMS. However, this system disallows maximized efficiency of energy management in environments where various users and devices coexist. In this paper, suggested energy management method through User-Device intimacy that based on the materialization of Hyper-connected-IoT environments (a concept that links Data, IoT, and space). Ultimately, more energy can be saved than from existing scheduling-based EMS.

Design and implementation of wired drone docking system for cost-effective security system in IoT environment

Recently, there are numerous researches on drones. However, short flight time of drones caused by low battery is the most notable disadvantage of drones. Additionally security systems for large areas in IoT environments, wireless sensor networks, blind spot of sensors have the potential to be further developed. The WDDS suggested in this paper can resolve these problems. With the WDDS, users can prevent absence of surveillance drones and can observe large areas without blind spots in IoT environments cost effectively.

Design of a mass-customization-based cost-effective Internet of Things sensor system in smart building spaces:

In the coming Internet of Things era, billions of users and devices will be connected to the Internet; this will lead beyond the era of super-connection to the era of super-fusion. In this era, it is more important than ever to design a highly scalable Internet of Things infrastructure by mass customization for cost-effective production of exponentially increasing numbers of Internet of Things systems to provide more intelligent service in smart spaces. The purpose of this article is the design of mass-customization-based Internet of Things system through three-level analysis of the building; it proposes a new concept of a systematic design for providing economical Internet of Things systems for intelligent service in smart building spaces through three-level analysis comprising environmental-, service-, and functional-level analyses.

Design and implementation of wristband-based smart energy management system

This paper proposes a novel energy management system using an energy management smart band (EMSB) and an intelligent smart plug (ISP). The proposed system cuts off standby power and controls temperature of an air conditioner considering users. Total power consumption was reduced by up to 12.5% using the proposed system.