Schedule management is an effective scientific method to determine the progress of the target. Through breaking down the large duration of the objectives and tasks, a reasonable plan is developed and progress control management is implemented, so as to ultimately achieve the duration objectives. Based on the Hefei City Rail Transit Line 1 Zhugang, Dadongmei, Baogongyuan and Heifei University of South Campus as the research object, the schedule of the project problems in-depth according to the construction process sequence and shield construction characteristics was analyzed in this paper, and a reasonable schedule was developed to seize the key control points of the plan to carry out key breakthroughs through the WBS decomposition of the project. Finally, the author proposed to optimize the progress of station and tunnel schedule management, so as to ensure that the construction site can be carried out in strict accordance with the plan. This can improve the company's schedule management level greatly, and provide a basis to strengthen the modern construction management system

Waste ripe plantain peels and groundnut shell constitute environmental pollution in the Niger Delta Area of Nigeria where it is not properly disposed. These wastes can be converted into useful products such as pozzolans as replacement for cement in Sandcrete block production, thus helping to conserve the environment and preserve the earth crust. This research work is aimed at determining if the compressive strength of blocks made from replacement of cement with these pozzolans obtained from waste ripe plantain peel ash and dry groundnut shell ash and their blends would meet regulatory standard for use as partial replacement for cement. The results obtained from the experiments carried showed that Plantain peel ash (PPA) and groundnut shell ash(GSA) contains cementitious properties and can be used as replacement for cement in sandcrete. The compressive strength of blocks produced decreases with increasing percentage replacement of the waste ash with cement. Sandcrete blocks made with plantain peel ash cannot be used in areas with lots of water because of the water absorption properties of plantain peel ash and the ternary blend (GSA/PPA) of the ashes proves to have greater compressive strength than individual binary mixture PPA and GSA respectively. The cement replacement by these pozzolans is best achieved at replacement up to 10% ash.

All electronic devices generate heat due to the current flow through them. Unless the heat is removed constantly the temperature of the devices will continuously increase leading to failure. Compared to the previous components like vacuum tubes, the heat generated by individual device is very small. But the developments from transistors, integrated circuits and microprocessor have resulted in millions devices being packed into a chip of millimeter size. High heat flux of electronic devices, e.g. projector, LED, high power chip, etc., require efficient cooling methods for heat dissipation in a limited region. It means maintaining a small heat source at an acceptable temperature. The present paper reviews the literature dealing with various aspects of cooling methods. Included are papers on experimental work on analyzing cooling technique and its stability, numerical modeling, natural convection, and advanced cooling methods. The issues of thermal management of electronics, development of new effective cooling schemes by using advanced materials and manufacturing methods are also enumerated in this paper.