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This paper presents the general solutions of the problem of optimally disorbiting a vehicle initially in an elliptical orbit. A vehicle is initially moving along an elliptical orbit about a spherical planet with center at. The problem is to bring the vehicle along an optimal trajectory (in the sense of minimum fuel consumption) which finally intersects the top of the sensible atmosphere of the central planet. The top of the sensible atmosphere is assumed to form a sphere of radius R and center 0, enclosing the planet, and the motion is assumed to be planar. Several sub-classes of the problem will be considered, namely when the entry angle is given, or the entry speed is given or both the entry angle and the entry speed are pre-assigned, etc. These constraints are dictated by the safe recovery of the vehicle since the heating and deceleration during the re-entry portion of the trajectory depends on the entry angle and the entry speed.

This report investigates longitudinal dynamics of lifting vehicle in orbital flight.

Your innermost center represents the root, the core, the heart, and the soul of your being. It is the place of deepest calm, peace, balance, and stability. Awareness of the innermost center embodies the love of your heart and the consciousness of your soul. This is the highest level of awareness, and when you attain it, you become enlightened and awakened. This awareness brings you true love and happiness. This awareness brings you independence, liberation, and freedom. This awareness is the most beautiful destination that one aspires to reach and embrace. This book, Leading from Your Innermost Center: The Journey to Becoming a Conscious Leader, is written with the hope of helping you find your path to the noblest destination. The journey to discover your innermost center is challenging and arduous, but at the same time, it is also a journey filled with passion, exploration, excitement, and surprises. When you connect with your heart and become aware of your innermost center, true love and happiness begin to emerge and flourish within you.

Giới thiệu toàn cảnh Hà Nội từ thiên nhiên, con người, truyền thống lịch sử đến những hoạt động nghệ thuật, văn học, những di sản văn hoá vật thể và phi vật thể. Giới thiệu những vùng phụ cận xung quanh Hà Nội.

Everyone aspires to having the most beautiful, most valuable, most successful, and happiest life. At work, everyone's biggest goal is maximizing their enthusiasm, satisfaction, and effectiveness while also attaining career growth and advancement. To realize this dream, you must become the best version of yourself. Soft skills are the key to becoming the best, most valuable, and most fulfilled version of yourself. Critical thinking helps you stay balanced, centered, steady, free, and independent. Creativity helps you create the person and value you desire. Emotional intelligence allows you to overcome negative emotions and keep you enthusiastic, joyful, relaxed, peaceful, optimistic, and in love with life. To live happily and work effectively in any environment, you need to be adaptable. To master and conquer yourself, you need leadership skills. In addition, to lead successfully, you need skills in service, persuasion, problem-solving, and strategic planning. All of these soft skills are closely interconnected, mutually reinforcing and complementing each other. When you focus on developing one skill, the other skills will also improve. The mission of this book is to help you develop these soft skills. The key to cultivating them is to reach and utilize your deepest and highest power. That is, your heart and soul. Only by living and working with all your compassion and consciousness can you nurture and develop these special skills.

The author discusses the three Axioms in the dominant interpretation of the U.S.-Vietnam War that were established by the invisible permanent government right after the National Security Council meeting on September 21, 1960. They are: - There was never a legitimate non-communist government in Saigon (dissolution GVN) - The U.S. had no legitimate reason to be involved in Vietnamese affairs (Tonkin-Gulf-Incident) - The U.S. could not have won the war under any circumstances (U.S. troops honorable withdrawal) There are many reasons why the author decided to write this book, The New Legion. He felt compelled to write it for the longest time; after spending thirteen years in the Communists' so-called "reeducation camp." He escaped from a canal in the Mekong Delta and drifted in a rickety old boat similar to a child's toy from South Vietnam for fourteen days until he reached the nearest Pacific island, Palawan Islands, Philippines. He knew the pain that all the people who were involved suffered yet he thought that perhaps it might be best to let it become a not-so-distant memory. Now, he has finally decided to write the truth at last. It is the story of loyalty, duty, honor, and love.