In Shaunta Grimes' middle-grade novel Center of Gravity, a girl loses her mom, and her dad remarries quickly, so she must rebuild her life and friendships. Tessa is an anxious person, but it's become worse since her mother died a few months ago. To calm herself down she cuts out photos of missing kids—from milk cartons—and keeps them in a file. It helps her feel like she's not alone. When her dad announces suddenly that he's getting married—and that they're moving, Tessa must navigate new friendships and a new stepmother. She knows she should let go of old habits, but that's easier said than done. Her struggle is one that many readers will understand.

Stranded light-years from home, Major Andrew Grayson and his crew are on a desperate mission to discover the Lankies' secrets. They can't let what they've found die with them. Nine hundred light-years from home, Major Andrew Grayson and the crew of NACS Washington are marooned in a sunless system with limited water, reactor fuel, and food. The last hope for survival is to go where nothing human has gone before. After embarking on a scouting mission to the only moon with surface signs of life, Andrew and his Special Tactics Team make two startling discoveries. One is a dream: a form of protein and plant life that could save the starving humans in the rogue system. The second is a nightmare: this harvested rock is infested with Lankies. Far from the seemingly mindless aggressors Andrew has battled for years, these show a terrifying awareness, and they have surprising secrets of their own hidden away in the darkness. When the Lankies sense an uninvited presence in their world, Andrew's operation becomes an expedition to hell. The odds against his small crew are stacked high. Of all the mysteries of space, how to escape with their lives is the greatest unknown of all.

Dr. Joe Strange, Prof. of Military Strategy at the U.S. Marine Corps University, has written this monograph on centers of gravity in an attempt to clarify one of the most fundamental & frequently misunderstood concepts of campaign planning. He contends that doctrine should retain the current concept of critical vulnerabilities, but should return to the original Clausewitzian concept of centers of gravity. His construct linking Centers of Gravity, Critical Capabilities, Critical Requirements & Critical Vulnerabilities (i.e. vulnerable Critical Requirements) provides Service & Joint Planners a logical & useful aid in designing plans to protect friendly sources of power while facilitating the defeat of the enemy's sources of strength.

This monograph examines Soviet operational centers of gravity during Operation Barbarossa, the German invasion of the Soviet Union in 1941. Specifically, the examination focuses in two areas: (1) German planning for Operation Barbarossa; (2) the operational objectives selected for the second phase of the campaign. The second phase was selected because it was during this phase that the focus of the German military effort became diverse. Two competing strategies within the German political and military command structure caused this. While political-ideological and economic factors influenced one, purely military concerns influenced the other. In the end, the Germans diluted combat power in phase two towards three operational objectives: Moscow, Leningrad, and the Ukraine. Thus, the research question for this monograph is: Which, if any, of the German operational objectives for the second phase of the campaign were also Soviet operational centers of gravity? The analysis of operational objectives uses Colonel William Mendel’s and Colonel Lamar Tooke’s analytical model called “Operational Logic: Selecting the Center of Gravity.” Potential centers of gravity are analyzed using a validity and a feasibility test. This monograph concludes that Moscow was the operational center of gravity for the campaign by virtue of its direct and intrinsic relationship to the strategic center of gravity—the Soviet Military.

Development of the Weight versus Moment C.G. Grid

Capitalises on the wealth of mathematical knowledge students already possess because of their familiarity with the scorekeeping and motion in sports. In this way, the book takes advanced concepts such as exponents, vector multiplication, and the unit circle to relate them to students everyday lives. While the book is meant to appeal to students who might not otherwise choose to study algebra, it employs highly challenging material, much of which is not taught until engineering school. Thus the book also provides a window to the professional world. Applications in accounting, aeronautical engineering, civil engineering and other fields are presented along with the sports examples.