To select the best geo-potential model for the determination of Hong Kong and Shenzhen local geoids, three models EGM96, WDM94 and GPM98CR were tested in the region using GPS/leveling data and gravity measurements. The data include GPS/leveling observations at 43 stations, 640 gravity measurements covering the whole territory of Hong Kong, and 62 high precision GPS/leveling observations and 487...

INTRODUCTION The orthodontic technique favored by a clinician frequently determines how a deep curve of Spee (COS) is leveled. The primary purpose of this investigation was to confirm radiographically the long-term effectiveness of a continuous archwire technique--the Alexander discipline--in leveling the COS in patients with Class II Division 1 deep-bite malocclusions treated without extractio...

OBJECTIVE To develop and test the reliability of a case-leveling framework for assigning level of difficulty of the pharmacist's task for initial medication assessments conducted by pharmacists integrated into family physician offices. DESIGN Descriptive study. SETTING Seven family practice sites in Ontario from June 2004 to July 2006. PATIENTS Patients referred by their family physician ...

Global Positioning Systems (GPS) are satellite-based navigation systems that utilize a network of earth orbiting satellites. GPS operates well under any weather condition and does not require a subscription fee. GPS is a crucial component of precision agriculture by providing precise location information with very high repeatability. In recent years, GPS have improved in their level of performa...

The development of the Earth Gravitational Model 2008 (EGM2008) model is a significant contribution for modeling the Earth’s gravity and geoid. Recently, it can be confidently used versus geometric models following a simple refinement procedure. Several studies show that, EGM2008 can reach the accuracy of regional or local geoid models after modeling the differences between the GPS-leveling geo...

Interest in the study of global gravitational models has increased recently all over world because it is necessary for height datum transformations. Today International Center Global Earth Models (ICGEM) provides largest collection produced through data from satellite's missions CHAMP, GRACE, and GOCE ... Etc. To allow easy access internet with its more intelligent technologies, one Gravity Org...

Motivated by an application in image processing, we introduce the grid-leveling problem. It turns out to be the dual of a minimum cost flow problem for an apex graph with a grid graph as its basis. We present an O(n) algorithm for this problem. The optimum solution recovers missing DC coefficients from image and video coding by Discrete Cosine Transform used in popular standards like JPEG and M...