Centre of Gravity of Surface and Solid of Revolution

1880 ◽  
Vol 3 (4) ◽  
pp. 329
Author(s):  
E. W. Hyde
Keyword(s):  
Solid Of Revolution ◽  
Centre Of Gravity

Optimalisasi sistem pergudangan pada industri air minum dalam kemasan (studi kasus pergudangan pt. ima montaz sejahtera).

2010 ◽  
Vol 8 (2) ◽  
pp. 803
Author(s):  
Ramli Usman ◽  
Achmad As'ad Sonief ◽  
Bambang Indrayadi
Keyword(s):  
Center Of Gravity ◽  
Centre Of Gravity

PT. Ima Montaz Sejahtera merupakan suatu Perusahaan Industri Air Minum Dalam Kemasan (AMDK) dengan merk “Mount Agua” dan perusahaan ini menghasilkan produk berupa produk gallon 19 liter, produk botol 1500 ml, produk botol 600 ml, dan produk gelas 240 ml. Pabrik PT. Ima Montaz Sejahtera memiliki dua buah gudang yaitu gudang material dan gudang produk jadi, didalam pengoperasian proses produksi banyak waktu yang terbuang untuk mengangkut material dari gudang ke mesin produksi dan ini disebabkan letak gudang material jauh dari mesin produksi dan juga dalam mengangkut material dari gudang ke mesin produksi harus melalui gudang produk jadi sehingga mengganggu aktifitas proses produksi. Metode yang digunakan pada penelitian ini menggunakan metode center of gravity yaitu menentukan titik pusat letak gudang baru berdasarkan tata letak mesin-mesin produksi.Dengan meningkatnya waktu produksi maka dengan sendirinya kapasitas produksi juga meningkat untuk produk gallon 19 liter sebesar 36 gallon per minggu (0,490 %), produk botol 1500 ml sebesar 211 karton per minggu (2,475 %), produk botol 600 ml sebesar 71 karton per minggu (1,172 %), dan produk gelas 240 ml sebesar 186 karton per minggu(0,731 %).Kata Kunci: Optimalisasi, Tata Letak Gudang, Centre of Gravity, Lay Out.

Conclusion

2017 ◽  
Author(s):  
Frédéric Grare
Keyword(s):  
United States ◽  
The United States ◽  
The Political ◽  
Slow Pace ◽  
Centre Of Gravity ◽  
The Us ◽  
The Future ◽  
Economic Interaction ◽  
The Asymmetry ◽  
The Relationship

India’s relationship with the United States remains crucial to its own objectives, but is also ambiguous. The asymmetry of power between the two countries is such that the relationship, if potentially useful, is not necessary for the United States while potentially risky for India. Moreover, the shift of the political centre of gravity of Asia — resulting from the growing rivalry between China and the US — is eroding the foundations of India’s policy in Asia, while prospects for greater economic interaction is limited by India’s slow pace of reforms. The future of India-US relations lies in their capacity to evolve a new quid pro quo in which the US will formulate its expectations in more realistic terms while India would assume a larger share of the burden of Asia’ security.

scholarly journals The two-dimensional hydrodynamical theory of moving aerofoils. IV

1947 ◽  
Vol 188 (1015) ◽  
pp. 439-463
Keyword(s):  
Stability Problem ◽  
Two Dimensional ◽  
Centre Of Gravity ◽  
First Approximation ◽  
Von Karman ◽  
Moving Cylinder ◽  
Period Equation ◽  
The Stability ◽  
Von Kármán ◽  
Hydrodynamical Theory

In the first part of this paper opportunity has been taken to make some adjustments in certain general formulae of previous papers, the necessity for which appeared in discussions with other workers on this subject. The general results thus amended are then applied to a general discussion of the stability problem including the effect of the trailing wake which was deliberately excluded in the previous paper. The general conclusion is that to a first approximation the wake, as usually assumed, has little or no effect on the reality of the roots of the period equation, but that it may introduce instability of the oscillations, if the centre of gravity of the element is not sufficiently far forward. During the discussion contact is made with certain partial results recently obtained by von Karman and Sears, which are shown to be particular cases of the general formulae. An Appendix is also added containing certain results on the motion of a vortex behind a moving cylinder, which were obtained to justify certain of the assumptions underlying the trail theory.

scholarly journals Accuracy of common stem volume formulae using terrestrial photogrammetric point clouds: a case study with savanna trees in Benin

2021 ◽  
Author(s):  
Hospice A. Akpo ◽  
Gilbert Atindogbé ◽  
Maxwell C. Obiakara ◽  
Arios B. Adjinanoukon ◽  
Madaï Gbedolo ◽  
...  
Keyword(s):  
Point Clouds ◽  
Stem Volume ◽  
Individual Tree ◽  
Volume Calculation ◽  
Tropical Regions ◽  
Solid Of Revolution ◽  
Taper Function ◽  
Geometric Solids ◽  
Traditional Approaches ◽  
Tree Stem

AbstractRecent applications of digital photogrammetry in forestry have highlighted its utility as a viable mensuration technique. However, in tropical regions little research has been done on the accuracy of this approach for stem volume calculation. In this study, the performance of Structure from Motion photogrammetry for estimating individual tree stem volume in relation to traditional approaches was evaluated. We selected 30 trees from five savanna species growing at the periphery of the W National Park in northern Benin and measured their circumferences at different heights using traditional tape and clinometer. Stem volumes of sample trees were estimated from the measured circumferences using nine volumetric formulae for solids of revolution, including cylinder, cone, paraboloid, neiloid and their respective fustrums. Each tree was photographed and stem volume determined using a taper function derived from tri-dimensional stem models. This reference volume was compared with the results of formulaic estimations. Tree stem profiles were further decomposed into different portions, approximately corresponding to the stump, butt logs and logs, and the suitability of each solid of revolution was assessed for simulating the resulting shapes. Stem volumes calculated using the fustrums of paraboloid and neiloid formulae were the closest to reference volumes with a bias and root mean square error of 8.0% and 24.4%, respectively. Stems closely resembled fustrums of a paraboloid and a neiloid. Individual stem portions assumed different solids as follows: fustrums of paraboloid and neiloid were more prevalent from the stump to breast height, while a paraboloid closely matched stem shapes beyond this point. Therefore, a more accurate stem volumetric estimate was attained when stems were considered as a composite of at least three geometric solids.

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