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Premaratne, Sujatha,van Bruchem, J.,Chen, X.B.,Perera, H.G.D.,Oosting, S.J. Asian Australasian Association of Animal Productio 1998 Animal Bioscience Vol.11 No.6
An experiment was conducted with eight growing sheep (average initial weight 20.6 kg and average final weight 23.7 kg) in a $4{\times}4$ Latin square design to study the effect of type of forage supplementation to a basal diet of rice straw (ad libitum) and cassava (Manihot esculanta, approximately 9 g of dry matter $(DM).kg^{-0.75}{\cdot}day^{-1}$) on voluntary intake, digestion, rumen microbial protein synthesis and daily weight gain. Forages used were Leucaena (L, Leucaena leucocephala), Gliricidia (G, Gliricidia maculata) and Tithonia (T, Tithonia diversifolia, wild sunflower) at a DM supplementation level of approximately $13g.kg^{-0.75}.day^{-1}$. Organic matter intake was 40.4, 55.5, 55.0 and $54.9g{\cdot}kg.^{-0.75}{\cdot}day^{-1}$ for control (C, ad libitum straw and cassava), L, G and T. respectively, significantly lower for C than for the supplemented diets. Intake of supplementary forage had also a significantly positive effect on voluntary rice straw intake. All forage supplemented diets showed a significantly higher whole diet organic matter digestion than C ($488g{\cdot}kg^{-1}$), while T ($557g{\cdot}kg^{-1}$) differed significantly from L ($516g{\cdot}kg^{-1}$) but not from G ($526g{\cdot}kg^{-1}$). Daily weight gain was -1.7, 5.2, 5.4 and $4.7g{\cdot}kg^{-0.75}$, for C, L, G and T. respectively, significantly lower for C than for the forage-supplemented diets. Efficiency of microbial protein synthesis estimated from urinary excretion of purine derivatives was lower for C (3.8 g microbial N. (kg digestible organic matter intake $(DOMI))^{-1}$ than for the forage supplemented diets (11.3, 9.0 and 9.4 g microbial $N.(kg\;DOMI)^{-1}$ for L, G and T. respectively).
Premartane, Sujatha,van Bruchem, J.,Perera, H.G.D. Asian Australasian Association of Animal Productio 1997 Animal Bioscience Vol.10 No.2
In-vivo balance and nylon bag studies were conducted with rumen fistulated sheep to investigate the effect of type, i.e. Leucaena (L), Gliricidia (G) and Tithonia (T), and level (1, ~15; 2, ${\sim}30g\;DM/kg^{0.75}$) of foliage supplementation on voluntary intake and digestibility of rice straw. Inclusion of these leafy supplements in the diet significantly increase total feed intake. On a metabolic weight basis ($kg^{0.75}$), voluntary intake of digestible DM increased from 23.8 (control straw diet) till 27.7 (L1), 28.4(G1) and 33.1(T1) for the lover level, and till 34.8(L2), 35.9(G2) and 39.6(T2) $g/kg^{0.75}$ for the higher level of supplementation, respectively. Rumen pH was stable, on average 6.75 (control values) and ranging from 6.67 till 6.91 with the supplements. Rumen ammonia increased from 4.9 till 6.7 to 11.8 mmol/l with the supplements. The highest increase was obtained with G and the lover with L and T. The nylon bag studies showed that contrary to the rate of degradation of the supplements themselves, supplementation did not affect the in-sacco rate of straw dry matter degradation ($k_d$; range 1.87-2.08 %/h). At the higher supplement level, for L, G and T, $k_d$ values were 3.36, 8.16 and 8.58 %/h, respectively.
Soebarinoto, Soebarinoto,Chuzaemi, Siti,van Bruchem, Jaap,Hartutik, Hartutik,Mashudi, Mashudi Asian Australasian Association of Animal Productio 1997 Animal Bioscience Vol.10 No.2
Ten rice varieties were planted at two locations (lowland and highland), during the wet and dry seasons of different years. In vivo digestibility and voluntary intake of the straw, were determined in groups of fat-tail sheep, supplemented with $18g{\cdot}kg^{-0.75}$ concentrate DM, containing ~20% crude protein. Voluntary intake of digestible straw organic matter (DOMI) consistently varied from 15.2 to $20.9g{\cdot}kg^{-0.75}$ between straw varieties, averaged over locations, years and seasons, despite considerable variation between individual batches. This variation in the nutritive value of the straw was independent of straw and grain yield, so it would seem that there is scope for selection of rice varieties with straw of higher nutritive value. The variation in DOMI of straw among location of growth, year and season, was of a magnitude similar to the improvement brought about by urea-ammoniation. The in sacco degradation characteristics and digestibility of rice straw residues were superior to those of the offered straw. This can be attributed to a preference for rice straw leaves relative to stems. Averaged over location of growth, year and season, characteristics of in sacco degradation, i.e. the rate of fermentative degradation and the truly undegradable fraction, emerged as accurate predictors of the nutritive value of rice straw.
Shape Terra: 열지속특성을 응용한 CAD 피쳐 인식 도구
Ramy Harik,백승엽(Seung-Yeob Baek),Barend-Jan Van Bruchem,Michel Van Tooren (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.동계
In many CAD/CAM/CAPP applications, recognizing geometric features is of ubiquitous need. Recognizing and analyzing geometric features in a mechanical part will augment manufacturing knowledge within the product development process. Although feature recognition is progressing steadily in many computer graphics applications, it is still an undiscovered area in mechanical design; we are still lacking a feasible solution for feature recognition that can be applied specifically to the CAD parts. In this paper, we will present Shape Terra; our recent advance in CAD feature recognition technology. Shape Terra identifies the typical mechanical features from a given CAD part by utilizing the findings of traditional heat transfer theory, which says that salient features tend to retain the heat more whereas flat surfaces tend to lose it faster. Furthermore, each feature is analyzed and assigned with its meaning, such as design parameters, manufacturability, and so on. Various CAD/CAM/CAPP applications will profit from such information.