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Studies of the hydration of tricalcium silicateLe Sueur, Philip J. January 1984 (has links)
The hydration reaction of tricalcium silicate and the various factors which influence it have been investigated using calorimetry, thermogravimetry, quantitative X-ray diffractometry, scanning and transmission electron microscopy and energy dispersive X-ray analysis. Various factors associated with the synthesis and subsequent storage of tricalcium silicate were found to alter its reactivity and it is thought that these may be responsible for much of the variability in the reported reactivity of tricalcium silicate preparations. The contribution of the individual factors (such as particle size distribution and impurity ion content) to such reactivity changes was investigated. Use of the Avrami equation to model the rate of heat output curves obtained by calorimetry was found to give good fits to the experimental data. Apparent activation energies of control and calcium chloride accelerated reactions were determined from the rate parameters derived from the fitting procedure. However, it is shown that the amount of mechanistic information which can be obtained from such a fitting procedure is limited. Observation of the detailed chemical and morphological changes occurring during the hydration of tricalcium silicate and the manner in which they are influenced by incorporation of calcium chloride (as a model accelerator) and sucrose (as a model retarder) show that during the later stages of hydration the chemistry of the reaction is not affected by the presence of the admixtures, but that their incorporation does cause some changes in the microstructure of the gel product.
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Pressure Transient Analysis and Production Analysis for New Albany Shale Gas WellsSong, Bo 2010 August 1900 (has links)
Shale gas has become increasingly important to United States energy supply.
During recent decades, the mechanisms of shale gas storage and transport were gradually
recognized. Gas desorption was also realized and quantitatively described. Models and
approaches special for estimating rate decline and recovery of shale gas wells were
developed. As the strategy of the horizontal well with multiple transverse fractures
(MTFHW) was discovered and its significance to economic shale gas production was
understood, rate decline and pressure transient analysis models for this type of well were
developed to reveal the well behavior.
In this thesis, we considered a “Triple-porosity/Dual-permeability” model and
performed sensitivity studies to understand long term pressure drawdown behavior of
MTFHWs. A key observation from this study is that the early linear flow regime before
interfracture interference gives a relationship between summed fracture half-length and
permeability, from which we can estimate either when the other is known. We studied
the impact of gas desorption on the time when the pressure perturbation caused by
production from adjacent transference fractures (fracture interference time) and programmed an empirical method to calculate a time shift that can be used to qualify the
gas desorption impact on long term production behavior.
We focused on the field case Well A in New Albany Shale. We estimated the
EUR for 33 wells, including Well A, using an existing analysis approach. We applied a
unified BU-RNP method to process the one-year production/pressure transient data and
performed PTA to the resulting virtual constant-rate pressure drawdown. Production
analysis was performed meanwhile. Diagnosis plots for PTA and RNP analysis revealed
that only the early linear flow regime was visible in the data, and permeability was
estimated both from a model match and from the relationship between fracture halflength
and permeability. Considering gas desorption, the fracture interference will occur
only after several centuries. Based on this result, we recommend a well design strategy
to increase the gas recovery factor by decreasing the facture spacing. The higher EUR of
Well A compared to the vertical wells encourages drilling more MTFHWs in New
Albany Shale.
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Analysis of Data from the Barnett Shale with Conventional Statistical and Virtual Intelligence TechniquesAwoleke, Obadare O. 2009 December 1900 (has links)
Water production is a challenge in production operations because it is generally
costly to produce, treat, and it can hamper hydrocarbon production. This is especially
true for gas wells in unconventional reservoirs like shale because the relatively low gas
rates increase the economic impact of water handling costs. Therefore, we have
considered the following questions regarding water production from shale gas wells: (1)
What is the effect of water production on gas production? (2) What are the different
water producing mechanisms? and (3) What is the water production potential of a new
well in a given gas shale province.
The first question was answered by reviewing relevant literature, highlighting
observed deficiencies in previous approaches, and making recommendations for future
work. The second question was answered using a spreadsheet based Water-Gas-Ratio
analysis tool while the third question was investigated by using artificial neural networks
(ANN) to decipher the relationship between completion, fracturing, and water
production data. We will consequently use the defined relationship to predict the average
water production for a new well drilled in the Barnett Shale. This study also derived additional insight into the production trends in the Barnett shale using standard statistical
methods.
The following conclusions were reached at the end of the study:
1) The observation that water production does not have long term
deleterious effect on gas production from fractured wells in tight gas
sands cannot be directly extended to fractured wells in gas shales because
the two reservoir types do not have analogous production mechanisms.
2) Based on average operating conditions of well in the Barnett Shale, liquid
loading was found to be an important phenomenon; especially for vertical
wells.
3) A neural network was successfully used to predict average water
production potential from a well drilled in the Barnett shale. Similar
methodology can be used to predict average gas production potential.
Results from this work can be utilized to mitigate risk of water problems in new
Barnett Shale wells and predict water issues in other shale plays. Engineers will be
provided a tool to predict potential for water production in new wells.
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Production and reproduction performance of Jersey and Fleckvieh × Jersey cows in a pasture-based systemGoni, Sindisile 04 1900 (has links)
Thesis (MScAgric)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: Genetic selection for high milk production, type and appearance for the last 50 years has suppressed
secondary traits such as reproductive performance, productive life, health and survivability in the pure
milk breeds. The economic importance of these secondary traits in dairy production systems is the
basis for the interest seen in crossbreeding. The problem of growth rate of heifers, cow fertility,
reduced disease resistance and small body frame for beef production in Jerseys can be improved by
crossing Jerseys with dual purpose breeds, such as Fleckviehs which possess a more beef potential.
Against this background, this study aimed at comparing the production and reproduction of Jersey and
Fleckvieh × Jersey cows in a pasture-based system.
Milk recording was done according to standard milk recording procedures. Milk production (milk, fat,
and protein yield) was adjusted to 305 days of lactation and corrected for age at calving. Effects of
breed, parity, month and year were estimated for milk, fat and protein yield as well as fat and protein
percentage using general linear models procedure. The fixed effects identified as having significant
effects on milk, fat and protein yield were breed, parity and year. F×J cows produced significantly more milk than J cows (6141 ± 102 vs. 5398 ± 95 kg milk). Protein and fat yield were significantly
higher in F×J (201 ± 3 and 272 ± 4 kg, respectively) than in J cows (194 ± 2 and 246 ± 3 kg,
respectively). There percentages of fat and protein differed slightly between the two breeds with the
Jersey recording slightly higher percentages (4.61 ± 0.04 and 3.62 ± 0.03 %, respectively) compared
to the F×J cows’ percentages, which were, respectively, 4.47 ± 0.04 and 3.51 ± 0.03 %. It was
concluded that F×J crossbred cows were more productive than purebred J cows probably owing to
heterotic effects.
Heifers were inseminated at 13 months of age and cows 40 days post-calving. Using insemination
records and pregnancy check results, fertility traits were analyzed and compared between the two
breeds, using analysis of variance for continuous records. Conception age was the same for both
breeds resulting in a similar age at first calving. For cows, the interval from calving to first
insemination was significantly shorter (P <0.001) in crossbred cows being 76.7 ± 2.2 days compared
to 82.4 ± 2.5 days for purebreds. A larger proportion (P < 0.001) of 0.70 for crossbred cows was
inseminated within 80 days after calving compared to 0.54 for J cows. Although the absolute number
of days between calving and conception (DO) was lower for F×J cows in comparison to J cows (104.8
± 6.8 vs. 114.8 ± 8.1days, respectively), the difference was not significant. However, the proportion of
F×J cows confirmed pregnant by 100 days in milk was 0.79, which was higher (P < 0.001) than the
0.66 for J cows. Results indicate the potential of improving reproductive performance of J cows
through crossing with dual-purpose breeds. The beef production of purebred J and Fleckvieh x Jersey (F×J) bull calves was compared, where bull
calves were reared similarly for veal, i.e. carcass weight not exceeding 100 kg, or as steers for beef to
21 months of age. In both the veal and steer production systems, the mean birth weight were higher (P
< 0.001) for crossbred in comparison to J calves and steers (33.5 ± 1.2 kg vs. 27.9 ± 1.2 kg for veal)
and (33.4 ± 0.9 kg vs. 26.9 ± 0.9 kg for steers) respectively. The live weight at 6 months of age was
163.5 ± 3.9 kg for J bull calves, which was lower (P < 0.001) than that for F×J bull calves (180.6 ± 4.0 kg). The F×J bull calves had a significantly higher average daily gain (ADG) of 0.82 ± 0.02
kg/day compared to 0.73 ± 0.02 kg/day for J bulls. Marketing age differed (P < 0.001) in the veal
production system with F×J and J bull calves marketed at 7.1 ± 0.1 and 6.3 ± 0.1 months,
respectively. End live weight at 21 months of age was significantly higher (P < 0.001) in F×J bulls
(441.4 ± 14.9 kg) than the 322.6 ± 13.4 kg in J bulls; while ADG differed (P < 0.001) between the two
breeds being 0.64 ± 0.02 and 0.46 ± 0.0 kg/day in F×J and J bull calves, respectively. Crossbred steers
had a significantly higher carcass of 206.5 ± 8.9 kg compared to 157.9 ± 8.6 kg for J steers. Results
indicate the potential of improving beef production characteristics of the J cattle through
crossbreeding. / AFRIKAANSE OPSOMMING: Genetiese seleksie vir hoë melkproduksie, tipe en voorkoms die afgelope 50 jaar het sekondêre
eienskappe soos reproduksie, produktiewe lewe, gesondheid en oorlewing onderdruk in die suiwer
melk rasse. Die ekonomiese belangrikheid van hierdie sekondêre eienskappe in melkproduksie
stelsels is die basis vir kruisteling. Probleme soos groei tempo van verse, koei vrugbaarheid, verlaagde
weerstandbiedenheid teen siektes en klein liggaam raam vir vleisproduksie in Jerseys kan verbeter
word deur die kruising van Jerseys met ' n dubbele doel rasse, soos Fleckviehs wat beskik oor beter
vleis potensiaal. Teen hierdie agtergrond, is hierdie studie daarop gemik om produksie en reproduksie
van Jersey en Fleckvieh x Jersey koeie in 'n weiveld - gebaseerde stelsel te vergelyk.
Melk opname is gedoen volgens standaard melkaantekening prosedures. Melkproduksie (melk-, veten
proteïen opbrengs) was aangepas vir 305 dae van laktasie en gekorrigeer vir kalf ouderdom. ‘n
Algemene lineêre model was gebruik om die effekte van ras, pariteit , maand en jaar op melk-, vet- en
proteïen opbrengs sowel as vet- en proteïen persentasie te bepaal. Die vaste effekte geïdentifiseer met 'n beduidende effek op melk-, vet- en proteïen opbrengs was ras, pariteit en jaar. F × J koeie het
aansienlik meer melk as J koeie (6141 ± 102 teen 5398 ± 95 kg melk) produseer . Vet opbrengs was
aansienlik hoër in F × J koeie as in J koeie (272 ± 4 246 teen ± 3 kg vet). Proteïen opbrengs was ook
aansienlik hoër in F × J koeie as J koeie (201 ± 3 vs 194 ± 2 kg proteïen). Vet en proteïen persentasies
het geneig om effens te verskil met 'n klein effek (4.61 ± 0.04 % vet en 3.62 ± 0.03 % proteïen) vir J
koeie en (4.47 ± 0.04 % vet en 3.51 ± 0.03 % proteïen) vir F × J koeie. Daar is tot die gevolgtrekking
gekom dat F × J gekruisde koeie kan meer produktief wees as suiwer J koeie weens heterotiese
effekte. Verse kunsmatig geïnsemineer was op 13 maande ouderdom en koeie 40 dae na- kalwing aangehou
was. Met behulp van bevrugting en swangerskap rekords, is vrugbaarheid eienskappe ontleed en
vergelyk tussen die twee rasse, met behulp van ontleding van variansie vir deurlopende rekords.
Ouderdom van bevrugting was dieselfde vir beide rasse wat in 'n soortgelyke ouderdomsgroep was by
eerste kalwing. Vir koeie was die interval van kalf tot eerste inseminasie aansienlik korter (P < 0.001)
vir kruisgeteelde koeie wat 76.7 ± 2.2 dae in vergelyking met 82.4 ± 2.5 dae suiwerrasse is. ‘n Groter
proporsie ( P < 0.001) van 0.70 vir gekruisteelde koeie is binne 80 dae na kalwing geïnsemineer in
vergelyking met 0.54 vir J koeie. Alhoewel die absolute aantal dae tussen kalwing en opvatting (DO)
laer was vir F × J koeie in vergelyking met J koeie (104.8 ± 6.8 teen 114.8 ± 8.1dae, onderskeidelik),
is die verskil nie betekenisvol nie. Maar die verhouding van F × J koeie wat swanger bevestig is met
100 dae in melk was 0.79, wat hoër was (P < 0.001) is as die 0.66 vir J koeie. Resultate dui daarop dat
daar potensiaal is reproduktiewe prestasie te verbeter van J koeie deur kruisteling met 'n dubbel- doel
rasse. Die vleisproduksie van suiwer J en Fleckvieh x Jersey (F × J) bulkalwers vergelyk. Die bul kalwers is
soortgelyk grootgemaak vir kalfsvleis, d.w.s karkas gewig mag nie 100 kg oorskry as bulkalwers nie, en as osse vir vleis tot 21 maande oud. In die kalwers- en os produksie stelsels, was die gemiddelde
geboorte gewig hoër (P < 0.001) vir die kruise in vergelyking met J kalwers en osse (33.5 ± 1.2 kg
teen 27.9 ± 1.2 kg vir kalwers) en (33.4 ± 0.9 kg vs . 26.9 ± 0.9 kg vir osse) onderskeidelik . Die
lewendige gewig op 6 maande ouderdom was 163.5 ± 3.9 kg vir J bulkalwers en was hoër (P < 0.001)
vir F × J bulkalwers 180.6 ± 4.0 kg. Die F × J bul kalwers het 'n aansienlik ‘n hoër gemiddelde
daaglikse toename (GDT) van 0.82 ± 0.02 kg/dag in vergelyking met 0.73 ± 0.02 kg/dag vir J bulle.
Bemarkingsouderdom verskil (P < 0.001) in die kalf produksie stelsel met F × J en J bulkalwers
bemark op 7.1 ± 0.1 en 6.3 ± 0.1 maande , onderskeidelik. Finale lewendige gewig van 21 maande
oud was aansienlik hoër 441.4 ± 14.9 kg in F × J bulle as 322.6 ± 13.4 kg in J bulle , terwyl GDT hoër
was (P < 0.001), met 0.64 ± 0.02 kg/dag en 0.46 ± 0.0 kg/dag in F × J en J bulkalwers, onderskeidelik.
Gekruisde osse het 'n aansienlik hoër karkasgewig 206.5 ± 8.9 kg in vergelyking met 157.9 ± 8.6 kg
van J osse. Resultate dui daarop dat daar potensiaal is om die beesvleis produksie-eienskappe van die
J beeste te verbeter d.m.v. kruisteling.
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Analýza a zlepšování jakosti sériové výroby ve vybrané společnosti / Analysis and improvement of serial production quality in a selected companyKlaška, Vojtěch January 2021 (has links)
This diplom thesis deals with iprovement of serial production quality in a company. The first chapter is devoted to literature research. The second is devoted to definition of product quality. The third part is focused on production process analysis. The fourth part deals with analysis of internal scrap and customer claims. The fifth part is focused on risk areas based on previous analysis. The final part includes corrective measures and preventitive actions and their financial assesment.
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Manejo da irrigação para produção de minimilho através do tanque classe AMeneghetti, Adriana Maria 28 November 2005 (has links)
Made available in DSpace on 2017-07-10T19:25:00Z (GMT). No. of bitstreams: 1
Adriana Maria Meneghetti.pdf: 723411 bytes, checksum: fc151b405deaed517334646d5726cad4 (MD5)
Previous issue date: 2005-11-28 / This research aimed on evaluating the growth and production of corn (Zea
mays L.) in order to obtain the baby corn, which was submitted to the variation
of four different depth irrigations, recorded from the culture s evapotranspiration,
based on the class A, and applied when the evapotranspiration reached these
following accumulated values: T1-15 mm, T2- 30 mm, T3- 45 mm e T4- 60 mm.
The statistical model was outlinement completely with four treatments and five
replications. Results were submitted to the statistical analysis, by the Sisvar
program (FERREIRA 2000). The analysis of variance and the averages from
the treatments were also recorded, as well as compared considering 5 % of
probability according to the Tukey test and regression analysis. The
experimental plots had about 8 m of length; the plants were separated by
0.080m among themselves and 0.70 m by rows, totalizing 100 plots to each
plot. The features regarding the growth during the culture s cycle were: plant
height (PE), foliar area (FA), leaf number (LN), foliar area index (FAI). Some
other features were analyzed regarding the production analysis as: number of
ear by plant (NEP), height of insertion of the first ear (HIFE), length of the ear
with and without straw (LEWOS), diameter of the ear with and without straw
(DEWOS), mass of the ear with and without straw (MEWOS), number of the
row of grains by ear (NRGE) and number of ear, accomplishing 360 g. There
were significant differences on production results regarding data of growing of
foliar area and foliar area index. Significant differences had been also observed
in the production of HIFE and LEWOS, and DEWOS, MEWOS and MEWOS,
NRGE and number of ear that accomplishes 360 g. There was an increase in
the depth irrigation and also in the application frequency, which implied in
greater values of foliar area, as well as in the foliar area index, number of ear by
plant, height of insertion of the first ear, number of row of grains by ear and
number of ear, accomplishing 360 g, but also lower values for height, leaf
number and length, diameter and ear s mass, with and without straw. The Best
commercial results were recorded with T1 15 mm, when using 18 % of ear.
The scheduling irrigation for baby corn must be carried out with application
when the crop evapotranspiration indicates 15 mm and 30 mm accumulated
values. It could also be understood with this trial that greater values cause
reduction on productivity. / O objetivo deste trabalho foi avaliar o crescimento e produção de milho (Zea
mays L.) para obtenção de minimilho. As parcelas em análise foram
submetidas) a quatro lâminas de irrigação determinadas a partir da
evapotranspiração da cultura, baseadas no tanque classe A e aplicadas
quando a evapotranspiração atingia os valores acumulados: T1-15 mm, T2-30
mm, T3-45 mm e T4-60 mm. O modelo estatístico utilizado foi em parcelas
subdivididas com quatro tratamentos e cinco repetições. Os resultados foram
submetidos à análise estatística, pelo programa Sisvar (FERREIRA, 2000).
Determinou-se a análise de variância e as médias dos tratamentos foram
comparadas em nível de 5 % de probabilidade pelo teste de Tukey e pela
análise de regressão. As parcelas experimentais possuíam comprimento de 8
m, compostas por plantas separadas entre si por 0,080 m e 0,70 m entre
linhas, com um total de 100 plantas por parcela. As características para a
análise de crescimento foram: estatura da planta (EP), número de folhas (NF),
área foliar (AF), índice de área foliar (IAF). Para a análise de produção foram
analisadas: número de espigas por planta (NE), estatura de inserção da
primeira espiga (EI), comprimento da espiga com palha (CECP), comprimento
da espiga sem palha (CESP), diâmetro da espiga com palha (DECP), diâmetro
da espiga sem palha (DESP), massa da espiga com palha (MECP), massa da
espiga sem palha (MESP), número de fileira de grãos por espiga (NF E-1) e
número de espigas que perfazem 360 g. Houve diferenças significativas para
os dados de crescimento nos valores de área foliar e índice de área foliar.
Também foram observadas diferenças significativas nos resultados de
produção para estatura de inserção da primeira espiga, comprimento da espiga
com e sem palha, diâmetro da espiga com e sem palha, massa da espiga com
e sem palha, número de fileiras de grãos por espiga e número de espigas que
perfazem 360 g. Um aumento nas lâminas de irrigação e na freqüência de
aplicação implicou em maiores valores de área foliar e índice de área foliar,
número de espigas, estatura de inserção da espiga, número de fileira de grãos
por espiga e o número de espigas em 360 g, e menores valores para estatura,
número de folhas e comprimento, diâmetro e massa da espiga com e sem
palha. Os melhores resultados comerciais obtidos foram com o T1-15 mm, cujo
aproveitamento foi de 18 % das espiguetas. O manejo da irrigação do
minimilho deve ser realizado com aplicação quando a evapotranspiração da
cultura indicar valores acumulados de 15 mm a 30 mm. Valores maiores
ocasionam redução na produtividade.
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Manejo da irrigação para produção de minimilho através do tanque classe AMeneghetti, Adriana Maria 28 November 2005 (has links)
Made available in DSpace on 2017-05-12T14:48:21Z (GMT). No. of bitstreams: 1
Adriana Maria Meneghetti.pdf: 723411 bytes, checksum: fc151b405deaed517334646d5726cad4 (MD5)
Previous issue date: 2005-11-28 / This research aimed on evaluating the growth and production of corn (Zea
mays L.) in order to obtain the baby corn, which was submitted to the variation
of four different depth irrigations, recorded from the culture s evapotranspiration,
based on the class A, and applied when the evapotranspiration reached these
following accumulated values: T1-15 mm, T2- 30 mm, T3- 45 mm e T4- 60 mm.
The statistical model was outlinement completely with four treatments and five
replications. Results were submitted to the statistical analysis, by the Sisvar
program (FERREIRA 2000). The analysis of variance and the averages from
the treatments were also recorded, as well as compared considering 5 % of
probability according to the Tukey test and regression analysis. The
experimental plots had about 8 m of length; the plants were separated by
0.080m among themselves and 0.70 m by rows, totalizing 100 plots to each
plot. The features regarding the growth during the culture s cycle were: plant
height (PE), foliar area (FA), leaf number (LN), foliar area index (FAI). Some
other features were analyzed regarding the production analysis as: number of
ear by plant (NEP), height of insertion of the first ear (HIFE), length of the ear
with and without straw (LEWOS), diameter of the ear with and without straw
(DEWOS), mass of the ear with and without straw (MEWOS), number of the
row of grains by ear (NRGE) and number of ear, accomplishing 360 g. There
were significant differences on production results regarding data of growing of
foliar area and foliar area index. Significant differences had been also observed
in the production of HIFE and LEWOS, and DEWOS, MEWOS and MEWOS,
NRGE and number of ear that accomplishes 360 g. There was an increase in
the depth irrigation and also in the application frequency, which implied in
greater values of foliar area, as well as in the foliar area index, number of ear by
plant, height of insertion of the first ear, number of row of grains by ear and
number of ear, accomplishing 360 g, but also lower values for height, leaf
number and length, diameter and ear s mass, with and without straw. The Best
commercial results were recorded with T1 15 mm, when using 18 % of ear.
The scheduling irrigation for baby corn must be carried out with application
when the crop evapotranspiration indicates 15 mm and 30 mm accumulated
values. It could also be understood with this trial that greater values cause
reduction on productivity. / O objetivo deste trabalho foi avaliar o crescimento e produção de milho (Zea
mays L.) para obtenção de minimilho. As parcelas em análise foram
submetidas) a quatro lâminas de irrigação determinadas a partir da
evapotranspiração da cultura, baseadas no tanque classe A e aplicadas
quando a evapotranspiração atingia os valores acumulados: T1-15 mm, T2-30
mm, T3-45 mm e T4-60 mm. O modelo estatístico utilizado foi em parcelas
subdivididas com quatro tratamentos e cinco repetições. Os resultados foram
submetidos à análise estatística, pelo programa Sisvar (FERREIRA, 2000).
Determinou-se a análise de variância e as médias dos tratamentos foram
comparadas em nível de 5 % de probabilidade pelo teste de Tukey e pela
análise de regressão. As parcelas experimentais possuíam comprimento de 8
m, compostas por plantas separadas entre si por 0,080 m e 0,70 m entre
linhas, com um total de 100 plantas por parcela. As características para a
análise de crescimento foram: estatura da planta (EP), número de folhas (NF),
área foliar (AF), índice de área foliar (IAF). Para a análise de produção foram
analisadas: número de espigas por planta (NE), estatura de inserção da
primeira espiga (EI), comprimento da espiga com palha (CECP), comprimento
da espiga sem palha (CESP), diâmetro da espiga com palha (DECP), diâmetro
da espiga sem palha (DESP), massa da espiga com palha (MECP), massa da
espiga sem palha (MESP), número de fileira de grãos por espiga (NF E-1) e
número de espigas que perfazem 360 g. Houve diferenças significativas para
os dados de crescimento nos valores de área foliar e índice de área foliar.
Também foram observadas diferenças significativas nos resultados de
produção para estatura de inserção da primeira espiga, comprimento da espiga
com e sem palha, diâmetro da espiga com e sem palha, massa da espiga com
e sem palha, número de fileiras de grãos por espiga e número de espigas que
perfazem 360 g. Um aumento nas lâminas de irrigação e na freqüência de
aplicação implicou em maiores valores de área foliar e índice de área foliar,
número de espigas, estatura de inserção da espiga, número de fileira de grãos
por espiga e o número de espigas em 360 g, e menores valores para estatura,
número de folhas e comprimento, diâmetro e massa da espiga com e sem
palha. Os melhores resultados comerciais obtidos foram com o T1-15 mm, cujo
aproveitamento foi de 18 % das espiguetas. O manejo da irrigação do
minimilho deve ser realizado com aplicação quando a evapotranspiração da
cultura indicar valores acumulados de 15 mm a 30 mm. Valores maiores
ocasionam redução na produtividade.
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Srovnání misantropní talk Show Jana Krause a filantropní talk show Marka Ebena Na plovárně / Comparing misanhropist talk show Jana Krause and philantrhropist talk show Marek Eben's Na plovárněKopřivová, Jitka January 2015 (has links)
The theoretical section of the thesis Comparison of the misanthropic Show Jana Krause and the philanthropic Mark Eben's show Na plovárně aims to characterize the talk show genre both abroad and in the Czech Republic. It briefly outlines the development of the genre and its arrival in the Czech television stations. It also gives a definition of a presenter, describes the ways of communication, construction of the interviews with the guests, their selection, introduces Jan Kraus and Marek Eben and characterises both talk shows - Na Plovárně and Show Jana Krause. The practical section deals with an analysis of production in which interviews with representatives of both production teams are analysed. A qualitative analysis aims to answer the question: "How do the philanthropic and misanthropic concepts of the talk show differ, from the perspective of content and production intentions?" The conclusion contains a summary of the collected data.
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[en] PRODUCTION PLANNING AND CONTROL IN A MOTORCYCLE PARTS FACTORY: A CASE STUDY / [pt] PLANEJAMENTO E CONTROLE DA PRODUÇÃO EM UMA FÁBRICA DE PEÇAS PARA MOTOCICLETAS: UM ESTUDO DE CASOMARCELO JOSE LAVORATO CORDEIRO 24 April 2006 (has links)
[pt] Esta dissertação trata da análise e projeto de um sistema
de planejamento e
controle da produção para uma linha de fabricação de raios
e niples para
motocicletas, visando garantir um nível de atendimento
desejado, melhor
utilização das instalações, com baixo investimento em
estoques. Utilizou-se uma
metodologia investigativa para se conhecer os seis
principais elementos que
influenciam o projeto de um sistema de planejamento e
controle da produção: o
produto; o processo e as instalações; a demanda; o
mercado; a estratégia
competitiva e o desempenho do sistema atual. Identificou-
se nesta análise que
dois problemas principais causam o baixo desempenho do
sistema atual de
planejamento e controle da produção, são eles: (a) o
dimensionamento dos lotes
de fabricação e (b) a sincronia entre as etapas
produtivas. Para resolver o primeiro
problema, a dificuldade para determinar o custo de
preparação foi contornada
determinando-se tamanhos de lotes tais que, estando nas
proporções ótimas,
resultem num investimento total em estoque de ciclo igual
a uma meta
determinada por considerações gerenciais. Para o problema
de sincronia entre as
etapas produtivas propôs-se a utilização dos conceitos do
MRP II e um
planejamento agregado que garanta a viabilidade do plano
de materiais e serviços
necessários para a produção. Foi também sugerido um
controle JIT para os
produtos de demanda mais substancial e estável. / [en] This thesis addresses the analysis and design of a
production planning and
scheduling system for motorcycle-spokes and nipples
production lines, with the
objective of ensuring a desired customer service level,
coupled with high
utilization of the facilities and low investment in
stocks. The investigative
methodology used took into account the six key elements
that influence the
project of a production planning and scheduling system,
namely: the product, the
manufacturing facilities, the sales, the market, the
competitive strategy and the
actual system performance. The analysis identified two
main problems that caused
the low performance of the current production planning and
scheduling system,
they are: (a) the production lot size and (b) the
synchronism among the
manufacturing stages. In solving the first problem, the
difficult determination of
setup cost was circumvented by setting lot sizes such that
they are in optimal
proportions and the resulting total investment in cycle
stock equals a goal set
through managerial considerations. For the synchronization
among manufacturing
stages, it was suggested to use MRP II concepts, and an
aggregate production
planning to assure the materials and services required for
production. It was also
suggested the use of JIT for controlling products with
more substantial and stable
demand.
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Unobserved heterogeneity in productivity analysis of panel data: applications to meat chain firms and global growth in agricultureHoltkamp, Jonathan 12 February 2015 (has links)
No description available.
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