Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 104 for “"Clutches"”.
-
High-Torque Capacity Compliant Centrifugal Clutches
… high-torque-capacity floating opposing arm clutches that are manufactured with standard economical manufacturing processes, while maintaining critical performance characteristics. Contact engagement speed and torque capacity models were created for the Hoffco-Comet, floating-opposing-arm …
-
Thermomechanical Stability of Automotive Clutches and Brakes
<p>Finite element analyses were performed to evaluate the stability thermal buckling existing in clutch disks. The commercial software ABAQUS had been used. It was discovered that monotonically increasing thermal loads constantly result in axisymmetric buckling modes. When the maximum values of …
-
Compliant Centrifugal Clutches: Design, Analysis, and Testing
… developed and verified against four prototype clutches. Additional novel designs devel-oped through this work have lower torque capacities, but also show good potential because of other unique characteristics. All of the designs were prototyped and tested to measure their torque-speed …
-
An Investigation of Compliant Over-running Ratchet and Pawl Clutches
… be used to design over-running ratchet and pawl clutches with reduced part count, lower assembly and manufacturing time while maintaining functionality. An extension of the theory to the micro regime is also briefly addressed. The results of the research show that the ratchet and pawl type of …
-
Selected aspects of common tern reproductive biology
… Colborne, Ontario in 1976. In general three egg clutches hatched better than two egg clutches and early started clutches hatched eggs and fledged chicks better than late clutches; the fledging success of two and three egg clutches was similar. Early clutches took longer to hatch and hatched more …
-
Seasonal variation in the reproductive biology of the ring -billed gull (Larus delawarensis)
… Park, Ontario, in 1976 and 1977. Early started clutches (comprising the majority of clutches on Gull Island) in 1977 produced more chicks per nest (2.20 ± 0.09) than late started clutches (0.86 ± 0.13) as a result of reductions in mean clutch size, hatching success and fledging success with date …
-
Investigating the possible change in breeding strategy of African black oystercatchers
… in frequency of larger threeand even four-egg clutches has occurred over the last few decades. By analysing extensive historical nest records dating back five decades I verified the occurrence of this increase in three-egg clutches over many of the sites within their breeding range. As African …
-
Nesting Ecology of the Ring-necked Pheasant in Eastern South Dakota
… was 8.6 for all nests and 10.8 for nests where clutches hatched. Clutch sizes declines as the nesting season progressed. Fertility of eggs in nests where clutches hatched was 96 percent. Hatching success varied between years with 21 percent of 111 clutches in nests hatching in 1973 and 28 …
-
Breeding parameters of great cormorants (Phalacrocorax carbo carbo) at mixed species colonies on Prince Edward Island, Canada
… exhibited a seasonal decline. Four- and 5-egg clutches represented the majority (75%) of all P. CCUibo clutches at Durell Point in 1977 and had the highest reproductive success (0.48 and 0.43 chicks fledged per egg laid respectively). Smaller clutches produced small broods with significantly …
-
Finite Element Analysis of Thermal-Mechanical Instabilities in Nonmetallic Friction Composite Material
… The topic has been extended into brakes and clutches which are two of the most common sliding systems most susceptible to thermal buckling and thermoelastic instability (TEI), where thermal buckling and thermoelastic instability are two sub-categories of thermal-mechanical instability. …
-
REPRODUCTIVE CHARACTERISTICS OF AMERICAN COOTS (FULICA AMERICANA) IN NORTHERN ARIZONA.
… in spikerush at seasonal wetlands laid larger clutches than coots nesting in bulrush at the semipermanent wetland. Better nesting success was related to better vegetative concealment of the nest from crows and ravens. Smaller territories and larger eggs among nests in bulrush were related to …
-
Nest emergence phenology of the Northern Map turtle (Graptemys geographica) near its northern range limit
… survival rate was 70% and 65% for overwintering clutches. 25% of clutches emerged in the fall and 75% of clutches remained in the nest over winter. I found that winter nest temperature below a threshold of -8°C negatively impacted the survival of overwintering clutches. Most notably, I found that …
-
Nesting Success and Parental Behavior of the Prothonotary Warbler (Protonotaria Citrea) in Southwestern Missouri
… loss of all young and eggs for that year. First clutches were larger than second clutches. Observations suggest females may contribute more to the care of offspring, in terms of foraging and fecal sac dispersal. Male singing rates did not differ significantly through laying, incubation and the …
-
The ontogeny of display behavior in Sceloporous undulatus hyacinthinus (Sauria: iguanidae)
… of 36 Sceloporus undulatus hyacinthinus from 8 clutches were recorded on video tape from the day of hatching to adult size during 1978, 1979, and 1980. Nine hundred forty-one displays were analyzed frame by frame, and durations of display units were calculated to the nearest 0.01 s. From the day …
-
Evaluation of Giant Canada Goose Restoration in Western South Dakota
… sites, but no species was preferred. Thirty-two clutches has 158 eggs during 1970, and 50 clutches had 273 eggs during 1971; mean clutch size was 4.9 eggs in 1970 and 5.5 in 1971. Clutches ranged from 2 to 9 eggs during the 2-year period. Clutches of 1 to 4 eggs had 45.5 percent hatchability, and …
-
Friction Characteristic Prediction within a Carbon-Carbon Race Clutch
Clutches are devices for disengaging the connection between the driveshafts and power units, and hence transferring rotational energy. Two inertias travelling with different angular velocities are brought to the same speed by engaging the clutch. The dissipation of energy during the operation …
-
Reproductive limitation in coastal ospreys (Pandion haliaetus): an ecological and an evolutionary perspective
… explanation. Females laying modal 3-egg clutches fledged nearly as many young as those laying 4 eggs. Pairs with 4-egg clutches showed more yearly variability in reproductive success than those with clutches of 3 eggs; rarely did pairs fledge 4 young. Males in pairs given enlarged broods …
-
Salamander Mating Behaviors and Their Consequences for Individuals and Populations
… of sire number for 13 marbled salamander clutches based on microsatellite data from 32 hatchlings per clutch. Females mated with as many as three different males as indicated by conservative techniques. Less than half of females mated with multiple males. Based on comparative analyses, I …
-
The Reproductive Cycle of Sceloporus undulatus From Alabama Corresponding Plasma Steroid Levels and Comments on Reproductive Variation.
… Older female fence lizards had at least 3 clutches per season. Eggs were oviposited in May, June, and July. Most yearlings had either 1 or 2 clutches per season. Alabama females were similar to other southern populations examined (South Carolina; Texas ; Lordsburg, New Mexico) in that the …
-
Incubation Temperature Affects Body Size, Energy Reserves, and Sex of Hatchling Alligators
… Refuge, southwestern Louisiana, USA. Three clutches of eggs were incubated over the viable range of temperatures and the resulting hatchlings were measured and weighed. I examined sexual dimorphism of hatchling and juvenile alligators by comparing measurements and observations of the …
Page 1 of 6