Collection of Yamato meteorites by the 35th Japanese Antarctic Research Expedition

The 35th Japanese Antarctic Research Expedition found 9 ordinary chondrites and 7 fragments around Camp 1 (latitude 71°32′49″S, longitude 35°24′07″E) located 5km westward from Massif C in the Yamato Mountains. In this area meteorites have not been collected previously. Meteorite surveys were also carried out along the route of the Camp migrations and around the Camp 3,although no meteorites were found. The chondrites examined microscopically may be classified into either H4 or H6 categories. The biggest chondrite (Yamato-9403) which is classified as H6 was examined magnetically

Magnetic fabric analysis of deformed rocks in the Riiser-Larsen Main Shear Zone, East Antarctica

Anisotropy of magnetic susceptibility (AMS) in deformed rocks in the Riiser-Larsen Main Shear Zone (RLMSZ) was analyzed in order to demonstrate the changes in rock magnetic properties due to deformation. Sixty-nine samples were collected at six sites from sheared gneisses and sheared dolerites. Experimental results of stepwise acquisition of isothermal remanence, demagnetization of a composite IRM and thermomagnetic measurement indicate the presence of Ti-poor titanomagnetite. Pyrrhotite also occurs characteristically in specimens with mylonitic textures. Magnetic foliations of AMS for the mylonite at three sites show good agreement with mylonitic foliation at each site. The mylonites showed enhancement of anisotropy degree from protoliths, indicating overprinting of the original magnetic fabrics. Their maximum susceptibility axes are well defined within each site, and dip about 50-60° northward. The magnetic lineation probably indicates the maximum stretching direction in the RLMSZ

The Effect of Stress Sequence on the Fatigue Strength under Program Loading

The annealed S35C carbon stetel was tested under the many-fold multiple repeated stresses in four stess levels in rotating bending. The effect of the stress sequence on fatigue lives was investigated in association with the effect of the initial stress level and the magnitude of stress levels as a whole. The number of cycles in one program block, n₀, was chosen at 3600. The results show : (1) The effects of the initial stress level and the stress sequence on the fatigue lives can not be seen, because the value of n₀ in this experiment is very small in comparison with the total number of cycles to failure. (2) When the maximum stress σ₄ is high and all the stresses are overstresses, the actual fatigue lives coincide nearly with the theoretical ones which are calculated by using the linear damage law. When σ₄ becomes low, the actual fatigue life Nf becomes samller than the theoretical one Nₜₕ, and Nf reaches the smallest value at a certain stress level. When the all stresses except σ₄ are understresses, Nf becomes equal to or larger than Nₜₕ

Service Load Counting and Fatigue Life Estimation by the Full Wave Count Method

Different methods have been already proposed in order to find load frequencies of service loads, and only peaks or ranges are given main attention in most of them. From the standpoint of fatigue, however, service loads should be analyzed in consideration not only of their peaks or ranges but also of their means. There is proposed in this paper the full wave count method which analyzes a service load-time history into individual proper full wave with a corresponding mean value. There is also discussed how to carry out a program fatigue test according to the count result for the fatigue life estimation

Longevity-associated NADH Dehydrogenase Subunit-2 237 Leu/Met Polymorphism Modulates the Effects of Daily Alcohol Drinking on Yearly Changes in Serum Total and LDL Cholesterol in Japanese Men

Reduced nicotinamide adenine dinucleotide (NADH) dehydrogenase subunit 2 237 leucine/methionine (ND2-237 Leu/Met) polymorphism, is reportedly associated with longevity in the Japanese population. The ND2-237Met genotype may exert resistance to atherogenic diseases, such as myocardial infarction or cerebrovascular disorders. To investigate whether ND2-237 Leu/Met polymorphism is associated with yearly changes in serum lipid levels, we conducted a longitudinal study of 107 healthy Japanese male subjects. Analysis of covariance revealed that the interaction between the ND2-237 Leu/Met genotypes and habitual drinking was significantly associated with yearly changes in serum total cholesterol (TC) and low-density lipoprotein cholesterol (LDLC) levels (p0.036 and p0.006, respectively). In multiple regression analysis, daily drinking was significantly and positively associated with yearly changes in serum LDLC levels in men with ND2-237Met (p0.026). After adjusting for covariates, yearly changes in serum LDLC levels were significantly lower in non-daily drinkers with ND2-237Met than in those with ND2-237Leu (p0.047). These results suggest that ND2-237Met has a beneficial impact on yearly changes in serum LDLC in non-daily drinkers but not in daily drinkers.</p