2,113 research outputs found
Effect of Soil Temperature and Soil Moisture on Soil Respiration of Ungrazed Grassland in Loess Plateau , Gansu
Change in Soil NH\u3csub\u3e4\u3c/sub\u3e\u3csup\u3e\u3csup\u3e+\u3c/sup\u3e\u3c/sup\u3eâN and NO\u3csub\u3e3\u3c/sub\u3e\u3csup\u3e\u3csup\u3e-\u3c/sup\u3e\u3c/sup\u3e under Different Land Use Types in the Longzhong Part of Loess Plateau
Locomotion and survival of two sympatric larval anurans, Bufo gargarizans (Anura: Bufonidae) and Rana zhenhaiensis (Anura: Ranidae), after partial tail loss
Effects of Different Land Use on Soil Organic Carbon and Microbial Biomass C in the Longzhong Part of Loess Plateau
Magnetic coupling of a rotating black hole with its surrounding accretion disk
Effects of magnetic coupling (MC) of a rotating black hole (BH) with its
surrounding accretion disk are discussed in detail in the following aspects:
(i) The mapping relation between the angular coordinate on the BH horizon and
the radial coordinate on the disk is modified based on a more reasonable
configuration of magnetic field, and a condition for coexistence of the
Blandford-Znajek (BZ) and the MC process is derived. (ii) The transfer
direction of energy and angular momentum in MC process is described
equivalently by the co-rotation radius and by the flow of electromagnetic
angular momentum and redshifted energy, where the latter is based on an
assumption that the theory of BH magnetosphere is applicable to both the BZ and
MC processes. (iii) The profile of the current on the BH horizon and that of
the current density flowing from the magnetosphere onto the horizon are given
in terms of the angular coordinate of the horizon. It is shown that the current
on the BH horizon varies with the latitude of the horizon and is not continuous
at the angular boundary between the open and closed magnetic field lines. (iv)
The MC effects on disk radiation are discussed, and a very steep emissivity is
produced by MC process, which is consistent with the recent XMM-Newton
observation of the nearby bright Seyfert 1 galaxy MCG-6-30-15 by a variety of
parameters of the BH-disk system.Comment: 24 pages, 19 figures. Accepted by Ap
Screw instability of the magnetic field connecting a rotating black hole with its surrounding disk
Screw instability of the magnetic field connecting a rotating black hole (BH)
with its surrounding disk is discussed based on the model of the coexistence of
the Blandford-Znajek (BZ) process and the magnetic coupling (MC) process
(CEBZMC). A criterion for the screw instability with the state of CEBZMC is
derived based on the calculations of the poloidal and toroidal components of
the magnetic field on the disk. It is shown by the criterion that the screw
instability will occur, if the BH spin and the power-law index for the
variation of the magnetic field on the disk are greater than some critical
values. It turns out that the instability occurs outside some critical radii on
the disk. It is argued that the state of CEBZMC always accompanies the screw
instability. In addtition, we show that the screw instability contributes only
a small fraction of magnetic extraction of energy from a rotating BH.Comment: 18 pages, 13 figures; Accepted by Ap
Enhancing Depth Completion with Multi-View Monitored Distillation
This paper presents a novel method for depth completion, which leverages
multi-view improved monitored distillation to generate more precise depth maps.
Our approach builds upon the state-of-the-art ensemble distillation method, in
which we introduce a stereo-based model as a teacher model to improve the
accuracy of the student model for depth completion. By minimizing the
reconstruction error for a given image during ensemble distillation, we can
avoid learning inherent error modes of completion-based teachers. To provide
self-supervised information, we also employ multi-view depth consistency and
multi-scale minimum reprojection. These techniques utilize existing structural
constraints to yield supervised signals for student model training, without
requiring costly ground truth depth information. Our extensive experimental
evaluation demonstrates that our proposed method significantly improves the
accuracy of the baseline monitored distillation method.Comment: 6 pages, 5 figures, references adde
Genetic variations of the porcine PRKAG3 gene in Chinese indigenous pig breeds
Four missense substitutions (T30N, G52S, V199I and R200Q) in the porcine PRKAG3 gene were considered as the likely candidate loci affecting meat quality. In this study, the R200Q substitution was investigated in a sample of 62 individuals from Hampshire, Chinese Min and Erhualian pigs, and the genetic variations of T30N, G52S and V199I substitutions were detected in 1505 individuals from 21 Chinese indigenous breeds, 5 Western commercial pig breeds, and the wild pig. Allele 200R was fixed in Chinese Min and Erhualian pigs. Haplotypes II-QQ and IV-QQ were not observed in the Hampshire population, supporting the hypothesis that allele 200Q is tightly linked with allele 199V. Significant differences in allele frequencies of the three substitutions (T30N, G52S and V199I) between Chinese indigenous pigs and Western commercial pigs were observed. Obvious high frequencies of the "favorable" alleles 30T and 52G in terms of meat quality were detected in Chinese indigenous pigs, which are well known for high meat quality. However, the frequency of the "favorable" allele 199I, which was reported to have a greater effect on meat quality in comparison with 30T and 52G, was very low in all of the Chinese indigenous pigs except for the Min pig. The reasons accounting for this discrepancy remain to be addressed. The presence of the three substitutions in purebred Chinese Tibetan pigs indicates that the three substitutions were ancestral mutations. A novel A/G substitution at position 51 in exon 1 was identified. The results suggest that further studies are required to investigate the associations of these substitutions in the PRKAG3 gene with meat quality of Chinese indigenous pigs, and to uncover other polymorphisms in the PRKAG3 gene with potential effects on meat quality in Chinese indigenous pigs
Calcium/Calmodulin-Dependent Protein Kinase IV Mediates IFN-Îł-Induced Immune Behaviors in Skeletal Muscle Cells
Modular co-evolution of metabolic networks
The architecture of biological networks has been reported to exhibit high
level of modularity, and to some extent, topological modules of networks
overlap with known functional modules. However, how the modular topology of the
molecular network affects the evolution of its member proteins remains unclear.
In this work, the functional and evolutionary modularity of Homo sapiens (H.
sapiens) metabolic network were investigated from a topological point of view.
Network decomposition shows that the metabolic network is organized in a highly
modular core-periphery way, in which the core modules are tightly linked
together and perform basic metabolism functions, whereas the periphery modules
only interact with few modules and accomplish relatively independent and
specialized functions. Moreover, over half of the modules exhibit
co-evolutionary feature and belong to specific evolutionary ages. Peripheral
modules tend to evolve more cohesively and faster than core modules do. The
correlation between functional, evolutionary and topological modularity
suggests that the evolutionary history and functional requirements of metabolic
systems have been imprinted in the architecture of metabolic networks. Such
systems level analysis could demonstrate how the evolution of genes may be
placed in a genome-scale network context, giving a novel perspective on
molecular evolution.Comment: 26 pages, 7 figure
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