Local spectra at impurity and neighboring sites in graphene: Resonance manifestation

2020 ◽  
Vol 46 (3) ◽  
pp. 258-263
Author(s):  
Y. V. Skrypnyk ◽  
V. M. Loktev
Keyword(s):  
Neighboring Sites

THE ROLE OF LATE PRE-CONTACT COLONIAL ENCLAVES IN THE DEVELOPMENT OF THE POSTCLASSIC UCAREO VALLEY, MICHOACAN, MEXICO

2008 ◽  
Vol 19 (2) ◽  
pp. 265-282 ◽  
Author(s):  
Christine L. Hernández ◽  
Dan M. Healan
Keyword(s):  
Source Area ◽  
Foreign Enclave ◽  
Toluca Basin ◽  
Neighboring Sites

AbstractAccording to ethnohistoric sources, northeastern Michoacan became incorporated into the eastern frontier of the Tarascan empire during the mid-1400s. At that time, the region was multiethnic in character, with enclaves of foreigners living within communities as well as making up whole communities. Recent investigation in the Ucareo-Zinapecuaro source area uncovered evidence of an earlier foreign enclave consisting of two settlements in the Ucareo Valley whose ceramics are distinct from those of neighboring sites while indistinguishable from those of Epiclassic Huamango in the Acambay region of the Toluca Basin. The implications of these data alongside Ucareo obsidian exploitation and its role in the construction of the Protohistoric Tarascan–Aztec frontier are considered along with the results of preliminary chronometric dating.

Dispersal pattern and effective population size of the beaver

2000 ◽  
Vol 78 (3) ◽  
pp. 393-398 ◽  
Author(s):  
Lixing Sun ◽  
Dietland Müller-Schwarze ◽  
Bruce A Schulte
Keyword(s):  
New York ◽  
Population Size ◽  
Effective Population Size ◽  
Castor Canadensis ◽  
Natal Dispersal ◽  
Considerable Proportion ◽  
Effective Population ◽  
Dispersal Pattern ◽  
Percentile Method ◽  
Neighboring Sites

The dispersal pattern of the beaver (Castor canadensis) was studied by intensive livetrapping, tagging, and observation in Allegany State Park and its vicinity in New York from 1984 to 1996. The majority (74%) of dispersing beavers (n = 46) initiated dispersal in a downstream direction after spring ice-out. Females dispersed significantly farther away from their natal colonies than males (10.15 ± 2.42 (SE) km vs. 3.49 ± 0.86 km). Movements to neighboring sites were common (16 of 46 dispersers), indicating that beavers, especially males, may prefer to disperse to the nearest available sites. Most (64%) natal dispersers were 2-year-olds. Three-year-olds also constituted a considerable proportion (21%) of the dispersers, but 1-year-old dispersers were relatively rare (14%). Many adults underwent secondary dispersal after successful natal dispersal in our study area. Male secondary dispersers were more inclined to take over neighboring sites than were male natal dispersers (10 of 13 vs. 3 of 13). The effective population size in a 250-km2 area was estimated to be 161-228 individuals by the areal method and 267-378 individuals by the 85th percentile method.

scholarly journals Big data analysis of mitochondrial DNA substitution models: A regression approach elucidating the effects of codon position and neighboring nucleotides

2018 ◽  
Author(s):  
Keren Levinstein Hallak ◽  
Shay Tzur ◽  
Saharon Rosset
Keyword(s):  
Mitochondrial Dna ◽  
Negative Binomial ◽  
Biological Significance ◽  
Negative Binomial Regression ◽  
Influential Factors ◽  
Codon Composition ◽  
Substitution Mechanism ◽  
Significant Difference ◽  
Dna Substitution ◽  
Neighboring Sites

AbstractWe build on the up-to-date version of Phylotree, a comprehensive and continuously updating phylogeny of global human mtDNA variations (van Oven and Kayser 2009), to better understand the substitution mechanism of the mitochondrial DNA (mtDNA) and its most influential factors. We do so by composing Poisson and negative-binomial regression models relating the rate of occurrence of mtDNA substitutions to various factors. Important factors we identify include the identity of the codon at each position, confirming previous findings about the biological significance of different codons for the same amino acid. Importantly, we also identify a significant effect of neighboring sites. This effect cannot be attributed solely to CpG pairs. A similar effect of neighboring sites was recently described for autosomal DNA substitutions, and we speculate it is related to the basic mutational mechanism itself. Once codon composition and context are taken into account, there is no significant difference in substitution rate between different genes in mtDNA.

The Pressure Impact of CO2 Storage Operations on Neighboring Sites

2010 ◽  
Author(s):  
F. Schaefer ◽  
L. Walter ◽  
H. Class ◽  
C. Müller
Keyword(s):  
Co2 Storage ◽  
Pressure Impact ◽  
Neighboring Sites

OPINION FORMATION IN SZNAJD MODEL WITH MORE COMPLEX SOCIAL IMPACT

2007 ◽  
Vol 18 (05) ◽  
pp. 767-772 ◽  
Author(s):  
ZI-RAN LIU ◽  
JIA-REN YAN
Keyword(s):  
Decision Making ◽  
Monte Carlo ◽  
Social Impact ◽  
Nearest Neighbors ◽  
Monte Carlo Step ◽  
Opinion Formation ◽  
Ising Spin ◽  
Ising Spin System ◽  
Statistical Results ◽  
Neighboring Sites

Based on the Ising spin system and the Sznajd Model (SM), we introduce a new model to study the opinion evolving in SM on square lattices by numerical simulations. In the model, a panel of four neighboring sites are randomly selected at each Monte Carlo step (MCS), around the panel there are eight nearest neighbors. To be more realistic, two basic impacts are considered in the process of the eight individuals' decision-making, i.e., the information governed by the panel of four neighboring sites and the average opinion of the whole community. It is found that our model show many useful and interesting statistical results.

scholarly journals Shallow soil effects for contrasting PGAs at nearby strong-motion stations during the 2017, Mj 5.2, southern Akita Prefecture earthquake

2021 ◽  
Vol 62 ◽  
pp. 34-46
Author(s):  
Yadab P. Dhakal ◽  
Wataru Suzuki ◽  
Takeshi Kimura ◽  
Takashi Kunugi ◽  
Shin Aoi
Keyword(s):  
Ground Motion ◽  
Epicentral Distance ◽  
Focal Depth ◽  
Strong Motion ◽  
Disaster Mitigation ◽  
Japan Meteorological Agency ◽  
Velocity Models ◽  
Wide Range ◽  
Akita Prefecture ◽  
Neighboring Sites

On September 8, 2017, an earthquake of Mj 5.2 occurred with the epicenter in southern Akita Prefecture, Japan, at 22:23 local time. According to the Japan Meteorological Agency (JMA), the focal depth was 9 km. Many strong-motion stations of K-NET and KiK-net recorded ground motions from the earthquake. The maximum horizontal vector peak ground acceleration (PGA) of approximately 136 cm/s2 was recorded at one of the KiK-net stations at an epicentral distance of about 8 km. However, despite being 37 km and 53 km far from the epicenter, two stations recorded PGAs of approximately 126 and 113 cm/s2, respectively, similar to that near the epicenter. Even though these PGAs are not rare, we found that the PGAs at the two sites strongly deviated from the median values suggested by a ground motion prediction equation (GMPE), while the nearby sites generally followed the GMPE. Available velocity models showed that shallow shear wave velocities, especially in the top 5 m, were lower (i.e., the soils were softer) at the two sites compared to those at their nearest neighboring sites. We compared the ratios of the PGAs and peak ground velocities (PGVs) at the two sites with respect to their neighboring sites for many earthquakes covering a wide range of magnitudes and azimuths. We found that the PGAs and PGVs at the two sites were systematically larger than those at the adjacent sites. Linear theoretical site amplifications using the available soil models gave peak frequencies around 6-8 Hz at the larger PGA sites. Bandpass-filtered records showed significantly larger PGAs around these frequencies at the larger PGA sites. The above results showed that local site condition is one of the major contributing factors to induce large PGAs. Furthermore, softer sites experience more substantial nonlinear site amplification than the stiffer sites when input motions exceed some threshold PGAs. This latter effect means that the softer sites can produce a variety of ground motion spectra. Nevertheless, the degree of damage to built structures depends on several factors, including the design and quality of construction. We expect that this study contributes to developing improved microzonation maps for earthquake disaster mitigation.

ELECTRICAL TRANSPORT IN ORGANIC SEMICONDUCTORS

2001 ◽  
Vol 11 (02) ◽  
pp. 585-615 ◽  
Author(s):  
I. H. CAMPBELL ◽  
D. L. SMITH
Keyword(s):  
Transport Properties ◽  
Organic Semiconductors ◽  
Electrical Transport ◽  
Disordered Systems ◽  
Carrier Transport ◽  
Low Cost ◽  
Electrical Transport Properties ◽  
Large Area ◽  
And Performance ◽  
Neighboring Sites

Organic semiconductors have processing and performance advantages for low cost and/or large area applications that have led to their rapid commercialization. Organic semiconductors are π conjugated materials, either small molecules or polymers. Their electrical transport properties are fundamentally distinct from those of inorganic semiconductors. Organic semiconductor thin films are amorphous or polycrystalline and their electronic structures consist of a distribution of localized electronic states with different energies. The localized sites are either individual molecules or isolated conjugated segments of a polymer chain. Electrical transport results from carrier hopping between neighboring sites. At room temperature, equilibration between neighboring sites of different energy is fast enough that carrier transport can be described using a mobility picture. Hopping transport in these disordered systems leads to a mobility that can depend strongly on both the electric field and carrier density. This article presents experimental measurements and theoretical analysis of the electrical transport properties of representative organic semiconductors.

Sign in / Sign up

Export Citation Format

Share Document