Results 161 to 170 of about 26,524 (298)

Existence of solutions to a Hamiltonian system without convexity condition on the nonlinearity

Electronic Journal of Differential Equations, 2004
We study a Hamiltonian system that has a superquadratic potential and is asymptotic to an autonomous system. In particular, we show the existence of a nontrivial solution homoclinic to zero.
Gregory S. Spradlin
doaj  

Mesozoic–Cenozoic Thermochronology of the Tarim–Southern Tianshan System, NW China

Geological Journal, EarlyView.
Tectonothermal history of the Tarim–Southern Tianshan system compared with the major tectonic events at far‐field plate margins. ABSTRACT The Tarim Basin, an oil‐bearing basin in northwest China, is tectonically and sedimentologically linked to the Southern Tianshan Orogenic Belt.
Shuangfeng Zhao, Wen Chen, Jingbo Sun, Ze Shen, Jie Zhang   +4 more
wiley   +1 more source

Replacement of Ores Recorded by Textures and Chemical Compositions of Sphalerite: An Example From the Furutobe Kuroko Deposit, Akita, Japan

Geological Journal, EarlyView.
Coupled dissolution‐reprecipitation of early formed Cd‐, Fe‐, Ag‐ and Sb‐poor sphalerite through interaction with high‐temperature and high‐sulphur fugacity Cu‐rich fluids, responsible for the formation of the yellow ores, resulted in the formation of Cd‐, Fe‐, Ag‐ and Sb‐rich, heavily chalcopyrite‐diseased sphalerite and enrichment of critical metals ...
Manuel Nopeia, Ryohei Takahashi, Andrea Agangi, Pearlyn Manalo, Hinako Sato   +4 more
wiley   +1 more source

Thermochronologic Constraints on the Extensional History of the Ibex Hills, Southeastern Black Mountains, Death Valley, California

Geological Journal, EarlyView.
A. Modeled T‐t paths for samples in the northern Ibex Hills, showing steady cooling throughout much of the Cenozoic, until rapid Miocene cooling. B. Weighted mean paths for each sample in this study. Note that all show a rapid cooling event at or just after 10 Ma, which is interpreted to represent exhumation as a result of regional extenstion ...
Zachariah D. Fleming
wiley   +1 more source

Detecting rare earth elements using EnMAP hyperspectral satellite data: a case study from Mountain Pass, California. [PDF]

Sci Rep
Asadzadeh S, Koellner N, Chabrillat S.
europepmc   +1 more source

Exploring variations in potential carbon and nitrogen mineralization in managed grasslands among the diversity of soils in North Carolina

Grassland Research, EarlyView.
Under steady–state conditions, potential nitrogen mineralization in soil under grasslands is closely tied to potential carbon mineralization. This study provides supporting evidence that field–specific nitrogen fertilizer recommendations could be indicated by using a simple and rapid analysis of soil–test biological activity.
Alan J. Franzluebbers
wiley   +1 more source

Developing a Typology of Korean Women Leaders' Resistance to Their Token Status in the Workplace

Human Resource Development Quarterly, EarlyView.
ABSTRACT Despite remarkable economic development in South Korea (Korea), there are only a few women leaders, and they face challenges in the gendered workplace where organizational constraints and traditional values coexist. In a reanalysis of narratives of Korean women leaders (KWLs), using an ideal‐type analysis as a novel qualitative research method,
Yonjoo Cho, Jiwon Park, Sumi Lee, Jieun You, Sokyum Yoon   +4 more
wiley   +1 more source

Fish Remain High in Selenium Long after Mountaintop Coal Mines Close. [PDF]

Environ Sci Technol
Cooke CA, Graydon JA, Luek A, Lu X, Yu H, Le XC, Reichert M.   +6 more
europepmc   +1 more source

Seasonal Spatial Population Density Distribution Dynamics of Lynx and Ungulate Prey in Cold‐Temperate Coniferous Forests 寒温带针叶林猞猁和有蹄类猎物种群密度空间分布的季节性动态研究

Integrative Conservation, EarlyView.
This study used camera trap data from 6 years between 2016 and 2021 and generalized linear mixed models to explore the factors that influence the spatial density distribution of lynx and its prey populations in warm and cold seasons in Inner Mongolia Hanma National Nature Reserve, China.
Wentao Zhang, Heng Bao, Chenbing Chu, Hualin Du, Jian Tong, Penghui Zhai, Weihua Zhang, Yang Li, Kun Yang, Xuankai Liang, Nathan James Roberts, Guangshun Jiang   +11 more
wiley   +1 more source

Tree-ring width and δ¹⁸O-derived hydroclimatic reconstructions allow a distinction between soil and atmospheric drought in the Mountain Forests of Northeastern Iran. [PDF]

Sci Rep
Foroozan ZP, Mazaherifar MH, Aryal S, Grießinger J, Pourtahmasi K, Bräuning A.   +5 more
europepmc   +1 more source