Results 51 to 60 of about 4,993 (263)

Syzygies and the Rees algebra

, 2008
Let a,b,c be linearly independent homogeneous polynomials in the standard Z-graded ring R≔k[s,t] with the same degree d and no common divisors. This defines a morphism P1→P2.
Wang, Haohao, Hoffman, J. William, Cox, David   +2 more
core   +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

Rees algebras of parameter ideals

, 1989
Suppose (R, m) is a Cohen-Macaulay local ring of dimension d≥2 and I is an ideal of R generated by a system of parameters. It is proved that the Rees algebra S = R[It] localized at the maximal homogeneous ideal M = (m, It) is Cohen-Macaulay with minimal ...
Verma, J.K.
core   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

Geological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang, Khin Zaw, Kakda Kret, Ivan Belousov, Kotaro Yonezu, Koichiro Watanabe, Charles Makoundi   +6 more
wiley   +1 more source

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

Beyond Tobacco Prevention: The Effects of Tobacco 21 Laws on Young Adults' Body Weight

Health Economics, EarlyView.
ABSTRACT Tobacco 21 (T21) laws effectively reduce youth tobacco use by preventing initiation. This study examines their impact on body weight among young adults aged 18–20. Using 2009–2019 Behavioral Risk Factor Surveillance System data and a two‐way fixed‐effects difference‐in‐differences (DID) design, we find limited evidence of broad weight changes ...
Qihua Qiu, Jaesang Sung
wiley   +1 more source

Mental health measures among adolescents in 12 low‐ and middle‐income countries: Measurement invariance and cross‐sectional analyses of Disrupting Harm survey data

JCPP Advances, EarlyView.
Abstract Background Nationally representative mental health data in adolescents from low‐ and middle‐income countries (LMICs) are scarce. This study aimed to examine mental health and wellbeing indicators amongst adolescents in 12 LMICs across Eastern and Southern Africa and Southeast Asia. Methods We conducted a secondary analysis of data involving 12,
Ariadna Albajara Sáenz, Sebastian Kurten, Jennifer Saxton, Daniel Kardefelt‐Winther, Tamsin Ford, Amy Orben, Simon R. White   +6 more
wiley   +1 more source

Emotional Ambivalence Contextualized: The Antecedents and Consequences of Daily Affective Profiles During Pregnancy

Journal of Organizational Behavior, EarlyView.
ABSTRACT Research has increasingly highlighted the prevalence of emotionally ambivalent experiences for employees at work, with several self‐regulatory benefits emerging. Yet we do not have a full understanding of which work‐related contexts yield generative or maladaptive consequences of emotional ambivalence.
David F. Arena Jr., Jinfeng Phoenix Chen, Allison S. Gabriel, Kristen P. Jones, Devalina Nag   +4 more
wiley   +1 more source

Rees algebras of diagonal ideals

, 2010
Given two varieties, we can construct the embedded join variety. The homogeneous coordinate ring of this variety is the special fiber ring of the diagonal ideal of the original varieties. The varieties we consider here are determinantal varieties.
Lin, Kuei-Nuan, Kuei-nuan Lin
core  

Effects of Social Capital on Career Development Competency Among Young People With Chronic Disabling Health Conditions: Mediating Role of Chronic Illness Self‐Management

Journal of Employment Counseling, EarlyView.
ABSTRACT This study explores how social capital and chronic illness self‐management influence career development competency among young people with chronic disabling health conditions (YPCDHC) in Hong Kong. Using data from 485 participants aged 15–29, path analysis showed that school/workplace social capital had the strongest positive effects on career
Steven Sek‐yum Ngai, Chau‐kiu Cheung, Yuen‐hang Ng, Pamela Pui‐yu Leung, Mike Kwun‐ting Cheung, Hanlei Du, Haoyi Guo, Yongjia He, Hiu‐lam Ngai, Laing‐ming Wong, Qiushi Zhou   +10 more
wiley   +1 more source