Results 41 to 50 of about 173,242 (235)

Engineering Microbial Particles for Next‐Generation Biomedical Platforms

open access: yesAdvanced Science, EarlyView.
Microbe‐derived particles (MDPs), which include extracellular vesicles, outer membrane vesicles, inclusion bodies, polysaccharide particles, and virus‐like particles, represent a rapidly expanding category of bioinspired nanomaterials. With their natural origin, intrinsic biocompatibility, and highly programmable functionality, MDPs serve as a ...
Yuting Li   +7 more
wiley   +1 more source

توزیع خوشه­ های کروی در کهکشان [PDF]

open access: yesفیزیک کاربردی ایران, 2017
خوشه های کروی، جمعیت های ستاره ای پیر کهکشان ما هستند که خصوصیات بسیار منحصر به فردی را در ستاره های خود دارند. مواد اولیه ی مشابه، سن یکسان و فاصله ی یکسانی از ما خصوصیاتی هستند که در ستاره های یک خوشه وجود دارد. توزیع خوشه های کروی در کهکشان بسیار جالب
زهرا فرحزادی   +2 more
doaj   +1 more source

A dwarf nova in the globular cluster M13

open access: yes, 2011
Dwarf novae in globular clusters seem to be rare with only 13 detections in the 157 known Galactic globular clusters. We report the identification of a new dwarf nova in M13, the 14th dwarf nova identified in a globular cluster to date.
A. Dieball   +35 more
core   +3 more sources

Rotation of Hot Horizontal Branch Stars in the Globular Clusters NGC 1904, NGC 2808, NGC 6093 and NGC 7078 [PDF]

open access: yes, 2002
We present high resolution UVES+VLT spectroscopic observations of 56 stars in the extended horizontal branch (EHB) of the Galactic globular clusters NGC 1904, NGC 2808, NGC 6093, and NGC 7078.
Alejandra Recio-Blanco   +7 more
core   +2 more sources

Retinal Vessel Segmentation: A Comprehensive Review From Classical Methods to Deep Learning Advances (1982–2025)

open access: yesAdvanced Intelligent Systems, EarlyView.
Four decades of retinal vessel segmentation research (1982–2025) are synthesized, spanning classical image processing, machine learning, and deep learning paradigms. A meta‐analysis of 428 studies establishes a unified taxonomy and highlights performance trends, generalization capabilities, and clinical relevance.
Avinash Bansal   +6 more
wiley   +1 more source

Prospects and Challenges of Entrepreneurship Development in the Kurdistan Region of Iraq: An Overview

open access: yesInternational Journal of Entrepreneurial Knowledge, 2019
Entrepreneurship as a driver of innovation and economic growth plays a key role in economic development and the appearance of knowledge and innovation-based economies.
Mohammadali Zrar Mohsin   +1 more
doaj   +1 more source

The primordial and evolutionary abundance variations in globular-cluster stars: a problem with two unknowns

open access: yes, 2015
We demonstrate that among the potential sources of the primordial abundance variations of the proton-capture elements in globular-cluster stars proposed so far, such as the hot-bottom burning in massive AGB stars and H burning in the convective cores of ...
Denissenkov, Pavel   +5 more
core   +1 more source

Critical Branching Brownian Motion with Killing

open access: yes, 2015
We obtain sharp asymptotic estimates for hitting probabilities of a critical branching Brownian motion in one dimension with killing at 0 We also obtain sharp asymptotic formulas for the tail probabilities of the number of particles killed at 0.
Lalley, Steven P., Zheng, Bowei
core   +1 more source

Type II supernovae as probes of environment metallicity: observations of host HII regions [PDF]

open access: yes, 2016
Spectral modelling of SNII atmospheres indicates a clear dependence of metal line strengths on progenitor metallicity. This motivates further work to evaluate the accuracy with which these SNe can be used as metallicity indicators.
Anderson, J. P.   +12 more
core   +4 more sources

Factors Influencing the Purchase of Energy-Efficient Appliances by Young Consumers in South Africa

open access: yesFoundations of Management, 2020
Household appliances are the biggest contributor to household energy consumption and carbon dioxide emissions. One of the ways to reduce emissions and conserve energy is to increase the use of energy-efficient appliances (EEAs).
Fatoki Olawale
doaj   +1 more source

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