Hasil untuk "Industry"

Daron Acemoglu, P. Restrepo

We study the effects of industrial robots on US labor markets. We show theoretically that robots may reduce employment and wages and that their local impacts can be estimated using variation in exposure to robots—defined from industry-level advances in robotics and local industry employment. We estimate robust negative effects of robots on employment and wages across commuting zones. We also show that areas most exposed to robots after 1990 do not exhibit any differential trends before then, and robots’ impact is distinct from other capital and technologies. One more robot per thousand workers reduces the employment-to-population ratio by 0.2 percentage points and wages by 0.42%.

G. Phillips, Gerard Hoberg

M. Goos, A. Manning, A. Salomons

E. Bartelsman, J. Haltiwanger, S. Scarpetta

This paper combines different strands of the productivity literature to investigate the effect of idiosyncratic (firm-level) policy distortions on aggregate outcomes. On the one hand, a growing body of empirical research has been relating cross-country differences in key economic outcomes, such as productivity or output per capita, to differences in policies and institutions that shape the business environment. On the other hand, a branch of empirical research has attempted to shed light on the determinants of productivity at the firm level and the evolution of the distribution of productivity across firms within each industry. In this paper, we exploit a rich source of data with harmonized statistics on firm level variation within industries for a number of countries. Our key empirical finding is that there is substantial variation in the within-industry covariance between size and productivity across countries, but this covariance varies significantly across countries and is affected by the presence of idiosyncratic distortions. We develop a model in which heterogeneous firms face adjustment frictions (overhead labor and quasi-fixed capital) and idiosyncratic distortions. We show that the model can be readily calibrated to match the observed cross-country patterns of the within-industry covariance between productivity and size and thus help to explain the observed differences in aggregate performance.

J. Howkins

David H. Autor, David Dorn, Gordon Hanson et al.

M. Porter

P. Aghion, N. Bloom, R. Blundell et al.

H. Demsetz, K. Lehn

M. Russo, P. Fouts

Margaret A. Peteraf

J. Urry

B. King

Donald A. Duchesneau, W. Gartner

Wanying Zhang, Jing Wang, Geng Qin et al.

The shipping industry, responsible for transporting 90% of global goods, is a major source of pollution and greenhouse gas (GHGs) emissions. In response to the increasingly stricter global and regional emission control regulations, the maritime industry has adopted various operational and technical measures to improve vessel energy efficiency so as to reduce emissions. However, these measures might not be able to effectively address the core issue of emissions, which arises from a heavy reliance on carbon-intensive energy sources. To reduce the emissions from the whole shipping industry more fundamentally, this review evaluates the viability of five alternative marine fuels — liquefied natural gas (LNG), methanol, ammonia, biofuel, and hydrogen — as potential solutions for maritime decarbonization. This review adopts the systematic search flow (SSF) approach, using iterative search refinement and thematic analysis for a structured synthesis of maritime alternative fuel literature. It first introduces each type of alternative fuel with an emphasis on production methods and sources, which are distinctively categorized by “color.” Following this, a comprehensive comparison of the fuels is presented, focusing on technical feasibility, economic viability, emission reduction capabilities, availability, and safety considerations. The practical application of these fuels is further explored through an analysis of their adoption in operational fleets and new orders, as well as the readiness of port infrastructure to support these changes. This review also examines the role of alternative fuels in the development of green shipping corridors, underscored by an analysis of green shipping finance initiatives. The findings provide valuable insights into the viability of these fuels, supporting the International Maritime Organization (IMO)’s 2050 decarbonization goals and paving the way towards zero emissions in global shipping.

Hua Xie, Yuhang Wu, Jianan Yin et al.

With China’s low-altitude economy becoming a strategic emerging industry, the rapid growth of UAV applications demands higher efficiency in low-altitude airspace utilization and safety management. However, existing studies lack unified grid division standards and refined methods to evaluate capacity for complex urban low-altitude airspace. This study is devoted to developing a methodology for determining safe distances and assessing the throughput capacity of transport systems. The work is based on a multi-criteria assessment that takes into account four significant indicators. The application of the Pareto optimization principle made it possible to identify the most effective compromise solutions. A collision probability model with random UAV(Unmanned Aerial Vehicle) headings was proposed to determine safety separations, and a grid capacity simulation model with saturation judgment and convergence verification was established. The optimal grid granularity was identified as 20 m. Safety separations for DJI M300RTK, Mavic 3Pro, and Air 3S were 104 m, 86 m, and 47 m, respectively. Saturated capacity stabilized within 106–116 s, with stable values of 1.022, 0.961, and 1.023 drones/min for the three UAV models. The results of the study contain key conclusions about traffic capacity and suggest ways to optimize it. Conclusions: This study provides a theoretical framework for airspace resource optimization and UAV path planning, offering quantifiable benchmarks to evaluate and manage urban low-altitude airspace.

M. A. Vishnyakova, R. A. Shaukharov, N. V. Kocherina et al.

Background. Guar (Cyamopsis tetragonoloba (L.) Taub.) is a leguminous crop plant of tropical origin that has gained unprecedented popularity in recent years due to the presence of gum in its seeds. The use of guar gum in the oil and gas industry gives the crop strategic importance. This was the reason for its introduction to the Russian Federation (RF) at the beginning of the 21st century and for the active breeding of domestic cultivars. The demand for the guar collection has increased dramatically, serving as an impetus for its active study.Materials and methods. The materials of the study were guar accessions from the VIR collection: 50 accessions in 2023, and 30 most productive of them in 2024. The accessions were phenotyped for 13 traits important for breeding at Volgograd Experiment Station of VIR. The indicator of early maturity was assessed by indirect methods. Statistical processing of the research results was performed using the Statistica 13.3 software package.Results. Seed productivity of guar accessions was analyzed, its structure and interrelations among its defining characteristics. Differentiation of the guar gene pool for the studied traits was revealed. The most productive accessions were identified. Previously obtained data on the relationship of guar collection accessions to the photoperiod served as a basis for proposing a modified algorithm for determining the photoperiod sensitivity of accessions as an indirect indicator of their earliness.Conclusion. The data obtained for guar accessions from the VIR collection under the conditions of the Russian Federation will make it possible to use this germplasm effectively as source material for breeding domestic cultivars.

Rengasamy Anbazhakan, Xin-Meng Zhu, Neng-Qi Li et al.

<i>Malania oleifera</i> Chun & S.K. Lee, an endemic monotypic species that belongs to the family Olacaceae, is under continuous pressure of decline owing to several ecological and physiological factors. The present study aimed to establish an efficient in vitro protocol for callus-mediated indirect somatic embryogenesis in <i>M. oleifera</i> by alleviating tissue browning. Internodes and leaves obtained from seedlings were used as explants. Antioxidant pre-treatment (ascorbic acid, AA) followed by different carbon sources (sucrose, maltose, glucose, and fructose) and plant growth regulators in various concentrations and combinations were employed in Woody Plant Medium (WPM) to alleviate explant browning and induce callus formation from the explants. AA pre-treatment and subsequent culture on maltose at a concentration of 116.8 mM were optimal for controlling phenolic exudation on >90% of both explants. The highest responses of 53.77% and 57.43% for embryogenic calli were induced from internode and leaf explants, respectively. The highest responses, 85.22% and 93.80%, were observed for somatic embryos that matured into the globular, heart-shaped and torpedo stages at different percentages on NAA 2.5 mg/L in combination with BA 1.0 mg/L for both explants. The matured somatic embryos were finally germinated at a maximum concentration of GA₃, 2.0 mg/L. All plantlets were successfully hardened and acclimatized under culture room conditions and then transferred to the greenhouse. The current study suggests an efficient protocol for indirect somatic embryogenesis by alleviating phenolic exudation from the explants of <i>M. oleifera</i>. This first successful report of in vitro culture establishment in <i>M. oleifera</i> may offer an effective alternative measure to conserve this species and provide a system for analyzing bioactive chemicals and for use in the oil industry.

G. R. Fick, J. R. Brent Ritchie

Tomas Blecha, Martin Hirman, Jiri Navratil

This article deals with the issue of assembling conventional SMD components on textile substrates using UV-curable non-conductive adhesives. This technology is easily applicable in the textile industry. It thus enables the easy and fast production of e-textiles that are equipped with conventional electronic components or even entire electronic modules. The article describes the principle of this innovative technology. Furthermore, comprehensive results of testing the effect of mechanical stress, chemical cleaning, and climatic changes on e-textiles with assembled SMD components on the change in contact resistance are presented here. The results show that this technology can be used for assembling and encapsulating SMD components on a textile substrate in the realization of e-textiles.