Designers of collaboration mandates for sustainable natural resource management must address public agencies’ concerns about losing autonomy and influence

With climate change now influencing entire regions, there is a greater need for organizational collaboration to manage natural resources sustainably. Using California’s Sustainable Groundwater Management Act, which mandates collaboration between groundwater sustainability agencies, as a case study, Brian An and Shui-Yan Tang examine what drives integrative collaborations between agencies. They find that agencies are more likely to joint integrative collaborations if their mission addresses a broader focus, their core stakeholder groups have less concentrated interests in the policy issue, and their organizational culture is less rigid and risk averse

Using Common-Pool Resource Principles to Design Local Government Fiscal Sustainability

This article analyzes local government fiscal sustainability as a common-pool resource (CPR) problem. By comparing the experiences of Los Angeles County, San Bernardino City, and San Bernardino County, the analysis applies a framework developed from three decades of CPR research to show the importance of six micro-situational variables — communications with the full set of participants, known reputations of participants, high marginal per capita return, entry or exit capabilities, longer time horizon, and agreed-upon sanctioning capabilities — in shaping collective-action dynamics and building the trust and reciprocity among stakeholders needed for achieving fiscal sustainability. The underlying contextual conditions for these micro-situational variables vary based on specific socio-economic and political settings, but the findings suggest that institutions and processes can be designed based on several well-tested principles in CPR governance to encourage stakeholders to look beyond their immediate self-interests and to make decisions that account for the community’s long-term fiscal sustainability

A spectral line survey of IRC +10216 between 13.3 and 18.5 GHz

A spectral line survey of IRC +10216 between 13.3 and 18.5 GHz is carried out using the Shanghai Tian Ma 65 m Radio Telescope (TMRT-65m) with a sensitivity of < 7 mK. Thirty-five spectral lines of 12 different molecules and radicals are detected in total. Except for SiS, the detected molecules are all carbon-chain molecules, including HC3N, HC5N, HC7N, HC9N, C6H, C6H-, C8H, SiC2, SiC4, c-C3H2 and l-C5H. The presence of rich carbon-bearing molecules is consistent with the identity of IRC +10216 as a carbon-rich AGB star. The excitation temperatures and column densities of the observed species are derived by assuming a local thermodynamic equilibrium and homogeneous conditions.Comment: This is the authors' version of the manuscript; 16 pages, 5 figures, 6 tables; Accepted for publication in A&A 8/17/201

Irrigation management for rice using geographic information systems

Indicators and techniques of management system are important to evaluate the irrigation system. This study involves the evaluation of the management of an irrigation system spatially and temporally using Geographical Information Systems. It has great practical and application prospects, which can break down the single search method, and share graphics and databases and to present the results spatially on a map involved an efficient combination of information databases in rice irrigation system

4,9,12,15-Tetra­oxa-3,5,8,10,14,16-hexa­aza­tetra­cyclo­[11.3.0.02,6.07,11]hexa­deca-1(16),2,5,7,10,13-hexaen-3-ium-3-olate monohydrate

The organic mol­ecule in the title monohydrate, C6N6O5·H2O, presents an almost planar configuration, the greatest deviation from the least-squares plane through the atoms being 0.061 (1) Å for the O atom within the seven-membered ring. Each water H atom is bifurcated, one forming two O—H⋯N hydrogen bonds and the other forming O—H⋯N,O hydrogen bonds. The result of the hydrogen bonding is the formation of supra­molecular layers with a zigzag topology that stack along [001]

Particle Deposition in Microfluidic Devices at Elevated Temperatures

In microchannels, interaction and transport of micro-/nanoparticles and biomolecules are crucial phenomena for many microfluidic applications, such as nanomedicine, portable food processing devices, microchannel heat exchangers, etc. The phenomenon that particles suspended in liquid are captured by a solid surface (e.g., microchannel wall) is referred to as particle deposition. Particle deposition is of importance in numerous practical applications and is also of fundamental interest to the field of colloid science. This chapter presents researches on fouling and particle deposition in microchannels, especially the effects of temperature and temperature gradient, which have been frequently ‘ignored’ but are important factors for thermal-driven particle deposition and fouling processes at elevated temperatures

The width-flux relation of the broad iron line during the state transition of the black hole X-ray binaries

The observation of varying broad iron lines during the state transition of the black hole X-ray binaries (BHXBs) have been accumulating.In this work, the relation between the normalized intensity and the width of iron lines is investigated, in order to understand better the variation of iron lines and possibly its connection to state transition. Considering the uncertainties due to ionization and illuminating X-rays, only the effects of geometry and gravity are taken into account. Three scenarios were studied, i.e., the continuous disk model, innermost annulus model, and the cloud model. As shown by our calculations, at given iron width, the line flux of the cloud model is smaller than that of the continuous disk model; while for the innermost annulus model, the width is almost unrelated with the flux. The range of the line strength depends on both the BH spin and the inclination of the disk. We then apply to the observation of MAXI J1631-479 by NuSTAR during its decay from the soft state to the intermediate state. We estimated the relative line strength and width according to the spectral fitting results by Xu et al.(2020), and then compared with our theoretical width-flux relation. It was found that the cloud model was more favored. We further modeled the iron line profiles, and found that the cloud model can explain both the line profile and its variation with reasonable parameters.Comment: 7 figures, 12 pages, accepted for publication in RA