Aquatic biosystems: reactions and actions

Aquatic biological systems are a critical part of the structure and function of earth's biosphere. While attention of the scientific community is often focused on the reaction of biological systems to changes in the environment, these systems also have profound effects, or actions, on the environment. Throughout the evolutionary history of earth, the rise and/or fall of different aquatic biosystems has impacted the character of the biosphere. At no time have environmental changes been more important to all life on earth than in the modern era, which underscores the need for the new journal, Aquatic Biosystems. We welcome submission of original research manuscripts, reviews, and commentaries to the journal

KAMPANYE POLITIK VICTORY-JOS MELALUI MEDIA SOSIAL PADA PEMILIHAN KEPALA DAERAH PROPINSI NUSA TENGGARA TIMUR TAHUN 2018

The current political campaign has developed taking advantage of technological developments. New campaign platforms are provided by technological sophistication that makes it easier for people to access social media, which is then used by political elites to maximize social media opportunities for campaigns. The electoral strategy is needed by every candidate participating in the general election, as well as by candidates for regional leaders who participate in the regional election campaign, including Victory-Joss, who participated in the 2018 NTT Pilgub Competition. must try to reach the entire NTT region, which is an island province, in order to introduce itself, to convey political messages to almost all NTT people so that they can become better known and all their best intentions for NTT can become known. This requires an expansion of Victory Joss campaign teams, social media as one of the Victory Joss campaign packages, to reach the broader community. The aim of this study is to find out and explain how Victory-Jos became politically active in the regional elections in the province of East Nusa Tenggara in 2018 via social media. As research, qualitative research is used. The data in this study was collected through interviewing techniques and document collection. The results showed that the campaign strategy through online media running on the Victory Joss package was to form a media team using social media as a media campaign for Victory Joss packages. This media team then went through the Agenda Setting, Framing, and Priming mechanisms to pack The focus of the Victory Joss package to be promoted on social media includes product orientation, candidate orientation, and ideology orientation, to promote positive public opinion on Victory-Jos to influence. Social Media Reached Victory-Jos's winning team consists of five social media commonly used by the community, namely Facebook: @ Victoryjoss4NTT, Twitter: @Victory_joss, Instagram: @Victory_joss, and Youtube: Victory-Joss

The Spectral Variability of Cygnus X-1 at MeV Energies

In previous work, we have used data from the first three years of the CGRO mission to assemble a broad-band $\gamma$-ray spectrum of the galactic black hole candidate Cygnus X-1. Contemporaneous data from the COMPTEL, OSSE and BATSE experiments on CGRO were selected on the basis of the hard X-ray flux (45--140 keV) as measured by BATSE. This provided a spectrum of Cygnus X-1 in its canonical low X-ray state (as measured at energies below 10 keV), covering the energy range from 50 keV to 5 MeV. Here we report on a comparison of this spectrum to a COMPTEL-OSSE spectrum collected during a high X-ray state of Cygnus X-1 (May, 1996). These data provide evidence for significant spectral variability at energies above 1 MeV. In particular, whereas the hard X-ray flux {\it decreases} during the high X-ray state, the flux at energies above 1 MeV {\it increases}, resulting in a significantly harder high energy spectrum. This behavior is consistent with the general picture of galactic black hole candidates having two distinct spectral forms at soft $\gamma$-ray energies. These data extend this picture, for the first time, to energies above 1 MeV.Comment: 5 pages, 4 figures, to be published in AIP Conf. Proc., "The Fifth Compton Symposium

Extreme Weather Events and Climate Variability Provide a Lens to How Shallow Lakes May Respond to Climate Change

Shallow lakes, particularly those in low-lying areas of the subtropics, are highly vulnerable to changes in climate associated with global warming. Many of these lakes are in tropical cyclone strike zones and they experience high inter-seasonal and inter-annual variation in rainfall and runoff. Both of those factors strongly modulate sediment–water column interactions, which play a critical role in shallow lake nutrient cycling, water column irradiance characteristics and cyanobacterial harmful algal bloom (CyanoHAB) dynamics. We illustrate this with three examples, using long-term (15–25 years) datasets on water quality and plankton from three shallow lakes: Lakes Okeechobee and George (Florida, USA) and Lake Taihu (China). Okeechobee and Taihu have been impacted repeatedly by tropical cyclones that have resulted in large amounts of runoff and sediment resuspension, and resultant increases in dissolved nutrients in the water column. In both cases, when turbidity declined, major blooms of the toxic CyanoHAB Microcystis aeruginosa occurred over large areas of the lakes. In Lake George, periods of high rainfall resulted in high dissolved color, reduced irradiance, and increased water turnover rates which suppress blooms, whereas in dry periods with lower water color and water turnover rates there were dense cyanobacteria blooms. We identify a suite of factors which, from our experience, will determine how a particular shallow lake will respond to a future with global warming, flashier rainfall, prolonged droughts and stronger tropical cyclones

Oligopolistic manipulation of spot markets and the timing of futures market speculation

Digitised version produced by the EUI Library and made available online in 2020

The Akzo decision : a case of predatory pricing?

Digitised version produced by the EUI Library and made available online in 2020