35 research outputs found
The formation of a risk management system for projects in the field of aquaculture innovative development in the Kaliningrad region: a case study
This article sets out to develop the concept
and the principal scheme of the formation of a
risk management system for innovative economic
development projects in the field of
aquaculture. The research carried out by the
authors helps identify the main problems and
characteristics of risk management projects
for the development of aquaculture in presentday
Russia. The authors outline the status and
features of aquaculture development projects
in the North-western federal district and the
Kaliningrad region. The article formulates
and justifies the concept of “risk management
projects in innovative development of aquaculture
in the region” focusing on the classification
of aquaculture risks in relation to innovative
development projects, which expands
the conceptual framework of risk management
in view of the specific risks relating to economic
development projects in the field of aquaculture.
The authors characterize modern
methods and approaches to risk management
projects and organizations in the context of
their application in the framework of aquaculture
development projects and offer mechanisms
for risk management of aquaculture development
projects, which make it possible to
include risk management activity in the general
context of activities of parent project organizations.
The authors develop the concept
and principal scheme of the formation of risk
management system for innovative development
projects in aquaculture
Decrease of atmospheric neutron counts observed during thunderstorms.
We report here, in brief, some results of the observation and analysis of sporadic variations of atmospheric thermal neutron flux during thunderstorms. The results obtained with unshielded scintillation neutron detectors show a prominent flux decrease correlated with meteorological precipitations after a long dry period. No observations of neutron production during thunderstorms were reported during the three-year period of data recording
The Dysregulation of Polyamine Metabolism in Colorectal Cancer Is Associated with Overexpression of c-Myc and C/EBP β
Colorectal cancer is one of the most common cancers in the world. It is well known that the chronic inflammation can promote the progression of colorectal cancer (CRC). Recently, a number of studies revealed a potential association between colorectal inflammation, cancer progression, and infection caused by enterotoxigenic Bacteroides fragilis (ETBF). Bacterial enterotoxin activates spermine oxidase (SMO), which produces spermidine and H2O2 as byproducts of polyamine catabolism, which, in turn, enhances inflammation and tissue injury. Using qPCR analysis, we estimated the expression of SMOX gene and ETBF colonization in CRC patients. We found no statistically significant associations between them. Then we selected genes involved in polyamine metabolism, metabolic reprogramming, and inflammation regulation and estimated their expression in CRC. We observed overexpression of SMOX, ODC1, SRM, SMS, MTAP, c-Myc, C/EBPβ (CREBP), and other genes. We found that two mediators of metabolic reprogramming, inflammation, and cell proliferation c-Myc and C/EBPβ may serve as regulators of polyamine metabolism genes (SMOX, AZIN1, MTAP, SRM, ODC1, AMD1, and AGMAT) as they are overexpressed in tumors, have binding site according to ENCODE ChIP-Seq data, and demonstrate strong coexpression with their targets. Thus, increased polyamine metabolism in CRC could be driven by c-Myc and C/EBPβ rather than ETBF infection
Phenological shifts of abiotic events, producers and consumers across a continent
Ongoing climate change can shift organism phenology in ways that vary depending on species, habitats and climate factors studied. To probe for large-scale patterns in associated phenological change, we use 70,709 observations from six decades of systematic monitoring across the former Union of Soviet Socialist Republics. Among 110 phenological events related to plants, birds, insects, amphibians and fungi, we find a mosaic of change, defying simple predictions of earlier springs, later autumns and stronger changes at higher latitudes and elevations. Site mean temperature emerged as a strong predictor of local phenology, but the magnitude and direction of change varied with trophic level and the relative timing of an event. Beyond temperature-associated variation, we uncover high variation among both sites and years, with some sites being characterized by disproportionately long seasons and others by short ones. Our findings emphasize concerns regarding ecosystem integrity and highlight the difficulty of predicting climate change outcomes. The authors use systematic monitoring across the former USSR to investigate phenological changes across taxa. The long-term mean temperature of a site emerged as a strong predictor of phenological change, with further imprints of trophic level, event timing, site, year and biotic interactions.Peer reviewe
Chronicles of nature calendar, a long-term and large-scale multitaxon database on phenology
We present an extensive, large-scale, long-term and multitaxon database on phenological and climatic variation, involving 506,186 observation dates acquired in 471 localities in Russian Federation, Ukraine, Uzbekistan, Belarus and Kyrgyzstan. The data cover the period 1890-2018, with 96% of the data being from 1960 onwards. The database is rich in plants, birds and climatic events, but also includes insects, amphibians, reptiles and fungi. The database includes multiple events per species, such as the onset days of leaf unfolding and leaf fall for plants, and the days for first spring and last autumn occurrences for birds. The data were acquired using standardized methods by permanent staff of national parks and nature reserves (87% of the data) and members of a phenological observation network (13% of the data). The database is valuable for exploring how species respond in their phenology to climate change. Large-scale analyses of spatial variation in phenological response can help to better predict the consequences of species and community responses to climate change.Peer reviewe
Non-radiative transitions between the sublevels of the working lower multiplet of the YAG:Nd laser: Effects on the generation spectrum
The article presents the stationary solution of the Tang–Statz–DeMars system of equations describing the generation spectrum of a YAG:Nd laser at a wavelength of 1064.2 nm taking into account the seven 4F3/2 → 4I11/2 transition gain lines. The effect that line broadening has on the generation spectrum due to a temperature increase has been calculated. The effect of population distribution over the 4I11/2 multiplet sublevels on the generation spectrum was also calculated. The generation spectrum shifting to the region of 1066 nm with a temperature increase was found to result from variations in the population of the 4I11/2 multiplet sublevels
Effect of intense chirped pulses on the coherent phonon generation in Te
The authors have studied the influence of chirped laser pulses on the coherent phonon generation in single crystal Te. They have shown that the pulse chirp affects the amplitude of coherent phonons with A1 symmetry in the case of intense excitation only. By varying the chirp of an intense exciting pulse, the authors demonstrated that negatively chirped pulses are almost twice more effective in the creation of lattice coherence than positively chirped pulses
Effect of phase modulation of a laser pulse on the generation of a coherent totally symmetric phonon in a tellurium single crystal
The effect of phase modulation (resulting in a chirp of an ultrashort laser pulse) on the generation of a coherent A1 phonon in Te was studied. The amplitude of coherent oscillations was found to depend on the sign and value of the pulse chirp: the oscillation amplitude decreases as the chirp increases. For a positive chirp, this effect is twofold stronger than for a negative one. The frequency-resolved response of a bandwidth-limited pulse was studied, which revealed the difference of oscillations and the relaxation response for the Stokes and anti-Stokes frequencies. The detected phenomena can be used for coherent control of lattice dynamics