Degeneracies between Modified Gravity and Baryonic Physics

In order to determine the observable signatures of modified gravity theories, it is important to consider the effect of baryonic physics. We use a modified version of the ISIS code to run cosmological hydrodynamic simulations to study degeneracies between modified gravity and radiative hydrodynamical processes. Of these, one was the standard $\Lambda$CDM model and four were variations of the Symmetron model. For each model we ran three variations of baryonic processes: non-radiative hydrodynamics; cooling and star formation; and cooling, star formation, and supernova feedback. We construct stacked gas density, temperature, and dark matter density profiles of the halos in the simulations, and study the differences between them. We find that both radiative variations of the models show degeneracies between their processes and at least two of the three parameters defining the Symmetron model.Comment: 9 pages, 4 figures, matches version accepted to A&

Inorganic carbon time series at Ocean Weather Station M in the Norwegian Sea

International audienceDissolved inorganic carbon (CT) has been collected at Ocean Weather Station M (OWSM) in the Norwegian Sea since 2001. Seasonal variations in CT are confined to the upper 50 m, where the biology is active, and below this layer no clear seasonal signal is seen. From winter to summer the surface CT concentration typical drops from 2140 to about 2040 ?mol kg?1, while a deep water CT concentration of about 2163 ?mol kg?1 is measured throughout the year. Observations show an annual increase in salinity normalized carbon concentration (nCT) of 1.3±0.7 ?mol kg?1 in the surface layer, which is equivalent to a pCO2 increase of 2.6±1.2 ?atm yr?1, i.e. larger than the atmospheric increase in this area. Observations also show an annual increase in the deep water nCT of 0.57± 0.24 ?mol kg?1, of which about a tenth is due to inflow of old Arctic water with larger amounts of remineralised matter. The remaining part has an anthropogenic origin and sources for this might be Greenland Sea surface water, Iceland Sea surface water, and/or recirculated Atlantic Water. By using an extended multi linear regression method (eMLR) it is verified that anthropogenic carbon has entered the whole water column at OWSM

Optimal Control within the Context of Multidisciplinary Design, Analysis, and Optimization

Multidisciplinary design, analysis and optimization involves modeling the interactions of complex systems across a variety of disciplines. The optimization of such systems can be a computationally expensive exercise with multiple levels of nested nonlinear solvers running under an optimizer.The application of optimal control in project development often involves performing trajectory optimization for fixed vehicle designs or parametric sweeps across some key vehicle properties.This information is then relayed to the subsystem design teams who update their designs and relay some bulk characteristics back to the trajectory optimization procedure.This iteration is then repeated until the design closes.However, with increasing interest in more tightly coupled systems, such as electric and hybrid-electric aircraft propulsion and boundary layer ingestion, this process is prone to ignore subtle coupling between vehicle subsystem designs and vehicle operation on a given mission.Integrating trajectory optimization into a tightly coupled multidisciplinary design procedure can be computationally prohibitive, depending on the complexity of the subsystem analyses and the optimal control technique applied.To address these issues a new optimal control software tool, Dymos, has been developed.Dymos is built upon NASA's OpenMDAO software and can leverage its capabilities to efficiently compute gradients for the optimization and optimize complex models in parallel on distributed memory systems.This report provides some explanation into the numerical methods employed in Dymos and provides several use cases that demonstrate its performance on traditional optimal control problems and improvements ino techniques have been used extensively in recent decades to solve a variety of optimal control problems, typically in the form of aerospace vehicle trajectory optimization

Crew Exploration Vehicle Service Module Ascent Abort Coverage

The Crew Exploration Vehicle (CEV) is required to maintain continuous abort capability from lift off through destination arrival. This requirement is driven by the desire to provide the capability to safely return the crew to Earth after failure scenarios during the various phases of the mission. This paper addresses abort trajectory design considerations, concept of operations and guidance algorithm prototypes for the portion of the ascent trajectory following nominal jettison of the Launch Abort System (LAS) until safe orbit insertion. Factors such as abort system performance, crew load limits, natural environments, crew recovery, and vehicle element disposal were investigated to determine how to achieve continuous vehicle abort capability

Nonminimal Supersymmetric Standard Model with Baryon and Lepton Number Violation

We carry out a comprehensive analysis of the nonminimal supersymmetric standard model (NMSSM) with baryon and lepton number violation. We catalogue the baryon and lepton number violating dimension four and five operators of the model. We then study the renormalization group evolution and infrared stable fixed points of the Yukawa couplings and the soft supersymmetry breaking trilinear couplings of this model with baryon and lepton number (and R-parity) violation involving the heaviest generations. We show analytically that in the Yukawa sector of the NMSSM there is only one infrared stable fixed point. This corresponds to a non-trivial fixed point for the top-, bottom-quark Yukawa couplings and the $B$ violating coupling $\lambda_{233}''$, and a trivial one for all other couplings. All other possible fixed points are either unphysical or unstable in the infrared region. We also carry out an analysis of the renormalization group equations for the soft supersymmetry breaking trilinear couplings, and determine the corresponding fixed points for these couplings. We then study the quasi-fixed point behaviour, both of the third generation Yukawa couplings and the baryon number violating coupling, and those of the soft supersymmetry breaking trilinear couplings. From the analysis of the fixed point behaviour, we obtain upper and lower bounds on the baryon number violating coupling $\lambda_{233}''$, as well as on the soft supersymmetry breaking trilinear couplings. Our analysis shows that the infrared fixed point behavior of NMSSM with baryon and lepton number violation is similar to that of MSSM.Comment: 35 pages, Revtex, 6 eps fig

ANALISIS KEUNTUNGAN USAHA TANI BUDIDAYA IKAN NILA GIFT DI DESA LEMBONG URAM KECAMATAN LEBONG UTARA KABUPATEN LEBONG

Fishery cultIvation is one sub-sector which is really potential to be developed because it is to be renewed. Lebong Regency also have the potential to develop the fisheries sector especially in embong uram village north lebong sub- distrct lebong regency. The Fishery cultivation that developed in this place is nila gift fish. the purpose of the research is to know how io count the profits of cultivation of nila gift fish in embong uram village north lebong sub-district lebong regency with number of respondents are 20 persons. The results obtained by the nila gift fish stable price is in range of Rp.2O.OO0 with the production of nila gift fish 40 kg while the lowest to the highest level of production is 300 kg. For total fixed cost (TFC) in the range of Rp. 460.000 for the lowest and the highest total fixed cost Rp. 5.800.000. while tn Total variable cost (TVC) that incurred by farmers in average Rp 200.000. The, crop cultivation of nila gift fish in embong uram village north lebong sub-district lebong regency most benefit by the range is the lowest profit obtained Rp. 140.000 and tte nighest Rp. 2.425.000 but there is also the farmer who suffer losses of that is as much as 1 people with losses of Rp. 3.600.000 and a farmer has break even point which revenue as same as total cost. Key Words: price, production, cost and profi

Hydrodynamic interaction in quasi-two-dimensional suspensions

Confinement between two parallel surfaces is found, theoretically and experimentally, to drastically affect the hydrodynamic interaction between colloid particles, changing the sign of the coupling, its decay with distance and its concentration dependence. In particular, we show that three-body effects do not modify the coupling at large distances as would be expected from hydrodynamic screening.Comment: 8 pages, 2 figure

Correlated particle dynamics in concentrated quasi-two-dimensional suspensions

We investigate theoretically and experimentally how the hydrodynamically correlated lateral motion of particles in a suspension confined between two surfaces is affected by the suspension concentration. Despite the long range of the correlations (decaying as 1/r^2 with the inter-particle distance r), the concentration effect is present only at short inter-particle distances for which the static pair correlation is nonuniform. This is in sharp contrast with the effect of hydrodynamic screening present in unconfined suspensions, where increasing the concentration changes the prefactor of the large-distance correlation.Comment: 13 page

The Child, the Emperor, and the Fabulous Clothes: Constructing a theory of how interpersonal difficulty in gifted adults arises, is perpetuated, and can be overcome

In the literature and research on giftedness there are ubiquitous references to interpersonal problems. This project investigated this by comprehensively bringing such references together and analysing them (textual analysis), and by interviewing 20 gifted adults about their interpersonal experiences. A Constructivist Grounded Theory methodology was employed to build a theory grounded in research data that could explain how interpersonal difficulty in gifted individuals arises, is perpetuated, and can be overcome. A Psychosocial (Hollway 2016) interpretation of the data examined not just its explicit cognitive and behavioural content but also the more hidden nuances of intersubjective experience – termed ‘unconscious processes’ – that the giftedness literature neglects. An ‘Overview Model of Giftedness’ was constructed to organize the research findings, which emphasizes the importance of person-environment interaction, belonging, competition, and collaboration. Interpersonal difficulty was found to arise predominantly through relating categorized as naïve (‘Child’, including autism) or arrogant (‘Emperor’, including narcissism). It was demonstrated how interpersonal difficulty is perpetuated through unconscious processes such as transferences, valencies, and intersubjective complementarities. It was found that interpersonal difficulty was overcome by changing environments (gaining contact with more similar others); changing the level of self-expressiveness (‘hiding self’); or changing the nature of self-expressiveness (such as tempering naivety and arrogance through improving interpersonal understanding and skill). These findings were consolidated in an original model titled ‘Giftedness and Interpersonal Relating’ that shows the optimal movement away from being interpersonally inhibited, despairing, or provoking, towards thriving. Conclusion: Atypically efficient neural functioning, and minority status, make gifted individuals vulnerable to interpersonal difficulty. Recognising the individual differences involved, their impact, and their unconsciously perpetuating intersubjective patterns, and taking this into account when communicating with others, improves interpersonal relating and the actualizing of gifted potential. The project’s main products are a website offering services designed to “help high-ability adults thrive”, and a book proposal