Search results for "ROV"

Wolbachia prevalence and diversity in selected riverine predatory beetles (Bembidiini and Paederini)

2018

Despite the many studies on Wolbachia in Coleoptera, data about the prevalence of this bacterium among ground and rove beetles are missing. This study describes Wolbachia distribution and diversity in predatory beetles co-habiting the same environment - submontane river channels. Three species of Paederini (Staphylinidae) and four Bembidiini (Carabidae) were collected from six river catchments of the Carpathians. Wolbachia was absent in three species: Paederidus rubrothoracicus (Goeze), Bembidion decorum (Zenker in Panzer), Bembidion modestum (F.) - but detected in four others. Paederus limnophilus Erichson and Paederidus ruficollis F. were infected at only some sites by different strains o…

Therapeutic metaphors and personal meanings in group poetry therapy for people with schizophrenia

2021

This article concerns the therapeutic potential of metaphor in group poetry therapy, concentrating on the poetry therapy process of people diagnosed with schizophrenia. The data was collected in a one-year poetry therapy group. The main questions were: (1) What kind of therapeutic potential can metaphors offer in group poetry therapy? (2) What are the personal meanings and evaluations that the participants give to the therapy process and its effects on their lives? (3) What are the most significant elements in poetry therapy from the viewpoint of the client? The analysis was based on the Grounded theory method. The results showed that the most significant therapeutic factors of the process …

Critical Role of Ligands on the Photoluminescence and Morphology of Colloidal Perovskite Nanocrystals

2019

Improving color correction across camera and illumination changes by contextual sample selection

2012

International audience; In many tasks of machine vision applications, it is important that recorded colors remain constant, in the real world scene, even under changes of the illuminants and the cameras. Contrary to the human vision system, a machine vision system exhibits inadequate adaptability to the variation of lighting conditions. Automatic white bal- ance control available in commercial cameras is not sufficient to pro- vide reproducible color classification. We address this problem of color constancy on a large image database acquired with varying digi- tal cameras and lighting conditions. A device-independent color repre- sentation may be obtained by applying a chromatic adaptation…

Magnetization and magnetoresistive response of LiMn2O4 near the charge ordering transition

2000

We report magnetization and magnetoresistance studies of the geometrically frustrated spinel compound LiMn2O4 near its charge ordering temperature. The effect of a 7 T magnetic field is to very slightly shift the transition in the resistivity to lower temperatures resulting in large negative magnetoresistance with significant hysteresis. This hysteresis is not reflected in the magnetization. These observations are compared with what is found in the colossal magnetoresistance and charge ordering perovskite manganese oxides. The manner in which geometric frustration influences the coupling of charge and spin degrees of freedom is examined.

Thermodynamic stability of non-stoichiometric SrFeO 3−δ : a hybrid DFT study

2019

SrFeO3-δ is mixed ionic-electronic conductor with complex magnetic structure which reveals also colossal magnetoresistance effect. This material and its solid solutions are attractive for various spintronic, catalytic and electrochemical applications, including cathodes for solid oxide fuel cells and permeation membranes. Its properties strongly depend on oxygen non-stoichiometry. Ab initio hybrid functional approach was applied here for a study of thermodynamic stability of a series of SrFeO3-δ compositions with several non-stoichiometries δ, ranging from 0 to 0.5 (SrFeO3 - SrFeO2.875 - SrFeO2.75 - SrFeO2.5) as the function of temperature and oxygen pressure. The results obtained by consid…

Thermodynamics of ABO3-Type Perovskite Surfaces

2011

The ABO3-type perovskite manganites, cobaltates, and ferrates (A= La, Sr, Ca; B=Mn, Co, Fe) are important functional materials which have numerous high-tech applications due to their outstanding magnetic and electrical properties, such as colossal magnetoresistance, half-metallic behavior, and composition-dependent metal-insulator transition (Coey et al., 1999; Haghiri-Gosnet & Renard, 2003). Owing to high electronic and ionic conductivities. these materials show also excellent electrochemical performance, thermal and chemical stability, as well as compatibility with widely used electrolyte based on yttrium-stabilized zirconia (YSZ). Therefore they are among the most promising materials as …

Ruddlesden-Popper Hybrid Lead Bromide Perovskite Nanosheets of Phase Pure n=2: Stabilized Colloids Stored in the Solid State.

2021

Ruddlesden-Popper lead halide perovskite (RP-LHP) nano-nanostructures can be regarded as self-assembled quantum wells or superlattices of 3D perovskites with an intrinsic quantum well thickness of a single or a few (n=2-4) lead halide layers; the quantum wells are separated by organic layers. They can be scaled down to a single quantum well dimension. Here, the preparation of highly (photo)chemical and colloidal stable hybrid LHP nanosheets (NSs) of ca. 7.4 μm lateral size and 2.5 nm quantum well height (thereby presenting a deep blue emission at ca. 440 nm), is reported for the first time. The NSs are close-lying and they even interconnect when deposited on a substrate. Their synthesis is …

Span programs for functions with constant-sized 1-certificates

2012

Besides the Hidden Subgroup Problem, the second large class of quantum speed-ups is for functions with constant-sized 1-certificates. This includes the OR function, solvable by the Grover algorithm, the element distinctness, the triangle and other problems. The usual way to solve them is by quantum walk on the Johnson graph. We propose a solution for the same problems using span programs. The span program is a computational model equivalent to the quantum query algorithm in its strength, and yet very different in its outfit. We prove the power of our approach by designing a quantum algorithm for the triangle problem with query complexity O(n35/27) that is better than O(n13/10) of the best p…

Cupola

2004

La Cupola (o “Commissione”, come è stata indicata dai collaboratori di giustizia) indica la struttura di governo di Cosa Nostra. A partire dal 1987, le indagini sulla configurazione dell’organizzazione mafiosa siciliana riferiscono di un modello a struttura unitaria e verticistica, in grado di esercitare un controllo capillare sul territorio secondo criteri rispondenti al principio di suddivisione in aree geografiche. Al suo interno, le macro-unità sono rappresentate dalle cosiddette province, sulle quali governano i capi-provincia, riuniti in forma collegiale in un organo di coordinamento denominato regione o interprovinciale. Tra gli organi di governo su base provinciale, la più attiva e …