Quantum Channel Capacities with Passive Environment Assistance

We initiate the study of passive environment-assisted communication via a quantum channel, modeled as a unitary interaction between the information carrying system and an environment. In this model, the environment is controlled by a benevolent helper who can set its initial state such as to assist sender and receiver of the communication link. (The case of a malicious environment, also known as jammer, or arbitrarily varying channel, is essentially well-understood and comprehensively reviewed.) Here, after setting out precise definitions, focussing on the problem of quantum communication, we show that entanglement plays a crucial role in this problem: indeed, the assisted capacity where the helper is restricted to product states between channel uses is different from the one with unrestricted helper. Furthermore, prior shared entanglement between the helper and the receiver makes a difference, too.Comment: 14 pages, 13 figures, IEEE format, Theorem 9 (statement and proof) changed, updated References and Example 11 added. Comments are welcome

Classical capacities of quantum channels with environment assistance

A quantum channel physically is a unitary interaction between the information carrying system and an environment, which is initialized in a pure state before the interaction. Conventionally, this state, as also the parameters of the interaction, is assumed to be fixed and known to the sender and receiver. Here, following the model introduced by us earlier [Karumanchi et al., arXiv[quant-ph]:1407.8160], we consider a benevolent third party, i.e. a helper, controlling the environment state, and how the helper's presence changes the communication game. In particular, we define and study the classical capacity of a unitary interaction with helper, indeed two variants, one where the helper can only prepare separable states across many channel uses, and one without this restriction. Furthermore, the two even more powerful scenarios of pre-shared entanglement between helper and receiver, and of classical communication between sender and helper (making them conferencing encoders) are considered.Comment: 28 pages, 9 figures. To appear in "Problems of Information Transmission

A TRUSTED STORAGE SYSTEM FOR THE CLOUD

Data stored in third party storage systems like the cloud might not be secure since confidentiality and integrity of data are not guaranteed. Though cloud computing provides cost-effective storage services, it is a third party service and so, a client cannot trust the cloud service provider to store its data securely within the cloud. Hence, many organizations and users may not be willing to use the cloud services to store their data in the cloud until certain security guarantees are made. In this thesis, a solution to the problem of securely storing the client’s data by maintaining the confidentiality and integrity of the data within the cloud is developed. Five protocols are developed which ensure that the client’s data is stored only on trusted storage servers, replicated only on trusted storage servers, and guarantee that the data owners and other privileged users of that data access the data securely. The system is based on trusted computing platform technology [11]. It uses a Trusted Platform Module, specified by the Trusted Computing Group [11]. An encrypted file system is used to encrypt the user’s data. The system provides data security against a system administrator in the cloud

Ruthenium Complexes as DNA Photonucleases in Treatment of Malignant Skin Carcinoma

A variety of Ruthenium complexes possessing terpyridine complexes as ligands in their coordination sphere have been investigated extensively as DNA photo nucleases in vitro. This work has led to the realization that compounds of Ruthenium bind to DNA purines and that the interactions are of an unprecedented bridging variety. Owing to the molar absorptivity of these complexes in the visible region, direct cleavage of duplex DNA by these complexes requires irradiation in the range of 400-500 nm. Although the observation of DNA photo cleavage in vitro makes these systems good candidates for further investigation, it does not provide any information on whether the compounds would enter cells in vivo, cause cellular damage or death, or be able to penetrate the nucleus to affect DNA photo cleavage. In the present study, we explore the DNA photo cleavage using gel electrophoresis, cytotoxicity, photocytotoxicity and nuclear DNA damage by the Ruthenium compounds, which were recently shown to possess an emissive, pH- dependent ligand centered excited state

Design And Modeling Of Optical Structure Capacity Of Ten Megawatts Power Plants

This manages the parts design and simulates a PV life with MATLAB and Simulink programming. The power plant is made of photovoltaic panels connected in series and parallel, a DC-DC support transformer and a three-phase inverter interferes with a three-phase low voltage array of 0.4 kV and a medium voltage grid of 20 kV by phase methods Up to Transformers. The DCDC support transformer uses an MPPT controller and the inverter uses a d-q concession control strategy with the current PI controller. Some instances are recreated where the dynamic nature of an ordered photoelectric frame is intriguing. They treat solar radiation and temperature changes

Proprioceptive Inference for Dual-Arm Grasping of Bulky Objects Using RoboSimian

This work demonstrates dual-arm lifting of bulky objects based on inferred object properties (center of mass (COM) location, weight, and shape) using proprioception (i.e. force torque measurements). Data-driven Bayesian models describe these quantities, which enables subsequent behaviors to depend on confidence of the learned models. Experiments were conducted using the NASA Jet Propulsion Laboratory's (JPL) RoboSimian to lift a variety of cumbersome objects ranging in mass from 7kg to 25kg. The position of a supporting second manipulator was determined using a particle set and heuristics that were derived from inferred object properties. The supporting manipulator decreased the initial manipulator's load and distributed the wrench load more equitably across each manipulator, for each bulky object. Knowledge of the objects came from pure proprioception (i.e. without reliance on vision or other exteroceptive sensors) throughout the experiments

Formulation Development and Evaluation of Deferasirox Dispersible Tablets

The present study treatment of iron storage disease is to remove from the body the excess iron that has accumulated. This can be done by employing iron Chelators. Iron Chelators can be classified using a number of criteria such as their origin (synthetic versus biologically produced molecules), their interaction with solvents such as water (hydrophobic versus hydrophilic) or their stoichiometric interaction (bidentate versus hexadentate). Some of these properties have an important impact on the clinical utility of the chelator. One of the key clinical features is the degree to which they are absorbed from the gastrointestinal tract. The topic for the present study is “Formulation Development and Evaluation of Deferasirox dispersible tablets”. Introduction is presented in chapter 1 which gives details about chronic iron overload and its mode and choice of drugs for the treatment of chronic iron overload. This chapter also gives the overall view about dispersible tablets and their methods of development. Aim and Objective is presented which gives the information regarding the present study. Literature of review is presented in which provides an extensive detail of the related research work pertaining to the present study. Drug profile is presented which gives details about the mechanism of action, pharmacodynamics, dosage and administration, precautions and side effects of the drug selected. Excipient profile which gives details about the different excipients used in the formulation development. Materials and methods which gives details about the list of chemicals, equipments used for the study. This chapter also gives information about the methods involved in the development of formulation. Experimental investigation which gives information about different formulas developed in the formulation of dispersible tablets and the comparative evaluation of the developed formulation with that of the innovator product. Results and discussion which deals with the completed information regarding physical and chemical analysis of the present study with suitable tables, graphs and figures. Summary and conclusion which provides detailed information about each chapter. Deferasirox is indicated in for the treatment of chronic Iron overload due to blood transfusions in adult and pediatric patients (aged 2 years and over). Pre-formulation studies were performed for the drug and excipients as per the standard procedures. The innovator product characterization was performed. Formulation 1 was made by direct compression method. In this poor flow property was observed and also hardness and friability values were not satisfactory. Formulations 2,3,4,6,7,8,9 were made by using wet granulation method. In formulaton2 hardness was found to be less and the friability value does not comply with the specifications. In formulations 3, 4, 6 in order to get a better dispersion the concentration of superdisintegrant was increased. Here the disintegration time, dispersion time and percentage of drug release does not comply with the innovator product. In formulations 7,8,9 the disintegration time, dispersion time and percentage of drug release were found to match with the innovator product. All the physicochemical characteristics of the finished product were found to be satisfactory. Formulation 5 was also made by wet granulation method with a different formula. Here the disintegration time, dispersion time and percentage drug release does not match with the innovator. All the formulations were subjected to physicochemical analysis and out of them Formulation 8 was found to be satisfactory when compared to other formulations. The disintegration time (35 sec), dispersion time (67 sec) and percentage of drug release (98.3%) were found to be satisfactory and it matches with the innovator. So, the batch size was increased in further trial to check the reproducibility (Formulation 9). Finally loaded for stability as per the ICH guidelines

Effect of Exogenously Applied 24-Epibrassinolide and Brassinazole on Xylogenesis and Microdistribution of Cell Wall Polymers in Leucaena leucocephala (Lam) De Wit

Plant growth regulators play a key role in cell wall structure and chemistry of woody plants. Understanding of these regulatory signals is important in advanced research on wood quality improvement in trees. The present study is aimed to investigate the influence of exogenous application of 24-epibrassinolide (EBR) and brassinosteroid inhibitor, brassinazole (BRZ) on wood formation and spatial distribution of cell wall polymers in the xylem tissue of Leucaena leucocephala using light and immuno electron microscopy methods. Brassinazole caused a decrease in cambial activity, xylem differentiation, length and width of fibres, vessel element width and radial extent of xylem suggesting brassinosteroid inhibition has a concomitant impact on cell elongation, expansion and secondary wall deposition. Histochemical studies of 24-epibrassinolide treated plants showed an increase in syringyl lignin content in the xylem cell walls. Fluorescence microscopy and transmission electron microscopy studies revealed the inhomogenous pattern of lignin distribution in the cell corners and middle lamellae region of BRZ treated plants. Immunolocalization studies using LM10 and LM 11 antibodies have shown a drastic change in the micro-distribution pattern of less substituted and highly substituted xylans in the xylem fibres of plants treated with EBR and BRZ. In conclusion, present study demonstrates an important role of brassinosteroid in plant development through regulating xylogenesis and cell wall chemistry in higher plants