WorldWideScience

Sample records for homomorphism correctness conditions

  1. Approximately Ternary Homomorphisms on C*-Ternary Algebras

    Directory of Open Access Journals (Sweden)

    Eon Wha Shim

    2013-01-01

    functional equation: fx2-x1/3+fx1-3x3/3+f3x1+3x3-x2/3=fx1, by the direct method. Under the conditions in the main theorems, we can show that the related mappings must be zero. In this paper, we correct the conditions and prove the corrected theorems. Furthermore, we prove the Hyers-Ulam stability and the superstability of C*-ternary homomorphisms and C*-ternary derivations on C*-ternary algebras by using a fixed point approach.

  2. Homomorphic encryption and applications

    CERN Document Server

    Yi, Xun; Bertino, Elisa

    2014-01-01

    This book introduces the fundamental concepts of homomorphic encryption. From these foundations, applications are developed in the fields of private information retrieval, private searching on streaming data, privacy-preserving data mining, electronic voting and cloud computing. The content is presented in an instructional and practical style, with concrete examples to enhance the reader's understanding. This volume achieves a balance between the theoretical and the practical components of modern information security. Readers will learn key principles of homomorphic encryption as well as their

  3. Continuous-variable quantum homomorphic signature

    Science.gov (United States)

    Li, Ke; Shang, Tao; Liu, Jian-wei

    2017-10-01

    Quantum cryptography is believed to be unconditionally secure because its security is ensured by physical laws rather than computational complexity. According to spectrum characteristic, quantum information can be classified into two categories, namely discrete variables and continuous variables. Continuous-variable quantum protocols have gained much attention for their ability to transmit more information with lower cost. To verify the identities of different data sources in a quantum network, we propose a continuous-variable quantum homomorphic signature scheme. It is based on continuous-variable entanglement swapping and provides additive and subtractive homomorphism. Security analysis shows the proposed scheme is secure against replay, forgery and repudiation. Even under nonideal conditions, it supports effective verification within a certain verification threshold.

  4. Implementation of Spatial Domain Homomorphic Filtering on ...

    African Journals Online (AJOL)

    This paper describes the analysis of the Homomorphic filtering algorithm, the equivalency between the frequency and spatial-domain methods and the implementation of low-pass and high-pass spatial domain Homomorphic filter in low power embedded devices. It is shown that the Homomorphic filter in the spatial domain ...

  5. Homomorphisms between C∗ -algebra extensions

    Indian Academy of Sciences (India)

    -algebra extensions. CHANGGUO WEI. School of Mathematical Sciences, Ocean University of China, Qingdao 266071, ... into the other in general, so we have to consider properties of extension homomorphisms before studying the ..... Theory (Dalhousie Univ., Halifax, N.S., 1973) Lecture Notes in Math. (Berlin: Springer).

  6. Homomorphic processing of seismic signals

    Energy Technology Data Exchange (ETDEWEB)

    Brolley, J.E.

    1979-06-01

    An introduction to homomorphic processing of time series is presented. The basic concept is discussed and one form of implementation is adduced. Simple examples of reverberation problems are illustrated. Simple applications to real-time series associated with underground nuclear explosions and earthquakes are then presented. 19 figures.

  7. implementation of spatial domain homomorphic filtering

    African Journals Online (AJOL)

    eobe

    Keywords: Spatial domain homomorphic filtering, contrast enhancement, image processing, java programming. 1. INTRODUCTION. There is a lot of background literature on frequency- domain Homomorphic filtering [1-2]. However, such a scheme is too costly and complex to implement in digital and embedded hardware ...

  8. A note on the homomorphism theorem for hemirings

    Directory of Open Access Journals (Sweden)

    D. M. Olson

    1978-01-01

    Full Text Available The fundamental homomorphism theorem for rings is not generally applicable in hemiring theory. In this paper, we show that for the class of N-homomorphism of hemirings the fundamental theorem is valid. In addition, the concept of N-homomorphism is used to prove that every hereditarily semisubtractive hemiring is of type (K.

  9. Quantum Fully Homomorphic Encryption with Verification

    DEFF Research Database (Denmark)

    Alagic, Gorjan; Dulek, Yfke; Schaffner, Christian

    2017-01-01

    Fully-homomorphic encryption (FHE) enables computation on encrypted data while maintaining secrecy. Recent research has shown that such schemes exist even for quantum computation. Given the numerous applications of classical FHE (zero-knowledge proofs, secure two-party computation, obfuscation, e...

  10. implementation of spatial domain homomorphic filtering

    African Journals Online (AJOL)

    eobe

    There is a lot of background literature on frequency- domain Homomorphic ... developed in the literature [4-6, 8-9]. This paper ..... Processing times for spatial and frequency domain filter. Colour Image Dimensions Spatial domain processing time(s) Frequency domainprocessing time(s). Girl. 256 × 256. 0.058. 0.914. Swan.

  11. Some results about Linear Recurrence Relation Homomorphisms

    OpenAIRE

    Laugier, Alexandre; Saikia, Manjil P.

    2013-01-01

    In this paper we propose a definition of a recurrence relation homomorphism and illustrate our definition with a few examples. We then define the period of a k-th order of linear recurrence relation and deduce certain preliminary results associated with them.

  12. Homomorphisms of complete distributive lattices | Pultr ...

    African Journals Online (AJOL)

    A survey of analogous results on algebraic universality of categories based on finitary distributive (0, 1)-lattices is included to motivate further questions about categories based on complete distributive lattices. Keywords: complete distributive lattice, complete lattice homomorphism, frame, Heyting algebra, continuous map, ...

  13. Automatic continuity for homomorphisms into free products

    DEFF Research Database (Denmark)

    Slutsky, Konstantin

    2013-01-01

    A homomorphism from a completely metrizable topological group into a free product of groups whose image is not contained in a factor of the free product is shown to be continuous with respect to the discrete topology on the range. In particular, any completely metrizable group topology on a free ...

  14. An Efficient Secret Key Homomorphic Encryption Used in Image Processing Service

    Directory of Open Access Journals (Sweden)

    Pan Yang

    2017-01-01

    Full Text Available Homomorphic encryption can protect user’s privacy when operating on user’s data in cloud computing. But it is not practical for wide using as the data and services types in cloud computing are diverse. Among these data types, digital image is an important personal data for users. There are also many image processing services in cloud computing. To protect user’s privacy in these services, this paper proposed a scheme using homomorphic encryption in image processing. Firstly, a secret key homomorphic encryption (IGHE was constructed for encrypting image. IGHE can operate on encrypted floating numbers efficiently to adapt to the image processing service. Then, by translating the traditional image processing methods into the operations on encrypted pixels, the encrypted image can be processed homomorphically. That is, service can process the encrypted image directly, and the result after decryption is the same as processing the plain image. To illustrate our scheme, three common image processing instances were given in this paper. The experiments show that our scheme is secure, correct, and efficient enough to be used in practical image processing applications.

  15. Semi-Homomorphic Encryption and Multiparty Computation

    DEFF Research Database (Denmark)

    Bendlin, Rikke; Damgård, Ivan Bjerre; Orlandi, Claudio

    2011-01-01

    An additively-homomorphic encryption scheme enables us to compute linear functions of an encrypted input by manipulating only the ciphertexts. We define the relaxed notion of a semi-homomorphic encryption scheme, where the plaintext can be recovered as long as the computed function does...... allow us to construct an efficient multiparty computation protocol for arithmetic circuits, UC-secure against a dishonest majority. The protocol consists of a preprocessing phase and an online phase. Neither the inputs nor the function to be computed have to be known during preprocessing. Moreover......, the online phase is extremely efficient as it requires no cryptographic operations: the parties only need to exchange additive shares and verify information theoretic MACs. Our contribution is therefore twofold: from a theoretical point of view, we can base multiparty computation on a variety of different...

  16. State Of Art in Homomorphic Encryption Schemes

    Directory of Open Access Journals (Sweden)

    S. Sobitha Ahila

    2014-02-01

    Full Text Available The demand for privacy of digital data and of algorithms for handling more complex structures have increased exponentially over the last decade. However, the critical problem arises when there is a requirement for publicly computing with private data or to modify functions or algorithms in such a way that they are still executable while their privacy is ensured. This is where homomorphic cryptosystems can be used since these systems enable computations with encrypted data. A fully homomorphic encryption scheme enables computation of arbitrary functions on encrypted data.. This enables a customer to generate a program that can be executed by a third party, without revealing the underlying algorithm or the processed data. We will take the reader through a journey of these developments and provide a glimpse of the exciting research directions that lie ahead. In this paper, we propose a selection of the most important available solutions, discussing their properties and limitations.

  17. Homomorphisms of certain Banach function algebras

    Indian Academy of Sciences (India)

    R. Narasimhan (Krishtel eMaging) 1461 1996 Oct 15 13:05:22

    Let (X, d) be a compact metric space. Then every homomorphism from. Lipα(X, d) into uniform algebra A is compact. Proof. As we know, Lipα(X, d) is natural Banach function algebra. So by Theorem 1, it is sufficient to show that every bounded sequence in Lipα(X, d) has a subsequence which is convergent in C(X). For this ...

  18. Group homomorphic encryption: characterizations, impossibility results, and applications

    NARCIS (Netherlands)

    Armknecht, F.; Katzenbeisser, S.; Peter, Andreas

    We give a complete characterization both in terms of security and design of all currently existing group homomorphic encryption schemes, i.e., existing encryption schemes with a group homomorphic decryption function such as ElGamal and Paillier. To this end, we formalize and identify the basic

  19. Private genome analysis through homomorphic encryption.

    Science.gov (United States)

    Kim, Miran; Lauter, Kristin

    2015-01-01

    The rapid development of genome sequencing technology allows researchers to access large genome datasets. However, outsourcing the data processing o the cloud poses high risks for personal privacy. The aim of this paper is to give a practical solution for this problem using homomorphic encryption. In our approach, all the computations can be performed in an untrusted cloud without requiring the decryption key or any interaction with the data owner, which preserves the privacy of genome data. We present evaluation algorithms for secure computation of the minor allele frequencies and χ2 statistic in a genome-wide association studies setting. We also describe how to privately compute the Hamming distance and approximate Edit distance between encrypted DNA sequences. Finally, we compare performance details of using two practical homomorphic encryption schemes--the BGV scheme by Gentry, Halevi and Smart and the YASHE scheme by Bos, Lauter, Loftus and Naehrig. The approach with the YASHE scheme analyzes data from 400 people within about 2 seconds and picks a variant associated with disease from 311 spots. For another task, using the BGV scheme, it took about 65 seconds to securely compute the approximate Edit distance for DNA sequences of size 5K and figure out the differences between them. The performance numbers for BGV are better than YASHE when homomorphically evaluating deep circuits (like the Hamming distance algorithm or approximate Edit distance algorithm). On the other hand, it is more efficient to use the YASHE scheme for a low-degree computation, such as minor allele frequencies or χ2 test statistic in a case-control study.

  20. Logarithmic corrections to gravitational entropy and the null energy condition

    Energy Technology Data Exchange (ETDEWEB)

    Parikh, Maulik, E-mail: maulik.parikh@asu.edu; Svesko, Andrew

    2016-10-10

    Using a relation between the thermodynamics of local horizons and the null energy condition, we consider the effects of quantum corrections to the gravitational entropy. In particular, we find that the geometric form of the null energy condition is not affected by the inclusion of logarithmic corrections to the Bekenstein–Hawking entropy.

  1. Logarithmic corrections to gravitational entropy and the null energy condition

    Directory of Open Access Journals (Sweden)

    Maulik Parikh

    2016-10-01

    Full Text Available Using a relation between the thermodynamics of local horizons and the null energy condition, we consider the effects of quantum corrections to the gravitational entropy. In particular, we find that the geometric form of the null energy condition is not affected by the inclusion of logarithmic corrections to the Bekenstein–Hawking entropy.

  2. Backscatter Correction Algorithm for TBI Treatment Conditions

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez-Nieto, B.; Sanchez-Doblado, F.; Arrans, R.; Terron, J.A. [Dpto. Fisiología Médica y Biofísica, Universidad de Sevilla, Avda. Sánchez Pizjuán, 4. E-41009, Sevilla (Spain); Errazquin, L. [Servicio Oncología Radioterápica, Hospital Univ.V. Macarena. Dr. Fedriani, s/n. E-41009, Sevilla (Spain)

    2015-01-15

    The accuracy requirements in target dose delivery is, according to ICRU, ±5%. This is so not only in standard radiotherapy but also in total body irradiation (TBI). Physical dosimetry plays an important role in achieving this recommended level. The semi-infinite phantoms, customarily used for dosimetry purposes, give scatter conditions different to those of the finite thickness of the patient. So dose calculated in patient’s points close to beam exit surface may be overestimated. It is then necessary to quantify the backscatter factor in order to decrease the uncertainty in this dose calculation. The backward scatter has been well studied at standard distances. The present work intends to evaluate the backscatter phenomenon under our particular TBI treatment conditions. As a consequence of this study, a semi-empirical expression has been derived to calculate (within 0.3% uncertainty) the backscatter factor. This factor depends lineally on the depth and exponentially on the underlying tissue. Differences found in the qualitative behavior with respect to standard distances are due to scatter in the bunker wall close to the measurement point.

  3. Canonical extensions of the Johnson homomorphisms to the Torelli groupoid

    DEFF Research Database (Denmark)

    Bene, Alex; Kawazumi, Nariya; Penner, Robert

    2009-01-01

    We prove that every trivalent marked bordered fatgraph comes equipped with a canonical generalized Magnus expansion in the sense of Kawazumi. This Magnus expansion is used to give canonical extensions of the higher Johnson homomorphisms τm , for m 1 , to the Torelli groupoid, and we provide...... a recursive combinatorial formula for tensor representatives of these extensions. In particular, we give an explicit 1-cocycle in the dual fatgraph complex which extends τ2 and thus answer affirmatively a question of Morita and Penner. To illustrate our techniques for calculating higher Johnson homomorphisms...

  4. A privacy-preserving parallel and homomorphic encryption scheme

    Science.gov (United States)

    Min, Zhaoe; Yang, Geng; Shi, Jingqi

    2017-04-01

    In order to protect data privacy whilst allowing efficient access to data in multi-nodes cloud environments, a parallel homomorphic encryption (PHE) scheme is proposed based on the additive homomorphism of the Paillier encryption algorithm. In this paper we propose a PHE algorithm, in which plaintext is divided into several blocks and blocks are encrypted with a parallel mode. Experiment results demonstrate that the encryption algorithm can reach a speed-up ratio at about 7.1 in the MapReduce environment with 16 cores and 4 nodes.

  5. A privacy-preserving parallel and homomorphic encryption scheme

    Directory of Open Access Journals (Sweden)

    Min Zhaoe

    2017-04-01

    Full Text Available In order to protect data privacy whilst allowing efficient access to data in multi-nodes cloud environments, a parallel homomorphic encryption (PHE scheme is proposed based on the additive homomorphism of the Paillier encryption algorithm. In this paper we propose a PHE algorithm, in which plaintext is divided into several blocks and blocks are encrypted with a parallel mode. Experiment results demonstrate that the encryption algorithm can reach a speed-up ratio at about 7.1 in the MapReduce environment with 16 cores and 4 nodes.

  6. Homomorphism and quotient of fuzzy k-hyperideals

    Directory of Open Access Journals (Sweden)

    R. Ameri

    2010-12-01

    Full Text Available In [15], we introduced the notion of weak (resp. strong fuzzy k- hyperideal. In this note we investigate the behavior of them under homomorphisms of semihyperrings. Also we define the quotient of fuzzy weak (resp. strong k-hyperideals by a regular relation of semihyperring and obtain some results.

  7. General Impossibility of Group Homomorphic Encryption in the Quantum World

    NARCIS (Netherlands)

    Armknecht, Frederik; Gagliardoni, Tommaso; Katzenbeisser, Stefan; Peter, Andreas

    2014-01-01

    Group homomorphic encryption represents one of the most important building blocks in modern cryptography. It forms the basis of widely-used, more sophisticated primitives, such as CCA2-secure encryption or secure multiparty computation. Unfortunately, recent advances in quantum computation show that

  8. Quantum homomorphic encryption for polynomial-sized circuits

    NARCIS (Netherlands)

    Y. Dulek (Yfke); C. Schaffner (Christian); F. Speelman (Florian)

    2016-01-01

    textabstractWe present a new scheme for quantum homomorphic encryption which is compact and allows for efficient evaluation of arbitrary polynomial-sized quantum circuits. Building on the framework of Broadbent and Jeffery [BJ15] and recent results in the area of instantaneous non-local quantum

  9. a fuzzy homomorphic algori omomorphic algorithm for image

    African Journals Online (AJOL)

    eobe

    restoration and contrast enhancement [7. However, there is no specific application to dat fuzzy methods for image enhancement techniq such as Homomorphic filtering. However, some w in the literature has incorporated a Fuzzy rule approach to the problem of dynamic ra compression and contrast enhancement [5]. A no.

  10. A Fuzzy Homomorphic Algorithm for Image Enhancement | Nnolim ...

    African Journals Online (AJOL)

    The implementation and analysis of a novel Fuzzy Homomorphic image enhancement technique is presented. The technique combines the logarithmic transform with fuzzy membership functions to deliver an intuitive method of image enhancement. This algorithm reduces the computational complexity by eliminating the ...

  11. Pathophysiological Mechanisms of Laser Correction in Critical Conditions

    Directory of Open Access Journals (Sweden)

    V. L. Kozhura

    2006-01-01

    Full Text Available The paper provides the generalized results of studies dealing with the use of low-intensive laser irradiation in blood loss-induced critical conditions in an experiment and in patients with severe mechanical injury. In the light of recent data and the data available in the literature, the authors consider some pathophysiological mechanisms of action of laser radiation at all living matter organization levels: molecular, cellular, organ, and systemic. The feasibilities of laser correction of hemostastic disorders are defined in relation to the volume of blood loss and the functional state of compensatory systems. 

  12. Homomorphic encryption experiments on IBM's cloud quantum computing platform

    Science.gov (United States)

    Huang, He-Liang; Zhao, You-Wei; Li, Tan; Li, Feng-Guang; Du, Yu-Tao; Fu, Xiang-Qun; Zhang, Shuo; Wang, Xiang; Bao, Wan-Su

    2017-02-01

    Quantum computing has undergone rapid development in recent years. Owing to limitations on scalability, personal quantum computers still seem slightly unrealistic in the near future. The first practical quantum computer for ordinary users is likely to be on the cloud. However, the adoption of cloud computing is possible only if security is ensured. Homomorphic encryption is a cryptographic protocol that allows computation to be performed on encrypted data without decrypting them, so it is well suited to cloud computing. Here, we first applied homomorphic encryption on IBM's cloud quantum computer platform. In our experiments, we successfully implemented a quantum algorithm for linear equations while protecting our privacy. This demonstration opens a feasible path to the next stage of development of cloud quantum information technology.

  13. Stability of the equation of homomorphism and completeness of the underlying space

    Directory of Open Access Journals (Sweden)

    Zenon Moszner

    2008-01-01

    Full Text Available We prove that all assumptions of a Theorem of Forti and Schwaiger (cf. [G. L. Forti, J. Schwaiger, Stability of homomorphisms and completeness, C. R. Math. Rep. Acad. Sci. Canada 11 (1989, 215–220] on the coherence of stability of the equation of homomorphism with the completeness of the space of values of all these homomorphisms, are essential. We give some generalizations of this theorem and certain examples of applications.

  14. A Luggage Control System Based on NFC and Homomorphic Cryptography

    OpenAIRE

    Néstor Álvarez-Díaz; Pino Caballero-Gil; Mike Burmester

    2017-01-01

    We propose an innovative luggage tracking and management system that can be used to secure airport terminal services and reduce the waiting time of passengers during check-in. This addresses an urgent need to streamline and optimize passenger flows at airport terminals and lowers the risk of terrorist threats. The system employs Near Field Communication (NFC) technology and homomorphic cryptography (the Paillier cryptosystem) to protect wireless communication and stored data. A security analy...

  15. On Weil homomorphism in locally free sheaves over structured spaces

    Directory of Open Access Journals (Sweden)

    Falkiewicz Ewa

    2017-04-01

    Full Text Available Inspired by the work of Heller and Sasin [1], we construct in this paper Weil homomorphism in a locally free sheaf W of ϕ-fields [2] over a structured space. We introduce the notion of G-consistent, linear connection on this sheaf, what allows us to clearly define Chern, Pontrjagin and Euler characteristic classes. We also show proper equalities between those classes.

  16. An Efficient Quantum Somewhat Homomorphic Symmetric Searchable Encryption

    Science.gov (United States)

    Sun, Xiaoqiang; Wang, Ting; Sun, Zhiwei; Wang, Ping; Yu, Jianping; Xie, Weixin

    2017-04-01

    In 2009, Gentry first introduced an ideal lattices fully homomorphic encryption (FHE) scheme. Later, based on the approximate greatest common divisor problem, learning with errors problem or learning with errors over rings problem, FHE has developed rapidly, along with the low efficiency and computational security. Combined with quantum mechanics, Liang proposed a symmetric quantum somewhat homomorphic encryption (QSHE) scheme based on quantum one-time pad, which is unconditional security. And it was converted to a quantum fully homomorphic encryption scheme, whose evaluation algorithm is based on the secret key. Compared with Liang's QSHE scheme, we propose a more efficient QSHE scheme for classical input states with perfect security, which is used to encrypt the classical message, and the secret key is not required in the evaluation algorithm. Furthermore, an efficient symmetric searchable encryption (SSE) scheme is constructed based on our QSHE scheme. SSE is important in the cloud storage, which allows users to offload search queries to the untrusted cloud. Then the cloud is responsible for returning encrypted files that match search queries (also encrypted), which protects users' privacy.

  17. Torelli groups, extended Johnson homomorphisms, and new cycles on the moduli space of curves

    DEFF Research Database (Denmark)

    Morita, Shigeyuki; Penner, Robert

    modulo N are derived for all N. Furthermore, the first Johnson homomorphism, which is defined from the classical Torelli group to the third exterior power of the homology of the surface, is shown to lift to an explicit canonical 1-cocycle of the Teichmueller space. The main tool for these results...... cocycle lifts of the higher Johnson homomorphisms....

  18. Nonterminals, homomorphisms and codings in different variations of OL-systems. II. Nondeterministic systems

    DEFF Research Database (Denmark)

    Nielsen, Mogens; Rozenberg, Grzegorz; Salomaa, Arto

    1974-01-01

    Continuing the work begun in Part I of this paper, we consider now variations of nondeterministic OL-systems. The present Part II of the paper contains a systematic classification of the effect of nonterminals, codings, weak codings, nonerasing homomorphisms and homomorphisms for all basic variat...

  19. Stability and Superstability of Ring Homomorphisms on Non-Archimedean Banach Algebras

    Directory of Open Access Journals (Sweden)

    M. Eshaghi Gordji

    2011-01-01

    Full Text Available Using fixed point methods, we prove the superstability and generalized Hyers-Ulam stability of ring homomorphisms on non-Archimedean Banach algebras. Moreover, we investigate the superstability of ring homomorphisms in non-Archimedean Banach algebras associated with the Jensen functional equation.

  20. Nearly Ring Homomorphisms and Nearly Ring Derivations on Non-Archimedean Banach Algebras

    Directory of Open Access Journals (Sweden)

    Madjid Eshaghi Gordji

    2010-01-01

    Full Text Available We prove the generalized Hyers-Ulam stability of homomorphisms and derivations on non-Archimedean Banach algebras. Moreover, we prove the superstability of homomorphisms on unital non-Archimedean Banach algebras and we investigate the superstability of derivations in non-Archimedean Banach algebras with bounded approximate identity.

  1. Lattice and algebra homomorphisms on C (X) in Zermelo-Fraenkel ...

    African Journals Online (AJOL)

    Let C (X) denote the lattice-ordered algebra of all real-valued continuous functions on a topological space X. This paper discusses in Zermelo-Fraenkel Set Theory the equivalence on C (X) between algebra homomorphisms, lattice homo- morphisms, and point evaluations. Keywords: Algebra homomorphism, lattice ...

  2. A Luggage Control System Based on NFC and Homomorphic Cryptography

    Directory of Open Access Journals (Sweden)

    Néstor Álvarez-Díaz

    2017-01-01

    Full Text Available We propose an innovative luggage tracking and management system that can be used to secure airport terminal services and reduce the waiting time of passengers during check-in. This addresses an urgent need to streamline and optimize passenger flows at airport terminals and lowers the risk of terrorist threats. The system employs Near Field Communication (NFC technology and homomorphic cryptography (the Paillier cryptosystem to protect wireless communication and stored data. A security analysis and a performance test show the usability and applicability of the proposed system.

  3. Watermarking scheme based on singular value decomposition and homomorphic transform

    Science.gov (United States)

    Verma, Deval; Aggarwal, A. K.; Agarwal, Himanshu

    2017-10-01

    A semi-blind watermarking scheme based on singular-value-decomposition (SVD) and homomorphic transform is pro-posed. This scheme ensures the digital security of an eight bit gray scale image by inserting an invisible eight bit gray scale wa-termark into it. The key approach of the scheme is to apply the homomorphic transform on the host image to obtain its reflectance component. The watermark is embedded into the singular values that are obtained by applying the singular value decomposition on the reflectance component. Peak-signal-to-noise-ratio (PSNR), normalized-correlation-coefficient (NCC) and mean-structural-similarity-index-measure (MSSIM) are used to evaluate the performance of the scheme. Invisibility of watermark is ensured by visual inspection and high value of PSNR of watermarked images. Presence of watermark is ensured by visual inspection and high values of NCC and MSSIM of extracted watermarks. Robustness of the scheme is verified by high values of NCC and MSSIM for attacked watermarked images.

  4. Mammographic image enhancement using wavelet transform and homomorphic filter

    Directory of Open Access Journals (Sweden)

    F Majidi

    2015-12-01

    Full Text Available Mammography is the most effective method for the early diagnosis of breast cancer diseases. As mammographic images contain low signal to noise ratio and low contrast, it becomes too difficult for radiologists to analyze mammogram. To deal with the above stated problems, it is very important to enhance the mammographic images using image processing methods. This paper introduces a new image enhancement approach for mammographic images which uses the modified mathematical morphology, wavelet transform and homomorphic filter to suppress the noise of images. For performance evaluation of the proposed method, contrast improvement index (CII and edge preservation index (EPI are adopted. Experimental results on mammographic images from Pejvak Digital Imaging Center (PDIC show that the proposed algorithm improves the two indexes, thereby achieving the goal of enhancing mammographic images.

  5. Content-based image retrieval in homomorphic encryption domain.

    Science.gov (United States)

    Bellafqira, Reda; Coatrieux, Gouenou; Bouslimi, Dalel; Quellec, Gwenole

    2015-08-01

    In this paper, we propose a secure implementation of a content-based image retrieval (CBIR) method that makes possible diagnosis aid systems to work in externalized environment and with outsourced data as in cloud computing. This one works with homomorphic encrypted images from which it extracts wavelet based image features next used for subsequent image comparison. By doing so, our system allows a physician to retrieve the most similar images to a query image in an outsourced database while preserving data confidentiality. Our Secure CBIR is the first one that proposes to work with global image features extracted from encrypted images and does not induce extra communications in-between the client and the server. Experimental results show it achieves retrieval performance as good as if images were processed non-encrypted.

  6. Pedagogical Conditions of Interethnic Relations Correction in Educational Environment

    Science.gov (United States)

    Shibankova, Lyutsia A.; Dolganovskaya, Natalia V.; Ishmuradova, Alfiya M.; Matveeva, Elena S.; Vlasova, Tatiana; Chistyakov, Alexey A.

    2016-01-01

    The research urgency is conditioned by the strengthening of the role of educational institutions in the process of interaction between representatives of different cultures and religions, by the creation of favorable socio-psychological climate. Within the study of the educational environment, the authors identify its properties, conditioning the…

  7. Parallelizing fully homomorphic encryption for a cloud environment

    Directory of Open Access Journals (Sweden)

    Ryan Hayward

    2015-04-01

    Full Text Available Cloud computing is a boon for both business and private use, but data security concerns slow its adoption. Fully homomorphic encryption (FHE offers the means by which the cloud computing can be performed on encrypted data, obviating the data security concerns. FHE is not without its cost, as FHE operations take orders of magnitude more processing time and memory than the same operations on unencrypted data. Cloud computing can be leveraged to reduce the time taken by bringing to bear parallel processing. This paper presents an implementation of a processing dispatcher which takes an iterative set of operations on FHE encrypted data and splits them between a number of processing engines. A private cloud was implemented to support the processing engines. The processing time was measured with 1, 2, 4, and 8 processing engines. The time taken to perform the calculations with the four levels of parallelization, as well as the amount of time used in data transfers are presented. In addition, the time the computation servers spent in each of addition, subtraction, multiplication, and division are laid out. An analysis of the time gained by parallel processing is presented. The experimental results shows that the proposed parallel processing of Gentry's encryption improves the performance better than the computations on a single node. This research provides the following contributions. A private cloud was built to support parallel processing of homomorphic encryption in the cloud. A client-server model was created to evaluate cloud computing of the Gentry's encryption algorithm. A distributed algorithm was developed to support parallel processing of the Gentry's algorithm for evaluation on the cloud. An experiment was setup for the evaluation of the Gentry's algorithm, and the results of the evaluation show that the distributed algorithm can be used to speed up the processing of the Gentry's algorithm with cloud computing.

  8. CORRECTION OF VITAMIN-DEFICIENT CONDITIONS IN CHILDREN WITH ATOPY

    Directory of Open Access Journals (Sweden)

    E.A. Vishneva

    2011-01-01

    Full Text Available The most important biochemical processes in human organism are carried out with vitamins and microelements involved. Acting as biological catalysts, vitamins have an impact on metabolism and provide protection against unfavourable environmental factors. The key source of vitamins and microelements for a person is food. The content of vitamins in a diet varies and depends on a range of various reasons. However, now the diet may not fully meet vitamin and microelement requirements. The result of this is widespread prevalence of sub-clinical deficiency of vitamins and microelements. Patients from one of the risk groups, children with atopy, are especially susceptible to this condition. Hypoallergenic diet prescribed as part of the therapeutic measures, is often the cause of imbalanced and irrational nutrition. Modern vitamin complexes may solve the issue of subnormal supply of vitamins and apparent hypovitaminosis in children with allergic diseases.Key words: polyvitamin complexes, atopy, allergic diseases, subnormal supply of vitamins, children.

  9. Towards linking correctness conditions for concurrent objects and contextual trace refinement

    Directory of Open Access Journals (Sweden)

    Brijesh Dongol

    2016-06-01

    Full Text Available Correctness conditions for concurrent objects describe how atomicity of an abstract sequential object may be decomposed. Many different concurrent objects and proof methods for them have been developed. However, arguments about correctness are conducted with respect to an object in isolation. This is in contrast to real-world practice, where concurrent objects are often implemented as part of a programming language library (e.g., java.util.concurrent and are instantiated within a client program. A natural question to ask, then is: How does a correctness condition for a concurrent object ensure correctness of a client program that uses the concurrent object? This paper presents the main issues that surround this question and provides some answers by linking different correctness conditions with a form of trace refinement.

  10. Monaural Sound Localization Based on Reflective Structure and Homomorphic Deconvolution

    Science.gov (United States)

    Park, Yeonseok; Choi, Anthony

    2017-01-01

    The asymmetric structure around the receiver provides a particular time delay for the specific incoming propagation. This paper designs a monaural sound localization system based on the reflective structure around the microphone. The reflective plates are placed to present the direction-wise time delay, which is naturally processed by convolutional operation with a sound source. The received signal is separated for estimating the dominant time delay by using homomorphic deconvolution, which utilizes the real cepstrum and inverse cepstrum sequentially to derive the propagation response’s autocorrelation. Once the localization system accurately estimates the information, the time delay model computes the corresponding reflection for localization. Because of the structure limitation, two stages of the localization process perform the estimation procedure as range and angle. The software toolchain from propagation physics and algorithm simulation realizes the optimal 3D-printed structure. The acoustic experiments in the anechoic chamber denote that 79.0% of the study range data from the isotropic signal is properly detected by the response value, and 87.5% of the specific direction data from the study range signal is properly estimated by the response time. The product of both rates shows the overall hit rate to be 69.1%. PMID:28946625

  11. On the Relations between the Attacks on Symmetric Homomorphic Encryption over the Residue Ring

    Directory of Open Access Journals (Sweden)

    Alina V. Trepacheva

    2017-06-01

    Full Text Available The paper considers the security of symmetric homomorphic cryptosystems (HC over the residue ring. The main task is to establish an equivalence between ciphertexts only attack (COA and known plaintexts attack (KPA for HC. The notion of reducibility between attacks and sufficient condition of reducibility from COA to KPA are given for this purpose. The main idea is: to prove reducibility from COA to KPA we need to find a function over residue ring being efficiently computable and having a small image size comparing with the size of residue ring. The study of reducibility existence is important since it allows to understand better the security level of symmetric HC proposed in literature. A vulnerability against KPA has been already found for the majority of these HC. Thus the reducibility presence can demonstrate that cryptosystems under the study are not secure even against COA, and therefore they are totally insecure and shouldn’t be used in practice. We give an example of reducibility from COA to KPA for residue ring being a simple field. Based on this example we show an efficient COA on one symmetric HC for small field. Also we separately consider the case of residue ring composed using number n being hard-to-factor. For such n an efficient algorithm to construct an efficiently computable function with small image is unknown so far. So further work related to cryptanalysis of existing symmetric HC will be directed into study of functions properties over residue rings modulo numbers hard for factorization.

  12. Towards linking correctness conditions for concurrent objects and contextual trace refinement

    OpenAIRE

    Brijesh Dongol; Lindsay Groves

    2016-01-01

    Correctness conditions for concurrent objects describe how atomicity of an abstract sequential object may be decomposed. Many different concurrent objects and proof methods for them have been developed. However, arguments about correctness are conducted with respect to an object in isolation. This is in contrast to real-world practice, where concurrent objects are often implemented as part of a programming language library (e.g., java.util.concurrent) and are instantiated within a client prog...

  13. Correction

    CERN Multimedia

    2002-01-01

    The photo on the second page of the Bulletin n°48/2002, from 25 November 2002, illustrating the article «Spanish Visit to CERN» was published with a wrong caption. We would like to apologise for this mistake and so publish it again with the correct caption.   The Spanish delegation, accompanied by Spanish scientists at CERN, also visited the LHC superconducting magnet test hall (photo). From left to right: Felix Rodriguez Mateos of CERN LHC Division, Josep Piqué i Camps, Spanish Minister of Science and Technology, César Dopazo, Director-General of CIEMAT (Spanish Research Centre for Energy, Environment and Technology), Juan Antonio Rubio, ETT Division Leader at CERN, Manuel Aguilar-Benitez, Spanish Delegate to Council, Manuel Delfino, IT Division Leader at CERN, and Gonzalo León, Secretary-General of Scientific Policy to the Minister.

  14. Automatic procedure for the correction of thermoelastic stress analysis data acquired in nonadiabatic conditions

    Science.gov (United States)

    Gallotti, A.; Salerno, A.

    2005-12-01

    Thermoelastic stress analysis (TSA), performed on metallic components with a high diffusivity coefficient, seldom reaches adiabatic conditions. As a consequence, TSA results are affected by an attenuation whose entity varies locally, preventing the use of TSA as a reliable quantitative investigation means. The recovery of the adiabatic temperature and of the correct value of the first stress invariant, directly linked to it, can only be performed making an assumption on the local stress distribution. This article presents a method for automatically choosing, among a number of stress distribution functions, the one that performs the best correction of the raw TSA data. The implementation of this automatic correction procedure in a computer program allowed the point-by-point correction of whole TSA images.

  15. Nonterminals, homomorphisms and codings in different variations of OL-systems. I. Deterministic systems

    DEFF Research Database (Denmark)

    Nielsen, Mogens; Rozenberg, Grzegorz; Salomaa, Arto

    1974-01-01

    The use of nonterminals versus the use of homomorphisms of different kinds in the basic types of deterministic OL-systems is studied. A rather surprising result is that in some cases the use of nonterminals produces a comparatively low generative capacity, whereas in some other cases the use of n...

  16. Large and small sets with respect to homomorphisms and products of groups

    Directory of Open Access Journals (Sweden)

    Riccardo Gusso

    2002-10-01

    Full Text Available We study the behaviour of large, small and medium subsets with respect to homomorphisms and products of groups. Then we introduce the definition af a P-small set in abelian groups and we investigate the relations between this kind of smallness and the previous one, giving some examples that distinguish them.

  17. Homomorphic encryption-based secure SIFT for privacy-preserving feature extraction

    Science.gov (United States)

    Hsu, Chao-Yung; Lu, Chun-Shien; Pei, Soo-Chang

    2011-02-01

    Privacy has received much attention but is still largely ignored in the multimedia community. Consider a cloud computing scenario, where the server is resource-abundant and is capable of finishing the designated tasks, it is envisioned that secure media retrieval and search with privacy-preserving will be seriously treated. In view of the fact that scale-invariant feature transform (SIFT) has been widely adopted in various fields, this paper is the first to address the problem of secure SIFT feature extraction and representation in the encrypted domain. Since all the operations in SIFT must be moved to the encrypted domain, we propose a homomorphic encryption-based secure SIFT method for privacy-preserving feature extraction and representation based on Paillier cryptosystem. In particular, homomorphic comparison is a must for SIFT feature detection but is still a challenging issue for homomorphic encryption methods. To conquer this problem, we investigate a quantization-like secure comparison strategy in this paper. Experimental results demonstrate that the proposed homomorphic encryption-based SIFT performs comparably to original SIFT on image benchmarks, while preserving privacy additionally. We believe that this work is an important step toward privacy-preserving multimedia retrieval in an environment, where privacy is a major concern.

  18. Determination of a setup correction function to obtain adsorption kinetic data at stagnation point flow conditions.

    Science.gov (United States)

    Mora, Maria F; Nejadnik, M Reza; Baylon-Cardiel, Javier L; Giacomelli, Carla E; Garcia, Carlos D

    2010-06-01

    This paper is the first report on the characterization of the hydrodynamic conditions in a flow cell designed to study adsorption processes by spectroscopic ellipsometry. The resulting cell enables combining the advantages of in situ spectroscopic ellipsometry with stagnation point flow conditions. An additional advantage is that the proposed cell features a fixed position of the "inlet tube" with respect to the substrate, thus facilitating the alignment of multiple substrates. Theoretical calculations were performed by computational fluid dynamics and compared with experimental data (adsorption kinetics) obtained for the adsorption of polyethylene glycol to silica under a variety of experimental conditions. Additionally, a simple methodology to correct experimental data for errors associated with the size of the measured spot and for variations of mass transfer in the vicinity of the stagnation point is herein introduced. The proposed correction method would allow researchers to reasonably estimate the adsorption kinetics at the stagnation point and quantitatively compare their results, even when using different experimental setups. The applicability of the proposed correction function was verified by evaluating the kinetics of protein adsorption under different experimental conditions. Published by Elsevier Inc.

  19. A correction function method for the wave equation with interface jump conditions

    Science.gov (United States)

    Abraham, David S.; Marques, Alexandre Noll; Nave, Jean-Christophe

    2018-01-01

    In this paper a novel method to solve the constant coefficient wave equation, subject to interface jump conditions, is presented. In general, such problems pose issues for standard finite difference solvers, as the inherent discontinuity in the solution results in erroneous derivative information wherever the stencils straddle the given interface. Here, however, the recently proposed Correction Function Method (CFM) is used, in which correction terms are computed from the interface conditions, and added to affected nodes to compensate for the discontinuity. In contrast to existing methods, these corrections are not simply defined at affected nodes, but rather generalized to a continuous function within a small region surrounding the interface. As a result, the correction function may be defined in terms of its own governing partial differential equation (PDE) which may be solved, in principle, to arbitrary order of accuracy. The resulting scheme is not only arbitrarily high order, but also robust, having already seen application to Poisson problems and the heat equation. By extending the CFM to this new class of PDEs, the treatment of wave interface discontinuities in homogeneous media becomes possible. This allows, for example, for the straightforward treatment of infinitesimal source terms and sharp boundaries, free of staircasing errors. Additionally, new modifications to the CFM are derived, allowing compatibility with explicit multi-step methods, such as Runge-Kutta (RK4), without a reduction in accuracy. These results are then verified through numerous numerical experiments in one and two spatial dimensions.

  20. Exact finite-size corrections for the spanning-tree model under different boundary conditions

    Science.gov (United States)

    Izmailian, N. Sh.; Kenna, R.

    2015-02-01

    We express the partition functions of the spanning tree on finite square lattices under five different sets of boundary conditions in terms of a principal partition function with twisted-boundary conditions. Based on these expressions, we derive the exact asymptotic expansions of the logarithm of the partition function for each case. We have also established several groups of identities relating spanning-tree partition functions for the different boundary conditions. We also explain an apparent discrepancy between logarithmic correction terms in the free energy for a two-dimensional spanning-tree model with periodic and free-boundary conditions and conformal field theory predictions. We have obtained corner free energy for the spanning tree under free-boundary conditions in full agreement with conformal field theory predictions.

  1. On the Complexity of Additively Homomorphic UC Commitments

    DEFF Research Database (Denmark)

    Trifiletti, Roberto; Nielsen, Jesper Buus; Frederiksen, Tore Kasper

    2016-01-01

    as the commitment protocol by Garay \\emph{et al.} from Eurocrypt 2014. A main technical improvement over the scheme mentioned above, and other schemes based on using error correcting codes for UC commitment, we develop a new technique which allows to based the extraction property on erasure decoding as opposed...

  2. CORRECTION AND COMPENSATION ROLE OF RECREATION IN LIVING AND WORKING CONDITIONS OF A MODERN MAN

    Directory of Open Access Journals (Sweden)

    Budimir Bijelić

    2007-05-01

    Full Text Available Nowadays, living and working conditions have reduced a modern man s motion and power activities in leisure and operating circumstances. Beside the dominant hypokinezis, there are many other factors which have negative infl uence on biological structure and health status of a modern man. Correction and compensation of the functions disturbed as well as a body structure can be performed effi ciently on a healthy basis only with adequate training programs. The training process is particularly effi cient when it is being performed under the direct infl uence of natural factors such as sun, fresh air and water.

  3. Corrections to the Rankine-Hugoniot conditions for curved shock waves

    Science.gov (United States)

    Lancellotti, Carlo; Yue, Yubei

    2014-12-01

    Several years ago, Carlo Cercignani and one of the authors in a paper (C. Cercignani, 2991) performed a mathe-matical analysis of the corrections to the Rankine-Hugoniot conditions due to the curvature of a shock front, using singular perturbation methods in order to "connect" the solutions to the the Boltzmann equation inside and outside the shock layer. It turned out that these corrections can be obtained at leading order by integrating appropriately the Boltzmann shock profile for a planar (one-dimensional in space) shock wave. However, they are entirely due to the spatially asymmetry of the shock, and they vanish if the shock is described using a simple bi-modal ansatz like the well-know Mott-Smith model. In the present work we extend and simplify the previous results, and then use a recently-developed deterministic (spectral) Boltzmann solver for a gas of hard-spheres in order to obtain accurate numerical values for the curvature corrections.

  4. About Cryptanalysis of One Fully Homomorphic Cryptosystem Based on Factorization Problem

    Directory of Open Access Journals (Sweden)

    Alina Viktorovna Trepacheva

    2015-12-01

    Full Text Available We present a known plaintext attack (KPA on a recently proposed fully homomorphic cryptosystem (FHC, based on the problem of big integers factoring. We show that the considered FHC is insecure against KPA even if only one pair (plaintext, ciphertext was intercepted by an adversary. The complexity of the proposed KPA depends polynomially on the parameters of FHC and logarithmically on the size of plaintexts space. Also we discuss how ciphertexts only attack (COA on this FHC may be reduced to KPA.

  5. Homomorphic sex chromosomes and the intriguing Y chromosome of Ctenomys rodent species (Rodentia, Ctenomyidae).

    Science.gov (United States)

    Suárez-Villota, Elkin Y; Pansonato-Alves, José C; Foresti, Fausto; Gallardo, Milton H

    2014-01-01

    Unlike the X chromosome, the mammalian Y chromosome undergoes evolutionary decay resulting in small size. This sex chromosomal heteromorphism, observed in most species of the fossorial rodent Ctenomys, contrasts with the medium-sized, homomorphic acrocentric sex chromosomes of closely related C. maulinus and C. sp. To characterize the sequence composition of these chromosomes, fluorescent banding, self-genomic in situ hybridization, and fluorescent in situ hybridization with an X painting probe were performed on mitotic and meiotic plates. High molecular homology between the sex chromosomes was detected on mitotic material as well as on meiotic plates immunodetected with anti-SYCP3 and anti-γH2AX. The Y chromosome is euchromatic, poor in repetitive sequences and differs from the X by the loss of a block of pericentromeric chromatin. Inferred from the G-banding pattern, an inversion and the concomitant prevention of recombination in a large asynaptic region seems to be crucial for meiotic X chromosome inactivation. These peculiar findings together with the homomorphism of Ctenomys sex chromosomes are discussed in the light of the regular purge that counteracts Muller's ratchet and the probable mechanisms accounting for their origin and molecular homology. © 2014 S. Karger AG, Basel.

  6. Validity of Differently Bias-Corrected Regional Climate Model Simulations for Streamflow Simulations under Changing Climate Conditions

    Science.gov (United States)

    Teutschbein, C.; Seibert, J.

    2012-04-01

    The direct application of Regional Climate Model (RCM) simulations in hydrological climate-change impact studies can be questionable due to the potential risk for considerable biases. Several bias correction approaches - ranging from simple scaling to rather sophisticated methods - have been developed to help impact modelers coping with the various problems linked to biased RCM output. The main disadvantage of any of these correction procedures is their underlying assumption of stationarity: the correction algorithm and its parameterization for current climate are expected to also be valid for future climate conditions. Whether or not this presupposition is actually fulfilled for future conditions cannot be evaluated - given our lack of time machines. Nevertheless, systematic testing of how well bias correction procedures perform for conditions different from those used for calibration can be done by applying a differential split-sample as proposed by Klemeš ["Operational testing of hydrological simulation models", Hydrological Sciences Journal 31, no. 1 (1986): 13-24]. This contribution summarizes shortly available bias correction methods and demonstrates their application using the example of an ensemble of 11 different RCM-simulated temperature and precipitation series. We then applied a differential split-sample test which enabled us to evaluate the performance of different bias correction procedures under changing climate conditions with only a limited amount of data (30-year records). Furthermore, we evaluated the different correction methods based on their combined influence on hydrological simulations of monthly mean streamflow as well as spring and autumn flood peaks for five meso-scale catchments in Sweden under current (1961-1990) and future (2021-2050) climate conditions. This differential split-sample test resulted in a large spread and a clear bias for some of the correction methods during validation based on an independent data set. More

  7. The Specific Features of the Pathogenesis and Correction of Critical Conditions in Obstetric Care

    Directory of Open Access Journals (Sweden)

    Yu. S. Podolsky

    2012-01-01

    Full Text Available Objective: to analyze the research areas determining the pathogenesis and correction of critical conditions in obstetric care in the past 15 years on the basis of the dissertations made at the V. A. Negovsky Research Institute of General Reanimatology. Subjects and methods. Nine hundred and twenty-nine pregnant women, parturients, and puerperas were examined; the latter were allocated to comparison groups in terms of age, weight, comorbidity, performed intensive therapy and underwent both retrospective and prospective analysis from 1981 to 2010. The comparison group comprised 44 nonobstetric patients while examining multiple organ dysfunction (MOD in the purperas. The latter with massive blood loss were separately identified when evaluating the impaired oxygen status in patients with systemic inflammatory response syndrome and MOD. According to the pathology and indicators under study, the puerperas with MOD were examined in a few steps (2 to 7. Water sectoral disorders were detected in three steps: on days 1, 3, and 5; these were identified in four steps in case of eclamptic coma (EC, regional anesthesia, and impaired oxygen status. Results. The findings are suggestive of significant impairments in central hemodynamics (CHD in the severe forms of gestosis, which are caused by reductions in cardiac index and circulating blood volume, the basis for these is hypovolemia. Dyshidrosis appears as an increased extracellular sector mainly due to interstitial hyperhydration. The low values of arterial blood oxygen, its delivery and uptake, oxygen extract coefficient and the high value of oxygen debt (OD confirmed blood shunting or circulatory centralization, which was indicative of visceral hypoxia. Determination of the level of cerebral blood flow (CBF in puerperas with coma showed its diminution due to reduced blood flow in the cortical structures. Regional anesthesia in complicated pregnancy and delivery stabilized CHD, dropped the level of

  8. Decomposing highly edge-connected graphs into homomorphic copies of a fixed tree

    DEFF Research Database (Denmark)

    Merker, Martin

    2016-01-01

    far this conjecture has only been verified for paths, stars, and a family of bistars. We prove a weaker version of the Tree Decomposition Conjecture, where we require the subgraphs in the decomposition to be isomorphic to graphs that can be obtained from T by vertex-identifications. We call......The Tree Decomposition Conjecture by Barát and Thomassen states that for every tree T there exists a natural number k(T) such that the following holds: If G is a k(T)-edge-connected simple graph with size divisible by the size of T, then G can be edge-decomposed into subgraphs isomorphic to T. So...... such a subgraph a homomorphic copy of T. This implies the Tree Decomposition Conjecture under the additional constraint that the girth of G is greater than the diameter of T. As an application, we verify the Tree Decomposition Conjecture for all trees of diameter at most 4....

  9. Universally Composable Symbolic Analysis for Two-Party Protocols based on Homomorphic Encryption

    DEFF Research Database (Denmark)

    Dahl, Morten; Damgård, Ivan Bjerre

    that if the protocol realises a given ideal functionality in the symbolic setting, then the original version also realises the ideal functionality in the standard computational UC setting. In other words, the theorem allows us to transfer a proof in the abstract symbolic setting to a proof in the standard UC model......We consider a class of two-party function evaluation protocols in which the parties are allowed to use ideal functionalities as well as a set of powerful primitives, namely commitments, homomorphic encryption, and certain zero-knowledge proofs. We illustrate that with these it is possible....... Finally, we show that the symbolic interpretation is simple enough in a number of cases for the symbolic proof to be partly automated using ProVerif...

  10. A Regev-Type Fully Homomorphic Encryption Scheme Using Modulus Switching

    Science.gov (United States)

    Chen, Zhigang; Wang, Jian; Song, Xinxia

    2014-01-01

    A critical challenge in a fully homomorphic encryption (FHE) scheme is to manage noise. Modulus switching technique is currently the most efficient noise management technique. When using the modulus switching technique to design and implement a FHE scheme, how to choose concrete parameters is an important step, but to our best knowledge, this step has drawn very little attention to the existing FHE researches in the literature. The contributions of this paper are twofold. On one hand, we propose a function of the lower bound of dimension value in the switching techniques depending on the LWE specific security levels. On the other hand, as a case study, we modify the Brakerski FHE scheme (in Crypto 2012) by using the modulus switching technique. We recommend concrete parameter values of our proposed scheme and provide security analysis. Our result shows that the modified FHE scheme is more efficient than the original Brakerski scheme in the same security level. PMID:25093212

  11. Stability of a Generalized Euler-Lagrange Type Additive Mapping and Homomorphisms in C∗-Algebras

    Directory of Open Access Journals (Sweden)

    Abbas Najati

    2009-01-01

    Full Text Available Let X,Y be Banach modules over a C∗-algebra and let r1,…,rn∈ℝ be given. We prove the generalized Hyers-Ulam stability of the following functional equation in Banach modules over a unital C∗-algebra: ∑j=1nf(−rjxj+∑1≤i≤n,i≠jrixi+2∑i=1nrif(xi=nf(∑i=1nrixi. We show that if ∑i=1nri≠0, ri,rj≠0 for some 1≤ihomomorphisms in unital C∗-algebras.

  12. Evidence for a Common Origin of Homomorphic and Heteromorphic Sex Chromosomes in Distinct Spinacia Species.

    Science.gov (United States)

    Fujito, Satoshi; Takahata, Satoshi; Suzuki, Reimi; Hoshino, Yoichiro; Ohmido, Nobuko; Onodera, Yasuyuki

    2015-06-05

    The dioecious genus Spinacia is thought to include two wild relatives (S. turkestanica Ilj. and S. tetrandra Stev.) of cultivated spinach (S. oleracea L.). In this study, nuclear and chloroplast sequences from 21 accessions of Spinacia germplasm and six spinach cultivars or lines were subjected to phylogenetic analysis to define the relationships among the three species. Maximum-likelihood sequence analysis suggested that the Spinacia plant samples could be classified into two monophyletic groups (Group 1 and Group 2): Group 1 consisted of all accessions, cultivars, and lines of S. oleracea L. and S. turkestanica Ilj. and two of five S. tetrandra Stev. accessions, whereas Group 2 was composed of the three remaining S. tetrandra Stev. accessions. By using flow cytometry, we detected a distinct difference in nuclear genome size between the groups. Group 2 also was characterized by a sexual dimorphism in inflorescence structure, which was not observed in Group 1. Interspecific crosses between the groups produced hybrids with drastically reduced pollen fertility and showed that the male is the heterogametic sex (XY) in Group 2, as is the case in S. oleracea L. (Group 1). Cytogenetic and DNA marker analyses suggested that Group 1 and Group 2 have homomorphic and heteromorphic sex chromosome pairs (XY), respectively, and that the sex chromosome pairs of the two groups evolved from a common ancestral pair. Our data suggest that the Spinacia genus may serve as a good model for investigation of evolutionary mechanisms underlying the emergence of heteromorphic sex chromosome pairs from ancestral homomorphic pairs. Copyright © 2015 Fujito et al.

  13. (Non-) homomorphic approaches to denoise intensity SAR images with non-local means and stochastic distances

    Science.gov (United States)

    Penna, Pedro A. A.; Mascarenhas, Nelson D. A.

    2018-02-01

    The development of new methods to denoise images still attract researchers, who seek to combat the noise with the minimal loss of resolution and details, like edges and fine structures. Many algorithms have the goal to remove additive white Gaussian noise (AWGN). However, it is not the only type of noise which interferes in the analysis and interpretation of images. Therefore, it is extremely important to expand the filters capacity to different noise models present in li-terature, for example the multiplicative noise called speckle that is present in synthetic aperture radar (SAR) images. The state-of-the-art algorithms in remote sensing area work with similarity between patches. This paper aims to develop two approaches using the non local means (NLM), developed for AWGN. In our research, we expanded its capacity for intensity SAR ima-ges speckle. The first approach is grounded on the use of stochastic distances based on the G0 distribution without transforming the data to the logarithm domain, like homomorphic transformation. It takes into account the speckle and backscatter to estimate the parameters necessary to compute the stochastic distances on NLM. The second method uses a priori NLM denoising with a homomorphic transformation and applies the inverse Gamma distribution to estimate the parameters that were used into NLM with stochastic distances. The latter method also presents a new alternative to compute the parameters for the G0 distribution. Finally, this work compares and analyzes the synthetic and real results of the proposed methods with some recent filters of the literature.

  14. [Rectal temperature-time of death nomogram: dependence of corrective factors of body weight in significant thermal insulating conditions].

    Science.gov (United States)

    Henssge, C

    1992-01-01

    98 test coolings were made under various cooling conditions (moving air, two types of both clothing and covering) on dummies of real masses of 1, 3.3, 9.9, 24.5 and 33.4 kg resp. which cool under standard conditions (unclothed, uncovered, still air) like human bodies of 14, 33, 41, 83 and 104 kg resp. The results provide evidence on a nonlinear dependence of corrective factors of body weight upon the body weight. The dynamics of the dependence increases with the thickness of thermic isolation. Transferred to the use of the nomogram method on bodies, cooling conditions requiring corrective factors known by experience between 0.75 (moving air) and 1.3 (rather thin clothing/covering) can be used as in the past independent on the body weight. Only in higher corrective factors for thicker clothing/covering according to experience the dependence of corrective factors on the body weight must be taken into account in bodies of a very high or low body weight. Beside a simplified table a formula for computing is also given for that purpose.

  15. Purkinje cell activity during classical conditioning with different conditional stimuli explains central tenet of Rescorla–Wagner model [corrected].

    Science.gov (United States)

    Rasmussen, Anders; Zucca, Riccardo; Johansson, Fredrik; Jirenhed, Dan-Anders; Hesslow, Germund

    2015-11-10

    A central tenet of Rescorla and Wagner's model of associative learning is that the reinforcement value of a paired trial diminishes as the associative strength between the presented stimuli increases. Despite its fundamental importance to behavioral sciences, the neural mechanisms underlying the model have not been fully explored. Here, we present findings that, taken together, can explain why a stronger association leads to a reduced reinforcement value, within the context of eyeblink conditioning. Specifically, we show that learned pause responses in Purkinje cells, which trigger adaptively timed conditioned eyeblinks, suppress the unconditional stimulus (US) signal in a graded manner. Furthermore, by examining how Purkinje cells respond to two distinct conditional stimuli and to a compound stimulus, we provide evidence that could potentially help explain the somewhat counterintuitive overexpectation phenomenon, which was derived from the Rescorla-Wagner model.

  16. Semantically Secure Symmetric Encryption with Error Correction for Distributed Storage

    Directory of Open Access Journals (Sweden)

    Juha Partala

    2017-01-01

    Full Text Available A distributed storage system (DSS is a fundamental building block in many distributed applications. It applies linear network coding to achieve an optimal tradeoff between storage and repair bandwidth when node failures occur. Additively homomorphic encryption is compatible with linear network coding. The homomorphic property ensures that a linear combination of ciphertext messages decrypts to the same linear combination of the corresponding plaintext messages. In this paper, we construct a linearly homomorphic symmetric encryption scheme that is designed for a DSS. Our proposal provides simultaneous encryption and error correction by applying linear error correcting codes. We show its IND-CPA security for a limited number of messages based on binary Goppa codes and the following assumption: when dividing a scrambled generator matrix G^ into two parts G1^ and G2^, it is infeasible to distinguish G2^ from random and to find a statistical connection between G1^ and G2^. Our infeasibility assumptions are closely related to those underlying the McEliece public key cryptosystem but are considerably weaker. We believe that the proposed problem has independent cryptographic interest.

  17. Seasonal streamflow forecasting: experiences with precipitation bias correction and SPI conditioning to improve performance for hydrological events

    Science.gov (United States)

    Ramos, M. H.; Crochemore, L.; Pappenberger, F.; Perrin, C.

    2016-12-01

    Many fields such as drought risk assessment or reservoir management can benefit from seasonal streamflow forecasts. This study presents the results of two analyses aiming to: 1) assess the skill of seasonal precipitation forecasts in France and provide insights into the way bias correcting precipitation forecasts can improve the skill of streamflow forecasts at extended lead times, and 2) evaluate how the conditioning of historical data based on the Standardized Precipitation Index (SPI) from bias-corrected GCM precipitation forecasts can be useful to select traces within the historical data and further improve the forecast of droughts. We evaluated several bias correction approaches and conditioned precipitation scenarios in sixteen catchments in France, with the help of ECMWF System 4 seasonal precipitation forecasts and the GR6J hydrological model. The results show that, in most catchments, raw seasonal precipitation and streamflow forecasts are often sharper than the conventional ESP method. However, they are not significantly better in terms of reliability. Forecast skill is generally improved when applying bias correction. The simple linear scaling of monthly values contributed mainly to increase forecast sharpness and accuracy, while the empirical distribution mapping of daily values was successful in improving forecast reliability. Our results also show that conditioning past observations based on the three-month Standardized Precipitation Index (SPI3) can improve the sharpness of ensemble forecasts based on historical data, while maintaining good reliability. An evaluation of forecast ensembles for low-flow forecasting showed that the SPI3-conditioned ensembles provided reliable forecasts of low-flow duration and deficit volume based on the 80th exceedance percentile. Drought risk forecasting is illustrated for the 2003 drought event.

  18. Rectal temperature time of death nomogram: dependence of corrective factors on the body weight under stronger thermic insulation conditions.

    Science.gov (United States)

    Henssge, C

    1992-04-01

    Ninety-eight test coolings were made under various cooling conditions (moving air, two types of both clothing and covering) on dummies of real masses of 1, 3.3, 9.9, 24.5 and 33.4 kg, respectively, which cool under standard conditions (unclothed, uncovered, still air) like human bodies of 14, 33, 41, 83 and 104 kg, respectively. The results provide evidence of a non-linear dependence of corrective factors of body weight upon the body weight. The dynamics of the dependence increases with the thickness of thermic insulation. Transferred to the use of the nomogram method on bodies, cooling conditions requiring corrective factors between 0.75 (moving air) and 1.3 (rather thin clothing/covering), known from experience on bodies of an average weight, can be used as in the past, independent of the body weight. According to experience the dependence of corrective factors on the body weight must be taken into account in bodies of a very high or low body weight. For that purpose both a simplified table and a formula for computing is given.

  19. Using alternative biological information in stock assessment: condition-corrected natural mortality of Eastern Baltic cod

    DEFF Research Database (Denmark)

    Casini, Michele; Eero, Margit; Carlshamre, Sofia

    2016-01-01

    its survival. We used results from published experimental literature linking cod condition to starvation and mortality, to estimate the annual proportion of cod close to the lethal condition level in the Eastern Baltic cod stock. Thereafter we applied these results to adjust the natural mortality (M...... M = 0.2. This method could be used for adjusting natural mortalities for other cod stocks where changes in condition are observed....

  20. Do simple models give a correct description of the wind condition in a coastal area ?

    Energy Technology Data Exchange (ETDEWEB)

    Kaellstrand, B. [Uppsala Univ. (Sweden). Dept. of Meteorology

    1996-12-01

    When the surface conditions changes at a coastline, an internal boundary layer evolves, with a wind speed and turbulence intensity influenced by these new conditions. Aircraft measurements across the coastline, performed during near neutral conditions, are compared with a model and thirteen more simple expressions for the growth of an internal boundary layer (IBL). The majority of the expressions overestimate the IBL height, while other underestimate it. Some of the expressions give reasonable result close to the coast. The model gives good agreement, even for larger distances. The vertical potential temperature gradient turned out to be an important parameter for the growth of the IBL, even with this near neutral conditions. 21 refs, 5 figs, 1 tab

  1. Secure Data Aggregation with Fully Homomorphic Encryption in Large-Scale Wireless Sensor Networks.

    Science.gov (United States)

    Li, Xing; Chen, Dexin; Li, Chunyan; Wang, Liangmin

    2015-07-03

    With the rapid development of wireless communication technology, sensor technology, information acquisition and processing technology, sensor networks will finally have a deep influence on all aspects of people's lives. The battery resources of sensor nodes should be managed efficiently in order to prolong network lifetime in large-scale wireless sensor networks (LWSNs). Data aggregation represents an important method to remove redundancy as well as unnecessary data transmission and hence cut down the energy used in communication. As sensor nodes are deployed in hostile environments, the security of the sensitive information such as confidentiality and integrity should be considered. This paper proposes Fully homomorphic Encryption based Secure data Aggregation (FESA) in LWSNs which can protect end-to-end data confidentiality and support arbitrary aggregation operations over encrypted data. In addition, by utilizing message authentication codes (MACs), this scheme can also verify data integrity during data aggregation and forwarding processes so that false data can be detected as early as possible. Although the FHE increase the computation overhead due to its large public key size, simulation results show that it is implementable in LWSNs and performs well. Compared with other protocols, the transmitted data and network overhead are reduced in our scheme.

  2. Minutiae matching with privacy protection based on the combination of garbled circuit and homomorphic encryption.

    Science.gov (United States)

    Li, Mengxing; Feng, Quan; Zhao, Jian; Yang, Mei; Kang, Lijun; Wu, Lili

    2014-01-01

    Biometrics plays an important role in authentication applications since they are strongly linked to holders. With an increasing growth of e-commerce and e-government, one can expect that biometric-based authentication systems are possibly deployed over the open networks in the near future. However, due to its openness, the Internet poses a great challenge to the security and privacy of biometric authentication. Biometric data cannot be revoked, so it is of paramount importance that biometric data should be handled in a secure way. In this paper we present a scheme achieving privacy-preserving fingerprint authentication between two parties, in which fingerprint minutiae matching algorithm is completed in the encrypted domain. To improve the efficiency, we exploit homomorphic encryption as well as garbled circuits to design the protocol. Our goal is to provide protection for the security of template in storage and data privacy of two parties in transaction. The experimental results show that the proposed authentication protocol runs efficiently. Therefore, the protocol can run over open networks and help to alleviate the concerns on security and privacy of biometric applications over the open networks.

  3. Minutiae Matching with Privacy Protection Based on the Combination of Garbled Circuit and Homomorphic Encryption

    Directory of Open Access Journals (Sweden)

    Mengxing Li

    2014-01-01

    Full Text Available Biometrics plays an important role in authentication applications since they are strongly linked to holders. With an increasing growth of e-commerce and e-government, one can expect that biometric-based authentication systems are possibly deployed over the open networks in the near future. However, due to its openness, the Internet poses a great challenge to the security and privacy of biometric authentication. Biometric data cannot be revoked, so it is of paramount importance that biometric data should be handled in a secure way. In this paper we present a scheme achieving privacy-preserving fingerprint authentication between two parties, in which fingerprint minutiae matching algorithm is completed in the encrypted domain. To improve the efficiency, we exploit homomorphic encryption as well as garbled circuits to design the protocol. Our goal is to provide protection for the security of template in storage and data privacy of two parties in transaction. The experimental results show that the proposed authentication protocol runs efficiently. Therefore, the protocol can run over open networks and help to alleviate the concerns on security and privacy of biometric applications over the open networks.

  4. Efficient Multi-keyword Ranked Search over Outsourced Cloud Data based on Homomorphic Encryption

    Directory of Open Access Journals (Sweden)

    Nie Mengxi

    2016-01-01

    Full Text Available With the development of cloud computing, more and more data owners are motivated to outsource their data to the cloud server for great flexibility and less saving expenditure. Because the security of outsourced data must be guaranteed, some encryption methods should be used which obsoletes traditional data utilization based on plaintext, e.g. keyword search. To solve the search of encrypted data, some schemes were proposed to solve the search of encrypted data, e.g. top-k single or multiple keywords retrieval. However, the efficiency of these proposed schemes is not high enough to be impractical in the cloud computing. In this paper, we propose a new scheme based on homomorphic encryption to solve this challenging problem of privacy-preserving efficient multi-keyword ranked search over outsourced cloud data. In our scheme, the inner product is adopted to measure the relevance scores and the technique of relevance feedback is used to reflect the search preference of the data users. Security analysis shows that the proposed scheme can meet strict privacy requirements for such a secure cloud data utilization system. Performance evaluation demonstrates that the proposed scheme can achieve low overhead on both computation and communication.

  5. Molecular differentiation of the homomorphic sex chromosomes in Megaselia scalaris (Diptera) detected by random DNA probes.

    Science.gov (United States)

    Willhoeft, U; Traut, W

    1990-08-01

    Randomly cloned DNA fragments and a poly-(GATA) containing sequence were used as probes to identify sex chromosomal inheritance and to detect differences at the molecular level between the homomorphic X and Y in the phorid fly, Megaselia scalaris. Restriction fragment length differences between males and females and between two laboratory stocks of different geographic origin were used to differentiate between sex chromosomal and autosomal origin of the respective fragments. Five random probes detected X and Y chromosomal DNA loci and two others recognized autosomal DNA loci. One random probe and the poly(GATA) probe hybridized with both sex chromosomal and autosomal restriction fragments. Most of the Y chromosomal restriction fragments were conserved in length between the two stocks while most of the X chromosomal and autosomal fragments showed length polymorphism. It was concluded, therefore, that the Y chromosome contains a conserved segment in which crossover is suppressed and restriction site differences have accumulated relative to the X. These chromosomes, therefore, conform to a theoretically expected early stage of sex chromosome evolution.

  6. Using alternative biological information in stock assessment: condition-corrected natural mortality of Eastern Baltic cod

    DEFF Research Database (Denmark)

    Casini, Michele; Eero, Margit; Carlshamre, Sofia

    2016-01-01

    The inclusion of biological and ecological aspects in the assessment of fish population status is one of the bases for an ecosystem-based fisheries management. During the past two decades the Eastern Baltic cod has experienced a drastic reduction in growth and body condition that may have affected......) assumed in the analytical stock assessment model. The results in terms of Spawning Stock Biomass (SSB), Fishing mortality (F) and Recruitment (R) in the final year from the stock assessment using M values adjusted for low condition were up to 40% different compared with the assessment assuming a constant...

  7. The Role of Exposure Condition in the Effectiveness of Explicit Correction

    Science.gov (United States)

    Yilmaz, Yucel

    2016-01-01

    This article reports on a study that investigated the effects of two feedback exposure conditions on the acquisition of two Turkish morphemes. The study followed a randomized experimental design with an immediate and a delayed posttest. Forty-two Chinese-speaking learners of Turkish were randomly assigned to one of three groups: receivers,…

  8. Attitudes of young adults to prenatal screening and genetic correction for human attributes and psychiatric conditions.

    Science.gov (United States)

    Milner, K K; Collins, E E; Connors, G R; Petty, E M

    1998-03-05

    With recent advances in DNA technology, questions have arisen as to how this technology should be appropriately used. In this article, results obtained from a survey designed to elicit attitudes of college students to prenatal testing and gene therapy for human attributes and psychiatric conditions are reported. The eleven hypothetical disease phenotypes included schizophrenia, alcoholism, tendency toward violent behavior, attention deficit/hyperactivity disorder, depression requiring medical treatment, obesity, involvement in "dangerous" sports activities, homosexuality, borderline normal IQ (80-100), proportional short stature, and inability to detect perfect pitch. Most students supported prenatal genetic testing for psychiatric disorders and behavior that might result in harm to others (i.e., tendency towards violent behavior) and found prenatal genetic testing for human attributes less desirable. However, the lack of unilateral agreement or disagreement toward any one condition or attribute suggests the potential difficulties ahead in the quest for guidelines for the application of new technologies available to manipulate the human genome.

  9. Hydrological Modeling in Northern Tunisia with Regional Climate Model Outputs: Performance Evaluation and Bias-Correction in Present Climate Conditions

    Directory of Open Access Journals (Sweden)

    Asma Foughali

    2015-07-01

    Full Text Available This work aims to evaluate the performance of a hydrological balance model in a watershed located in northern Tunisia (wadi Sejnane, 378 km2 in present climate conditions using input variables provided by four regional climate models. A modified version (MBBH of the lumped and single layer surface model BBH (Bucket with Bottom Hole model, in which pedo-transfer parameters estimated using watershed physiographic characteristics are introduced is adopted to simulate the water balance components. Only two parameters representing respectively the water retention capacity of the soil and the vegetation resistance to evapotranspiration are calibrated using rainfall-runoff data. The evaluation criterions for the MBBH model calibration are: relative bias, mean square error and the ratio of mean actual evapotranspiration to mean potential evapotranspiration. Daily air temperature, rainfall and runoff observations are available from 1960 to 1984. The period 1960–1971 is selected for calibration while the period 1972–1984 is chosen for validation. Air temperature and precipitation series are provided by four regional climate models (DMI, ARP, SMH and ICT from the European program ENSEMBLES, forced by two global climate models (GCM: ECHAM and ARPEGE. The regional climate model outputs (precipitation and air temperature are compared to the observations in terms of statistical distribution. The analysis was performed at the seasonal scale for precipitation. We found out that RCM precipitation must be corrected before being introduced as MBBH inputs. Thus, a non-parametric quantile-quantile bias correction method together with a dry day correction is employed. Finally, simulated runoff generated using corrected precipitation from the regional climate model SMH is found the most acceptable by comparison with runoff simulated using observed precipitation data, to reproduce the temporal variability of mean monthly runoff. The SMH model is the most accurate to

  10. The effectiveness of the pilot program of differentiated correction of psycho-physical condition of students in physical education

    Directory of Open Access Journals (Sweden)

    Lukavenko A.V.

    2013-05-01

    Full Text Available Defined and justified the designing an algorithm for the formation and operation of the content of physical education students. The algorithm is aimed at correcting the mental and physical condition of students in the relevant classes in high school. In the experiment involved a group of boys and girls of 20 people 17-18 years of age.The program provides theoretical and methodological, practical training, and certain types of control. The basis of the program is a differentiated approach to students with the features of display, speakers, self-determination, the relationship between the change in indicators of mental and physical state in the first year of study. Project operations are focused on meeting the requirements of the principles of physical education, the provisions of the public education on maintaining a physically active lifestyle. It is recommended for theoretical and methodological training of the use of modern information tools. Showing the direction of correction of psycho-physical condition of students.

  11. COMPLEX PSIHOLOGO-PEDAGOGICAL CORRECTION OF CHILDREN WITH RDA – A NECESSARY CONDITION OF SUCCESSFUL INTEGRATION OF THE CHILD IN SOCIETY

    Directory of Open Access Journals (Sweden)

    Kondakova Olga Nikolaevna

    2013-02-01

    Full Text Available In article on the basis of the analysis of modern researches of a problem of early children's autism correctional work with the autichny child is presented. The structure of psikhologo-pedagogical process of correction of children with early children's autism is described. Purpose: to present system of complex psikhologo-pedagogical correction of children with RDA as a necessary condition of their integration into society. Method or methodology of carrying out work: methodology of pedagogical research Results: the system of complex psikhologo-pedagogical correction of children offered by the author with RDA can be introduced in system of vocational (correctional education, as passed approbation within work of the Regional center of diagnostics and correction. Scope of results: practice of modern vocational (correctional education.

  12. COMPLEX PSIHOLOGO-PEDAGOGICAL CORRECTION OF CHILDREN WITH RDA – A NECESSARY CONDITION OF SUCCESSFUL INTEGRATION OF THE CHILD IN SOCIETY

    Directory of Open Access Journals (Sweden)

    Ольга Николаевна Кондакова

    2013-04-01

    Full Text Available In article on the basis of the analysis of modern researches of a problem of early children's autism correctional work with the autichny child is presented. The structure of psikhologo-pedagogical process of correction of children with early children's autism is described.Purpose: to present system of complex psikhologo-pedagogical correction of children with RDA as a necessary condition of their integration into society.Method or methodology of carrying out work: methodology of pedagogical researchResults: the system of complex psikhologo-pedagogical correction of children offered by the author with RDA can be introduced in system of vocational (correctional education, as passed approbation within work of the Regional center of diagnostics and correction.Scope of results: practice of modern vocational (correctional education.DOI: http://dx.doi.org/10.12731/2218-7405-2013-2-20

  13. Correction of Hemodynamics with Hypertonic Sodium Chloride Solution in Critical Conditions

    Directory of Open Access Journals (Sweden)

    P. S. Zhbannikov

    2007-01-01

    Full Text Available Objective: to assess the capabilities of small-volume hypertonic infusion in the context of early goal-directed therapy for critical conditions in surgical patients.Subjects and methods. Twenty-nine patients (SAPS II 47.5±6.81 scores operated on for generalized peritonitis (n=24 or severe concomitant injury with damages to chest and/or abdominal organs (n=5 who had the clinical and laboratory signs of a systemic inflammatory reaction were intravenously injected 4 ml/kg of 7.5% of hypertonic sodium chloride solution (HS and colloidal solution, followed by infusion and, if indicated, inotropic maintenance of hemodynamics for 6 hours in order to achieve the goal vales of mean blood pressure (BP, central venous pressure (CVP, central venous blood oxygen saturation (ScvO2, and diuresis. Plasma concentrations of sodium, chlorine, and lactate, acid-base balance, and osmotic blood pressure were monitored.Results. The patients were found to have infusion therapy-refractory critical arterial hypotension, low ScvO2, and oliguria before small-volume circulation maintenance. In all the patients, HS infusion originally caused a rapid rise in BP up to the goal value, with its further colloid infusion maintenance requiring additional dopamine infusion in 12 patients and red blood cell transfusion in 3. This could stabilize over 6 hours BP at the required level in 25 patients, in 9 of whom CVP only approximated the goal value. All the patients were found to have a significant increase in ScvO2 up to an average of 68% in response to HP infusion after 30—60 minutes; in 14 out of them ScvO2 exceeded 70%. By hour 6, ScvO2 stabilized at its goal level in 23 (79% examinees. Administration of HS caused a significantly increased diuresis. In patients with recovered renal function, the observed hypernatremia, hyperchloremia with hyperchloremic acidosis were transient.Conclusion. The results of the study show it possible to include small-volume hypertonic infusion at

  14. The Effects of Observation of Learn Units during Reinforcement and Correction Conditions on the Rate of Learning Math Algorithms by Fifth Grade Students

    Science.gov (United States)

    Neu, Jessica Adele

    2013-01-01

    I conducted two studies on the comparative effects of the observation of learn units during (a) reinforcement or (b) correction conditions on the acquisition of math objectives. The dependent variables were the within-session cumulative numbers of correct responses emitted during observational sessions. The independent variables were the…

  15. On one-loop corrections to matching conditions of Lattice HQET including 1/m_b terms

    CERN Document Server

    Korcyl, Piotr

    2013-01-01

    HQET is an effective theory for QCD with N_f light quarks and a massive valence quark if the mass of the latter is much bigger than Lambda_QCD. As any effective theory, HQET is predictive only when a set of parameters has been determined through a process called matching. The non-perturbative matching procedure including 1/m_b terms, developped by the ALPHA collaboration, consists of 19 carefully chosen observables which are precisely computable in lattice QCD as well as in lattice HQET. The matching conditions are then a set of 19 equations which relate the QCD and HQET values of these observables. We present a study of one-loop corrections to two generic matching observables involving correlation function with an insertion of the A_0 operator. Our results enable us to quantify the quality of the relevant observables in view of the envisaged non-perturbative implementation of this matching procedure.

  16. Correctness Condition Graphs.

    Science.gov (United States)

    constructors. The goal is to give the programmer deeper insight into the semantics of his program, thereby facilitating his (possibly interactive) formulation of the assertions needed to carry out its verification.

  17. Finite element and analytical solutions for van der Pauw and four-point probe correction factors when multiple non-ideal measurement conditions coexist.

    Science.gov (United States)

    Reveil, Mardochee; Sorg, Victoria C; Cheng, Emily R; Ezzyat, Taha; Clancy, Paulette; Thompson, Michael O

    2017-09-01

    This paper presents an extensive collection of calculated correction factors that account for the combined effects of a wide range of non-ideal conditions often encountered in realistic four-point probe and van der Pauw experiments. In this context, "non-ideal conditions" refer to conditions that deviate from the assumptions on sample and probe characteristics made in the development of these two techniques. We examine the combined effects of contact size and sample thickness on van der Pauw measurements. In the four-point probe configuration, we examine the combined effects of varying the sample's lateral dimensions, probe placement, and sample thickness. We derive an analytical expression to calculate correction factors that account, simultaneously, for finite sample size and asymmetric probe placement in four-point probe experiments. We provide experimental validation of the analytical solution via four-point probe measurements on a thin film rectangular sample with arbitrary probe placement. The finite sample size effect is very significant in four-point probe measurements (especially for a narrow sample) and asymmetric probe placement only worsens such effects. The contribution of conduction in multilayer samples is also studied and found to be substantial; hence, we provide a map of the necessary correction factors. This library of correction factors will enable the design of resistivity measurements with improved accuracy and reproducibility over a wide range of experimental conditions.

  18. Finite element and analytical solutions for van der Pauw and four-point probe correction factors when multiple non-ideal measurement conditions coexist

    Science.gov (United States)

    Reveil, Mardochee; Sorg, Victoria C.; Cheng, Emily R.; Ezzyat, Taha; Clancy, Paulette; Thompson, Michael O.

    2017-09-01

    This paper presents an extensive collection of calculated correction factors that account for the combined effects of a wide range of non-ideal conditions often encountered in realistic four-point probe and van der Pauw experiments. In this context, "non-ideal conditions" refer to conditions that deviate from the assumptions on sample and probe characteristics made in the development of these two techniques. We examine the combined effects of contact size and sample thickness on van der Pauw measurements. In the four-point probe configuration, we examine the combined effects of varying the sample's lateral dimensions, probe placement, and sample thickness. We derive an analytical expression to calculate correction factors that account, simultaneously, for finite sample size and asymmetric probe placement in four-point probe experiments. We provide experimental validation of the analytical solution via four-point probe measurements on a thin film rectangular sample with arbitrary probe placement. The finite sample size effect is very significant in four-point probe measurements (especially for a narrow sample) and asymmetric probe placement only worsens such effects. The contribution of conduction in multilayer samples is also studied and found to be substantial; hence, we provide a map of the necessary correction factors. This library of correction factors will enable the design of resistivity measurements with improved accuracy and reproducibility over a wide range of experimental conditions.

  19. Purification of correctly oxidized MHC class I heavy-chain molecules under denaturing conditions: a novel strategy exploiting disulfide assisted protein folding

    DEFF Research Database (Denmark)

    Ferré, Henrik; Ruffet, Emmanuel; Blicher, Thomas

    2003-01-01

    with correct disulfide bonding are formed under non-reducing denaturing conditions and separated from scrambled disulfide bond forms by hydrophobic interaction chromatography. In the second step, rapid refolding of the oxidized heavy chains is afforded by disulfide bond-assisted folding in the presence of beta...

  20. "It's doom alone that counts": can international human rights law be an effective source of rights in correctional conditions litigation?

    Science.gov (United States)

    Perlin, Michael L; Dlugacz, Henry A

    2009-01-01

    Over the past three decades, the U.S. judiciary has grown increasingly less receptive to claims by convicted felons as to the conditions of their confinement while in prison. Although courts have not articulated a return to the "hands off" policy of the 1950s, it is clear that it has become significantly more difficult for prisoners to prevail in constitutional correctional litigation. The passage and aggressive implementation of the Prison Litigation Reform Act has been a powerful disincentive to such litigation in many areas of prisoners' rights law. From the perspective of the prisoner, the legal landscape is more hopeful in matters that relate to mental health care and treatment. Here, in spite of a general trend toward more stringent applications of standards of proof and a reluctance to order sweeping, intrusive remedies, some courts have aggressively protected prisoners' rights to be free from "deliberate indifference" to serious medical needs, and to be free from excessive force on the part of prison officials. A mostly hidden undercurrent in some prisoners' rights litigation has been the effort on the part of some plaintiffs' lawyers to look to international human rights doctrines as a potential source of rights, an effort that has met with some modest success. It receives support by the inclination of other courts to turn to international human rights conventions-even in nations where such conventions have not been ratified-as a kind of "best practice" in the area. The recent publication and subsequent ratification (though not, as of yet, by the United States) of the UN Convention on the Rights of Persons with Disabilities (CRPD) may add new support to those using international human rights documents as a basis for litigating prisoners' rights claims. To the best of our knowledge, there has, as of yet, been no scholarly literature on the question of the implications of the CRPD on the state of prisoners' rights law in a U.S. domestic context. In this

  1. A comparative study on preprocessing techniques in diabetic retinopathy retinal images: illumination correction and contrast enhancement.

    Science.gov (United States)

    Rasta, Seyed Hossein; Partovi, Mahsa Eisazadeh; Seyedarabi, Hadi; Javadzadeh, Alireza

    2015-01-01

    To investigate the effect of preprocessing techniques including contrast enhancement and illumination correction on retinal image quality, a comparative study was carried out. We studied and implemented a few illumination correction and contrast enhancement techniques on color retinal images to find out the best technique for optimum image enhancement. To compare and choose the best illumination correction technique we analyzed the corrected red and green components of color retinal images statistically and visually. The two contrast enhancement techniques were analyzed using a vessel segmentation algorithm by calculating the sensitivity and specificity. The statistical evaluation of the illumination correction techniques were carried out by calculating the coefficients of variation. The dividing method using the median filter to estimate background illumination showed the lowest Coefficients of variations in the red component. The quotient and homomorphic filtering methods after the dividing method presented good results based on their low Coefficients of variations. The contrast limited adaptive histogram equalization increased the sensitivity of the vessel segmentation algorithm up to 5% in the same amount of accuracy. The contrast limited adaptive histogram equalization technique has a higher sensitivity than the polynomial transformation operator as a contrast enhancement technique for vessel segmentation. Three techniques including the dividing method using the median filter to estimate background, quotient based and homomorphic filtering were found as the effective illumination correction techniques based on a statistical evaluation. Applying the local contrast enhancement technique, such as CLAHE, for fundus images presented good potentials in enhancing the vasculature segmentation.

  2. Method for Correction of Consequences of Radiation-Induced Heart Disease using Low-Intensity Electromagnetic Emission under Experimental Conditions.

    Science.gov (United States)

    Bavrina, A P; Monich, V A; Malinovskaya, S L; Yakovleva, E I; Bugrova, M L; Lazukin, V F

    2015-05-01

    Effects of successive exposure to ionizing irradiation and low-intensity broadband red light on electrical activity of the heart and myocardium microstructure were studied in rats. Lowintensity red light corrected some ECG parameters, in particular, it normalized QT and QTc intervals and voltage of R and T waves. Changes in ECG parameters were followed by alterations in microstructure of muscle fi laments in the myocardium of treatment group animals comparing to control group.

  3. Predicting the Sabine absorption coefficients of fibrous absorbers for various air backing conditions with a frequency-dependent diffuseness correction

    DEFF Research Database (Denmark)

    Jeong, Cheol-Ho

    2016-01-01

    characteristics of their own configurations. This study aims to predict the absorption coefficient for various mounting conditions from a single measurement of an arbitrary mounting condition by extracting the air flow resistivity of the test specimen and the frequency-dependent effect of the chamber......Fibrous absorbers can be installed with various air backing conditions to fulfil a given low frequency acoustic requirement. Since absorber manufacturers cannot provide the absorption coefficients for all possible mounting conditions, acousticians have difficulties knowing the absorption...

  4. Non-reference condition correction factor kNR of typical radiation detectors applied for the dosimetry of high-energy photon fields in radiotherapy.

    Science.gov (United States)

    Chofor, Ndimofor; Harder, Dietrich; Poppe, Björn

    2012-09-01

    According to accepted dosimetry protocols, the "radiation quality correction factor"k(Q) accounts for the energy-dependent changes of detector responses under the conditions of clinical dosimetry for high-energy photon radiations. More precisely, a factor k(QR) is valid under reference conditions, i.e. at a point on the beam axis at depth 10 cm in a large water phantom, for 10×10 cm(2) field size, SSD 100 cm and the given radiation quality with quality index Q. Therefore, a further correction factor k(NR) has been introduced to correct for the influences of spectral quality changes when detectors are used under non-reference conditions such as other depths, field sizes and off-axis distances, while under reference conditions k(NR) is normalized to unity. In this paper, values of k(NR) are calculated for 6 and 15 MV photon beams, using published data of the energy-dependent responses of various radiation detectors to monoenergetic photon radiations, and weighting these responses with validated photon spectra of clinical high-energy photon beams from own Monte-Carlo-calculations for a wide variation of the non-reference conditions within a large water phantom. Our results confirm the observation by Scarboro et al. [26] that k(NR) can be represented by a unique function of the mean energy Em, weighted by the spectral photon fluence. Accordingly, the numerical variations of Em with depth, field size and off-axis distance have been provided. Throughout all considered conditions, the deviations of the k(NR) values from unity are at most 2% for a Farmer type ion chamber, and they remain below 15% for the thermoluminescent detectors LiF:Mg,Ti and LiF:Mg,Cu,P. For the shielded diode EDP-10, k(NR) varies from unity up to 20%, while the unshielded diode EDD-5 shows deviations up to 60% in the peripheral region. Thereby, the restricted application field of unshielded diodes has been clarified. For small field dosimetry purposes k(NR) can be converted into k(NCSF), the non

  5. Non-reference condition correction factor k{sub NR} of typical radiation detectors applied for the dosimetry of high-energy photon fields in radiotherapy

    Energy Technology Data Exchange (ETDEWEB)

    Chofor, Ndimofor; Poppe, Bjoern [Oldenburg Univ. (Germany). Working Group Medical Radiation Physics; Pius Hospital, Oldenburg (Germany). Clinic of Radiotherapy and Oncology; Harder, Dietrich

    2012-11-01

    According to accepted dosimetry protocols, the 'radiation quality correction factor' k{sub Q} accounts for the energy-dependent changes of detector responses under the conditions of clinical dosimetry for high-energy photon radiations. More precisely, a factor k{sub QR} is valid under reference conditions, i.e. at a point on the beam axis at depth 10 cm in a large water phantom, for 10 x 10 cm{sup 2} field size, SSD 100 cm and the given radiation quality with quality index Q. Therefore, a further correction factor k{sub NR} has been introduced to correct for the influences of spectral quality changes when detectors are used under non-reference conditions such as other depths, field sizes and off-axis distances, while under reference conditions k{sub NR} is normalized to unity. In this paper, values of k{sub NR} are calculated for 6 and 15 MV photon beams, using published data of the energy-dependent responses of various radiation detectors to monoenergetic photon radiations, and weighting these responses with validated photon spectra of clinical high-energy photon beams from own Monte-Carlo-calculations for a wide variation of the non-reference conditions within a large water phantom. Our results confirm the observation by Scarboro et al. [26] that k{sub NR} can be represented by a unique function of the mean energy Em, weighted by the spectral photon fluence. Accordingly, the numerical variations of Em with depth, field size and off-axis distance have been provided. Throughout all considered conditions, the deviations of the k{sub NR} values from unity are at most 2% for a Farmer type ion chamber, and they remain below 15% for the thermoluminescent detectors LiF:Mg,Ti and LiF:Mg,Cu,P. For the shielded diode EDP-10, k{sub NR} varies from unity up to 20%, while the unshielded diode EDD-5 shows deviations up to 60% in the peripheral region. Thereby, the restricted application field of unshielded diodes has been clarified. For small field dosimetry purposes

  6. A Correction of Random Incidence Absorption Coefficients for the Angular Distribution of Acoustic Energy under Measurement Conditions

    DEFF Research Database (Denmark)

    Jeong, Cheol-Ho

    2009-01-01

    discrepancies between the measured value and the theoretical random incidence absorption coefficient. Therefore the angular distribution of the incident acoustic energy onto an absorber sample should be taken into account. The angular distribution of the incident energy density was simulated using the beam...... tracing method for various room shapes and source positions. The averaged angular distribution is found to be similar to a Gaussian distribution. As a result, an angle-weighted absorption coefficient was proposed by considering the angular energy distribution to improve the agreement between...... the theoretical absorption coefficient and the reverberation room measurement. The angle-weighted absorption coefficient, together with the size correction, agrees satisfactorily with the measured absorption data by the reverberation chamber method. At high frequencies and for large samples, the averaged...

  7. Efficiency enhancement of CIGS compound solar cell fabricated using homomorphic thin Cr{sub 2}O{sub 3} diffusion barrier formed on stainless steel substrate

    Energy Technology Data Exchange (ETDEWEB)

    Sim, Jae-Kwan; Lee, Seung-Kyu; Kim, Jin-Soo; Jeong, Kwang-Un; Ahn, Haeng-Keun; Lee, Cheul-Ro, E-mail: crlee7@jbnu.ac.kr

    2016-12-15

    Highlights: • A chromium oxide layer is formed as diffusion barrier by thermal oxidation process on STS substrate. • A Cr{sub 2}O{sub 3} layer effectively reduces impurities diffusion into the CIGS absorber layer. • The Cr{sub 2}O{sub 3} layer plays an important role in increasing the efficiency by reduction of impurity diffusion. - Abstract: It is known that the efficiency of flexible Cu(In,Ga)Se{sub 2} (CIGS) solar cells fabricated on stainless-steel (STS) substrates deteriorates due to iron (Fe) and Cr impurities diffusing into the CIGS absorber layer. To overcome this problem, a nanoscale homomorphic chromium oxide layer was formed as a diffusion barrier by thermal oxidation on the surface of STS substrates for 1 min at 600 °C in oxygen atmosphere. By TEM and grazing-incidence X-ray diffraction (GIXRD), it was confirmed that the formed oxide layer on surface of STS substrates was a Cr{sub 2}O{sub 3} layer. It was found that the formed homomorphic Cr{sub 2}O{sub 3} thin layer of about 15 nm thickness was an effective diffusion barrier to reduce impurity diffusion into the CIGS layer by secondary ion mass spectroscopy (SIMS). In contrast to the efficiency of CIGS solar cell without homomorphic Cr{sub 2}O{sub 3} diffusion layer is 8.6%, whereas with diffusion barrier it increases to 10.6% because of impurities such as Fe and Cr from the STS substrate into the CIGS layer. It reveals that the layer formed on the surface of STS substrate by thermal oxidation process plays an important role in increasing the performance of CIGS solar cells.

  8. Effectiveness of the pilot program correction psychophysical condition of children in the second year of a common educational school

    Directory of Open Access Journals (Sweden)

    O. A. Klyus

    2014-03-01

    Full Text Available Purpose: the algorithms have been defined and grounded that contain projecting operations for the formation and implementation of a programme aiming at the correction of psychophysical state of children in the process of physical education during the second year of studying at school. In the investigated was attended by 19 girls and 15 boys second class of experimental group and 30 girls and 30 boys in the control group. Results: it is shown that the increase in body weight of 2.4% in girls and 3.9% boys, increase in body length 14.7% of girls and 11.5% boys, vital capacity of the lungs 22% and 21.8%, respectively, m the muscle strength by dynamometry results brushes right and left hands grew by 142.4 and 94.8%, revealed a significant (from p <0.05 to p <0.001 improved values of all investigated parameters of physical fitness girls and boys. Conclusions: use within one year of the proposed development of 19 girls and 15 boys achieved the much better results in solving tasks than the traditional organization and content of physical education, which are used in the control group

  9. Nonlinear Correction to the Euler Buckling Formula for Compressed Cylinders with Guided-Guided End Conditions

    KAUST Repository

    De Pascalis, Riccardo

    2010-07-22

    Euler\\'s celebrated buckling formula gives the critical load N for the buckling of a slender cylindrical column with radius B and length L as N/(π3B2)=(E/4)(B/L)2 where E is Young\\'s modulus. Its derivation relies on the assumptions that linear elasticity applies to this problem, and that the slenderness (B/L) is an infinitesimal quantity. Here we ask the following question: What is the first non-linear correction in the right hand-side of this equation when terms up to (B/L)4 are kept? To answer this question, we specialize the exact solution of incremental non-linear elasticity for the homogeneous compression of a thick compressible cylinder with lubricated ends to the theory of third-order elasticity. In particular, we highlight the way second- and third-order constants-including Poisson\\'s ratio-all appear in the coefficient of (B/L)4. © 2010 Springer Science+Business Media B.V.

  10. An evidence-based approach to the creation of normative data: base rates of impaired scores within a brief neuropsychological battery argue for age corrections, but against corrections for medical conditions.

    Science.gov (United States)

    O'Connell, Megan E; Tuokko, Holly; Voll, Stacey; Simard, Martine; Griffith, Lauren E; Taler, Vanessa; Wolfson, Christina; Kirkland, Susan; Raina, Parminder

    We detail a new approach to the creation of normative data for neuropsychological tests. The traditional approach to normative data creation is to make demographic adjustments based on observations of correlations between single neuropsychological tests and selected demographic variables. We argue, however, that this does not describe the implications for clinical practice, such as increased likelihood of misclassification of cognitive impairment, nor does it elucidate the impact on decision-making with a neuropsychological battery. We propose base rate analyses; specifically, differential base rates of impaired scores between theoretical and actual base rates as the basis for decisions to create demographic adjustments within normative data. Differential base rates empirically describe the potential clinical implications of failing to create an appropriate normative group. We demonstrate this approach with data from a short telephone-administered neuropsychological battery given to a large, neurologically healthy sample aged 45-85 years old. We explored whether adjustments for age and medical conditions were warranted based on differential base rates of spuriously impaired scores. Theoretical base rates underestimated the frequency of impaired scores in older adults and overestimated the frequency of impaired scores in younger adults, providing an evidence base for the creation of age-corrected normative data. In contrast, the number of medical conditions (numerous cardiovascular, hormonal, and metabolic conditions) was not related to differential base rates of impaired scores. Despite a small correlation between number of medical conditions and each neuropsychological variable, normative adjustments for number of medical conditions does not appear warranted. Implications for creation of normative data are discussed.

  11. Background correction in forensic photography. II. Photography of blood under conditions of non-uniform illumination or variable substrate color--practical aspects and limitations.

    Science.gov (United States)

    Wagner, John H; Miskelly, Gordon M

    2003-05-01

    The combination of photographs taken at wavelengths at and bracketing the peak of a narrow absorbance band can lead to enhanced visualization of the substance causing the narrow absorbance band. This concept can be used to detect putative bloodstains by division of a linear photographic image taken at or near 415 nm with an image obtained by averaging linear photographs taken at or near 395 and 435 nm. Nonlinear images can also be background corrected by substituting subtraction for the division. This paper details experimental applications and limitations of this technique, including wavelength selection of the illuminant and at the camera. Characterization of a digital camera to be used in such a study is also detailed. Detection limits for blood using the three wavelength correction method under optimum conditions have been determined to be as low as 1 in 900 dilution, although on strongly patterned substrates blood diluted more than twenty-fold is difficult to detect. Use of only the 435 nm photograph to estimate the background in the 415 nm image lead to a twofold improvement in detection limit on unpatterned substrates compared with the three wavelength method with the particular camera and lighting system used, but it gave poorer background correction on patterned substrates.

  12. An improved simulation of the 2015 El Niño event by optimally correcting the initial conditions and model parameters in an intermediate coupled model

    Science.gov (United States)

    Zhang, Rong-Hua; Tao, Ling-Jiang; Gao, Chuan

    2017-09-01

    Large uncertainties exist in real-time predictions of the 2015 El Niño event, which have systematic intensity biases that are strongly model-dependent. It is critically important to characterize those model biases so they can be reduced appropriately. In this study, the conditional nonlinear optimal perturbation (CNOP)-based approach was applied to an intermediate coupled model (ICM) equipped with a four-dimensional variational data assimilation technique. The CNOP-based approach was used to quantify prediction errors that can be attributed to initial conditions (ICs) and model parameters (MPs). Two key MPs were considered in the ICM: one represents the intensity of the thermocline effect, and the other represents the relative coupling intensity between the ocean and atmosphere. Two experiments were performed to illustrate the effects of error corrections, one with a standard simulation and another with an optimized simulation in which errors in the ICs and MPs derived from the CNOP-based approach were optimally corrected. The results indicate that simulations of the 2015 El Niño event can be effectively improved by using CNOP-derived error correcting. In particular, the El Niño intensity in late 2015 was adequately captured when simulations were started from early 2015. Quantitatively, the Niño3.4 SST index simulated in Dec. 2015 increased to 2.8 °C in the optimized simulation, compared with only 1.5 °C in the standard simulation. The feasibility and effectiveness of using the CNOP-based technique to improve ENSO simulations are demonstrated in the context of the 2015 El Niño event. The limitations and further applications are also discussed.

  13. SU-E-T-126: Non-Reference Condition Correction Factor KNR of Typical Radiation Detectors for the Dosimetry of High-Energy Photons.

    Science.gov (United States)

    Chofor, N; Poppe, B; Harder, D

    2012-06-01

    To correct for the deviations of the detector response when typical radiation detectors are used under non-reference conditions, factor kNR was calculated from the known energy dependence of the detector response at photon energies from 10 keV upwards and from clinical photon spectra within a large water phantom beneath a Siemens Primus 6/15 MV linac. A Farmer type ion chamber (NE2571), two TLD detector types and two diodes were investigated. Factor kNR was obtained as the ratio of the weighted responses Yt of a given detector t under reference conditions xref (axial distance r = 0 cm, depth d = 10 cm, field size 10 × 10 cm2 and SSD = 100 cm) and that under non-reference conditions × (off-axis points and depths for various field sizes); kNR = Yt(xref)/Yt(x). For small field (SF) dosimetry, we evaluated correction factor kNRSF, which refers to small field reference conditions (4 × 4 cm2 field). For all detectors investigated, the deviations of kNR from unity were highest outside the field, due to prevailing low-energy scatter contributions. For the Farmer chamber and EDP-10 diode, the kNR deviations did not exceed 2%, but were up to 60% for the EDD-5 diode, while kNR values for LiF:Mg,Cu,P and LiF:Mg,Ti deviated at most 15% and 5% respectively. kNR values appear as unique functions of the mean photon energy at the point of interest. Air-filled ion chambers show only small kNR variations, while for non-water equivalent detectors, kNR variations depend on the detector response at low photon energy. kNR can be presented as a unique function of the mean photon energy at the point of interest. A 4 × 4 cm2 reference field is recommended for small fields, with correction factor kNRSF varying almost negligibly from kNR except for unshielded Si diodes. © 2012 American Association of Physicists in Medicine.

  14. conditions

    Directory of Open Access Journals (Sweden)

    M. Venkatesulu

    1996-01-01

    Full Text Available Solutions of initial value problems associated with a pair of ordinary differential systems (L1,L2 defined on two adjacent intervals I1 and I2 and satisfying certain interface-spatial conditions at the common end (interface point are studied.

  15. Teaching in Correctional Settings

    Science.gov (United States)

    de Koning, Mireille; Striedinger, Angelika

    2009-01-01

    In early 2009, Education International conducted a study amongst its member organisations on education in correctional settings in their respective countries. Findings reveal that education in correctional settings and the conditions of teachers working in them vary greatly between regions. Generally speaking, in most regions, but specifically in…

  16. Atmospheric Corrections and Multi-Conditional Algorithm for Multi-Sensor Remote Sensing of Suspended Particulate Matter in Low-to-High Turbidity Levels Coastal Waters

    Directory of Open Access Journals (Sweden)

    Stéfani Novoa

    2017-01-01

    Full Text Available The accurate measurement of suspended particulate matter (SPM concentrations in coastal waters is of crucial importance for ecosystem studies, sediment transport monitoring, and assessment of anthropogenic impacts in the coastal ocean. Ocean color remote sensing is an efficient tool to monitor SPM spatio-temporal variability in coastal waters. However, near-shore satellite images are complex to correct for atmospheric effects due to the proximity of land and to the high level of reflectance caused by high SPM concentrations in the visible and near-infrared spectral regions. The water reflectance signal (ρw tends to saturate at short visible wavelengths when the SPM concentration increases. Using a comprehensive dataset of high-resolution satellite imagery and in situ SPM and water reflectance data, this study presents (i an assessment of existing atmospheric correction (AC algorithms developed for turbid coastal waters; and (ii a switching method that automatically selects the most sensitive SPM vs. ρw relationship, to avoid saturation effects when computing the SPM concentration. The approach is applied to satellite data acquired by three medium-high spatial resolution sensors (Landsat-8/Operational Land Imager, National Polar-Orbiting Partnership/Visible Infrared Imaging Radiometer Suite and Aqua/Moderate Resolution Imaging Spectrometer to map the SPM concentration in some of the most turbid areas of the European coastal ocean, namely the Gironde and Loire estuaries as well as Bourgneuf Bay on the French Atlantic coast. For all three sensors, AC methods based on the use of short-wave infrared (SWIR spectral bands were tested, and the consistency of the retrieved water reflectance was examined along transects from low- to high-turbidity waters. For OLI data, we also compared a SWIR-based AC (ACOLITE with a method based on multi-temporal analyses of atmospheric constituents (MACCS. For the selected scenes, the ACOLITE-MACCS difference was

  17. Correct Models

    OpenAIRE

    Blacher, René

    2010-01-01

    Ce rapport complete les deux rapports précédents et apporte une explication plus simple aux résultats précédents : à savoir la preuve que les suites obtenues sont aléatoires.; In previous reports, we have show how to transform a text $y_n$ in a random sequence by using functions of Fibonacci $T_q$. Now, in this report, we obtain a clearer result by proving that $T_q(y_n)$ has the IID model as correct model. But, it is necessary to define correctly a correct model. Then, we study also this pro...

  18. A Novel Hypergraph-Based Genetic Algorithm (HGGA) Built on Unimodular and Anti-homomorphism Properties for DNA Sequencing by Hybridization.

    Science.gov (United States)

    Swaminathan, V; Rajaram, Gangothri; Abhishek, V; Reddy, Boosi Shashank; Kannan, K

    2017-11-06

    The sequencing by hybridization (SBH) of determining the order in which nucleotides should occur on a DNA string is still under discussion for enhancements on computational intelligence although the next generation of DNA sequencing has come into existence. In the last decade, many works related to graph theory-based DNA sequencing have been carried out in the literature. This paper proposes a method for SBH by integrating hypergraph with genetic algorithm (HGGA) for designing a novel analytic technique to obtain DNA sequence from its spectrum. The paper represents elements of the spectrum and its relation as hypergraph and applies the unimodular property to ensure the compatibility of relations between l-mers. The hypergraph representation and unimodular property are bound with the genetic algorithm that has been customized with a novel selection and crossover operator reducing the computational complexity with accelerated convergence. Subsequently, upon determining the primary strand, an anti-homomorphism is invoked to find the reverse complement of the sequence. The proposed algorithm is implemented in the GenBank BioServer datasets, and the results are found to prove the efficiency of the algorithm. The HGGA is a non-classical algorithm with significant advantages and computationally attractive complexity reductions ranging to [Formula: see text] with improved accuracy that makes it prominent for applications other than DNA sequencing like image processing, task scheduling and big data processing.

  19. Noise-Compensated, Bias-Corrected Diffusion Weighted Endorectal Magnetic Resonance Imaging via a Stochastically Fully-Connected Joint Conditional Random Field Model

    CERN Document Server

    Boroomand, Ameneh; Khalvati, Farzad; Haider, Masoom A; Wong, Alexander

    2015-01-01

    Diffusion weighted magnetic resonance imaging (DW-MRI) is a powerful tool in imaging-based prostate cancer (PCa) screening and detection. Endorectal coils are commonly used in DW-MRI to improve the signal-to-noise ratio (SNR) of the acquisition, at the expense of significant intensity inhomogeneities (bias field) that worsens as we move away from the endorectal coil. The presence of bias field can have a significant negative impact on the accuracy of different image analysis tasks, as well as the accuracy of PCa tumor localization, thus leading to increased inter- and intra-observer variability. The previously proposed bias field correction methods often suffer from undesired noise amplification that can reduce the image quality of the resulting bias-corrected DW-MRI data. Here, we propose a unified data reconstruction approach that enables joint compensation of bias field as well as data noise in diffusion weighted endorectal magnetic resonance (DW-EMR) imaging. The proposed noise-compensated, bias-corrected...

  20. Publisher Correction

    DEFF Research Database (Denmark)

    Flachsbart, Friederike; Dose, Janina; Gentschew, Liljana

    2018-01-01

    The original version of this Article contained an error in the spelling of the author Robert Häsler, which was incorrectly given as Robert Häesler. This has now been corrected in both the PDF and HTML versions of the Article....

  1. Correction: Electrochemical Investigation of the Corrosion of Different Microstructural Phases of X65 Pipeline Steel under Saturated Carbon Dioxide Conditions. Materials 2015, 8, 2635–2649

    Directory of Open Access Journals (Sweden)

    Yuanfeng Yang

    2015-12-01

    Full Text Available In the published manuscript “Electrochemical Investigation of the Corrosion of Different Microstructural Phases of X65 Pipeline Steel under Saturated Carbon Dioxide Conditions. [...

  2. Telecanthus and hypertelorism in frontoethmoidal meningoencephaloceles and the surgical correction of these conditions: Part I. An orbital anthropomorphometric evaluation of the Khmer subpopulation of Cambodia.

    Science.gov (United States)

    Pinzer, Thomas; Gollogly, Jim; Krishnan, Kartik G; Schackert, Gabriele; Lauer, Günter

    2008-01-01

    This is the first of the two parts of a paper concerning a novel method on the surgical treatment of orbital dysmorphisms, especially telecanthus (TC) and hypertelorism (HT). The normal orbital values of a given ethnic group is an essential factor in determining the degree of correction intended in that patient population. We did not find any data related to the normal orbital values in Khmer-Cambodians in whom we performed the corrective surgeries. Thus, the aims of this article are to evaluate the orbital morphometric data procured in Khmer-Cambodians and to analyze the contradictory definitions of TC and HT found in the literature. We measured the inner canthal distance, outer canthal distance, and interpupillary distance in 688 Khmer-Cambodians. The measured normal values are presented and compared with other Asian populations. We discovered that the Khmer-Cambodian orbital morphometry did not resemble the general conception of an Asian appearance, but rather showed a similarity to values found in Indians. Telecanthus and hypertelorism are frequent orbital dysmorphisms that, however, find conflicting definitions in the literature. By means of a short literature review, we have attempted to reorganize the multiplicity of definitions in orbital measurements, as well as clarify the confusing terminology used in TC and HT.

  3. Telecanthus and hypertelorism in frontoethmoidal meningoencephaloceles and the surgical correction of these conditions: Part II. A novel surgical approach in the treatment of telecanthus.

    Science.gov (United States)

    Pinzer, Thomas; Gollogly, Jim; Krishnan, Kartik G; Schackert, Gabriele; Lauer, Günter

    2008-01-01

    Frontoethmoidal meningoencephaloceles (MEC) are frequently associated with telecanthus (TC) and seldom with hypertelorism (HT). The correction of these orbital dysmorphisms are undertaken in the same setting as the surgical treatment of MEC. During several charity missions to Phnom Penh, Cambodia, the authors developed a simple surgical technique for the correction of TC that has not been described before. The results of this technique was evaluated as follows: in 58 patients, who underwent surgical treatment of MEC, the pre and postoperative inner canthal (ICD) and outer canthal distances (OCD) were measured; the interpupillary distance (IPD) was measured in 50 patients. Forty five (78%) out of the 58 patients showed a telecanthus before surgery; 39 (87%) of these 45 showed normal values after surgery, in the rest 6 (13%) the ICD could be decreased after surgery, however the values did not reach a normal range.A HT (including TC) was found in 10 patients presenting with MEC (17%) before surgery. Five (50%) of these patients did not show a HT in post surgical follow-up. In 3 (30%) of the remaining 5 patients showing persistent HT, the ICD alone could be decreased to a normal value (no TC), whereas in 2 (20%) others a TC was unchanged. Three patients with MEC had shown normal preoperative orbital morphometry. The mean follow-up was 9 months (range: 5-16 months). The reader is further referred to our previous paper for interpreting the orbital measurement values in Khmer Cambodians as pertinent to TC or HT.

  4. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... out more. Corrective Jaw Surgery Corrective Jaw Surgery Orthognathic surgery is performed to correct the misalignment of jaws ... out more. Corrective Jaw Surgery Corrective Jaw Surgery Orthognathic surgery is performed to correct the misalignment of jaws ...

  5. Correction note.

    Science.gov (United States)

    2014-12-01

    Correction note for Sanders, M., Calam, R., Durand, M., Liversidge, T. and Carmont, S. A. (2008), Does self-directed and web-based support for parents enhance the effects of viewing a reality television series based on the Triple P - Positive Parenting Programme?. Journal of Child Psychology and Psychiatry, 49: 924-932. doi: 10.1111/j.1469-7610.2008.01901.x. © 2014 Association for Child and Adolescent Mental Health.

  6. [Biological adaptation of children of preschool age with retardation of mental development (RMD) in conditions of pre-school correctional educational institutions].

    Science.gov (United States)

    Bannikova, L P; Sebirzyanov, M D

    2013-01-01

    The present study was devoted to the investigation of biological adaptation of children aged 6-7 years with retardation of mental development (RMD) in pre-school correctional educational institutions. Under supervision there were 69 children, out of them 34 RMD cases and 35 children in whom mental development corresponds to age-control group--35 persons. The increase in sympatico-adrenergic effects and centralized heart rhythm control was revealed in children of both groups under comparison, but in RMD cases these effects were more pronounced. Adaptation reserves in RMD children appeared to be lower than in children in whom mental development corresponds to the age. Gender differences of adaptive reserves in children have been established

  7. Influence of dental correction on nociceptive test responses, fecal appearance, body condition score, and apparent digestibility coefficient for dry matter of Zamorano-leones donkeys (Equus asinus).

    Science.gov (United States)

    Rodrigues, J B; Ferreira, L M; Bastos, E; San Roman, F; Viegas, C; Santos, A S

    2013-10-01

    The influence of dental correction on nociceptive (pressure) test responses, fecal appearance, BCS, and apparent digestibility coefficient for DM was studied in 18 Zamorano-Leonés donkeys, an endangered local breed from the Zamora province in Spain. For this purpose, donkeys were divided into 2 homogeneous control and treatment groups, based on age, BCS, and dental findings. On d 1, 45, 90, and 135, BCS and nociceptive test responses were evaluated in all donkeys. Feed and fecal samples were collected from all donkeys for 3 consecutive days, starting at each of the aforementioned days. Apparent digestibility coefficient for DM was estimated, using ADL as an internal marker. A progressive decrease of positive nociceptive test responses was observed from d 1 up to 90 (P < 0.01) in the treatment group. No difference between groups was observed for BCS. However, BCS at d 90 was greater (P = 0.018) than observed on d 1 or 45, indicating a time influence. Concerning apparent digestibility coefficient for DM, there were differences among collection days in apparent digestibility coefficient for DM (P < 0.05). No differences in fecal appearance were observed between treatments or collection days. This study highlighted the importance of regular dental care for not only Zamorano-Leonés donkeys but also the equid population, in general, to improve their welfare.

  8. Catch-up saccades in head-unrestrained conditions reveal that saccade amplitude is corrected using an internal model of target movement

    Science.gov (United States)

    Daye, Pierre M.; Blohm, Gunnar; Lefèvre, Phillippe

    2014-01-01

    This study analyzes how human participants combine saccadic and pursuit gaze movements when they track an oscillating target moving along a randomly oriented straight line with the head free to move. We found that to track the moving target appropriately, participants triggered more saccades with increasing target oscillation frequency to compensate for imperfect tracking gains. Our sinusoidal paradigm allowed us to show that saccade amplitude was better correlated with internal estimates of position and velocity error at saccade onset than with those parameters 100 ms before saccade onset as head-restrained studies have shown. An analysis of saccadic onset time revealed that most of the saccades were triggered when the target was accelerating. Finally, we found that most saccades were triggered when small position errors were combined with large velocity errors at saccade onset. This could explain why saccade amplitude was better correlated with velocity error than with position error. Therefore, our results indicate that the triggering mechanism of head-unrestrained catch-up saccades combines position and velocity error at saccade onset to program and correct saccade amplitude rather than using sensory information 100 ms before saccade onset. PMID:24424378

  9. Catch-up saccades in head-unrestrained conditions reveal that saccade amplitude is corrected using an internal model of target movement.

    Science.gov (United States)

    Daye, Pierre M; Blohm, Gunnar; Lefèvre, Phillippe

    2014-01-14

    This study analyzes how human participants combine saccadic and pursuit gaze movements when they track an oscillating target moving along a randomly oriented straight line with the head free to move. We found that to track the moving target appropriately, participants triggered more saccades with increasing target oscillation frequency to compensate for imperfect tracking gains. Our sinusoidal paradigm allowed us to show that saccade amplitude was better correlated with internal estimates of position and velocity error at saccade onset than with those parameters 100 ms before saccade onset as head-restrained studies have shown. An analysis of saccadic onset time revealed that most of the saccades were triggered when the target was accelerating. Finally, we found that most saccades were triggered when small position errors were combined with large velocity errors at saccade onset. This could explain why saccade amplitude was better correlated with velocity error than with position error. Therefore, our results indicate that the triggering mechanism of head-unrestrained catch-up saccades combines position and velocity error at saccade onset to program and correct saccade amplitude rather than using sensory information 100 ms before saccade onset.

  10. Correction of aggregative thrombocytes activity in patients with unstable angina by THz irradiation of nitrogen oxide occurrence at in vitro conditions

    Directory of Open Access Journals (Sweden)

    Vyacheslav F. Kirichuk

    2013-11-01

    Full Text Available There had been shown a normalizing effect of THz radiation of MEAS (molecular emission and absorption spectrum of 400 GHz nitrogen oxide occurrence on aggregation parameters of thrombocytes in patients with unstable angina at in vitro conditions. 180 patients with an unstable angina had been involved in to the research.

  11. Purification of correctly oxidized MHC class I heavy-chain molecules under denaturing conditions: A novel strategy exploiting disulfide assisted protein folding

    DEFF Research Database (Denmark)

    Ferré, Henrik; Ruffet, E.; Blicher, T.

    2003-01-01

    disulfide bonding are formed under non-reducing denaturing conditions and separated from scrambled disulfide bond forms by hydrophobic interaction chromatography. In the second step, rapid refolding of the oxidized heavy chains is afforded by disulfide bond-assisted folding in the presence of beta(2...

  12. Theoretical derivation of flow laws for quartz dislocation creep: Comparisons with experimental creep data and extrapolation to natural conditions using water fugacity corrections

    Science.gov (United States)

    Fukuda, Jun-ichi; Shimizu, Ichiko

    2017-08-01

    We theoretically derived flow laws for quartz dislocation creep using climb-controlled dislocation creep models and compared them with available laboratory data for quartz plastic deformation. We assumed volume diffusion of oxygen-bearing species along different crystallographic axes (//c, ⊥R, and ⊥c) of α-quartz and β-quartz, and pipe diffusion of H2O, to be the elementary processes of dislocation climb. The relationships between differential stress (σ) and strain rate (ɛ>˙) are written as ɛ>˙∝σ3Dv and ɛ>˙∝σ5Dp for cases controlled by volume and pipe diffusion, respectively, where Dv and Dp are coefficients of diffusion for volume and pipe diffusion. In previous experimental work, there were up to 1.5 orders of magnitude difference in the water fugacity values in experiments that used either gas-pressure-medium or solid-pressure-medium deformation apparatus. Therefore, in both the theories and flow laws, we included water fugacity effects as modified preexponential factors and water fugacity terms. Previous experimental data were obtained mainly in the β-quartz field and are highly consistent with the volume-diffusion-controlled dislocation creep models of β-quartz involving the water fugacity term. The theory also predicts significant effects for the transition of α-β quartz under crustal conditions. Under experimental pressure and temperature conditions, the flow stress of pipe-diffusion-controlled dislocation creep is higher than that for volume-diffusion-controlled creep. Extrapolation of the flow laws to natural conditions indicates that the contributions of pipe diffusion may dominate over volume diffusion under low-temperature conditions of the middle crust around the brittle-plastic transition zone.

  13. The usage of THz radiation of nitrogen oxide occurrence in blood antioxidant characteristics correction and lipid peroxidation process under stress conditions

    OpenAIRE

    Kirichuk, Vyacheslav; Tsymbal, Alexander

    2013-01-01

    There has been studied influence of terahertz waves of molecular and absorption spectrum occurrence of 150.176-150.664 GHz nitrogen oxide on intensity of lipid peroxidation processes and blood antioxidant characteristics in 75 white outbred male-rats of 180-220 g under the immobilization stress condition. The tests were performed with account of lipid peroxidation metabolites – lipid hydroperoxides, malondialdehyde. The states of blood antioxidant activity were peroxide erythrocyte resistance...

  14. Psychological and psycho-vegetative technologies of diagnostics and correction the behavior of professionals working in extreme conditions (state of problem and prospective studies

    Directory of Open Access Journals (Sweden)

    Bulygina V.G.

    2016-10-01

    Full Text Available The article is devoted to promising areas of research regulatory processes (self-control оf the professionals working in special and extreme conditions of professional activity. The actuality of creation a comprehensive compact of the selection methods, adaptation the technologies to professional tasks, methods of psychological assistance of the specialists of hazardous occupations was shown. It was done an overview of foreign studies of the features of psychological regulation and self-control in stressful situations, neurophysiological correlates of self-control and aggressive behavior. The results of trainings of the development of the capacity for self-control, increasing resistance to the negative effects of mental exhaustion, were described. There were expounded the results of domestic investigations of the association between the self-regulation of behavior and profile of reactivity among mentally healthy and ill persons. The necessity of the development of psychodiagnostic and psychological programs for specialists in the professions of risk, aimed to improve the efficiency of regulatory processes for the adaptation to the conditions of professional activity.

  15. Accumulation of fatty acids in Chlorella vulgaris under heterotrophic conditions in relation to activity of acetyl-CoAcarboxylase, temperature, and co-immobilization with Azospirillum brasilense [corrected].

    Science.gov (United States)

    Leyva, Luis A; Bashan, Yoav; Mendoza, Alberto; de-Bashan, Luz E

    2014-10-01

    The relation between fatty acid accumulation, activity of acetyl-CoA carboxylase (ACC), and consequently lipid accumulation was studied in the microalgae Chlorella vulgaris co-immobilized with the plant growth-promoting bacterium Azospirillum brasilense under dark heterotrophic conditions with Na acetate as a carbon source. In C. vulgaris immobilized alone, cultivation experiments for 6 days showed that ACC activity is directly related to fatty acid accumulation, especially in the last 3 days. In co-immobilization experiments, A. brasilense exerted a significant positive effect over ACC activity, increased the quantity in all nine main fatty acids, increased total lipid accumulation in C. vulgaris, and mitigated negative effects of nonoptimal temperature for growth. No correlation between ACC activity and lipid accumulation in the cells was established for three different temperatures. This study demonstrated that the interaction between A. brasilense and C. vulgaris has a significant effect on fatty acid and lipid accumulation in the microalgae.

  16. Field assessment of semi-aerobic condition and the methane correction factor for the semi-aerobic landfills provided by IPCC guidelines.

    Science.gov (United States)

    Jeong, Sangjae; Nam, Anwoo; Yi, Seung-Muk; Kim, Jae Young

    2015-02-01

    According to IPCC guidelines, a semi-aerobic landfill site produces one-half of the amount of CH4 produced by an equally-sized anaerobic landfill site. Therefore categorizing the landfill type is important on greenhouse gas inventories. In order to assess semi-aerobic condition in the sites and the MCF value for semi-aerobic landfill, landfill gas has been measured from vent pipes in five semi-aerobically designed landfills in South Korea. All of the five sites satisfied requirements of semi-aerobic landfills in 2006 IPCC guidelines. However, the ends of leachate collection pipes which are main entrance of air in the semi-aerobic landfill were closed in all five sites. The CH4/CO2 ratio in landfill gas, indicator of aerobic and anaerobic decomposition, ranged from 1.08 to 1.46 which is higher than the values (0.3-1.0) reported for semi-aerobic landfill sites and is rather close to those (1.0-2.0) for anaerobic landfill sites. The low CH4+CO2% in landfill gas implied air intrusion into the landfill. However, there was no evidence that air intrusion has caused by semi-aerobic design and operation. Therefore, the landfills investigated in this study are difficult to be classified as semi-aerobic landfills. Also MCF of 0.5 may significantly underestimate methane emissions compared to other researches. According to the carbon mass balance analyses, the higher MCF needs to be proposed for semi-aerobic landfills. Consequently, methane emission estimate should be based on field evaluation for the semi-aerobically designed landfills. Copyright © 2015. Published by Elsevier Ltd.

  17. Homomorphic encryption and secure comparison

    DEFF Research Database (Denmark)

    Damgård, Ivan Bjerre; Geisler, Martin; Krøigaard, Mikkel

    2008-01-01

    Computation (MPC). We show how our comparison protocol can be used to improve security of online auctions, and demonstrate that it is efficient enough to be used in practice. For comparison of 16 bits numbers with security based on 1024 bits RSA (executed by two parties), our implementation takes 0.28 sec...

  18. An Uneven Illumination Correction Algorithm for Optical Remote Sensing Images Covered with Thin Clouds

    Directory of Open Access Journals (Sweden)

    Xiaole Shen

    2015-09-01

    Full Text Available The uneven illumination phenomenon caused by thin clouds will reduce the quality of remote sensing images, and bring adverse effects to the image interpretation. To remove the effect of thin clouds on images, an uneven illumination correction can be applied. In this paper, an effective uneven illumination correction algorithm is proposed to remove the effect of thin clouds and to restore the ground information of the optical remote sensing image. The imaging model of remote sensing images covered by thin clouds is analyzed. Due to the transmission attenuation, reflection, and scattering, the thin cloud cover usually increases region brightness and reduces saturation and contrast of the image. As a result, a wavelet domain enhancement is performed for the image in Hue-Saturation-Value (HSV color space. We use images with thin clouds in Wuhan area captured by QuickBird and ZiYuan-3 (ZY-3 satellites for experiments. Three traditional uneven illumination correction algorithms, i.e., multi-scale Retinex (MSR algorithm, homomorphic filtering (HF-based algorithm, and wavelet transform-based MASK (WT-MASK algorithm are performed for comparison. Five indicators, i.e., mean value, standard deviation, information entropy, average gradient, and hue deviation index (HDI are used to analyze the effect of the algorithms. The experimental results show that the proposed algorithm can effectively eliminate the influences of thin clouds and restore the real color of ground objects under thin clouds.

  19. 78 FR 75449 - Miscellaneous Corrections; Corrections

    Science.gov (United States)

    2013-12-12

    ... cross- references, correcting grammatical errors, revising language for clarity and consistency, and... practice. Specifically, these amendments are to correct grammatical errors and to revise cross-references.... The final rule contained minor errors in grammar, punctuation, and referencing. This document corrects...

  20. Jet Energy Corrections at CMS

    CERN Document Server

    Santocchia, Attilio

    2009-01-01

    Many physics measurements in CMS will rely on the precise reconstruction of Jets. Correction of the raw jet energy measured by the CMS detector will be a fundamental step for most of the analysis where hadron activity is investigated. Jet correction plans in CMS have been widely studied for different conditions: at stat-up simulation tuned on test-beam data will be used. Then data-driven methods will be available and finally, simulation tuned on collision data will give us the ultimate procedure for calculating jet corrections. Jet transverse energy is corrected first for pile-up and noise offset; correction for the response of the calorimeter as a function of jet pseudorapidity relative to the barrel comes afterwards and correction for the absolute response as a function of transverse momentum in the barrel is the final standard sub-correction applied. Other effects like flavour and parton correction will be optionally applied on the Jet $E_T$ depending on the measurement requests. In this paper w...

  1. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... and Craniofacial Surgery Cleft Lip/Palate and Craniofacial Surgery A cleft lip may require one or more ... find out more. Corrective Jaw Surgery Corrective Jaw Surgery Orthognathic surgery is performed to correct the misalignment ...

  2. Anomaly corrected heterotic horizons

    Energy Technology Data Exchange (ETDEWEB)

    Fontanella, A.; Gutowski, J.B. [Department of Mathematics, University of Surrey, Guildford, GU2 7XH (United Kingdom); Papadopoulos, G. [Department of Mathematics, King’s College London,Strand, London WC2R 2LS (United Kingdom)

    2016-10-21

    We consider supersymmetric near-horizon geometries in heterotic supergravity up to two loop order in sigma model perturbation theory. We identify the conditions for the horizons to admit enhancement of supersymmetry. We show that solutions which undergo supersymmetry enhancement exhibit an sl(2,ℝ) symmetry, and we describe the geometry of their horizon sections. We also prove a modified Lichnerowicz type theorem, incorporating α{sup ′} corrections, which relates Killing spinors to zero modes of near-horizon Dirac operators. Furthermore, we demonstrate that there are no AdS{sub 2} solutions in heterotic supergravity up to second order in α{sup ′} for which the fields are smooth and the internal space is smooth and compact without boundary. We investigate a class of nearly supersymmetric horizons, for which the gravitino Killing spinor equation is satisfied on the spatial cross sections but not the dilatino one, and present a description of their geometry.

  3. NWS Corrections to Observations

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Form B-14 is the National Weather Service form entitled 'Notice of Corrections to Weather Records.' The forms are used to make corrections to observations on forms...

  4. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... Jaw Surgery Download Download the ebook for further information Corrective jaw, or orthognathic surgery is performed by ... your treatment. Correction of Common Dentofacial Deformities ​ ​ The information provided here is not intended as a substitute ...

  5. Probation Officers and Correctional Treatment Specialists.

    Science.gov (United States)

    Alpert, Andrew D.

    2001-01-01

    Discusses the changes in the work of probation officers and correctional treatment specialists. Includes information about job outlook, earnings, training requirements, and working conditions as well as sources of additional information. (JOW)

  6. Fault of the correction factor for pressure and temperature k{sub PT} in the atmospheric conditions of Dosimetric Calibration Lab. - LSCD of ININ - Mexico; Falla del factor de correcion por presion y temperatura k{sub PT} a las condiciones atmosfericas del LSCD-ININ-Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Alvarez R, Jose T.; Jesus Cejudo, A.; La Cruz H., Daniel de; Tovar M, Victor M., E-mail: trinidad.alvarez@inin.gob.mx, E-mail: jesus.cejudo@inin.gob.mx, E-mail: daniel.delacruz@inin.gob.mx, E-mail: victor.tovar@inin.gob.mx [Instituto Nacional de Investigaciones Nucleares (LSCD/ININ), Ocoyoacac (Mexico). Laboratorio Secundario de Calibracion Dosimetrica

    2013-07-01

    The realization of the operational quantities H*, Hp y/0 H'(0.07) for estimating the effective dose E, usually is done by measuring the air kerma Ka air within the field of ionizing radiation of interest and was subsequently applied appropriate conversion factors for both the quality of radiation and the operational quantity of interest. However, the SSDL in performing the Ka to environmental conditions of ININ (3000 m above sea level, P ∼ 710 hPa) with ionization chambers has found that the pressure correction factor and kPT temperature is not sufficient to correct the change in air density. Indeed, in the case of {sup 60}Co the discrepancy between the measurement of a primary standard graphite walls Ka (BEV CC01 be 131) and a side of the plastic walls (Exradin A12) is on the order of 0.4% for the case of the RX BIPM qualities to 100,135, 180 and 250 kV. It was found that for a camera model 30001 PTW (PMMA graphite wall) is needed an additional correction factor k PT ranging from 0.4% to 1.5%, correction factor calculated by MC simulation. For Sk of {sup 125}I brachytherapy sources was given an additional correction lower in 11% compared to conventional k{sub PT} value measured with a well chamber Standard Imaging HDR 1000 plus. Finally, it is in the process of studying the behavior of this additional correction factor to the case of {sup 137}Cs.

  7. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... can also invite bacteria that lead to gum disease. Click here to find out more. Who We ... can also invite bacteria that lead to gum disease. Click here to find out more. Corrective Jaw ...

  8. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... surgery, orthognathic surgery is performed to correct functional problems. Jaw Surgery can have a dramatic effect on ... without straining Chronic mouth breathing Sleep apnea (breathing problems when sleeping, including snoring) Your dentist, orthodontist and ...

  9. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... anesthesia, all forms of sedation and general anesthesia. Click here to find out more. Cleft Lip/Palate ... depending on the extent of the repair needed. Click here to find out more. Corrective Jaw Surgery ...

  10. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... for corrective jaw surgery: Difficulty chewing, or biting food Difficulty swallowing Chronic jaw or jaw joint (TMJ) ... a long-term commitment for you and your family, and will try to realistically estimate the time ...

  11. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... to correct a wide range of minor and major skeletal and dental irregularities, including the misalignment of ... including snoring) Your dentist, orthodontist and OMS will work together to determine whether you are a candidate ...

  12. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... find out more. Wisdom Teeth Management Wisdom Teeth Management An impacted ... and maxillofacial surgeon (OMS) to correct a wide range of minor and major skeletal and dental irregularities, ...

  13. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... Corrective Jaw Surgery Dental and Soft Tissue Surgery Dental Implant Surgery Facial Cosmetic Surgery Head, Neck and Oral Pathology Obstructive Sleep Apnea TMJ and Facial Pain Treatment of Facial Injury Wisdom Teeth Management Procedures ...

  14. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... It can also invite bacteria that lead to gum disease. Click here to find out more. Who We ... It can also invite bacteria that lead to gum disease. Click here to find out more. Corrective Jaw ...

  15. ICT: isotope correction toolbox.

    Science.gov (United States)

    Jungreuthmayer, Christian; Neubauer, Stefan; Mairinger, Teresa; Zanghellini, Jürgen; Hann, Stephan

    2016-01-01

    Isotope tracer experiments are an invaluable technique to analyze and study the metabolism of biological systems. However, isotope labeling experiments are often affected by naturally abundant isotopes especially in cases where mass spectrometric methods make use of derivatization. The correction of these additive interferences--in particular for complex isotopic systems--is numerically challenging and still an emerging field of research. When positional information is generated via collision-induced dissociation, even more complex calculations for isotopic interference correction are necessary. So far, no freely available tools can handle tandem mass spectrometry data. We present isotope correction toolbox, a program that corrects tandem mass isotopomer data from tandem mass spectrometry experiments. Isotope correction toolbox is written in the multi-platform programming language Perl and, therefore, can be used on all commonly available computer platforms. Source code and documentation can be freely obtained under the Artistic License or the GNU General Public License from: https://github.com/jungreuc/isotope_correction_toolbox/ {christian.jungreuthmayer@boku.ac.at,juergen.zanghellini@boku.ac.at} Supplementary data are available at Bioinformatics online. © The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.

  16. Model Correction Factor Method

    DEFF Research Database (Denmark)

    Christensen, Claus; Randrup-Thomsen, Søren; Morsing Johannesen, Johannes

    1997-01-01

    The model correction factor method is proposed as an alternative to traditional polynomial based response surface techniques in structural reliability considering a computationally time consuming limit state procedure as a 'black box'. The class of polynomial functions is replaced by a limit stat...

  17. Correction to ATel 10681

    Science.gov (United States)

    Wang, Xiaofeng

    2017-08-01

    We report a correction to the spectroscopic classification of two optical transients announced in ATel #10681. In the main text of the telegram, SN 2017giq and MASTER OT J033744.97+723159.0 should be classified as type Ic and type IIb supernovae, respectively, which were reversed in the original report. We apologize for any confusion caused by this typo error.

  18. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... can also invite bacteria that lead to gum disease. Click here to find out more. Who We Are Find a Surgeon News Videos Contact Administration of Anesthesia Cleft Lip/Palate and Craniofacial Surgery Corrective Jaw Surgery Dental and Soft Tissue Surgery Dental Implant Surgery Facial ...

  19. Error Correcting Codes

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 1; Issue 10. Error Correcting Codes How Numbers Protect Themselves. Priti Shankar. Series Article Volume 1 ... Author Affiliations. Priti Shankar1. Department of Computer Science and Automation, Indian Institute of Science, Bangalore 560 012, India ...

  20. Error Correcting Codes

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 2; Issue 3. Error Correcting Codes - Reed Solomon Codes. Priti Shankar. Series Article Volume 2 Issue 3 March 1997 pp 33-47. Fulltext. Click here to view fulltext PDF. Permanent link: http://www.ias.ac.in/article/fulltext/reso/002/03/0033-0047 ...

  1. Text Induced Spelling Correction

    NARCIS (Netherlands)

    Reynaert, M.W.C.

    2004-01-01

    We present TISC, a language-independent and context-sensitive spelling checking and correction system designed to facilitate the automatic removal of non-word spelling errors in large corpora. Its lexicon is derived from a very large corpus of raw text, without supervision, and contains word

  2. Correctness of concurrent processes

    NARCIS (Netherlands)

    E.R. Olderog (Ernst-Rüdiger)

    1989-01-01

    textabstractA new notion of correctness for concurrent processes is introduced and investigated. It is a relationship P sat S between process terms P built up from operators of CCS [Mi 80], CSP [Ho 85] and COSY [LTS 79] and logical formulas S specifying sets of finite communication sequences as in

  3. 10. Correctness of Programs

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 3; Issue 4. Algorithms - Correctness of Programs. R K Shyamasundar. Series Article Volume 3 ... Author Affiliations. R K Shyamasundar1. Computer Science Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India.

  4. Refraction corrections for surveying

    Science.gov (United States)

    Lear, W. M.

    1980-01-01

    Optical measurements of range and elevation angles are distorted by refraction of Earth's atmosphere. Theoretical discussion of effect, along with equations for determining exact range and elevation corrections, is presented in report. Potentially useful in optical site surveying and related applications, analysis is easily programmed on pocket calculator. Input to equation is measured range and measured elevation; output is true range and true elevation.

  5. Error Correcting Codes

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 2; Issue 1. Error Correcting Codes The Hamming Codes. Priti Shankar. Series Article Volume 2 Issue 1 January ... Author Affiliations. Priti Shankar1. Department of Computer Science and Automation, Indian Institute of Science, Bangalore 560 012, India ...

  6. Issues in Correctional Training and Casework. Correctional Monograph.

    Science.gov (United States)

    Wolford, Bruce I., Ed.; Lawrenz, Pam, Ed.

    The eight papers contained in this monograph were drawn from two national meetings on correctional training and casework. Titles and authors are: "The Challenge of Professionalism in Correctional Training" (Michael J. Gilbert); "A New Perspective in Correctional Training" (Jack Lewis); "Reasonable Expectations in Correctional Officer Training:…

  7. Corrective action management (CAM) process guide

    Energy Technology Data Exchange (ETDEWEB)

    Lutter, T.M., Westinghouse Hanford

    1996-06-18

    Consistent direction for identification, long-term reporting and trending, and correction of conditions adverse to the environment, safety and health will facilitate a successful transition and follow- on for the Project Hanford Management Contractor (PHMC). Continuity of the corrective action management process is vital. It provides consistency via reporting and trending on corrective action management activities at the Site during the transition process. To ensure success,consideration of the business rules and the Hanford Action Tracking System (HATS), the automated tool that supports them, is essential. This document provides a consolidated synopsis of corrective action management business rules, the process, and the HATS to support the transition process at Hanford. It applies to the baseline of corrective action work the PHMC and its subcontractors will inherit. HATS satisfies the requirement for collection of data that enables long-term reporting and trending. The information contains all originating document, condition,and action data. HATS facilitates consistent tracking,reporting, closure, and trending of the corrective action work in progress across the Site. HATS follows the glossary standard definitions for commitment tracking listed in Appendix A and Site data value standards that are applicable. For long term access and use, HATS data are fed to a full text search and retrieval system called Search Hanford Accessible Reports Electronically(SHARE). An individual, organization, or company has the ability, through SHARE, to pull together the appropriate information as needed.

  8. Investigating the Speech Act of Correction in Iraqi EFL Context

    Science.gov (United States)

    Darweesh, Abbas Deygan; Mehdi, Wafaa Sahib

    2016-01-01

    The present paper investigates the performance of the Iraqi students for the speech act of correction and how it is realized with status unequal. It attempts to achieve the following aims: (1) Setting out the felicity conditions for the speech act of correction in terms of Searle conditions; (2) Identifying the semantic formulas that realize the…

  9. Managing HIV/AIDS in correctional settings.

    Science.gov (United States)

    Springer, Sandra A; Altice, Frederick L

    2005-11-01

    Approximately one quarter of people living with HIV/AIDS in the United States pass through the correctional system, resulting in a burden of infection on the correctional health care system that has challenged correctional and public health officials. The HIV epidemic behind bars results from the high prevalence of HIV risk behaviors among those incarcerated: illicit drug use, untreated mental illness, prostitution, homelessness, and poverty. Challenges to HIV care in correctional settings include management of comorbid conditions, remoteness from HIV care sites, organizational constraints, and access to effective therapies. Despite these challenges, prisoners with HIV have derived considerable benefit from HIV detection and treatment. In order to achieve parity in HIV outcomes among vulnerable populations, effective prison-release programs that incorporate effective case management with effective drug treatment and adherence strategies are required to extend the benefit of highly active antiretroviral therapy as prisoners transition back to community settings.

  10. Investigations of Fully Homomorphic Encryption (IFHE)

    Science.gov (United States)

    2015-05-01

    implement the SubBytes we used the “depth- 16” circuit of Boyar and Peralta [3], which consumes four levels. The rest of the round function can be...Computer Science, pages 403–415. Springer, 2011. [3] Joan Boyar and René Peralta . A depth-16 circuit for the AES S-box. Manuscript, http://eprint

  11. Digital Image Deblurring by Nonlinear Homomorphic Filtering

    Science.gov (United States)

    1974-08-01

    time. UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGErifh»n Dmlm Enltrtd) mgm mmm UMMAdMIWBMMMMM ^M«. ■ i titmlMmtimiMmUlim wmw . HiiMiBii iiniij...same title submitted to the Department of Electrical Engineering , University of Utah...IM ’ wmw ^m n*1 m I l MllOT^«^r^Mnp«P> ^n IILI«^ 25 Combining now th« phase of the blurt with the magnitude of the reetoratlon filter of

  12. Multiparty Computation from Somewhat Homomorphic Encryption

    DEFF Research Database (Denmark)

    Damgård, Ivan Bjerre; Pastro, Valerio; Smart, Nigel

    2011-01-01

    We propose a general multiparty computation protocol secure against an active adversary corrupting up to $n-1$ of the $n$ players. The protocol may be used to compute securely arithmetic circuits over any finite field $\\F_{p^k}$. Our protocol consists of a preprocessing phase that is both...

  13. Correction of refractive errors

    Directory of Open Access Journals (Sweden)

    Vladimir Pfeifer

    2005-10-01

    Full Text Available Background: Spectacles and contact lenses are the most frequently used, the safest and the cheapest way to correct refractive errors. The development of keratorefractive surgery has brought new opportunities for correction of refractive errors in patients who have the need to be less dependent of spectacles or contact lenses. Until recently, RK was the most commonly performed refractive procedure for nearsighted patients.Conclusions: The introduction of excimer laser in refractive surgery has given the new opportunities of remodelling the cornea. The laser energy can be delivered on the stromal surface like in PRK or deeper on the corneal stroma by means of lamellar surgery. In LASIK flap is created with microkeratome in LASEK with ethanol and in epi-LASIK the ultra thin flap is created mechanically.

  14. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... a serious and even life-threatening condition. The risks of undiagnosed OSA are many. Click here to ... a serious and even life-threatening condition. The risks of undiagnosed OSA are many. Click here to ...

  15. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... sleep apnea (OSA) is a serious and even life-threatening condition. The risks of undiagnosed OSA are ... sleep apnea (OSA) is a serious and even life-threatening condition. The risks of undiagnosed OSA are ...

  16. Calculating correct compilers

    OpenAIRE

    Bahr, Patrick; Hutton, Graham

    2015-01-01

    In this article we present a new approach to the problem of calculating compilers. In particular, we develop a simple but general technique that allows us to derive correct compilers from high- level semantics by systematic calculation, with all details of the implementation of the compilers falling naturally out of the calculation process. Our approach is based upon the use of standard equational reasoning techniques, and has been applied to calculate compilers for a wide range of language f...

  17. [Correct contact lens hygiene].

    Science.gov (United States)

    Blümle, S; Kaercher, T; Khaireddin, R

    2013-06-01

    Although contact lenses have long been established in ophthalmology, practical aspects of handling contact lenses is becoming increasingly less important in the clinical training as specialist for ophthalmology. Simultaneously, for many reasons injuries due to wearing contact lenses are increasing. In order to correct this discrepancy, information on contact lenses and practical experience with them must be substantially increased from a medical perspective. This review article deals with the most important aspects for prevention of complications, i.e. contact lens hygiene.

  18. Gain Shift Corrections at Chi-Nu

    Energy Technology Data Exchange (ETDEWEB)

    Brown, Tristan Brooks [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Massachusetts, Lowell, MA (United States). Dept. of Physics and Applied Physics; Devlin, Matthew James [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-08-30

    Ambient conditions have the potential to cause changes in liquid scintillator detector gain that vary with time and temperature. These gain shifts can lead to poor resolution in both energy as well as pulse shape discrimination. In order to correct for these shifts in the Chi-Nu high energy array, a laser system has been developed for calibration of the pulse height signals.

  19. Brain Image Motion Correction

    DEFF Research Database (Denmark)

    Jensen, Rasmus Ramsbøl; Benjaminsen, Claus; Larsen, Rasmus

    2015-01-01

    The application of motion tracking is wide, including: industrial production lines, motion interaction in gaming, computer-aided surgery and motion correction in medical brain imaging. Several devices for motion tracking exist using a variety of different methodologies. In order to use such devices...... offset and tracking noise in medical brain imaging. The data are generated from a phantom mounted on a rotary stage and have been collected using a Siemens High Resolution Research Tomograph for positron emission tomography. During acquisition the phantom was tracked with our latest tracking prototype...

  20. Turbulence compressibility corrections

    Science.gov (United States)

    Coakley, T. J.; Horstman, C. C.; Marvin, J. G.; Viegas, J. R.; Bardina, J. E.; Huang, P. G.; Kussoy, M. I.

    1994-01-01

    The basic objective of this research was to identify, develop and recommend turbulence models which could be incorporated into CFD codes used in the design of the National AeroSpace Plane vehicles. To accomplish this goal, a combined effort consisting of experimental and theoretical phases was undertaken. The experimental phase consisted of a literature survey to collect and assess a database of well documented experimental flows, with emphasis on high speed or hypersonic flows, which could be used to validate turbulence models. Since it was anticipated that this database would be incomplete and would need supplementing, additional experiments in the NASA Ames 3.5-Foot Hypersonic Wind Tunnel (HWT) were also undertaken. The theoretical phase consisted of identifying promising turbulence models through applications to simple flows, and then investigating more promising models in applications to complex flows. The complex flows were selected from the database developed in the first phase of the study. For these flows it was anticipated that model performance would not be entirely satisfactory, so that model improvements or corrections would be required. The primary goals of the investigation were essentially achieved. A large database of flows was collected and assessed, a number of additional hypersonic experiments were conducted in the Ames HWT, and two turbulence models (kappa-epsilon and kappa-omega models with corrections) were determined which gave superior performance for most of the flows studied and are now recommended for NASP applications.

  1. 75 FR 16516 - Dates Correction

    Science.gov (United States)

    2010-04-01

    ... From the Federal Register Online via the Government Publishing Office ] NATIONAL ARCHIVES AND RECORDS ADMINISTRATION Office of the Federal Register Dates Correction Correction In the Notices section... through 15499, the date at the top of each page is corrected to read ``Monday, March 29, 2010''. This...

  2. 77 FR 39899 - Technical Corrections

    Science.gov (United States)

    2012-07-06

    ..., correcting authority citations and typographical and spelling errors, and making other edits and conforming... I office; correcting typographical and spelling errors; and making other edits and conforming...).'' Correct Typographical Error. In Sec. 73.55(i)(4)(ii)(G), the word ``the'' was omitted due to a clerical...

  3. Job Satisfaction in Correctional Officers.

    Science.gov (United States)

    Diehl, Ron J.

    For more than a decade, correctional leaders throughout the country have attempted to come to grips with the basic issues involved in ascertaining and meeting the needs of correctional institutions. This study investigated job satisfaction in 122 correctional officers employed in both rural and urban prison locations for the State of Kansas…

  4. 78 FR 34245 - Miscellaneous Corrections

    Science.gov (United States)

    2013-06-07

    ... office, correcting and adding missing cross-references, correcting grammatical errors, revising language... grammatical errors, revising language for clarity and consistency, and specifying metric units. This document... Correct Grammatical Error. In Sec. 73.6, paragraph (a) is revised to replace the colon at the end of the...

  5. EDITORIAL: Politically correct physics?

    Science.gov (United States)

    Pople Deputy Editor, Stephen

    1997-03-01

    If you were a caring, thinking, liberally minded person in the 1960s, you marched against the bomb, against the Vietnam war, and for civil rights. By the 1980s, your voice was raised about the destruction of the rainforests and the threat to our whole planetary environment. At the same time, you opposed discrimination against any group because of race, sex or sexual orientation. You reasoned that people who spoke or acted in a discriminatory manner should be discriminated against. In other words, you became politically correct. Despite its oft-quoted excesses, the political correctness movement sprang from well-founded concerns about injustices in our society. So, on balance, I am all for it. Or, at least, I was until it started to invade science. Biologists were the first to feel the impact. No longer could they refer to 'higher' and 'lower' orders, or 'primitive' forms of life. To the list of undesirable 'isms' - sexism, racism, ageism - had been added a new one: speciesism. Chemists remained immune to the PC invasion, but what else could you expect from a group of people so steeped in tradition that their principal unit, the mole, requires the use of the thoroughly unreconstructed gram? Now it is the turn of the physicists. This time, the offenders are not those who talk disparagingly about other people or animals, but those who refer to 'forms of energy' and 'heat'. Political correctness has evolved into physical correctness. I was always rather fond of the various forms of energy: potential, kinetic, chemical, electrical, sound and so on. My students might merge heat and internal energy into a single, fuzzy concept loosely associated with moving molecules. They might be a little confused at a whole new crop of energies - hydroelectric, solar, wind, geothermal and tidal - but they could tell me what devices turned chemical energy into electrical energy, even if they couldn't quite appreciate that turning tidal energy into geothermal energy wasn't part of the

  6. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... Sleep Apnea Obstructive Sleep Apnea Obstructive sleep apnea (OSA) is a serious and even life-threatening condition. The risks of undiagnosed OSA are many. Click here to find out more. ...

  7. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... more. Obstructive Sleep Apnea Obstructive Sleep Apnea Obstructive sleep apnea (OSA) is a serious and even life-threatening condition. The risks of undiagnosed OSA are many. Click here to ...

  8. Inflationary power spectra with quantum holonomy corrections

    CERN Document Server

    Mielczarek, Jakub

    2013-01-01

    In this paper we study slow-roll inflation with holonomy corrections from loop quantum cosmology. Both tensor and scalar power spectra of primordial perturbations are computed up to the first order in slow-roll parameters and $V/\\rho_{c}$, where $V$ is a potential of the scalar field and $\\rho_{c}$ is a critical energy density (expected to be of the order of the Planck energy density). Possible normalizations of modes at short scales are discussed. In case the normalization is performed with use of the Wronskian condition applied to adiabatic vacuum, the tensor and scalar spectral indices are not quantum corrected in the leading order. However, by choosing an alternative method of normalization one can obtain quantum corrections in the leading order. Furthermore, we show that the holonomy-corrected equation of motion for tensor modes can be derived from an effective background metric. This allows us to prove that the Wronskian normalization condition for the tensor modes preserves the classical form.

  9. Analytic quantum-interference conditions in Coulomb corrected photoelectron holography

    Science.gov (United States)

    Maxwell, A. S.; Al-Jawahiry, A.; Lai, X. Y.; Figueira de Morisson Faria, C.

    2018-02-01

    We provide approximate analytic expressions for above-threshold ionization (ATI) transition probabilities and photoelectron angular distributions. These analytic expressions are more general than those existing in the literature and include the residual binding potential in the electron continuum propagation. They successfully reproduce the ATI side lobes and specific holographic structures such as the near-threshold fan-shaped pattern and the spider-like structure that extends up to relatively high photoelectron energies. We compare such expressions with the Coulomb quantum orbit strong-field approximation (CQSFA) and the full solution of the time-dependent Schrödinger equation for different driving-field frequencies and intensities, and provide an in-depth analysis of the physical mechanisms behind specific holographic structures. Our results shed additional light on what aspects of the CQSFA must be prioritized in order to obtain the key holographic features, and highlight the importance of forward scattered trajectories. Furthermore, we find that the holographic patterns change considerably for different field parameters, even if the Keldysh parameter is kept roughly the same.

  10. SJVS October 2012 correction

    African Journals Online (AJOL)

    HP USER

    Abstract. The aim of the present study was to follow the time related developmental changes of caprine foetuses to aid in their age determination. Certain gross external features along with body size changes were studied. Twenty five pregnant Sahel does of known gestational age managed under controlled conditions were ...

  11. Agrosearch 2015. Corrected

    African Journals Online (AJOL)

    Ployhart, 2006) affirmed the need to create work conditions that promote and sustain employee motivation and well-being. The human resources used by ADP are of different cadres of agricultural extension agents such as Village Extension Agents (VEAS) and Block extension supervisors (BES). The need to motivate these ...

  12. SJVS October 2012 correction

    African Journals Online (AJOL)

    HP USER

    Strict biosecurity measures in addition to vaccinations, are strategic prevention and control policies adopted to control some contagious poultry diseases as vaccinations alone are not enough to control them under field conditions (Abdu, 2007). Good husbandry practices such as adequate feeding, housing and stocking to ...

  13. A locally adaptive algorithm for shadow correction in color images

    Science.gov (United States)

    Karnaukhov, Victor; Kober, Vitaly

    2017-09-01

    The paper deals with correction of color images distorted by spatially nonuniform illumination. A serious distortion occurs in real conditions when a part of the scene containing 3D objects close to a directed light source is illuminated much brighter than the rest of the scene. A locally-adaptive algorithm for correction of shadow regions in color images is proposed. The algorithm consists of segmentation of shadow areas with rank-order statistics followed by correction of nonuniform illumination with human visual perception approach. The performance of the proposed algorithm is compared to that of common algorithms for correction of color images containing shadow regions.

  14. Visual performance in cataract patients with low levels of postoperative astigmatism: full correction versus spherical equivalent correction

    Directory of Open Access Journals (Sweden)

    Lehmann RP

    2012-03-01

    Full Text Available Robert P Lehmann1, Diane M Houtman21Lehmann Eye Center, Nacogdoches, TX, 2Alcon Research Ltd, Fort Worth, TX, USAPurpose: To evaluate whether visual performance could be improved in pseudophakic subjects by correcting low levels of postoperative astigmatism.Methods: An exploratory, noninterventional study was conducted using subjects who had been implanted with an aspheric intraocular lens and had 0.5–0.75 diopter postoperative astigmatism. Monocular visual performance using full correction was compared with visual performance using spherical equivalent correction. Testing consisted of high- and low-contrast visual acuity, contrast sensitivity, and reading acuity and speed using the Radner Reading Charts.Results: Thirty-eight of 40 subjects completed testing. Visual acuities at three contrast levels (100%, 25%, and 9% were significantly better using full correction than when using spherical equivalent correction (all P < 0.001. For contrast sensitivity testing under photopic, mesopic, and mesopic with glare conditions, only one out of twelve outcomes demonstrated a significant improvement with full correction compared with spherical equivalent correction (at six cycles per degree under mesopic without glare conditions, P = 0.046. Mean reading speed was numerically faster with full correction across all print sizes, reaching statistical significance at logarithm of the reading acuity determination (logRAD 0.2, 0.7, and 1.1 (P , 0.05. Statistically significant differences also favored full correction in logRAD score (P = 0.0376, corrected maximum reading speed (P < 0.001, and logarithm of the minimum angle of resolution/logRAD ratio (P < 0.001.Conclusions: In this study of pseudophakic subjects with low levels of postoperative astigmatism, full correction yielded significantly better reading performance and high- and low-contrast visual acuity than spherical equivalent correction, suggesting that cataractous patients may benefit from surgical

  15. Generic atmospheric correction models for radar measurements

    Science.gov (United States)

    Li, Zhenhong; Yu, Chen; Crippa, Paola; Penna, Nigel

    2017-04-01

    Atmospheric effects (especially the part due to tropospheric water vapour) represent one of the major error sources of repeat-pass Interferometric Synthetic Aperture Radar (InSAR), and limit the accuracy of InSAR derived surface displacements. The spatio-temporal variations of atmospheric water vapour make it a challenge to measure small-amplitude surface displacements with InSAR. In previous studies, several InSAR atmospheric correction models have been successfully demonstrated: (1) Ground-based correction models such as those using Global Navigation Satellite System (GNSS) and/or surface meteorological observations, (2) Space-based correction models including those involving NASA Moderate Resolution Imaging Spectroradiometer (MODIS) and/or ESA Medium Resolution Imaging Spectrometer (MERIS), and (3) Numerical Weather Model (NWM) based corrections including those using the European Centre for Medium-Range Weather Forecasts (ECMWF) ERA-Interim and/or Weather Research and Forecasting (WRF) models. Each model has its own inherited limitations. For example, ground-based correction models are limited by the availability (and distribution) of ground observations, whilst MODIS/MERIS correction models are sensitive to the presence of clouds and there is often a time difference between space-based water vapour and radar observations. Similar to space-based correction models, NWM correction models might be impacted by the time difference between NWM and radar observations. Taking into account the inherent advantages and limitations of GNSS, MODIS and ECMWF water vapour products, we aim to develop a global and near-real-time mode InSAR atmospheric correction model. Tropospheric delays can be routinely retrieved from ground-based GNSS arrays in all-weather conditions and also in real-time. We develop an Iterative Tropospheric Decomposition (ITD) interpolation model that decouples the GNSS-estimated total tropospheric delays into (i) a stratified component highly correlated

  16. Processor register error correction management

    Energy Technology Data Exchange (ETDEWEB)

    Bose, Pradip; Cher, Chen-Yong; Gupta, Meeta S.

    2016-12-27

    Processor register protection management is disclosed. In embodiments, a method of processor register protection management can include determining a sensitive logical register for executable code generated by a compiler, generating an error-correction table identifying the sensitive logical register, and storing the error-correction table in a memory accessible by a processor. The processor can be configured to generate a duplicate register of the sensitive logical register identified by the error-correction table.

  17. Program Derivation by Correctness Enhacements

    Directory of Open Access Journals (Sweden)

    Nafi Diallo

    2016-06-01

    Full Text Available Relative correctness is the property of a program to be more-correct than another program with respect to a given specification. Among the many properties of relative correctness, that which we found most intriguing is the property that program P' refines program P if and only if P' is more-correct than P with respect to any specification. This inspires us to reconsider program derivation by successive refinements: each step of this process mandates that we transform a program P into a program P' that refines P, i.e. P' is more-correct than P with respect to any specification. This raises the question: why should we want to make P' more-correct than P with respect to any specification, when we only have to satisfy specification R? In this paper, we discuss a process of program derivation that replaces traditional sequence of refinement-based correctness-preserving transformations starting from specification R by a sequence of relative correctness-based correctness-enhancing transformations starting from abort.

  18. Towards self-correcting quantum memories

    Science.gov (United States)

    Michnicki, Kamil

    This thesis presents a model of self-correcting quantum memories where quantum states are encoded using topological stabilizer codes and error correction is done using local measurements and local dynamics. Quantum noise poses a practical barrier to developing quantum memories. This thesis explores two types of models for suppressing noise. One model suppresses thermalizing noise energetically by engineering a Hamiltonian with a high energy barrier between code states. Thermalizing dynamics are modeled phenomenologically as a Markovian quantum master equation with only local generators. The second model suppresses stochastic noise with a cellular automaton that performs error correction using syndrome measurements and a local update rule. Several ways of visualizing and thinking about stabilizer codes are presented in order to design ones that have a high energy barrier: the non-local Ising model, the quasi-particle graph and the theory of welded stabilizer codes. I develop the theory of welded stabilizer codes and use it to construct a code with the highest known energy barrier in 3-d for spin Hamiltonians: the welded solid code. Although the welded solid code is not fully self correcting, it has some self correcting properties. It has an increased memory lifetime for an increased system size up to a temperature dependent maximum. One strategy for increasing the energy barrier is by mediating an interaction with an external system. I prove a no-go theorem for a class of Hamiltonians where the interaction terms are local, of bounded strength and commute with the stabilizer group. Under these conditions the energy barrier can only be increased by a multiplicative constant. I develop cellular automaton to do error correction on a state encoded using the toric code. The numerical evidence indicates that while there is no threshold, the model can extend the memory lifetime significantly. While of less theoretical importance, this could be practical for real

  19. Diamagnetic Corrections and Pascal's Constants

    Science.gov (United States)

    Bain, Gordon A.; Berry, John F.

    2008-01-01

    Measured magnetic susceptibilities of paramagnetic substances must typically be corrected for their underlying diamagnetism. This correction is often accomplished by using tabulated values for the diamagnetism of atoms, ions, or whole molecules. These tabulated values can be problematic since many sources contain incomplete and conflicting data.…

  20. Unpacking Corrections in Mobile Instruction

    DEFF Research Database (Denmark)

    Levin, Lena; Cromdal, Jakob; Broth, Mathias

    2017-01-01

    This article deals with the organisation of correction in mobile instructional settings. Five sets of video data (>250 h) documenting how learners were instructed to fly aeroplanes, drive cars and ride bicycles in real life traffic were examined to reveal some common features of correction exchan...

  1. Space mapping and defect correction

    NARCIS (Netherlands)

    Echeverría, D.; Hemker, P.W.

    2005-01-01

    In this paper we show that space-mapping optimization can be understood in the framework of defect correction. Then, space-mapping algorithms can be seen as special cases of defect correction iteration. In order to analyze the properties of space mapping and the space-mapping function, we introduce

  2. Correctional Officers With Case Loads

    Science.gov (United States)

    Ward, Richard J.; Vandergoot, David

    1977-01-01

    The Maryland Division of Correction has implemented an innovative program that permits correctional officers to combine counseling case-management functions with their custory functions. Basically, the program relies on the quality of individual programming that results from the close personal, working relationship developed between officer and…

  3. Food systems in correctional settings

    DEFF Research Database (Denmark)

    Smoyer, Amy; Kjær Minke, Linda

    Food is a central component of life in correctional institutions and plays a critical role in the physical and mental health of incarcerated people and the construction of prisoners' identities and relationships. An understanding of the role of food in correctional settings and the effective mana......, including a case study of food-related innovation in the Danish correctional system. It offers specific conclusions for policy-makers, administrators of correctional institutions and prison-food-service professionals, and makes proposals for future research.......Food is a central component of life in correctional institutions and plays a critical role in the physical and mental health of incarcerated people and the construction of prisoners' identities and relationships. An understanding of the role of food in correctional settings and the effective...... management of food systems may improve outcomes for incarcerated people and help correctional administrators to maximize their health and safety. This report summarizes existing research on food systems in correctional settings and provides examples of food programmes in prison and remand facilities...

  4. author's correction 1..1

    Indian Academy of Sciences (India)

    B Indian Academy of Sciences. Author's correction. Cullin-5 and cullin-2 play a role in the development of neuromuscular junction and the female germ line of Drosophila. Champakali Ayyub. J. Genet. 90, 239Y249. The correct figure 5A is as follows: Journal of Genetics, Vol. 90, No. 3, December 2011. 519.

  5. Virtual illumination grid for correction of uncontrolled illumination in facial images

    NARCIS (Netherlands)

    Boom, B.J.; Spreeuwers, Lieuwe Jan; Veldhuis, Raymond N.J.

    Face recognition under uncontrolled illumination conditions is still considered an unsolved problem. In order to correct for these illumination conditions, we propose a virtual illumination grid (VIG) approach to model the unknown illumination conditions. Furthermore, we use coupled subspace models

  6. Optimizing the Frequency of Quantum Error Correction

    Science.gov (United States)

    Abu-Nada, Ali; Fortescue, Ben; Byrd, Mark

    2017-11-01

    A common assumption is that one applies a fault-tolerant quantum error correction (FTQEC) after every gate during quantum computing. However, it is known that this is not always optimal, since the FTQEC procedure itself can introduce errors. Here we vary the number of logical gates between FTQEC operations given that a failure of a postselection condition may cause the FTQEC to be skipped. We derive an expression for the logical error rate as a function of the error-correction frequency and find the optimal frequency for the application of the FTQEC. Furthermore, we show that this is relatively insensitive to the postselection failure probability for a large range of such probabilities. We provide an example of the application of the analytic expression to the ⟦ 7 ,1 ,3 ⟧ Steane code and data derived from a Monte Carlo simulation.

  7. Resolution methods in proving the program correctness

    Directory of Open Access Journals (Sweden)

    Markoski Branko

    2007-01-01

    Full Text Available Program testing determines whether its behavior matches the specification, and also how it behaves in different exploitation conditions. Proving of program correctness is reduced to finding a proof for assertion that given sequence of formulas represents derivation within a formal theory of special predicted calculus. A well-known variant of this conception is described: correctness based on programming logic rules. It is shown that programming logic rules may be used in automatic resolution procedure. Illustrative examples are given, realized in prolog-like LP-language (with no restrictions to Horn's clauses and without the final failure. Basic information on LP-language are also given. It has been shown how a Pascal-program is being executed in LP-system proffer.

  8. Linear network error correction coding

    CERN Document Server

    Guang, Xuan

    2014-01-01

    There are two main approaches in the theory of network error correction coding. In this SpringerBrief, the authors summarize some of the most important contributions following the classic approach, which represents messages by sequences?similar to algebraic coding,?and also briefly discuss the main results following the?other approach,?that uses the theory of rank metric codes for network error correction of representing messages by subspaces. This book starts by establishing the basic linear network error correction (LNEC) model and then characterizes two equivalent descriptions. Distances an

  9. Corrective Action Plan for Corrective Action Unit 417: Central Nevada Test Area Surface, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    K. Campbell

    2000-04-01

    This Corrective Action Plan provides methods for implementing the approved corrective action alternative as provided in the Corrective Action Decision Document for the Central Nevada Test Area (CNTA), Corrective Action Unit (CAU) 417 (DOE/NV, 1999). The CNTA is located in the Hot Creek Valley in Nye County, Nevada, approximately 137 kilometers (85 miles) northeast of Tonopah, Nevada. The CNTA consists of three separate land withdrawal areas commonly referred to as UC-1, UC-3, and UC-4, all of which are accessible to the public. CAU 417 consists of 34 Corrective Action Sites (CASs). Results of the investigation activities completed in 1998 are presented in Appendix D of the Corrective Action Decision Document (DOE/NV, 1999). According to the results, the only Constituent of Concern at the CNTA is total petroleum hydrocarbons (TPH). Of the 34 CASs, corrective action was proposed for 16 sites in 13 CASs. In fiscal year 1999, a Phase I Work Plan was prepared for the construction of a cover on the UC-4 Mud Pit C to gather information on cover constructibility and to perform site management activities. With Nevada Division of Environmental Protection concurrence, the Phase I field activities began in August 1999. A multi-layered cover using a Geosynthetic Clay Liner as an infiltration barrier was constructed over the UC-4 Mud Pit. Some TPH impacted material was relocated, concrete monuments were installed at nine sites, signs warning of site conditions were posted at seven sites, and subsidence markers were installed on the UC-4 Mud Pit C cover. Results from the field activities indicated that the UC-4 Mud Pit C cover design was constructable and could be used at the UC-1 Central Mud Pit (CMP). However, because of the size of the UC-1 CMP this design would be extremely costly. An alternative cover design, a vegetated cover, is proposed for the UC-1 CMP.

  10. Block error correction codes for face recognition

    Science.gov (United States)

    Hussein, Wafaa R.; Sellahewa, Harin; Jassim, Sabah A.

    2011-06-01

    Face recognition is one of the most desirable biometric-based authentication schemes to control access to sensitive information/locations and as a proof of identity to claim entitlement to services. The aim of this paper is to develop block-based mechanisms, to reduce recognition errors that result from varying illumination conditions with emphasis on using error correction codes. We investigate the modelling of error patterns in different parts/blocks of face images as a result of differences in illumination conditions, and we use appropriate error correction codes to deal with the corresponding distortion. We test the performance of our proposed schemes using the Extended Yale-B Face Database, which consists of face images belonging to 5 illumination subsets depending on the direction of light source from the camera. In our experiments each image is divided into three horizontal regions as follows: region1, three rows above the eyebrows, eyebrows and eyes; region2, nose region and region3, mouth and chin region. By estimating statistical parameters for errors in each region we select suitable BCH error correction codes that yield improved recognition accuracy for that particular region in comparison to applying error correction codes to the entire image. Discrete Wavelet Transform (DWT) to a depth of 3 is used for face feature extraction, followed by global/local binarization of coefficients in each subbands. We shall demonstrate that the use of BCH improves separation of the distribution of Hamming distances of client-client samples from the distribution of Hamming distances of imposter-client samples.

  11. Libertarian Anarchism Is Apodictically Correct

    OpenAIRE

    Redford, James

    2011-01-01

    James Redford, "Libertarian Anarchism Is Apodictically Correct", Social Science Research Network (SSRN), Dec. 15, 2011, 9 pp., doi:10.2139/ssrn.1972733. ABSTRACT: It is shown that libertarian anarchism (i.e., consistent liberalism) is unavoidably true.

  12. Corrective measures evaluation report for Tijeras Arroyo groundwater.

    Energy Technology Data Exchange (ETDEWEB)

    Witt, Johnathan L (North Wind, Inc., Idaho Falls, ID); Orr, Brennon R. (North Wind, Inc., Idaho Falls, ID); Dettmers, Dana L. (North Wind, Inc., Idaho Falls, ID); Hall, Kevin A. (North Wind, Inc., Idaho Falls, ID); Howard, M. Hope (North Wind, Inc., Idaho Falls, ID)

    2005-08-01

    This Corrective Measures Evaluation report was prepared as directed by a Compliance Order on Consent issued by the New Mexico Environment Department to document the process of selecting the preferred remedial alternative for Tijeras Arroyo Groundwater. Supporting information includes background concerning the site conditions and potential receptors and an overview of work performed during the Corrective Measures Evaluation. The evaluation of remedial alternatives included identifying and describing four remedial alternatives, an overview of the evaluation criteria and approach, comparing remedial alternatives to the criteria, and selecting the preferred remedial alternative. As a result of the Corrective Measures Evaluation, monitored natural attenuation of the contaminants of concern (trichloroethene and nitrate) is the preferred remedial alternative for implementation as the corrective measure for Tijeras Arroyo Groundwater. Design criteria to meet cleanup goals and objectives and the corrective measures implementation schedule for the preferred remedial alternative are also presented.

  13. Error correcting coding for OTN

    DEFF Research Database (Denmark)

    Justesen, Jørn; Larsen, Knud J.; Pedersen, Lars A.

    2010-01-01

    Forward error correction codes for 100 Gb/s optical transmission are currently receiving much attention from transport network operators and technology providers. We discuss the performance of hard decision decoding using product type codes that cover a single OTN frame or a small number...... of such frames. In particular we argue that a three-error correcting BCH is the best choice for the component code in such systems....

  14. Beam Trajectory Correction for SNS

    CERN Document Server

    Chu, Chungming

    2005-01-01

    Automated beam trajectory correction with dipole correctors is developed and tested during the Spallation Neutron Source warm linac commissioning periods. The application is based on the XAL Java framework with newly developed optimization tools. Also, dipole corrector polarities and strengths, and beam position monitor (BPM) polarities were checked by an orbit difference program. The on-line model is used in both the trajectory correction and the orbit difference applications. Experimental data for both applications will be presented.

  15. Quantum error correction for beginners

    Science.gov (United States)

    Devitt, Simon J.; Munro, William J.; Nemoto, Kae

    2013-07-01

    Quantum error correction (QEC) and fault-tolerant quantum computation represent one of the most vital theoretical aspects of quantum information processing. It was well known from the early developments of this exciting field that the fragility of coherent quantum systems would be a catastrophic obstacle to the development of large-scale quantum computers. The introduction of quantum error correction in 1995 showed that active techniques could be employed to mitigate this fatal problem. However, quantum error correction and fault-tolerant computation is now a much larger field and many new codes, techniques, and methodologies have been developed to implement error correction for large-scale quantum algorithms. In response, we have attempted to summarize the basic aspects of quantum error correction and fault-tolerance, not as a detailed guide, but rather as a basic introduction. The development in this area has been so pronounced that many in the field of quantum information, specifically researchers who are new to quantum information or people focused on the many other important issues in quantum computation, have found it difficult to keep up with the general formalisms and methodologies employed in this area. Rather than introducing these concepts from a rigorous mathematical and computer science framework, we instead examine error correction and fault-tolerance largely through detailed examples, which are more relevant to experimentalists today and in the near future.

  16. Adaptive error correction codes for face identification

    Science.gov (United States)

    Hussein, Wafaa R.; Sellahewa, Harin; Jassim, Sabah A.

    2012-06-01

    Face recognition in uncontrolled environments is greatly affected by fuzziness of face feature vectors as a result of extreme variation in recording conditions (e.g. illumination, poses or expressions) in different sessions. Many techniques have been developed to deal with these variations, resulting in improved performances. This paper aims to model template fuzziness as errors and investigate the use of error detection/correction techniques for face recognition in uncontrolled environments. Error correction codes (ECC) have recently been used for biometric key generation but not on biometric templates. We have investigated error patterns in binary face feature vectors extracted from different image windows of differing sizes and for different recording conditions. By estimating statistical parameters for the intra-class and inter-class distributions of Hamming distances in each window, we encode with appropriate ECC's. The proposed approached is tested for binarised wavelet templates using two face databases: Extended Yale-B and Yale. We shall demonstrate that using different combinations of BCH-based ECC's for different blocks and different recording conditions leads to in different accuracy rates, and that using ECC's results in significantly improved recognition results.

  17. An Illumination Correction ALgorithm on Landsat-TM Data

    Science.gov (United States)

    Tan, Bin; Wolfe, Robert; Masek, Jeffrey; Gao, Feng; Vermote, Eric F.

    2010-01-01

    In this paper, a new illumination correction model, the rotation model, is introduced. The model is based on the empirical correlation between reflectance and the illumination condition (IL). The model eliminates the dependency of reflectance on IL through rotating the data in IL-reflectance space. This model is compared with widely used cosine model and C model over a sample forest region. We found that the newly developed rotation model consistently performs best on both atmospheric uncorrected and corrected Landsat images. Index Terms Landsat, illumination correction, change detection, LEDAPS

  18. Self-Correcting HVAC Controls Project Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez, Nicholas; Brambley, Michael R.; Katipamula, Srinivas; Cho, Heejin; Goddard, James K.; Dinh, Liem H.

    2010-01-04

    This document represents the final project report for the Self-Correcting Heating, Ventilating and Air-Conditioning (HVAC) Controls Project jointly funded by Bonneville Power Administration (BPA) and the U.S. Department of Energy (DOE) Building Technologies Program (BTP). The project, initiated in October 2008, focused on exploratory initial development of self-correcting controls for selected HVAC components in air handlers. This report, along with the companion report documenting the algorithms developed, Self-Correcting HVAC Controls: Algorithms for Sensors and Dampers in Air-Handling Units (Fernandez et al. 2009), document the work performed and results of this project.

  19. LHCb: LHCb Software and Conditions Database Cross-Compatibility Tracking: a Graph-Theory Approach

    CERN Multimedia

    Cattaneo, M; Shapoval, I

    2012-01-01

    The Conditions Database (CondDB) of the LHCb experiment provides versioned, time dependent geometry and conditions data or all LHCb data processing applications (simulation, high level trigger, reconstruction, analysis). The evolution of CondDB and of the LHCb applications is a weakly-homomorphic process. It means that compatibility between a CondDB state and LHCb application state may not be preserved across different database and application generations. More over, a CondDB state by itself belongs to a complex three-dimensional phase space which evolves according to certain CondDB self-compatibility criteria, so it is sometimes difficult even to determine a self-consistent CondDB state. These compatibility issues may lead to various kinds of problems in the LHCb production, varying from unexpected application crashes to incorrect data processing results. Thus, there is a need for defining a well-established set of compatibility criteria between mentioned above entities, together with developing a compatibil...

  20. Mitral Valve Repair: The French Correction Versus the American Correction.

    Science.gov (United States)

    Schubert, Sarah A; Mehaffey, James H; Charles, Eric J; Kron, Irving L

    2017-08-01

    Degenerative mitral valve disease causing mitral regurgitation is the most common organic valve pathology and is classified based on leaflet motion. The "French correction" mitral valve repair method restores normal valvular anatomy with extensive leaflet resection, chordal manipulation, and rigid annuloplasty. The American correction attempts to restore normal valve function through minimal leaflet resection, flexible annuloplasty, and use of artificial chordae. These differing methods of mitral valve repair reflect an evolution in principles, but both require understanding of the valve pathology and correction of leaflet prolapse and annular dilatation. Adhering to those unifying principles and ensuring that no patient leaves the operating room with significant persistent mitral regurgitation produces durable results and satisfactory patient outcomes. Copyright © 2017 Elsevier Inc. All rights reserved.

  1. Correction

    Directory of Open Access Journals (Sweden)

    Laergaard Simon

    1996-11-01

    Full Text Available In the paper Muhlenbergia cleefii sp.nov., a new grass from the high Andes of Colombia, Caldasia 17(82-85: 409-412. 1995, an orthographic error was unfortunately introduced and the epithet was speIled "cleefi" (except at one place in the general text.

  2. Correction.

    Science.gov (United States)

    2015-03-01

    In the January 2015 issue of Cyberpsychology, Behavior, and Social Networking (vol. 18, no. 1, pp. 3–7), the article "Individual Differences in Cyber Security Behaviors: An Examination of Who Is Sharing Passwords." by Prof. Monica Whitty et al., has an error in wording in the abstract. The sentence in question was originally printed as: Contrary to our hypotheses, we found older people and individuals who score high on self-monitoring were more likely to share passwords. It should read: Contrary to our hypotheses, we found younger people and individuals who score high on self-monitoring were more likely to share passwords. The authors wish to apologize for the error.

  3. Correction

    Science.gov (United States)

    1999-11-01

    Synsedimentary deformation in the Jurassic of southeastern Utah—A case of impact shaking? COMMENT Geology, v. 27, p. 661 (July 1999) The sentence on p. 661, first column, second paragraph, line one, should read: The 1600 m of Pennsylvania Paradox Formation is 75 90% salt in Arches National Park. The sentence on p. 661, second column, third paragraph, line seven, should read: This high-pressured ydrothermal solution created the clastic dikes, chert nodules from reprecipitated siliceous cement that have been called “siliceous impactites” (Kriens et al., 1997), and much of the present structure at Upheaval Dome by further faulting.

  4. Correction

    CERN Document Server

    2007-01-01

    From left to right: Luis, Carmen, Mario, Christian and José listening to speeches by theorists Alvaro De Rújula and Luis Alvarez-Gaumé (right) at their farewell gathering on 15 May.We unfortunately cut out a part of the "Word of thanks" from the team retiring from Restaurant No. 1. The complete message is published below: Dear friends, You are the true "nucleus" of CERN. Every member of this extraordinary human mosaic will always remain in our affections and in our thoughts. We have all been very touched by your spontaneous generosity. Arrivederci, Mario Au revoir,Christian Hasta Siempre Carmen, José and Luis PS: Lots of love to the theory team and to the hidden organisers. So long!

  5. String-Corrected Black Holes

    Energy Technology Data Exchange (ETDEWEB)

    Hubeny, V.

    2005-01-12

    We investigate the geometry of four dimensional black hole solutions in the presence of stringy higher curvature corrections to the low energy effective action. For certain supersymmetric two charge black holes these corrections drastically alter the causal structure of the solution, converting seemingly pathological null singularities into timelike singularities hidden behind a finite area horizon. We establish, analytically and numerically, that the string-corrected two-charge black hole metric has the same Penrose diagram as the extremal four-charge black hole. The higher derivative terms lead to another dramatic effect--the gravitational force exerted by a black hole on an inertial observer is no longer purely attractive. The magnitude of this effect is related to the size of the compactification manifold.

  6. Should diastasis recti be corrected?

    Science.gov (United States)

    Nahas, F X; Augusto, S M; Ghelfond, C

    1997-01-01

    The plication of the anterior rectus sheath is a procedure that is performed by most surgeons during abdominoplasty. A main concern is whether the correction of recti diastasis is really effective and if it is stable. In order to verify the position of the rectus muscle, a CT-scan was used in 14 patients who underwent abdominoplasty with rectus plication to compare the preoperative situation of these muscles with their position 3 weeks and 6 months postoperatively. None of these patients had had previous abdominal surgery. The recti diastasis was corrected with a two-layer 2-0 Nylon suture. A dynamometer was used to measure the resistance force of the anterior aponeurosis of the rectus. In all cases the CT data shows that correction of the diastasis was achieved completely after 6 months.

  7. Delegation in Correctional Nursing Practice.

    Science.gov (United States)

    Tompkins, Frances

    2016-07-01

    Correctional nurses face daily challenges as a result of their work environment. Common challenges include availability of resources for appropriate care delivery, negotiating with custody staff for access to patients, adherence to scope of practice standards, and working with a varied staffing mix. Professional correctional nurses must consider the educational backgrounds and competency of other nurses and assistive personnel in planning for care delivery. Budgetary constraints and varied staff preparation can be a challenge for the professional nurse. Adequate care planning requires understanding the educational level and competency of licensed and unlicensed staff. Delegation is the process of assessing patient needs and transferring responsibility for care to appropriately educated and competent staff. Correctional nurses can benefit from increased knowledge about delegation. © The Author(s) 2016.

  8. "LEPTOP" electroweak corrections at LEP1

    CERN Document Server

    Novikov, V; Vysotsky, M I

    1995-01-01

    This work discusses parameters of the electroweak Lagrangian, coupling constants, the alpha Born approximation, W mass, Z mass, Z decays, one-loop electroweak corrections, electroweak corrections for the "gluon-free" observables, gluonic corrections to electroweak loops. (12 refs).

  9. Corrections in Montana: A Consultation on Corrections in Montana.

    Science.gov (United States)

    Montana State Advisory Committee to the U.S. Commission on Civil Rights, Helena.

    The findings and recommendations of a two-day conference on the civil and human rights of inmates of Montana's correctional institutions are contained in this report. The views of private citizens and experts from local, state, and federal organizations are presented in edited form under seven subject headings: existing prison reform legislation,…

  10. Automated general temperature correction method for dielectric soil moisture sensors

    Science.gov (United States)

    Kapilaratne, R. G. C. Jeewantinie; Lu, Minjiao

    2017-08-01

    An effective temperature correction method for dielectric sensors is important to ensure the accuracy of soil water content (SWC) measurements of local to regional-scale soil moisture monitoring networks. These networks are extensively using highly temperature sensitive dielectric sensors due to their low cost, ease of use and less power consumption. Yet there is no general temperature correction method for dielectric sensors, instead sensor or site dependent correction algorithms are employed. Such methods become ineffective at soil moisture monitoring networks with different sensor setups and those that cover diverse climatic conditions and soil types. This study attempted to develop a general temperature correction method for dielectric sensors which can be commonly used regardless of the differences in sensor type, climatic conditions and soil type without rainfall data. In this work an automated general temperature correction method was developed by adopting previously developed temperature correction algorithms using time domain reflectometry (TDR) measurements to ThetaProbe ML2X, Stevens Hydra probe II and Decagon Devices EC-TM sensor measurements. The rainy day effects removal procedure from SWC data was automated by incorporating a statistical inference technique with temperature correction algorithms. The temperature correction method was evaluated using 34 stations from the International Soil Moisture Monitoring Network and another nine stations from a local soil moisture monitoring network in Mongolia. Soil moisture monitoring networks used in this study cover four major climates and six major soil types. Results indicated that the automated temperature correction algorithms developed in this study can eliminate temperature effects from dielectric sensor measurements successfully even without on-site rainfall data. Furthermore, it has been found that actual daily average of SWC has been changed due to temperature effects of dielectric sensors with a

  11. Contact lens correction of presbyopia.

    Science.gov (United States)

    Morgan, Philip B; Efron, Nathan

    2009-08-01

    The ageing population highlights the need to provide effective optical solutions for presbyopic contact lens wearers. However, data gathered from annual contact lens fitting surveys demonstrate that fewer than 40% of contact lens wearers over 45 years of age (virtually all of whom can be presumed to suffer a partial or complete loss of accommodation) are prescribed a presbyopic correction. Furthermore, monovision is prescribed as frequently as multifocal lenses. These observations suggest that an optimal solution to the contact lens correction of presbyopia remains elusive.

  12. Is Feynman's Analysis of Electrostatic Screening Correct?

    CERN Document Server

    Subbarao, Kris

    2016-01-01

    In a recent paper on electrostatic shielding, Chapman, Hewett and Trefethen present arguments that the analysis of this effect by Feynman is incorrect. Feynman analyzed shielding by a row of infinitesimally thin wires. They claim that Feynman used the wrong boundary conditions invalidating his analysis. In this paper we emphasize that Feynman's solution is a Green's function through which behavior of the potential due to finite thickness wires of arbitrary cross-section with appropriate boundary condition can be understood. This shows that the main conclusions of Feynman's treatment are indeed correct. Analogy to a parallel plate capacitor with one of the plates replaced by a row of wires provides a more intuitive understanding of Feynman's argument. The case of a finite number of wires arranged in a ring (not treated by Feynman), as a model of Faraday cage, is different. The structure of the solution in radial coordinates already suggests that one should not expect exponential behavior and further analysis c...

  13. Quantum corrections to Drell-Yan production of Z bosons

    Energy Technology Data Exchange (ETDEWEB)

    Shcherbakova, Elena S.

    2011-08-15

    In this thesis, we present higher-order corrections to inclusive Z-boson hadroproduction via the Drell-Yan mechanism, h{sub 1}+h{sub 2}{yields}Z+X, at large transverse momentum (q{sub T}). Specifically, we include the QED, QCD and electroweak corrections of orders O({alpha}{sub S}{alpha}, {alpha}{sub S}{sup 2}{alpha}, {alpha}{sub S}{alpha}{sup 2}). We work in the framework of the Standard Model and adopt the MS scheme of renormalization and factorization. The cross section of Z-boson production has been precisely measured at various hadron-hadron colliders, including the Tevatron and the LHC. Our calculations will help to calibrate and monitor the luminosity and to estimate of backgrounds of the hadron-hadron interactions more reliably. Besides the total cross section, we study the distributions in the transverse momentum and the rapidity (y) of the Z boson, appropriate for Tevatron and LHC experimental conditions. Investigating the relative sizes fo the various types of corrections by means of the factor K = {sigma}{sub tot} / {sigma}{sub Born}, we find that the QCS corrections of order {alpha}{sub S}{sup 2}{alpha} are largest in general and that the electroweak corrections of order {alpha}{sub S}{alpha}{sup 2} play an important role at large values of q{sub T}, while the QED corrections at the same order are small, of order 2% or below. We also compare out results with the existing literature. We correct a few misprints in the original calculation of the QCD corrections, and find the published electroweak correction to be incomplete. Our results for the QED corrections are new. (orig.)

  14. Space Mapping and Defect Correction

    NARCIS (Netherlands)

    D. Echeverria (David); D.J.P. Lahaye (Domenico); P.W. Hemker (Piet); W.H.A. Schilders (Wil); H.A. van der Vorst (Henk); J. Rommes

    2008-01-01

    textabstractIn this chapter we present the principles of the space-mapping iteration techniques for the efficient solution of optimization problems. We also show how space-mapping optimization can be understood in the framework of defect correction. We observe the difference between the solution

  15. Space mapping and defect correction

    NARCIS (Netherlands)

    Echeverría, D.; Lahaye, D.; Hemker, P.W.; Schilders, W.H.A.; van der Vorst, H.A.; Rommes, J.

    2008-01-01

    In this chapter we present the principles of the space-mapping iteration techniques for the efficient solution of optimization problems. We also show how space-mapping optimization can be understood in the framework of defect correction. We observe the difference between the solution of the

  16. Political Correctness and American Academe.

    Science.gov (United States)

    Drucker, Peter F.

    1994-01-01

    Argues that today's political correctness atmosphere is a throwback to attempts made by the Nazis and Stalinists to force society into conformity. Academia, it is claimed, is being forced to conform to gain control of the institution of higher education. It is predicted that this effort will fail. (GR)

  17. author's correction 1..1

    Indian Academy of Sciences (India)

    Maria Angelica Ehara Watanabe, Sandra Odebrechet Vargas Nunes, Marla Karine Amarante, Roberta Losi Guembarovski,. Julie Massayo Maeda Oda, Kalil William Alves De Lima and Maria Helena Pelegrinelli Fungaro. J. Genet. 89, 179Y185. The correct spelling for coauthor 'Sandra Odebrechet Vargas Nunes' is 'Sandra ...

  18. Practical Reasoning in Corrections Education.

    Science.gov (United States)

    LaBar, C.; And Others

    1983-01-01

    The article explains the six tasks involved in practical reasoning and describes a research project that centered around teaching a six-week course in critical thinking to inmates at a medium security prison in an attempt to determine the feasibility of implementing a moral education program in correctional institutions. (SB)

  19. Quantum Correction of Fluctuation Theorem

    OpenAIRE

    Monnai, T.; Tasaki, S.

    2003-01-01

    Quantum analogues of the transient fluctuation theorem(TFT) and steady-state fluctuation theorem(SSFT) are investigated for a harmonic oscillator linearly coupled with a harmonic reservoir. The probability distribution for the work done externally is derived and quantum correction for TFT and SSFT are calculated.

  20. New Dimensions in Correctional Education.

    Science.gov (United States)

    Saam, Robert

    The Penitentiary of New Mexico (PNM) is currently offering the course, Report Writing for Officers, to teach correctional officers how to write better reports. This course focuses primarily on misconduct reports and supporting memos and touches upon the interdependence the course creates between the areas of treatment and security at PNM, helping…

  1. 75 FR 70951 - Notice, Correction

    Science.gov (United States)

    2010-11-19

    ... DISABILITY (NCD) Sunshine Act Meetings Notice, Correction Type: Quarterly Meeting. Summary: NCD published a.... FOR FURTHER INFORMATION CONTACT: Mark Quigley, Director of Communications, NCD, 1331 F Street, NW... Commission 9:30 a.m.-11:30 a.m. Continuation of NCD Open Meeting 11:30 a.m. Adjournment Dated: November 17...

  2. "Free Speech" and "Political Correctness"

    Science.gov (United States)

    Scott, Peter

    2016-01-01

    "Free speech" and "political correctness" are best seen not as opposing principles, but as part of a spectrum. Rather than attempting to establish some absolute principles, this essay identifies four trends that impact on this debate: (1) there are, and always have been, legitimate debates about the--absolute--beneficence of…

  3. Design correctness of digital systems

    NARCIS (Netherlands)

    Huijs, C.

    1998-01-01

    Transformational design is a formal technique directed at design correctness. It integrates design and verification by the use of pre-proven behaviour preserving transformations as design steps. A formal framework is necessary but hidden for the designer. Five formal aspects are integrated in the

  4. CORRECTIVE ACTION IN CAR MANUFACTURING

    Directory of Open Access Journals (Sweden)

    H. Rohne

    2012-01-01

    Full Text Available

    ENGLISH ABSTRACT: In this paper the important .issues involved in successfully implementing corrective action systems in quality management are discussed. The work is based on experience in implementing and operating such a system in an automotive manufacturing enterprise in South Africa. The core of a corrective action system is good documentation, supported by a computerised information system. Secondly, a systematic problem solving methodology is essential to resolve the quality related problems identified by the system. In the following paragraphs the general corrective action process is discussed and the elements of a corrective action system are identified, followed by a more detailed discussion of each element. Finally specific results from the application are discussed.

    AFRIKAANSE OPSOMMING: Belangrike oorwegings by die suksesvolle implementering van korrektiewe aksie stelsels in gehaltebestuur word in hierdie artikel bespreek. Die werk is gebaseer op ondervinding in die implementering en bedryf van so 'n stelsel by 'n motorvervaardiger in Suid Afrika. Die kern van 'n korrektiewe aksie stelsel is goeie dokumentering, gesteun deur 'n gerekenariseerde inligtingstelsel. Tweedens is 'n sistematiese probleemoplossings rnetodologie nodig om die gehalte verwante probleme wat die stelsel identifiseer aan te spreek. In die volgende paragrawe word die algemene korrektiewe aksie proses bespreek en die elemente van die korrektiewe aksie stelsel geidentifiseer. Elke element word dan in meer besonderhede bespreek. Ten slotte word spesifieke resultate van die toepassing kortliks behandel.

  5. Analyzing Further Predictors of Correctional Officer Professional Orientations.

    Science.gov (United States)

    Ferdik, Frank Valentino; Hills, Phillip

    2017-01-01

    Four professional orientations to which correctional officers can ascribe have been identified in extant literature, and they include the counseling roles, concern for corruption of authority, social distance, and punitive ideologies. Studies have generally found officer demographics and correctional working conditions to be significant predictors of these orientations. No study to date, however, has examined the predictive influence of officer voluntary resignation intentions. Linear regression equations using questionnaire data from a statewide population of maximum security correctional officers ( N = 649) were therefore estimated to explore whether officer desires to terminate their employment accounted for variance in their self-reported orientations. Stronger turnover intentions shared statistically significant associations with three orientations, including negatively predicting the counseling roles and positively predicting the punitive ideology. Implications for correctional policy are addressed.

  6. On the computational assessment of white matter hyperintensity progression: difficulties in method selection and bias field correction performance on images with significant white matter pathology

    Energy Technology Data Exchange (ETDEWEB)

    Valdes Hernandez, Maria del C.; Gonzalez-Castro, Victor; Wang, Xin; Doubal, Fergus; Munoz Maniega, Susana; Wardlaw, Joanna M. [Centre for Clinical Brian Sciences, Department of Neuroimaging Sciences, Edinburgh (United Kingdom); Ghandour, Dina T. [University of Edinburgh, College of Medicine and Veterinary Medicine, Edinburgh (United Kingdom); Armitage, Paul A. [University of Sheffield, Department of Cardiovascular Sciences, Sheffield (United Kingdom)

    2016-05-15

    Subtle inhomogeneities in the scanner's magnetic fields (B{sub 0} and B{sub 1}) alter the intensity levels of the structural magnetic resonance imaging (MRI) affecting the volumetric assessment of WMH changes. Here, we investigate the influence that (1) correcting the images for the B{sub 1} inhomogeneities (i.e. bias field correction (BFC)) and (2) selection of the WMH change assessment method can have on longitudinal analyses of WMH progression and discuss possible solutions. We used brain structural MRI from 46 mild stroke patients scanned at stroke onset and 3 years later. We tested three BFC approaches: FSL-FAST, N4 and exponentially entropy-driven homomorphic unsharp masking (E{sup 2}D-HUM) and analysed their effect on the measured WMH change. Separately, we tested two methods to assess WMH changes: measuring WMH volumes independently at both time points semi-automatically (MCMxxxVI) and subtracting intensity-normalised FLAIR images at both time points following image gamma correction. We then combined the BFC with the computational method that performed best across the whole sample to assess WMH changes. Analysis of the difference in the variance-to-mean intensity ratio in normal tissue between BFC and uncorrected images and visual inspection showed that all BFC methods altered the WMH appearance and distribution, but FSL-FAST in general performed more consistently across the sample and MRI modalities. The WMH volume change over 3 years obtained with MCMxxxVI with vs. without FSL-FAST BFC did not significantly differ (medians(IQR)(with BFC) = 3.2(6.3) vs. 2.9(7.4)ml (without BFC), p = 0.5), but both differed significantly from the WMH volume change obtained from subtracting post-processed FLAIR images (without BFC)(7.6(8.2)ml, p < 0.001). This latter method considerably inflated the WMH volume change as subtle WMH at baseline that became more intense at follow-up were counted as increase in the volumetric change. Measurement of WMH volume change remains

  7. COD Correction at the PF and PF-AR by New Orbit Feedback Scheme

    CERN Document Server

    Harada, Kentaro; Obina, Takashi; Sakai, Hiroshi; Takaki, Hiroyuki

    2005-01-01

    The eigen-vector method with a constraint condition is a new COD correction method that enables us to combine the local orbit correction at the insertion devices with the global COD correction by integrating the local one into the global one as the constraint condition using the Lagrange's undetermined multiplier method. In order to achieve this method, we only use the new contrived response matrix for the global COD correction where the local correction is involved and done simultaneously. We have tested this correction scheme at the PF ring and the PF-AR. In the machine studies, the new orbit correction method is successfully demonstrated. The RMS COD of the constraint BPMs are sufficiently suppressed and, on the other hand, there is almost no large difference in the RMS COD of all the other BPMs between the new and ordinary methods.

  8. Correcting ligands, metabolites, and pathways

    Directory of Open Access Journals (Sweden)

    Vriend Gert

    2006-11-01

    Full Text Available Abstract Background A wide range of research areas in bioinformatics, molecular biology and medicinal chemistry require precise chemical structure information about molecules and reactions, e.g. drug design, ligand docking, metabolic network reconstruction, and systems biology. Most available databases, however, treat chemical structures more as illustrations than as a datafield in its own right. Lack of chemical accuracy impedes progress in the areas mentioned above. We present a database of metabolites called BioMeta that augments the existing pathway databases by explicitly assessing the validity, correctness, and completeness of chemical structure and reaction information. Description The main bulk of the data in BioMeta were obtained from the KEGG Ligand database. We developed a tool for chemical structure validation which assesses the chemical validity and stereochemical completeness of a molecule description. The validation tool was used to examine the compounds in BioMeta, showing that a relatively small number of compounds had an incorrect constitution (connectivity only, not considering stereochemistry and that a considerable number (about one third had incomplete or even incorrect stereochemistry. We made a large effort to correct the errors and to complete the structural descriptions. A total of 1468 structures were corrected and/or completed. We also established the reaction balance of the reactions in BioMeta and corrected 55% of the unbalanced (stoichiometrically incorrect reactions in an automatic procedure. The BioMeta database was implemented in PostgreSQL and provided with a web-based interface. Conclusion We demonstrate that the validation of metabolite structures and reactions is a feasible and worthwhile undertaking, and that the validation results can be used to trigger corrections and improvements to BioMeta, our metabolite database. BioMeta provides some tools for rational drug design, reaction searches, and

  9. Correctional Staff Training Institutes. Final Report.

    Science.gov (United States)

    Southern Illinois Univ., East St. Louis, Center for the Study of Crime, Delinquency and Corrections.

    Three national institutes for correctional staff trainers incorporated new techniques in an attempt to upgrade corrections programs through improved staff development. There were 78 trainer and 200 middle management staff and correctional officers involved in the program, representing more than 100 correctional institutions in the United States.…

  10. Interaction and Self-Correction

    Directory of Open Access Journals (Sweden)

    Glenda Lucila Satne

    2014-07-01

    Full Text Available In this paper I address the question of how to account for the normative dimension involved in conceptual competence in a naturalistic framework. First, I present what I call the Naturalist Challenge (NC, referring to both the phylogenetic and ontogenetic dimensions of conceptual possession and acquisition. I then criticize two models that have been dominant in thinking about conceptual competence, the interpretationist and the causalist models. Both fail to meet NC, by failing to account for the abilities involved in conceptual self-correction. I then offer an alternative account of self-correction that I develop with the help of the interactionist theory of mutual understanding arising from recent developments in Phenomenology and Developmental Psychology.

  11. EPS Young Physicist Prize - CORRECTION

    CERN Multimedia

    2009-01-01

    The original text for the article 'Prizes aplenty in Krakow' in Bulletin 30-31 assigned the award of the EPS HEPP Young Physicist Prize to Maurizio Pierini. In fact he shared the prize with Niki Saoulidou of Fermilab, who was rewarded for her contribution to neutrino physics, as the article now correctly indicates. We apologise for not having named Niki Saoulidou in the original article.

  12. Corrective camouflage in pediatric dermatology.

    Science.gov (United States)

    Tedeschi, Aurora; Dall'Oglio, Federica; Micali, Giuseppe; Schwartz, Robert A; Janniger, Camila K

    2007-02-01

    Many dermatologic diseases, including vitiligo and other pigmentary disorders, vascular malformations, acne, and disfiguring scars from surgery or trauma, can be distressing to pediatric patients and can cause psychological alterations such as depression, loss of self-esteem, deterioration of quality of life, emotional distress, and, in some cases, body dysmorphic disorder. Corrective camouflage can help cover cutaneous unaesthetic disorders using a variety of water-resistant and light to very opaque products that provide effective and natural coverage. These products also can serve as concealers during medical treatment or after surgical procedures before healing is complete. Between May 2001 and July 2003. corrective camouflage was used on 15 children and adolescents (age range, 7-16 years; mean age, 14 years). The majority of patients were girls. Six patients had acne vulgaris; 4 had vitiligo; 2 had Becker nevus; and 1 each had striae distensae, allergic contact dermatitis. and postsurgical scarring. Parents of all patients were satisfied with the cosmetic cover results. We consider corrective makeup to be a well-received and valid adjunctive therapy for use during traditional long-term treatment and as a therapeutic alternative in patients in whom conventional therapy is ineffective.

  13. An overview of correctional psychiatry.

    Science.gov (United States)

    Metzner, Jeffrey; Dvoskin, Joel

    2006-09-01

    Supermax facilities may be an unfortunate and unpleasant necessity in modern corrections. Because of the serious dangers posed by prison gangs, they are unlikely to disappear completely from the correctional landscape any time soon. But such units should be carefully reserved for those inmates who pose the most serious danger to the prison environment. Further, the constitutional duty to provide medical and mental health care does not end at the supermax door. There is a great deal of common ground between the opponents of such environments and those who view them as a necessity. No one should want these expensive beds to be used for people who could be more therapeutically and safely managed in mental health treatment environments. No one should want people with serious mental illnesses to be punished for their symptoms. Finally, no one wants these units to make people more, instead of less, dangerous. It is in everyone's interests to learn as much as possible about the potential of these units for good and for harm. Corrections is a profession, and professions base their practices on data. If we are to avoid the most egregious and harmful effects of supermax confinement, we need to understand them far better than we currently do. Though there is a role for advocacy from those supporting or opposed to such environments, there is also a need for objective, scientifically rigorous study of these units and the people who live there.

  14. SPECT deadtime count loss correction using monitor source method

    Directory of Open Access Journals (Sweden)

    Wendy Siman

    2014-03-01

    Full Text Available Purpose: Deadtime-count-loss (DTloss correction using monitor source (MS requires: 1 uniform fractional DTloss across FOV, 2 high statistics MS images both with & without the object. The aims are validating condition 1 and developing a practical protocol that satisfies conditions 2 with minimal additional study duration.Methods and Materials: SPECT images of non-uniform phantoms (4GBq 99mTc along with MS (20MBq 99mTc attached to each detector were acquired multiple times over 48 hours in photopeak and scatter energy window (EW using Siemens-SymbiaS and GE-D670. Planar images of the MS alone were acquired. Photopeak counts for the MS ROIs were > 100kcts. Fractional DTloss uniformity across the FOV was evaluated by correlating count rates in different ROIs on projection images at different DTloss levels. The correction factor for each SPECT projection at every time point was calculated as the ratio of time-corrected MS count rates with & without the phantom.The DTloss-corrected projections for each SPECT acquisition were decay corrected to one time point. The correction accuracy was assessed against DTloss estimated by paralyzable model. The accuracy of projection-based DTloss correction for SPECT was evaluated. A method to model projection DTloss based on a subset of measured projection DTloss was investigated. The relation of DTloss between photopeak and scatter EW was explored.Results: The fractional DTloss was uniform across the FOV (r > 0.99, validating condition 1. The MS method was accurate to > 99% for planar and SPECT. Measured DTloss from 3-to-5 projections/detector may be used to estimate DTloss with accuracy > 98% for all SPECT projections by modeling DTloss with measured projection rate. The correction factor in photopeak and scatter EW are equivalent with > 99% agreement.Conclusion: MS method can accurately correct planar and SPECT DTloss. Sparse sampling of the projection DTloss allows acquiring MS counts with high statistics with

  15. Corrected Feedback: A Procedure to Enhance Recall of Informed Consent to Research among Substance Abusing Offenders.

    Science.gov (United States)

    Festinger, David S; Dugosh, Karen L; Croft, Jason R; Arabia, Patricia L; Marlowe, Douglas B

    2010-01-01

    This study examined the efficacy of corrected feedback for improving consent recall throughout the course of an ongoing longitudinal study. Participants (N = 135) were randomly assigned to either a corrected feedback or a no-feedback control condition. Participants completed a consent quiz 2-weeks after consenting to the host study and at months 1, 2, and 3. The corrected feedback group received corrections to erroneous responses and the no-feedback control group did not. The feedback group displayed significantly greater recall overall and in specific content areas (i.e., procedures, protections, risks/benefits). Results support the use of corrected feedback for improving consent recall.

  16. Adaptive correction of ensemble forecasts

    Science.gov (United States)

    Pelosi, Anna; Battista Chirico, Giovanni; Van den Bergh, Joris; Vannitsem, Stephane

    2017-04-01

    Forecasts from numerical weather prediction (NWP) models often suffer from both systematic and non-systematic errors. These are present in both deterministic and ensemble forecasts, and originate from various sources such as model error and subgrid variability. Statistical post-processing techniques can partly remove such errors, which is particularly important when NWP outputs concerning surface weather variables are employed for site specific applications. Many different post-processing techniques have been developed. For deterministic forecasts, adaptive methods such as the Kalman filter are often used, which sequentially post-process the forecasts by continuously updating the correction parameters as new ground observations become available. These methods are especially valuable when long training data sets do not exist. For ensemble forecasts, well-known techniques are ensemble model output statistics (EMOS), and so-called "member-by-member" approaches (MBM). Here, we introduce a new adaptive post-processing technique for ensemble predictions. The proposed method is a sequential Kalman filtering technique that fully exploits the information content of the ensemble. One correction equation is retrieved and applied to all members, however the parameters of the regression equations are retrieved by exploiting the second order statistics of the forecast ensemble. We compare our new method with two other techniques: a simple method that makes use of a running bias correction of the ensemble mean, and an MBM post-processing approach that rescales the ensemble mean and spread, based on minimization of the Continuous Ranked Probability Score (CRPS). We perform a verification study for the region of Campania in southern Italy. We use two years (2014-2015) of daily meteorological observations of 2-meter temperature and 10-meter wind speed from 18 ground-based automatic weather stations distributed across the region, comparing them with the corresponding COSMO

  17. On the Computation of Correctly Rounded Sums

    DEFF Research Database (Denmark)

    Kornerup, Peter; Lefevre, Vincent; Louvet, Nicolas

    2012-01-01

    algorithm introduced by Knuth is minimal, both in terms of number of operations and depth of the dependency graph. We investigate the possible use of another algorithm, Dekker's Fast2Sum algorithm, in radix-10 arithmetic. We give methods for computing, in radix 10, the floating-point number nearest...... the average value of two floating-point numbers. We also prove that under reasonable conditions, an algorithm performing only round-to-nearest additions/subtractions cannot compute the round-to-nearest sum of at least three floating-point numbers. Starting from an algorithm due to Boldo and Melquiond, we also...... present new results about the computation of the correctly-rounded sum of three floating-point numbers. For a few of our algorithms, we assume new operations defined by the recent IEEE 754-2008 Standard are available....

  18. Can small field diode correction factors be applied universally?

    Science.gov (United States)

    Liu, Paul Z Y; Suchowerska, Natalka; McKenzie, David R

    2014-09-01

    Diode detectors are commonly used in dosimetry, but have been reported to over-respond in small fields. Diode correction factors have been reported in the literature. The purpose of this study is to determine whether correction factors for a given diode type can be universally applied over a range of irradiation conditions including beams of different qualities. A mathematical relation of diode over-response as a function of the field size was developed using previously published experimental data in which diodes were compared to an air core scintillation dosimeter. Correction factors calculated from the mathematical relation were then compared those available in the literature. The mathematical relation established between diode over-response and the field size was found to predict the measured diode correction factors for fields between 5 and 30 mm in width. The average deviation between measured and predicted over-response was 0.32% for IBA SFD and PTW Type E diodes. Diode over-response was found to be not strongly dependent on the type of linac, the method of collimation or the measurement depth. The mathematical relation was found to agree with published diode correction factors derived from Monte Carlo simulations and measurements, indicating that correction factors are robust in their transportability between different radiation beams. Copyright © 2014. Published by Elsevier Ireland Ltd.

  19. [Plastic Surgical Correction of Buried Penis].

    Science.gov (United States)

    Boliglowa, Dominik Krzysztof; Ryu, Seung-Min; Ebrahim, Tarek; Menke, Henrik

    2017-04-01

    A "buried penis" causes functional problems and embarrassment. In the past, this complex condition was only seen in extremely overweight patients or as a result of severe inflammations in this region. More recently, this problem has also been observed in patients with massive weight loss following bariatric surgery. In these patients there is an abundance of extremely flaccid skin in the suprapubic region, which covers the penis and causes it to "disappear". This leads to balanitis and, in turn, further retraction of the penis. The only solution to this condition is a sophisticated surgical approach in 3 phases: At first, suprapubic tissues must be lifted. Secondly, the penis must be completely denuded and debrided and the correct penopubic/penoscrotal angles must be reconstructed. The last phase includes a strainless coverage of the remaining defect of the penis. This condition has not been widely described in the literature. The general incidence and prevalence in the postbariatric population is unknown, probably due to patients' embarrassment and lack of knowledge on the physicians' end. Nevertheless, the buried penis can be successfully exposed through careful, structured surgical treatment and an interdisciplinary approach between plastic surgeons and urologists. © Georg Thieme Verlag KG Stuttgart · New York.

  20. Correcting Experience-Based Judgments: The Perseverance of Subjective Experience in the Face of the Correction of Judgment

    Science.gov (United States)

    Nussinson, Ravit; Koriat, Asher

    2008-01-01

    Many of our cognitive and metacognitive judgments are based on sheer subjective experience. Subjective experience, however, may be contaminated by irrelevant factors, resulting in biased judgments. Under certain conditions people exert a metacognitive correction process to remedy such biased judgments. In this study we examine the proposition that…

  1. One-stage surgical correction of proximal hypospadias.

    Science.gov (United States)

    Joseph, V T

    2003-01-01

    Proximal hypospadias poses major problems in surgical correction owing to the complexity and severity of the abnormalities, leading to the use of staged repairs to correct this condition. However, with precise definition of the components of this deformity a single-stage operation can be developed and applied successfully for surgical correction of this condition. Twenty-six patients with severe proximal hypospadias were subjected to a one-stage repair. Excision of proximal fibrotic dartos tissue and removal of dysplastic urethral plate tissue corrected chordee completely. Urethral reconstruction was then performed by tubularising a flap of dorso-lateral preputial skin which was then anastomosed to the proximal urethra. The glandular part of the urethra was reconstructed using the distal part of the flap as an onlay graft over the meatal groove. The suture lines were covered with a layer of dartos tissue and skin closure was completed by transposing dorsal skin to surface the ventral penile shaft. A urethral catheter was left in for 10 days. All patients have been followed up after surgery from 1 to 5 years with a median period of 2 years. There were no fistulas. Two patients had mild stenosis at the meatus which responded to dilatation. One patient developed a stricture at the proximal anastomosis which required secondary correction. All other patients achieved satisfactory correction, both in terms of voiding and in the cosmetic appearance of the genitalia. Single-stage repair of hypospadias can be successfully applied in the correction of severe proximal hypospadias. It requires meticulous dissection and careful design of reconstructive techniques. The end results are comparable to staged procedures and morbidity is significantly lower.

  2. Correction of gene expression data

    DEFF Research Database (Denmark)

    Darbani Shirvanehdeh, Behrooz; Stewart, C. Neal, Jr.; Noeparvar, Shahin

    2014-01-01

    This report investigates for the first time the potential inter-treatment bias source of cell number for gene expression studies. Cell-number bias can affect gene expression analysis when comparing samples with unequal total cellular RNA content or with different RNA extraction efficiencies....... For maximal reliability of analysis, therefore, comparisons should be performed at the cellular level. This could be accomplished using an appropriate correction method that can detect and remove the inter-treatment bias for cell-number. Based on inter-treatment variations of reference genes, we introduce...

  3. Correct Linearization of Einstein's Equations

    Directory of Open Access Journals (Sweden)

    Rabounski D.

    2006-06-01

    Full Text Available Regularly Einstein's equations can be reduced to a wave form (linearly dependent from the second derivatives of the space metric in the absence of gravitation, the space rotation and Christoffel's symbols. As shown here, the origin of the problem is that one uses the general covariant theory of measurement. Here the wave form of Einstein's equations is obtained in the terms of Zelmanov's chronometric invariants (physically observable projections on the observer's time line and spatial section. The obtained equations depend on solely the second derivatives even if gravitation, the space rotation and Christoffel's symbols. The correct linearization proves: the Einstein equations are completely compatible with weak waves of the metric.

  4. Corrective Action Plan for Corrective Action Unit 407: Roller Coaster RADSAFE Area, Tonopah Test Range, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    T. M. Fitzmaurice

    2000-05-01

    This Corrective Action Plan (CAP) has been prepared for the Roller Coaster RADSAFE Area Corrective Action Unit 407 in accordance with the Federal Facility and Consent Order (Nevada Division of Environmental Protection [NDEP] et al., 1996). This CAP provides the methodology for implementing the approved Corrective Action Alternative as listed in the Corrective Action Decision Document (U.S. Department of Energy, Nevada Operations Office, 1999). The RCRSA was used during May and June of 1963 to decontaminate vehicles, equipment, and personnel from the Clean Slate tests. The Constituents of Concern (COCs) identified during the site characterization include plutonium, uranium, and americium. No other COCS were identified. The following closure actions will be implemented under this plan: (1) Remove and dispose of surface soils which are over three times background for the area. Soils identified for removal will be disposed of at an approved disposal facility. Excavated areas will be backfilled with clean borrow soil fi-om a nearby location. (2) An engineered cover will be constructed over the waste disposal pit area where subsurface COCS will remain. (3) Upon completion of the closure and approval of the Closure Report by NDEP, administrative controls, use restrictions, and site postings will be used to prevent intrusive activities at the site. Barbed wire fencing will be installed along the perimeter of this unit. Post closure monitoring will consist of site inspections to determine the condition of the engineered cover. Any identified maintenance and repair requirements will be remedied within 90 working days of discovery and documented in writing at the time of repair. Results of all inspections/repairs for a given year will be addressed in a single report submitted annually to the NDEP.

  5. Self-Correction and the Monitor: Percent of Errors Corrected of Those Attempted vs. Percent Corrected of All Errors Made.

    Science.gov (United States)

    Krashen, Stephen D.

    1994-01-01

    Green and Hecht's (1992, 1993) data are consistent with the Monitor hypothesis, and their findings match Krashen's (1982) report: self-correction (SC) has only a modest overall effect. Their subjects' high accuracy of attempted corrections could be the result of subjects' limiting SC to easily correctable items. (Contains 10 references.) (Author)

  6. Corrections to holographic entanglement plateau

    Science.gov (United States)

    Chen, Bin; Li, Zhibin; Zhang, Jia-ju

    2017-09-01

    We investigate the robustness of the Araki-Lieb inequality in a two-dimensional (2D) conformal field theory (CFT) on torus. The inequality requires that Δ S = S( L) - | S( L - ℓ) - S( ℓ)| is nonnegative, where S( L) is the thermal entropy and S( L - ℓ), S( ℓ) are the entanglement entropies. Holographically there is an entanglement plateau in the BTZ black hole background, which means that there exists a critical length such that when ℓ ≤ ℓ c the inequality saturates Δ S =0. In thermal AdS background, the holographic entanglement entropy leads to Δ S = 0 for arbitrary ℓ. We compute the next-to-leading order contributions to Δ S in the large central charge CFT at both high and low temperatures. In both cases we show that Δ S is strictly positive except for ℓ = 0 or ℓ = L. This turns out to be true for any 2D CFT. In calculating the single interval entanglement entropy in a thermal state, we develop new techniques to simplify the computation. At a high temperature, we ignore the finite size correction such that the problem is related to the entanglement entropy of double intervals on a complex plane. As a result, we show that the leading contribution from a primary module takes a universal form. At a low temperature, we show that the leading thermal correction to the entanglement entropy from a primary module does not take a universal form, depending on the details of the theory.

  7. Is non-attenuation-corrected PET inferior to body attenuation-corrected PET or PET/CT in lung cancer?

    Energy Technology Data Exchange (ETDEWEB)

    Maintas, Dimitris [CMN, Hopital Pneumocardiologique de Lyon, 69394 Lyon Cedex (France)]. E-mail: maintas@otenet.gr; Houzard, Claire [CMN, Hopital Pneumocardiologique de Lyon, 69394 Lyon Cedex (France); Ksyar, Rachid [CMN, Hopital Pneumocardiologique de Lyon, 69394 Lyon Cedex (France); Mognetti, Thomas [Anticancer Center Leon Berard, Nuclear Medicine Department, Lyon (France); Maintas, Catherine [Institute of Isotopic Studies, Distomou 5-7, Maroussi (Greece); Scheiber, Christian [CMN, Hopital Pneumocardiologique de Lyon, 69394 Lyon Cedex (France); Itti, Roland [CMN, Hopital Pneumocardiologique de Lyon, 69394 Lyon Cedex (France)

    2006-12-20

    It is considered that one of the great strengths of PET imaging is the ability to correct for body attenuation. This enables better lesion uptake quantification and quality of PET images. The aim of this work is to compare the sensitivity of non-attenuation-corrected (NAC) PET images, the gamma photons (GPAC) and CT attenuation-corrected (CTAC) images in detecting and staging of lung cancer. We have studied 66 patients undergoing PET/CT examinations for detecting and staging NSC lung cancer. The patients were injected with 18-FDG; 5 MBq/kg under fasting conditions and examination was started 60 min later. Transmission data were acquired by a spiral CT X-ray tube and by gamma photons emitting Cs-137l source and were used for the patient body attenuation correction without correction for respiratory motion. In 55 of 66 patients we performed both attenuation correction procedures and in 11 patients only CT attenuation correction. In seven patients with solitary nodules PET was negative and in 59 patients with lung cancer PET/CT was positive for pulmonary or other localization. In the group of 55 patients we found 165 areas of focal increased 18-FDG uptake in NAC, 165 in CTAC and 164 in GPAC PET images.In the patients with only CTAC we found 58 areas of increased 18-FDG uptake on NAC and 58 areas lesions on CTAC. In the patients with positive PET we found 223 areas of focal increased uptake in NAC and 223 areas in CTAC images. The sensitivity of NAC was equal to the sensitivity of CTAC and GPAC images. The visualization of peripheral lesions was better in NAC images and the lesions were better localized in attenuation-corrected images. In three lesions of the thorax the localization was better in GPAC and fused images than in CTAC images.

  8. 78 FR 76193 - Special Notice; Correction

    Science.gov (United States)

    2013-12-16

    ... AFFAIRS Special Notice; Correction AGENCY: National Cemetery Administration, Department of Veterans... Collection Activity: (The Presidential Memorial Certificate) Proposed Collection; Comment Request On page 69176, under Title paragraph, please correct to read: Presidential Memorial Certificate. On page 69176...

  9. Personality Patterns Among Correctional Officer Applicants

    Science.gov (United States)

    Holland, Terrill R.; And Others

    1976-01-01

    The MMPI profiles of 359 correctional officer applicants were cluster analyzed, which resulted in the identification of five relatively homogeneous subgroups. The implications of the findings for occupationally adaptive and maladaptive correctional officer behavior were discussed. (Editor)

  10. Effective Correctional Treatment: Bibliotherapy for Cynics.

    Science.gov (United States)

    Gendreau, Paul; Ross, Bob

    1979-01-01

    Presents recent evidence, obtained from a review of the literature on correctional treatment published since 1973, appealing the verdict that correctional rehabilitation is ineffective. There are several types of intervention programs that have proved successful with offender populations. (Author)

  11. Chimerical conditionals

    Directory of Open Access Journals (Sweden)

    Itamar Francez

    2015-01-01

    Full Text Available This paper introduces and analyzes chimerical conditionals, a class of conditionals that are puzzling vis-à-vis the distinction between so-called 'biscuit' and hypothetical conditionals. An analysis of this distinction is developed which draws on the pragmatic account of Franke 2009. Building on this analysis, chimericity is then shown to derive from a systematic ambiguity of a definite and often implicit argument in the consequent of chimerical conditionals, between a rigid designator and an individual concept reading. This ambiguity is argued to arise from different ways in which context can resolve familiarity presuppositions. One consequence of the inquiry is that the notion of (independence employed in much work on conditionals cannot be viewed as a relation between propositions, but must be made sensitive to the dynamics of information flow. http://dx.doi.org/10.3765/sp.8.2 BibTeX info

  12. Band extension in digital methods of transfer function determination – signal conditioners asymmetry error corrections

    Directory of Open Access Journals (Sweden)

    Zbigniew Staroszczyk

    2014-12-01

    Full Text Available [b]Abstract[/b]. In the paper, the calibrating method for error correction in transfer function determination with the use of DSP has been proposed. The correction limits/eliminates influence of transfer function input/output signal conditioners on the estimated transfer functions in the investigated object. The method exploits frequency domain conditioning paths descriptor found during training observation made on the known reference object.[b]Keywords[/b]: transfer function, band extension, error correction, phase errors

  13. Survey of Radar Refraction Error Corrections

    Science.gov (United States)

    2016-11-01

    ELECTRONIC TRAJECTORY MEASUREMENTS GROUP RCC 266-16 SURVEY OF RADAR REFRACTION ERROR CORRECTIONS DISTRIBUTION A: Approved for...DOCUMENT 266-16 SURVEY OF RADAR REFRACTION ERROR CORRECTIONS November 2016 Prepared by Electronic...This page intentionally left blank. Survey of Radar Refraction Error Corrections, RCC 266-16 iii Table of Contents Preface

  14. Parsing Schemata and Correctness of Parsing Algorithms

    NARCIS (Netherlands)

    Sikkel, Nicolaas

    1998-01-01

    Parsing schemata give a high-level formal description of parsers. These can be used, among others, as an intermediate level of abstraction for deriving the formal correctness of a parser. A parser is correct if it duly implements a parsing schema that is known to be correct. We discuss how the

  15. Radiative corrections in bumblebee electrodynamics

    Directory of Open Access Journals (Sweden)

    R.V. Maluf

    2015-10-01

    Full Text Available We investigate some quantum features of the bumblebee electrodynamics in flat spacetimes. The bumblebee field is a vector field that leads to a spontaneous Lorentz symmetry breaking. For a smooth quadratic potential, the massless excitation (Nambu–Goldstone boson can be identified as the photon, transversal to the vacuum expectation value of the bumblebee field. Besides, there is a massive excitation associated with the longitudinal mode and whose presence leads to instability in the spectrum of the theory. By using the principal-value prescription, we show that no one-loop radiative corrections to the mass term is generated. Moreover, the bumblebee self-energy is not transverse, showing that the propagation of the longitudinal mode cannot be excluded from the effective theory.

  16. Correct Linearization of Einstein's Equations

    Directory of Open Access Journals (Sweden)

    Rabounski D.

    2006-04-01

    Full Text Available Routinely, Einstein’s equations are be reduced to a wave form (linearly independent of the second derivatives of the space metric in the absence of gravitation, the space rotation and Christoffel’s symbols. As shown herein, the origin of the problem is the use of the general covariant theory of measurement. Herein the wave form of Einstein’s equations is obtained in terms of Zelmanov’s chronometric invariants (physically observable projections on the observer’s time line and spatial section. The equations so obtained depend solely upon the second derivatives, even for gravitation, the space rotation and Christoffel’s symbols. The correct linearization proves that the Einstein equations are completely compatible with weak waves of the metric.

  17. Inflation from nilpotent Kaehler corrections

    Energy Technology Data Exchange (ETDEWEB)

    McDonough, Evan [McGill Univ. Montreal, QC (Canada); Scalisi, Marco [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

    2016-09-15

    We develop a new class of supergravity cosmological models where inflation is induced by terms in the Kaehler potential which mix a nilpotent superfield S with a chiral sector Φ. As the new terms are non-(anti)holomorphic, and hence cannot be removed by a Kaehler transformation, these models are intrinsically Kaehler potential driven. Such terms could arise for example due to a backreaction of an anti-D3 brane on the string theory bulk geometry. We show that this mechanism is very general and allows for a unified description of inflation and dark energy, with controllable SUSY breaking at the vacuum. When the internal geometry of the bulk field is hyperbolic, we prove that small perturbative Kaehler corrections naturally lead to α-attractor behaviour, with inflationary predictions in excellent agreement with the latest Planck data.

  18. A quantum correction to chaos

    Energy Technology Data Exchange (ETDEWEB)

    Fitzpatrick, A. Liam [Department of Physics, Boston University,590 Commonwealth Avenue, Boston, MA 02215 (United States); Kaplan, Jared [Department of Physics and Astronomy, Johns Hopkins University,3400 N. Charles St, Baltimore, MD 21218 (United States)

    2016-05-12

    We use results on Virasoro conformal blocks to study chaotic dynamics in CFT{sub 2} at large central charge c. The Lyapunov exponent λ{sub L}, which is a diagnostic for the early onset of chaos, receives 1/c corrections that may be interpreted as λ{sub L}=((2π)/β)(1+(12/c)). However, out of time order correlators receive other equally important 1/c suppressed contributions that do not have such a simple interpretation. We revisit the proof of a bound on λ{sub L} that emerges at large c, focusing on CFT{sub 2} and explaining why our results do not conflict with the analysis leading to the bound. We also comment on relationships between chaos, scattering, causality, and bulk locality.

  19. Radiative corrections in bumblebee electrodynamics

    Energy Technology Data Exchange (ETDEWEB)

    Maluf, R.V., E-mail: r.v.maluf@fisica.ufc.br [Universidade Federal do Ceará (UFC), Departamento de Física, Campus do Pici, Fortaleza CE, CP 6030, 60455-760 (Brazil); Silva, J.E.G., E-mail: jgsilva@indiana.edu [Indiana University Center for Spacetime Symmetries, Bloomington, IN 47405 (United States); Almeida, C.A.S., E-mail: carlos@fisica.ufc.br [Universidade Federal do Ceará (UFC), Departamento de Física, Campus do Pici, Fortaleza CE, CP 6030, 60455-760 (Brazil)

    2015-10-07

    We investigate some quantum features of the bumblebee electrodynamics in flat spacetimes. The bumblebee field is a vector field that leads to a spontaneous Lorentz symmetry breaking. For a smooth quadratic potential, the massless excitation (Nambu–Goldstone boson) can be identified as the photon, transversal to the vacuum expectation value of the bumblebee field. Besides, there is a massive excitation associated with the longitudinal mode and whose presence leads to instability in the spectrum of the theory. By using the principal-value prescription, we show that no one-loop radiative corrections to the mass term is generated. Moreover, the bumblebee self-energy is not transverse, showing that the propagation of the longitudinal mode cannot be excluded from the effective theory.

  20. Static Correctness of Hierarchical Procedures

    DEFF Research Database (Denmark)

    Schwartzbach, Michael Ignatieff

    1990-01-01

    basis for a general type hierarchy with static type checking, which enables first-order polymorphism combined with multiple inheritance and specialization in a language with assignments. We extend the results to include opaque types. An opaque version of a type is different from the original but has......A system of hierarchical, fully recursive types in a truly imperative language allows program fragments written for small types to be reused for all larger types. To exploit this property to enable type-safe hierarchical procedures, it is necessary to impose a static requirement on procedure calls....... We introduce an example language and prove the existence of a sound requirement which preserves static correctness while allowing hierarchical procedures. This requirement is further shown to be optimal, in the sense that it imposes as few restrictions as possible. This establishes the theoretical...

  1. Pileup correction of microdosimetric spectra

    CERN Document Server

    Langen, K M; Lennox, A J; Kroc, T K; De Luca, P M

    2002-01-01

    Microdosimetric spectra were measured at the Fermilab neutron therapy facility using low pressure proportional counters operated in pulse mode. The neutron beam has a very low duty cycle (<0.1%) and consequently a high instantaneous dose rate which causes distortions of the microdosimetric spectra due to pulse pileup. The determination of undistorted spectra at this facility necessitated (i) the modified operation of the proton accelerator to reduce the instantaneous dose rate and (ii) the establishment of a computational procedure to correct the measured spectra for remaining pileup distortions. In support of the latter effort, two different pileup simulation algorithms using analytical and Monte-Carlo-based approaches were developed. While the analytical algorithm allows a detailed analysis of pileup processes it only treats two-pulse and three-pulse pileup and its validity is hence restricted. A Monte-Carlo-based pileup algorithm was developed that inherently treats all degrees of pileup. This algorithm...

  2. Binocular visual performance and summation after correcting higher order aberrations.

    Science.gov (United States)

    Sabesan, Ramkumar; Zheleznyak, Len; Yoon, Geunyoung

    2012-12-01

    Although the ocular higher order aberrations degrade the retinal image substantially, most studies have investigated their effect on vision only under monocular conditions. Here, we have investigated the impact of binocular higher order aberration correction on visual performance and binocular summation by constructing a binocular adaptive optics (AO) vision simulator. Binocular monochromatic aberration correction using AO improved visual acuity and contrast sensitivity significantly. The improvement however, differed from that achieved under monocular viewing. At high spatial frequency (24 c/deg), the monocular benefit in contrast sensitivity was significantly larger than the benefit achieved binocularly. In addition, binocular summation for higher spatial frequencies was the largest in the presence of subject's native higher order aberrations and was reduced when these aberrations were corrected. This study thus demonstrates the vast potential of binocular AO vision testing in understanding the impact of ocular optics on habitual binocular vision.

  3. Coordinating sentence composition with error correction: A multilevel analysis

    Directory of Open Access Journals (Sweden)

    Van Waes, L.

    2011-01-01

    Full Text Available Error analysis involves detecting and correcting discrepancies between the 'text produced so far' (TPSF and the writer's mental representation of what the text should be. While many factors determine the choice of strategy, cognitive effort is a major contributor to this choice. This research shows how cognitive effort during error analysis affects strategy choice and success as measured by a series of online text production measures. We hypothesize that error correction with speech recognition software differs from error correction with keyboard for two reasons. Speech produces auditory commands and, consequently, different error types. The study reported on here measured the effects of (1 mode of presentation (auditory or visual-tactile, (2 error span, whether the error spans more or less than two characters, and (3 lexicality, whether the text error comprises an existing word. A multilevel analysis was conducted to take into account the hierarchical nature of these data. For each variable (interference reaction time, preparation time, production time, immediacy of error correction, and accuracy of error correction, multilevel regression models are presented. As such, we take into account possible disturbing person characteristics while testing the effect of the different conditions and error types at the sentence level.The results show that writers delay error correction more often when the TPSF is read out aloud first. The auditory property of speech seems to free resources for the primary task of writing, i.e. text production. Moreover, the results show that large errors in the TPSF require more cognitive effort, and are solved with a higher accuracy than small errors. The latter also holds for the correction of small errors that result in non-existing words.

  4. Auto-correcting for atmospherical effects in thermal hyperspectral measurements

    Science.gov (United States)

    Timmermans, Joris; Buitrago-Acevedo, Maria; Verhoef, Wout

    2017-04-01

    Correct estimation of soil and vegetation thermal emissivity's has been of huge importance in remote sensing studies. Field measurements of the leaf/soil and canopy emissivity can lead to estimations of water content. Consequently several studies have been performed with the objective of identifying the spectral behavior of the emissivity. However such measurements provide additional challenges before any retrieval can successfully be performed. While in laboratory the influence of the atmospheric conditions can be controlled in field experiments this cannot be done. In most cases such atmospheric correction however requires detailed knowledge of the atmospheric constituents at the time of the measurements. The objective of this research was to create an auto-atmospherically correct thermal hyperspectral emissivity measurements for retrieving canopy water content. For this hyperspectral thermal measurements were obtained during ESAs REFLEX campaign in 2012 using a MIDAC FTIR radiometer. MODTRAN simulations were used to construct a simple quadratic radiative transfer model that couples atmospheric transmissivities to the different gas constituents. This model was afterwards used to estimate the concentrations of H20 (g) and CO2 (g). The radiative measurements were afterwards corrected for these gas absorptions. Finally a temperature emissivity separation was applied to estimate the emissivities of the different land surface components. Gas concentrations were validated against measurements of a LICOR 7500 taken in parallel to the MIDAC measurements. It is observed that in general the relative errors are around 25% of the LICOR measurements, which are in the same range as the instrumental errors of the eddy-covariance system (15-30%). The correction of the absorption features proved however more difficult and resulted in overestimations of the correction-terms; 1) because spectral collocation of the simulations with the observations proved troublesome, and 2 because

  5. Levenshtein error-correcting barcodes for multiplexed DNA sequencing.

    Science.gov (United States)

    Buschmann, Tilo; Bystrykh, Leonid V

    2013-09-11

    of recovering the new length of the corrupted codeword and of correcting on average more random mutations than traditional Levenshtein or Hamming codes.As part of this work we prepared software for the flexible generation of DNA codes based on our new approach. To adapt codes to specific experimental conditions, the user can customize sequence filtering, the number of correctable mutations and barcode length for highest performance.

  6. Levenshtein error-correcting barcodes for multiplexed DNA sequencing

    Science.gov (United States)

    2013-01-01

    method is additionally capable of recovering the new length of the corrupted codeword and of correcting on average more random mutations than traditional Levenshtein or Hamming codes. As part of this work we prepared software for the flexible generation of DNA codes based on our new approach. To adapt codes to specific experimental conditions, the user can customize sequence filtering, the number of correctable mutations and barcode length for highest performance. PMID:24021088

  7. The corrections to scaling within Mazenko's theory in the limit of low ...

    Indian Academy of Sciences (India)

    Abstract. We consider corrections to scaling within an approximate theory developed by Mazenko for nonconserved order parameter in the limit of low (d → 1) and high (d →. ∞) dimensions. The corrections to scaling considered here follows from the departures of the initial condition from the scaling morphology. Including ...

  8. Using Track Changes and Word Processor to Provide Corrective Feedback to Learners in Writing

    Science.gov (United States)

    AbuSeileek, A. F.

    2013-01-01

    This study investigated the effect of computer-mediated corrective feedback types in an English as a foreign language (EFL) intact class over time. The participants were 64 English majors who were assigned randomly into three treatment conditions that gave and received computer-mediated corrective feedback while writing (track changes, word…

  9. Generalized Second Law of Thermodynamics with Corrected Entropy in Tachyon Cosmology

    CERN Document Server

    Farajollahi, H; Shojaie, H; Abolghasemi, M

    2016-01-01

    This work is to study the generalized second law (GSL) of thermodynamics in tachyon cosmology where the boundary of the universe is assumed to be enclosed by a dynamical apparent horizon. The model is constrained with the observational data. The two logarithmic and power law corrected entropy is also discussed and conditions to validate the GSL and corrected entropies are obtained.

  10. Advanced hardware design for error correcting codes

    CERN Document Server

    Coussy, Philippe

    2015-01-01

    This book provides thorough coverage of error correcting techniques. It includes essential basic concepts and the latest advances on key topics in design, implementation, and optimization of hardware/software systems for error correction. The book’s chapters are written by internationally recognized experts in this field. Topics include evolution of error correction techniques, industrial user needs, architectures, and design approaches for the most advanced error correcting codes (Polar Codes, Non-Binary LDPC, Product Codes, etc). This book provides access to recent results, and is suitable for graduate students and researchers of mathematics, computer science, and engineering. • Examines how to optimize the architecture of hardware design for error correcting codes; • Presents error correction codes from theory to optimized architecture for the current and the next generation standards; • Provides coverage of industrial user needs advanced error correcting techniques.

  11. Atmospheric Error Correction of the Laser Beam Ranging

    Directory of Open Access Journals (Sweden)

    J. Saydi

    2014-01-01

    Full Text Available Atmospheric models based on surface measurements of pressure, temperature, and relative humidity have been used to increase the laser ranging accuracy by ray tracing. Atmospheric refraction can cause significant errors in laser ranging systems. Through the present research, the atmospheric effects on the laser beam were investigated by using the principles of laser ranging. Atmospheric correction was calculated for 0.532, 1.3, and 10.6 micron wavelengths through the weather conditions of Tehran, Isfahan, and Bushehr in Iran since March 2012 to March 2013. Through the present research the atmospheric correction was computed for meteorological data in base of monthly mean. Of course, the meteorological data were received from meteorological stations in Tehran, Isfahan, and Bushehr. Atmospheric correction was calculated for 11, 100, and 200 kilometers laser beam propagations under 30°, 60°, and 90° rising angles for each propagation. The results of the study showed that in the same months and beam emission angles, the atmospheric correction was most accurate for 10.6 micron wavelength. The laser ranging error was decreased by increasing the laser emission angle. The atmospheric correction with two Marini-Murray and Mendes-Pavlis models for 0.532 nm was compared.

  12. Corrective measures evaluation report for technical area-v groundwater.

    Energy Technology Data Exchange (ETDEWEB)

    Witt, Johnathan L (North Wind, Inc., Idaho Falls, ID); Orr, Brennon R. (North Wind, Inc., Idaho Falls, ID); Dettmers, Dana L. (North Wind, Inc., Idaho Falls, ID); Hall, Kevin A. (North Wind, Inc., Idaho Falls, ID); Howard, Hope (North Wind, Inc., Idaho Falls, ID)

    2005-07-01

    This Corrective Measures Evaluation Report was prepared as directed by the Compliance Order on Consent issued by the New Mexico Environment Department to document the process of selecting the preferred remedial alternative for contaminated groundwater at Technical Area V. Supporting information includes background information about the site conditions and potential receptors and an overview of work performed during the Corrective Measures Evaluation. Evaluation of remedial alternatives included identification and description of four remedial alternatives, an overview of the evaluation criteria and approach, qualitative and quantitative evaluation of remedial alternatives, and selection of the preferred remedial alternative. As a result of the Corrective Measures Evaluation, it was determined that monitored natural attenuation of all contaminants of concern (trichloroethene, tetrachloroethene, and nitrate) was the preferred remedial alternative for implementation as the corrective measure to remediate contaminated groundwater at Technical Area V of Sandia National Laboratories/New Mexico. Finally, design criteria to meet cleanup goals and objectives and the corrective measures implementation schedule for the preferred remedial alternative are presented.

  13. Pulse compressor with aberration correction

    Energy Technology Data Exchange (ETDEWEB)

    Mankos, Marian [Electron Optica, Inc., Palo Alto, CA (United States)

    2015-11-30

    In this SBIR project, Electron Optica, Inc. (EOI) is developing an electron mirror-based pulse compressor attachment to new and retrofitted dynamic transmission electron microscopes (DTEMs) and ultrafast electron diffraction (UED) cameras for improving the temporal resolution of these instruments from the characteristic range of a few picoseconds to a few nanoseconds and beyond, into the sub-100 femtosecond range. The improvement will enable electron microscopes and diffraction cameras to better resolve the dynamics of reactions in the areas of solid state physics, chemistry, and biology. EOI’s pulse compressor technology utilizes the combination of electron mirror optics and a magnetic beam separator to compress the electron pulse. The design exploits the symmetry inherent in reversing the electron trajectory in the mirror in order to compress the temporally broadened beam. This system also simultaneously corrects the chromatic and spherical aberration of the objective lens for improved spatial resolution. This correction will be found valuable as the source size is reduced with laser-triggered point source emitters. With such emitters, it might be possible to significantly reduce the illuminated area and carry out ultrafast diffraction experiments from small regions of the sample, e.g. from individual grains or nanoparticles. During phase I, EOI drafted a set of candidate pulse compressor architectures and evaluated the trade-offs between temporal resolution and electron bunch size to achieve the optimum design for two particular applications with market potential: increasing the temporal and spatial resolution of UEDs, and increasing the temporal and spatial resolution of DTEMs. Specialized software packages that have been developed by MEBS, Ltd. were used to calculate the electron optical properties of the key pulse compressor components: namely, the magnetic prism, the electron mirror, and the electron lenses. In the final step, these results were folded

  14. Hypernatremia: Correction Rate and Hemodialysis

    Directory of Open Access Journals (Sweden)

    Saima Nur

    2014-01-01

    Full Text Available Severe hypernatremia is defined as serum sodium levels above 152 mEq/L, with a mortality rate ≥60%. 85-year-old gentleman was brought to the emergency room with altered level of consciousness after refusing to eat for a week at a skilled nursing facility. On admission patient was nonverbal with stable vital signs and was responsive only to painful stimuli. Laboratory evaluation was significant for serum sodium of 188 mmol/L and water deficit of 12.0 L. Patient was admitted to medicine intensive care unit and after inadequate response to suboptimal fluid repletion, hemodialysis was used to correct hypernatremia. Within the first fourteen hours, sodium concentration only changed 1 mEq/L with a fluid repletion; however, the concentration dropped greater than 20 mEq/L within two hours during hemodialysis. Despite such a drastic drop in sodium concentration, patient did not develop any neurological sequela and was at baseline mental status at the time of discharge.

  15. Phase and birefringence aberration correction

    Science.gov (United States)

    Bowers, M.; Hankla, A.

    1996-07-09

    A Brillouin enhanced four wave mixing phase conjugate mirror corrects phase aberrations of a coherent electromagnetic beam and birefringence induced upon that beam. The stimulated Brillouin scattering (SBS) phase conjugation technique is augmented to include Brillouin enhanced four wave mixing (BEFWM). A seed beam is generated by a main oscillator which arrives at the phase conjugate cell before the signal beams in order to initiate the Brillouin effect. The signal beam which is being amplified through the amplifier chain is split into two perpendicularly polarized beams. One of the two beams is chosen to be the same polarization as some component of the seed beam, the other orthogonal to the first. The polarization of the orthogonal beam is then rotated 90{degree} such that it is parallel to the other signal beam. The three beams are then focused into cell containing a medium capable of Brillouin excitation. The two signal beams are focused such that they cross the seed beam path before their respective beam waists in order to achieve BEFWM or the two signal beams are focused to a point or points contained within the focused cone angle of the seed beam to achieve seeded SBS, and thus negate the effects of all birefringent and material aberrations in the system. 5 figs.

  16. Rulison Site corrective action report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-09-01

    Project Rulison was a joint US Atomic Energy Commission (AEC) and Austral Oil Company (Austral) experiment, conducted under the AEC`s Plowshare Program, to evaluate the feasibility of using a nuclear device to stimulate natural gas production in low-permeability gas-producing geologic formations. The experiment was conducted on September 10, 1969, and consisted of detonating a 40-kiloton nuclear device at a depth of 2,568 m below ground surface (BGS). This Corrective Action Report describes the cleanup of petroleum hydrocarbon- and heavy-metal-contaminated sediments from an old drilling effluent pond and characterization of the mud pits used during drilling of the R-EX well at the Rulison Site. The Rulison Site is located approximately 65 kilometers (40 miles) northeast of Grand Junction, Colorado. The effluent pond was used for the storage of drilling mud during drilling of the emplacement hole for the 1969 gas stimulation test conducted by the AEC. This report also describes the activities performed to determine whether contamination is present in mud pits used during the drilling of well R-EX, the gas production well drilled at the site to evaluate the effectiveness of the detonation in stimulating gas production. The investigation activities described in this report were conducted during the autumn of 1995, concurrent with the cleanup of the drilling effluent pond. This report describes the activities performed during the soil investigation and provides the analytical results for the samples collected during that investigation.

  17. Corrective Action Decision Document for Corrective Action Unit 340: Pesticide Release sites, Nevada Test Site, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    DOE/NV

    1998-12-08

    This Corrective Action Decision Document has been prepared for Corrective Action Unit 340, the NTS Pesticide Release Sites, in accordance with the Federal Facility Agreement and Consent Order of 1996 (FFACO, 1996). Corrective Action Unit 340 is located at the Nevada Test Site, Nevada, and is comprised of the following Corrective Action Sites: 23-21-01, Area 23 Quonset Hut 800 Pesticide Release Ditch; 23-18-03, Area 23 Skid Huts Pesticide Storage; and 15-18-02, Area 15 Quonset Hut 15-11 Pesticide Storage. The purpose of this Corrective Action Decision Document is to identify and provide a rationale for the selection of a recommended corrective action alternative for each Corrective Action Site. The scope of this Corrective Action Decision Document consists of the following tasks: Develop corrective action objectives; Identify corrective action alternative screening criteria; Develop corrective action alternatives; Perform detailed and comparative evaluations of the corrective action alternatives in relation to the corrective action objectives and screening criteria; and Recommend and justify a preferred corrective action alternative for each Corrective Action Site.

  18. Self-shading correction for oceanographic upwelling radiometers.

    Science.gov (United States)

    Leathers, Robert; Downes, Trijntje; Mobley, Cutris

    2004-10-04

    We present the derivation of an analytical model for the self-shading error of an oceanographic upwelling radiometer. The radiometer is assumed to be cylindrical and can either be a profiling instrument or include a wider cylindrical buoy for floating at the sea surface. The model treats both optically shallow and optically deep water conditions and can be applied any distance off the seafloor. We evaluate the model by comparing its results to those from Monte Carlo simulations. The analytical model performs well over a large range of environmental conditions and provides a significant improvement to previous analytical models. The model is intended for investigators who need to apply self-shading corrections to radiometer data but who do not have the ability to compute shading corrections with Monte Carlo simulations. The model also can provide guidance for instrument design and cruise planning.

  19. Model-Based Illumination Correction for Face Images in Uncontrolled Scenarios

    NARCIS (Netherlands)

    Boom, B.J.; Spreeuwers, Lieuwe Jan; Veldhuis, Raymond N.J.

    2009-01-01

    Face Recognition under uncontrolled illumination conditions is partly an unsolved problem. Several illumination correction methods have been proposed, but these are usually tested on illumination conditions created in a laboratory. Our focus is more on uncontrolled conditions. We use the Phong model

  20. Related Conditions

    Science.gov (United States)

    ... diseases; starting first with eczema, then followed by food allergy, asthma, and allergic rhinitis. Researchers don’t yet know whether the Atopic March conditions merely coexist in people with overactive immune systems, or ... with eczema and food allergy in early childhood. However, the diseases don’ ...

  1. Discharge simulations performed with a hydrological model using bias corrected regional climate model input

    Directory of Open Access Journals (Sweden)

    S. C. van Pelt

    2009-12-01

    Full Text Available Studies have demonstrated that precipitation on Northern Hemisphere mid-latitudes has increased in the last decades and that it is likely that this trend will continue. This will have an influence on discharge of the river Meuse. The use of bias correction methods is important when the effect of precipitation change on river discharge is studied. The objective of this paper is to investigate the effect of using two different bias correction methods on output from a Regional Climate Model (RCM simulation. In this study a Regional Atmospheric Climate Model (RACMO2 run is used, forced by ECHAM5/MPIOM under the condition of the SRES-A1B emission scenario, with a 25 km horizontal resolution. The RACMO2 runs contain a systematic precipitation bias on which two bias correction methods are applied. The first method corrects for the wet day fraction and wet day average (WD bias correction and the second method corrects for the mean and coefficient of variance (MV bias correction. The WD bias correction initially corrects well for the average, but it appears that too many successive precipitation days were removed with this correction. The second method performed less well on average bias correction, but the temporal precipitation pattern was better. Subsequently, the discharge was calculated by using RACMO2 output as forcing to the HBV-96 hydrological model. A large difference was found between the simulated discharge of the uncorrected RACMO2 run, the WD bias corrected run and the MV bias corrected run. These results show the importance of an appropriate bias correction.

  2. Motion correction in MRI of the brain

    Science.gov (United States)

    Godenschweger, F; Kägebein, U; Stucht, D; Yarach, U; Sciarra, A; Yakupov, R; Lüsebrink, F; Schulze, P; Speck, O

    2016-01-01

    Subject motion in MRI is a relevant problem in the daily clinical routine as well as in scientific studies. Since the beginning of clinical use of MRI, many research groups have developed methods to suppress or correct motion artefacts. This review focuses on rigid body motion correction of head and brain MRI and its application in diagnosis and research. It explains the sources and types of motion and related artefacts, classifies and describes existing techniques for motion detection, compensation and correction and lists established and experimental approaches. Retrospective motion correction modifies the MR image data during the reconstruction, while prospective motion correction performs an adaptive update of the data acquisition. Differences, benefits and drawbacks of different motion correction methods are discussed. PMID:26864183

  3. Quantum corrections to the string Bethe ansatz

    CERN Document Server

    Hernández, R; Hernandez, Rafael; Lopez, Esperanza

    2006-01-01

    One-loop corrections to the energy of semiclassical rotating strings contain both analytic and non-analytic terms in the 't Hooft coupling. Analytic contributions agree with the prediction from the string Bethe ansatz based on the classical S-matrix, but in order to include non-analytic contributions quantum corrections are required. We find a general expression for the first quantum correction to the string Bethe ansatz.

  4. Quantum corrections to Schwarzschild black hole

    Energy Technology Data Exchange (ETDEWEB)

    Calmet, Xavier; El-Menoufi, Basem Kamal [University of Sussex, Department of Physics and Astronomy, Brighton (United Kingdom)

    2017-04-15

    Using effective field theory techniques, we compute quantum corrections to spherically symmetric solutions of Einstein's gravity and focus in particular on the Schwarzschild black hole. Quantum modifications are covariantly encoded in a non-local effective action. We work to quadratic order in curvatures simultaneously taking local and non-local corrections into account. Looking for solutions perturbatively close to that of classical general relativity, we find that an eternal Schwarzschild black hole remains a solution and receives no quantum corrections up to this order in the curvature expansion. In contrast, the field of a massive star receives corrections which are fully determined by the effective field theory. (orig.)

  5. Revisiting corrective saccades: role of visual feedback

    Science.gov (United States)

    Tian, Jing; Ying, Howard S.; Zee, David S.

    2013-01-01

    To clarify the role of visual feedback in the generation of corrective movements after inaccurate primary saccades, we used a visually-triggered saccade task in which we varied how long the target was visible. The target was on for only 100 ms (OFF100ms), on until the start of the primary saccade (OFFonset) or on for 2 s (ON). We found that the tolerance for the post-saccadic error was small (− 2%) with a visual signal (ON) but greater (−6%) without visual feedback (OFF100ms). Saccades with an error of −10%, however, were likely to be followed by corrective saccades regardless of whether or not visual feedback was present. Corrective saccades were generally generated earlier when visual error information was available; their latency was related to the size of the error. The LATER (Linear Approach to Threshold with Ergodic Rate) model analysis also showed a comparable small population of short latency corrective saccades irrespective of the target visibility. Finally, we found, in the absence of visual feedback, the accuracy of corrective saccades across subjects was related to the latency of the primary saccade. Our findings provide new insights into the mechanisms underlying the programming of corrective saccades: 1) the preparation of corrective saccades begins along with the preparation of the primary saccades, 2) the accuracy of corrective saccades depends on the reaction time of the primary saccades and 3) if visual feedback is available after the initiation of the primary saccade, the prepared correction can be updated. PMID:23891705

  6. Wavelength and End Correction in a Recorder

    Directory of Open Access Journals (Sweden)

    Shuaihang (Susan Wang

    2009-01-01

    Full Text Available The wavelength and end correction was investigated as a function of the tube length of a recorder over a range of frequencies. It was found that the period of the sound produced varies linearly with the recorder’s tube length, as expected. It was also found that the end correction does not vary as a function of frequency. However, the end correction at the hole was found to be much greater than the end correction at the end of a resonating tube.

  7. Emissivity corrected pyrometry of reactive multilayers

    Science.gov (United States)

    Farrow, Darcie; Abere, Michael; Rupper, Stephen; Conwell, Thomas; Tappan, Alexander; Adams, David

    2017-06-01

    Ignition of sputter deposited nano-laminates results in rapid, self-propagating reactions. Due to high (10's of m/s) reaction front velocities, temperatures in the 1,000's of °K, and rapid phase changes occurring during reaction, direct measurement of temperature has proven difficult. This work presents a pyrometry technique with sub-microsecond time resolution, 10-6 m spatial resolution, and real time calculation of emissivity. By modulating a laser at 100 kHz and then Fourier processing the summed signal of emission and modulated reflectance, this emissivity corrected pyrometer overcomes the traditional limitations of two-color pyrometery for samples that do not follow the grey body approximation. The instrument has allowed for the direct measurement of temperature in NiAl and AlPt flame fronts, which allows for a determination of heat loss from an adiabatic condition. Further, a bilayer thickness dependence study has shown the relationship between front propagation velocity and flame temperature. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.

  8. Mammographic image enhancement using wavelet transform and homomorphic filter

    OpenAIRE

    Majidi, F.; Latif, A. M.; J. Malakouti; H Kasayi

    2015-01-01

    Mammography is the most effective method for the early diagnosis of breast cancer diseases. As mammographic images contain low signal to noise ratio and low contrast, it becomes too difficult for radiologists to analyze mammogram. To deal with the above stated problems, it is very important to enhance the mammographic images using image processing methods. This paper introduces a new image enhancement approach for mammographic images which uses the modified mathematical morphology, wavelet tr...

  9. Minimizing Overhead for Secure Computation and Fully Homomorphic Encryption: Overhead

    Science.gov (United States)

    2015-11-01

    there is now a potential “randomness-dependent” issue since the simulators generate certificates about their own behaviour in earlier communication...communication applications. 1 Introduction As the world moves towards pervasive computing and communication, devices from vehicles to dog collars will soon

  10. A Framework For Efficient Homomorphic Universally Composable Commitments

    DEFF Research Database (Denmark)

    David, Bernardo Machado

    Commitment schemes are a fundamental primitive in modern cryptography, serving as a building block for a myriad of complex protocols and applications. Universally composable commitment schemes are of particular interest, since they can be seamlessly combined with other universally composable...

  11. SIPHER: Scalable Implementation of Primitives for Homomorphic Encryption

    Science.gov (United States)

    2015-11-01

    and passed on to the design group, iterating back and forth as improvements are found. The third thrust area is in highly parallelized...Each research thrust was generally six months behind the progress of the one before it. Figure 4 shows a timeline of the various milestones of the...immediate that this kernel is an ideal; furthermore, it is invariant under the choice of representative i from the coset i〈p〉, because hip (r) = hi(r)p

  12. Additively Homomorphic UC commitments with Optimal Amortized Overhead

    DEFF Research Database (Denmark)

    Cascudo Pueyo, Ignacio; Damgård, Ivan Bjerre; David, Bernardo Machado

    2015-01-01

    We propose the first UC secure commitment scheme with (amortized) computational complexity linear in the size of the string committed to. After a preprocessing phase based on oblivious transfer, that only needs to be done once and for all, our scheme only requires a pseudorandom generator and a l......, our basic scheme has amortised concrete efficiency comparable with previous protocols in the Random Oracle Model even though it is constructed in the plain model....

  13. Exposing Objects under Light Cloud Cover by Adaptive Homomorphic Filtering.

    Science.gov (United States)

    1982-01-06

    U’.S. (;overnment agencies. The views and conclusions contained in this do-ument are those of the contrat or and should not be interpreted as ne...The Stochastic Iterative Approach 16 3.2 The Deterministic Adaptive Approach 20 3.3 Filter Design 24 4. EXPERIMENTAL RESULTS 28 4.1 Stochastic Approach... modification of this it- 17 eration where rather than filtering the original cloudy image on each iteration we filter the updated signal estimate (i.e

  14. Generating Private Recommendations Efficiently Using Homomorphic Encryption and Data Packing

    DEFF Research Database (Denmark)

    Erkin, Zekeriya; Veugen, Thijs; Toft, Tomas

    2012-01-01

    Recommender systems have become an important tool for personalization of online services. Generating recommendations in online services depends on privacy-sensitive data collected from the users. Traditional data protection mechanisms focus on access control and secure transmission, which provide...... security only against malicious third parties, but not the service provider. This creates a serious privacy risk for the users. In this paper, we aim to protect the private data against the service provider while preserving the functionality of the system. We propose encrypting private data and processing...

  15. A Privacy-Preserving GWAS Computation with Homomorphic Encryption

    NARCIS (Netherlands)

    Ugwuoke, C.I.; Erkin, Z.; Lagendijk, R.L.

    2016-01-01

    The continuous decline in the cost of DNA sequencing has contributed both
    positive and negative feelings in the academia and research community. It has
    now become possible to harvest large amounts of genetic data, which researches believe their study will help improve preventive and

  16. Privacy-Preserving Content-Based Recommendations through Homomorphic Encryption

    NARCIS (Netherlands)

    Erkin, Z.; Beye, M.; Veugen, P.J.M.; Lagendijk, R.L.

    2012-01-01

    By offering personalized content to users, recommender systems have become a vital tool in ecommerce and online media applications. Content-based algorithms recommend items or products to users, that are most similar to those previously purchased or consumed. Unfortunately, collecting and storing

  17. Volume sums of polar Blaschke–Minkowski homomorphisms

    Indian Academy of Sciences (India)

    L) and. V (K + L)1/n ≥ V (K)1/n + V (L)1/n. In each case, equality holds if and only if K and L are homothetic. Here, + denotes the usual Minkowski sum and V1(K, L) denotes the mixed volume of the convex bodies K and L defined by. V1(K, L) =.

  18. Modeling of phase equilibria with CPA using the homomorph approach

    DEFF Research Database (Denmark)

    Breil, Martin Peter; Tsivintzelis, Ioannis; Kontogeorgis, Georgios

    2011-01-01

    For association models, like CPA and SAFT, a classical approach is often used for estimating pure-compound and mixture parameters. According to this approach, the pure-compound parameters are estimated from vapor pressure and liquid density data. Then, the binary interaction parameters, kij, are ...

  19. Generating private recommendations efficiently using homomorphic encryption and data packing

    NARCIS (Netherlands)

    Erkin, Z.; Veugen, P.J.M.; Toft, T.; Lagendijk, R.L.

    2012-01-01

    Recommender systems have become an important tool for personalization of online services. Generating recommendations in online services depends on privacy-sensitive data collected from the users. Traditional data protection mechanisms focus on access control and secure transmission, which provide

  20. Generating Private Recommendations Efficiently Using Homomorphic Encryption and Data Packing

    NARCIS (Netherlands)

    Erkin, Zekeriya; Erkin, Zekeriya; Veugen, Thijs; Toft, Tomas; Lagendijk, Reginald L.

    Recommender systems have become an important tool for personalization of online services. Generating recommendations in online services depends on privacy-sensitive data collected from the users. Traditional data protection mechanisms focus on access control and secure transmission, which provide

  1. Advanced Homomorphic Encryption its Applications and Derivatives (AHEAD)

    Science.gov (United States)

    2013-09-01

    outputs an at- tempted forgery (µ∗, σ∗). The forger’s advantage Advsu-scmaSIG (F) is the probability that Ver(vk, µ∗, σ∗) accepts and (µ∗, σ∗) 6= (µ(i), σ...distinguish between two types of forger F : one that produces a forgery on an unqueried message (a violation of standard existential unforgeability), and...least δ/2−negl(n), F outputs a forgery (µ∗,v∗) where µ∗ is different from all the queried messages, Aµ∗v∗ = u, and ‖v∗‖ ≤ s · √ m. Furthermore

  2. Professional burnout syndrome among correctional facility officers.

    Science.gov (United States)

    Harizanova, Stanislava N; Tarnovska, Tanya H

    2013-01-01

    Correctional facilities present unique work places--the employees there work in tough, demanding and hazardous working conditions, in real life-threatening environment, subjected to physical and mental fatigue, risk of infectious diseases, work in shifts, with inadequate pay, etc. The aim of this study was to find the prevalence and level of burnout syndrome among employees working in the District Prison of the town of Plovdiv. The study included all employees that had direct contact with the inmates in the prison. We recruited 106 employees that participated in the study anonymously and voluntarily. The main instrument we used was the questionnaire designed according to the methods developed by V. Boiko, which allows identification of professional burnout syndrome in its three phases with four symptoms in each of the phases. We found a high prevalence of burnout syndrome among the staff in the District Prison in Plovdiv (74.53%). All three phases of burnout were found to have a high prevalence rate--the stress phase: 48.11%, the resistance phase: 66.98%, the exhaustion phase: 41.51%. The rank in the service hierarchy was found to be a predictor in the stress phase, B = 0.701, p = 0.048, Exp(B) = 2.106, 95%CI [1.00; 4.04]. The single officers (83.33% of the divorced and 55.56% of the single employees) and those of the staff that were more highly educated (78.72%) had elevated levels of burnout syndrome, and these manifested during the first 5 years of their service in the prison (77.78%). In Bulgaria at present the burnout syndrome has not been studied among employees working in correctional facilities. We found a high prevalence of the syndrome among the employees of the District Prison - Plovdiv. The younger, the single and the more educated employees had greater levels of burnout syndrome, which manifest during the first 5 years of their service. The results suggest that there is a need to develop and implement effective strategies to reduce and prevent

  3. Green's functions for Neumann boundary conditions

    OpenAIRE

    Franklin, Jerrold

    2012-01-01

    Green's functions for Neumann boundary conditions have been considered in Math Physics and Electromagnetism textbooks, but special constraints and other properties required for Neumann boundary conditions have generally not been noticed or treated correctly. In this paper, we derive an appropriate Neumann Green's function with these constraints and properties incorporated.

  4. Publisher Correction: Invisible Trojan-horse attack

    DEFF Research Database (Denmark)

    Sajeed, Shihan; Minshull, Carter; Jain, Nitin

    2017-01-01

    A correction to this article has been published and is linked from the HTML version of this paper. The error has been fixed in the paper.......A correction to this article has been published and is linked from the HTML version of this paper. The error has been fixed in the paper....

  5. 21 CFR 120.10 - Corrective actions.

    Science.gov (United States)

    2010-04-01

    ... CONSUMPTION HAZARD ANALYSIS AND CRITICAL CONTROL POINT (HACCP) SYSTEMS General Provisions § 120.10 Corrective... develop written corrective action plans, which become part of their HACCP plans in accordance with § 120.8... have been trained in accordance with § 120.13, to determine whether modification of the HACCP plan is...

  6. 21 CFR 123.7 - Corrective actions.

    Science.gov (United States)

    2010-04-01

    ... of their HACCP plans in accordance with § 123.6(c)(5), by which they predetermine the corrective... in accordance with § 123.10, to determine whether the HACCP plan needs to be modified to reduce the risk of recurrence of the deviation, and modify the HACCP plan as necessary. (d) All corrective actions...

  7. 9 CFR 417.3 - Corrective actions.

    Science.gov (United States)

    2010-01-01

    ... ANALYSIS AND CRITICAL CONTROL POINT (HACCP) SYSTEMS § 417.3 Corrective actions. (a) The written HACCP plan.... The HACCP plan shall describe the corrective action to be taken, and assign responsibility for taking... identified deviation or other unforeseen hazard should be incorporated into the HACCP plan. (c) All...

  8. FISICO: Fast Image SegmentatIon COrrection.

    Directory of Open Access Journals (Sweden)

    Waldo Valenzuela

    Full Text Available In clinical diagnosis, medical image segmentation plays a key role in the analysis of pathological regions. Despite advances in automatic and semi-automatic segmentation techniques, time-effective correction tools are commonly needed to improve segmentation results. Therefore, these tools must provide faster corrections with a lower number of interactions, and a user-independent solution to reduce the time frame between image acquisition and diagnosis.We present a new interactive method for correcting image segmentations. Our method provides 3D shape corrections through 2D interactions. This approach enables an intuitive and natural corrections of 3D segmentation results. The developed method has been implemented into a software tool and has been evaluated for the task of lumbar muscle and knee joint segmentations from MR images.Experimental results show that full segmentation corrections could be performed within an average correction time of 5.5±3.3 minutes and an average of 56.5±33.1 user interactions, while maintaining the quality of the final segmentation result within an average Dice coefficient of 0.92±0.02 for both anatomies. In addition, for users with different levels of expertise, our method yields a correction time and number of interaction decrease from 38±19.2 minutes to 6.4±4.3 minutes, and 339±157.1 to 67.7±39.6 interactions, respectively.

  9. 34 CFR 200.42 - Corrective action.

    Science.gov (United States)

    2010-07-01

    ... Programs Operated by Local Educational Agencies Lea and School Improvement § 200.42 Corrective action. (a... school on— (A) Revising the school improvement plan developed under § 200.41 to address the specific... corrective action; and (B) Implementing the revised improvement plan. (v) Extend for that school the length...

  10. A Hybrid Approach for Correcting Grammatical Errors

    Science.gov (United States)

    Lee, Kiyoung; Kwon, Oh-Woog; Kim, Young-Kil; Lee, Yunkeun

    2015-01-01

    This paper presents a hybrid approach for correcting grammatical errors in the sentences uttered by Korean learners of English. The error correction system plays an important role in GenieTutor, which is a dialogue-based English learning system designed to teach English to Korean students. During the talk with GenieTutor, grammatical error…

  11. Correcting Poor Posture without Awareness or Willpower

    Science.gov (United States)

    Wernik, Uri

    2012-01-01

    In this article, a new technique for correcting poor posture is presented. Rather than intentionally increasing awareness or mobilizing willpower to correct posture, this approach offers a game using randomly drawn cards with easy daily assignments. A case using the technique is presented to emphasize the subjective experience of living with poor…

  12. Correction of errors in power measurements

    DEFF Research Database (Denmark)

    Pedersen, Knud Ole Helgesen

    1998-01-01

    Small errors in voltage and current measuring transformers cause inaccuracies in power measurements.In this report correction factors are derived to compensate for such errors.......Small errors in voltage and current measuring transformers cause inaccuracies in power measurements.In this report correction factors are derived to compensate for such errors....

  13. 77 FR 43111 - Indian Gaming; Correction

    Science.gov (United States)

    2012-07-23

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF THE INTERIOR Bureau of Indian Affairs Indian Gaming; Correction AGENCY: Bureau of Indian Affairs, Interior. ACTION: Notice of Approved Tribal--State Class III Gaming Compact; Correction. SUMMARY: The Bureau of Indian...

  14. Radiative corrections to vector boson masses

    NARCIS (Netherlands)

    Veltman, M.J.G.

    1980-01-01

    Weak and e.m. radiative corrections to vector boson masses are computed. Including corrections due to the presently known leptons and quarks, mass shifts of+3080 and +3310 MeV are obtained for the masses of the charged and neutral vector boson.

  15. Correctional Officers' Attitudes toward Selected Treatment Programs.

    Science.gov (United States)

    Teske, Raymond H. C.; Williamson, Harold E.

    1979-01-01

    Examined the attitudes of a sample of correctional officers toward selected treatment programs. Besides a number of factors which correlated with positive attitudes toward treatment, several factors correlated negatively, including number of years of service and a belief that the primary function of corrections is punishment. (Author)

  16. A refined tip correction based on decambering

    DEFF Research Database (Denmark)

    Sørensen, Jens Nørkær; Dag, Kaya Onur; Ramos García, Néstor

    2016-01-01

    A new tip correction for use in performance codes based on the blade element momentum (BEM) or the lifting-line techniqueis presented. The correction modifies the circulation by taking into account the additional influence of the inductionof the vortices in the wake, using the so-called decamberi...

  17. Surface tension and long range corrections of cylindrical interfaces.

    Science.gov (United States)

    Bourasseau, E; Malfreyt, P; Ghoufi, A

    2015-12-21

    The calculation of the surface tension of curved interfaces has been deeply investigated from molecular simulation during this last past decade. Recently, the thermodynamic Test-Area (TA) approach has been extended to the calculation of surface tension of curved interfaces. In the case of the cylindrical vapour-liquid interfaces of water and Lennard-Jones fluids, it was shown that the surface tension was independent of the curvature of the interface. In addition, the surface tension of the cylindrical interface is higher than that of the planar interface. Molecular simulations of cylindrical interfaces have been so far performed (i) by using a shifted potential, (ii) by means of large cutoff without periodic boundary conditions, or (iii) by ignoring the long range corrections to the surface tension due to the difficulty to estimate them. Indeed, unlike the planar interfaces there are no available operational expressions to consider the tail corrections to the surface tension of cylindrical interfaces. We propose here to develop the long range corrections of the surface tension for cylindrical interfaces by using the non-exponential TA (TA2) method. We also extend the formulation of the Mecke-Winkelmann corrections initially developed for planar surfaces to cylindrical interfaces. We complete this study by the calculation of the surface tension of cylindrical surfaces of liquid tin and copper using the embedded atom model potentials.

  18. Minocycline Protects against Neurologic Complications of Rapid Correction of Hyponatremia

    Science.gov (United States)

    Soupart, Alain; Pochet, Roland; Brion, Jean Pierre

    2010-01-01

    Osmotic demyelination syndrome is a devastating neurologic condition that occurs after rapid correction of serum sodium in patients with hyponatremia. Pathologic features of this injury include a well-demarcated region of myelin loss, a breakdown of the blood–brain barrier, and infiltration of microglia. The semisynthetic tetracycline minocycline is protective in some animal models of central nervous system injury, including demyelination, suggesting that it may also protect against demyelination resulting from rapid correction of chronic hyponatremia. Using a rat model of osmotic demyelination syndrome, we found that treatment with minocycline significantly decreases brain demyelination, alleviates neurologic manifestations, and reduces mortality associated with rapid correction of hyponatremia. Mechanistically, minocycline decreased the permeability of the blood–brain barrier, inhibited microglial activation, decreased both the expression of IL1α and protein nitrosylation, and reduced the loss of GFAP immunoreactivity. In conclusion, minocycline modifies the course of osmotic demyelination in rats, suggesting its possible therapeutic use in the setting of inadvertent rapid correction of chronic hyponatremia in humans. PMID:21051736

  19. Effective object planes for aberration-corrected transmission electron microscopy

    Energy Technology Data Exchange (ETDEWEB)

    Yu, R., E-mail: ryu@tsinghua.edu.cn [Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China); Lentzen, M. [Institute of Solid State Research and Ernst Ruska Centre, Research Centre Juelich, 52425 Juelich (Germany); Zhu, J. [Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China)

    2012-01-15

    In aberration-corrected transmission electron microscopy, the image contrast depends sensitively on the focus value. With the point resolution extended to an information limit of below 0.1 nm, even a focus change of as small as one nanometer could give a significant change in image contrast. Therefore, it is necessary to consider in detail the optimum focus condition in order to take full advantage of aberration-correction. In this study, the thickness dependence of the minimum contrast focus has been investigated by dynamical image simulations for amorphous model structures of carbon, germanium, and tungsten, which were constructed by molecular dynamics simulations. The calculation results show that the minimum contrast focus varies with the object thickness, supporting the use of an effective object plane close to the midplane instead of the exit plane of a sample, as suggested by Bonhomme and Beorchia [J. Phys. D: Appl. Phys. 16, 705 (1983)] and Lentzen [Microscopy and Microanalysis 12, 191 (2006)]. Thus supported particles and wedge-shaped crystals with symmetrical top and bottom surfaces could be imaged at a focus condition independent of the uneven bottom face. Image simulations of crystalline samples as a function of focus and thickness show: for an object thickness of less than 10 nm, the optimum focus condition is matched better if the midplane of the object, instead of the exit plane, is chosen as reference plane. -- Highlights: Black-Right-Pointing-Pointer Stringent focus condition is required for aberration-corrected TEM. Black-Right-Pointing-Pointer Optimum focus should be set with respect to the midplane of a sample. Black-Right-Pointing-Pointer The focus condition could be independent of the lateral position on a wedged sample.

  20. Early symptomatic presbyopes--what correction modality works best?

    Science.gov (United States)

    Woods, Jill; Woods, Craig A; Fonn, Desmond

    2009-09-01

    To compare the performance of a low-addition silicone hydrogel multifocal soft lens with other soft lens correction options in a group of habitual soft lens wearers of distance correction who are symptomatic of early presbyopia. This clinical study was designed as a prospective, double-masked, randomized, crossover, dispensing trial consisting of four 1-week phases, one for each of the correction modalities: a low-addition silicone hydrogel multifocal soft lens, monovision, habitual correction, and optimized distance visual correction. The prescriptions of all modalities were finalized at a single fitting visit, and the lenses were worn according to a randomized schedule. All lenses were made from lotrafilcon B material. A series of objective vision tests were conducted: high- and low-contrast LogMAR under high- and low-room lighting conditions, stereopsis, and critical print size. A number of other data collection methods used were novel: some data were collected under controlled laboratory-based conditions and others under "real-world" conditions, some of which were completed on a BlackBerry hand-held communication device. All participants were able to be fit with all four correction modalities. Objective vision tests showed no statistical difference between the lens modalities except in the case of low-contrast near LogMAR acuity under low-lighting levels where monovision (+0.29 +/- 0.10) performed better than the multifocal (+0.33 +/- 0.11, P=0.027) and the habitual (+0.37 +/- 0.12, Pvs. 84.2 +/- 23.7, P=0.05), at nighttime (88.8 +/- 11.7 vs. 74.9 +/- 23.6, P=0.001), any associated haloes or glare (92.0 +/- 10.6 vs. 78.0 +/- 22.8, P=0.003), and observing road signs (90.1 +/- 11.8 vs. 79.4 +/- 20.2, P=0.027). Preference for the multifocal compared with monovision was also reported when watching television (95.0 +/- 6.4 vs. 82.6 +/- 20.1, P=0.001) and when changing focus from distance to near (87.0 +/- 13.4 vs. 66.1 +/- 32.2, Preading, using a computer, watching

  1. NLO Corrections to the Photon Impact Factor: Combining Real and Virtual Corrections

    OpenAIRE

    Bartels, J; Colferai, D.; Gieseke, Stefan; Kyrieleis, A.

    2002-01-01

    In this third part of our calculation of the QCD NLO corrections to the photon impact factor we combine our previous results for the real corrections with the singular pieces of the virtual corrections and present finite analytic expressions for the quark-antiquark-gluon intermediate state inside the photon impact factor. We begin with a list of the infrared singular pieces of the virtual correction, obtained in the first step of our program. We then list the complete result...

  2. The correction of eye blink artefacts in the EEG: a comparison of two prominent methods.

    Directory of Open Access Journals (Sweden)

    Sven Hoffmann

    Full Text Available BACKGROUND: The study investigated the residual impact of eyeblinks on the electroencephalogram (EEG after application of different correction procedures, namely a regression method (eye movement correction procedure, EMCP and a component based method (Independent Component Analysis, ICA. METHODOLOGY/PRINCIPLE FINDINGS: Real and simulated data were investigated with respect to blink-related potentials and the residual mutual information of uncorrected vertical electrooculogram (EOG and corrected EEG, which is a measure of residual EOG contribution to the EEG. The results reveal an occipital positivity that peaks at about 250 ms after the maximum blink excursion following application of either correction procedure. This positivity was not observable in the simulated data. Mutual information of vertical EOG and EEG depended on the applied regression procedure. In addition, different correction results were obtained for real and simulated data. ICA yielded almost perfect correction in all conditions. However, under certain conditions EMCP yielded comparable results to the ICA approach. CONCLUSION: In conclusion, for EMCP the quality of correction depended on the EMCP variant used and the structure of the data, whereas ICA always yielded almost perfect correction. However, its disadvantage is the much more complex data processing, and that it requires a suitable amount of data.

  3. on the correctness of load loss factor correctness of load loss factor ...

    African Journals Online (AJOL)

    eobe

    Author Tel: +44 -753-526-7242. TECHNICAL NOTE: TECHNICAL NOTE: ON THE CORRECTNESS OF LOAD LOSS FACTOR. CORRECTNESS OF LOAD LOSS FACTOR. CORRECTNESS OF LOAD LOSS FACTOR. A. O. Ekwue*. JACOBS ENGINEERING INC/BRUNEL UNIVERSITY LONDON,UNITED KINGDOM.

  4. Corrective Action Plan for Corrective Action Unit 424: Area 3 Landfill Complex, Tonopah Test Range, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    Bechtel Nevada

    1998-08-31

    This corrective action plan provides the closure implementation methods for the Area 3 Landfill Complex, Corrective Action Unit (CAU) 424, located at the Tonopah Test Range. The Area 3 Landfill Complex consists of 8 landfill sites, each designated as a separate corrective action site.

  5. Immediate error correction process following sleep deprivation.

    Science.gov (United States)

    Hsieh, Shulan; Cheng, I-Chen; Tsai, Ling-Ling

    2007-06-01

    Previous studies have suggested that one night of sleep deprivation decreases frontal lobe metabolic activity, particularly in the anterior cingulated cortex (ACC), resulting in decreased performance in various executive function tasks. This study thus attempted to address whether sleep deprivation impaired the executive function of error detection and error correction. Sixteen young healthy college students (seven women, nine men, with ages ranging from 18 to 23 years) participated in this study. Participants performed a modified letter flanker task and were instructed to make immediate error corrections on detecting performance errors. Event-related potentials (ERPs) during the flanker task were obtained using a within-subject, repeated-measure design. The error negativity or error-related negativity (Ne/ERN) and the error positivity (Pe) seen immediately after errors were analyzed. The results show that the amplitude of the Ne/ERN was reduced significantly following sleep deprivation. Reduction also occurred for error trials with subsequent correction, indicating that sleep deprivation influenced error correction ability. This study further demonstrated that the impairment in immediate error correction following sleep deprivation was confined to specific stimulus types, with both Ne/ERN and behavioral correction rates being reduced only for trials in which flanker stimuli were incongruent with the target stimulus, while the response to the target was compatible with that of the flanker stimuli following sleep deprivation. The results thus warrant future systematic investigation of the interaction between stimulus type and error correction following sleep deprivation.

  6. Nonperturbative QCD corrections to electroweak observables

    Energy Technology Data Exchange (ETDEWEB)

    Renner, Dru B. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Feng, Xu [High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki (Japan); Jansen, Karl [Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany); Petschlies, Marcus [The Cyprus Institute, Nicosia (Cyprus)

    2012-06-15

    Nonperturbative QCD corrections are important to many low-energy electroweak observables, for example the muon magnetic moment. However, hadronic corrections also play a significant role at much higher energies due to their impact on the running of standard model parameters, such as the electromagnetic coupling. Currently, these hadronic contributions are accounted for by a combination of experimental measurements, effective field theory techniques and phenomenological modeling but ideally should be calculated from first principles. Recent developments indicate that many of the most important hadronic corrections may be feasibly calculated using lattice QCD methods. To illustrate this, we examine the lattice computation of the leading-order QCD corrections to the muon magnetic moment, paying particular attention to a recently developed method but also reviewing the results from other calculations. We then continue with several examples that demonstrate the potential impact of the new approach: the leading-order corrections to the electron and tau magnetic moments, the running of the electromagnetic coupling, and a class of the next-to-leading-order corrections for the muon magnetic moment. Along the way, we mention applications to the Adler function, which can be used to determine the strong coupling constant, and QCD corrections to muonic-hydrogen.

  7. Attenuation correction for small animal PET tomographs

    Energy Technology Data Exchange (ETDEWEB)

    Chow, Patrick L [David Geffen School of Medicine at UCLA, Crump Institute for Molecular Imaging, University of California, 700 Westwood Plaza, Los Angeles, CA 90095 (United States); Rannou, Fernando R [Departamento de Ingenieria Informatica, Universidad de Santiago de Chile (USACH), Av. Ecuador 3659, Santiago (Chile); Chatziioannou, Arion F [David Geffen School of Medicine at UCLA, Crump Institute for Molecular Imaging, University of California, 700 Westwood Plaza, Los Angeles, CA 90095 (United States)

    2005-04-21

    Attenuation correction is one of the important corrections required for quantitative positron emission tomography (PET). This work will compare the quantitative accuracy of attenuation correction using a simple global scale factor with traditional transmission-based methods acquired either with a small animal PET or a small animal x-ray computed tomography (CT) scanner. Two phantoms (one mouse-sized and one rat-sized) and two animal subjects (one mouse and one rat) were scanned in CTI Concorde Microsystem's microPET (registered) Focus{sup TM} for emission and transmission data and in ImTek's MicroCAT{sup TM} II for transmission data. PET emission image values were calibrated against a scintillation well counter. Results indicate that the scale factor method of attenuation correction places the average measured activity concentration about the expected value, without correcting for the cupping artefact from attenuation. Noise analysis in the phantom studies with the PET-based method shows that noise in the transmission data increases the noise in the corrected emission data. The CT-based method was accurate and delivered low-noise images suitable for both PET data correction and PET tracer localization.

  8. English Learners Perception on Lecturers’ Corrective Feedback

    Directory of Open Access Journals (Sweden)

    Titien Fatmawaty Mohammad

    2016-04-01

    Full Text Available The importance of written corrective feedback (CF has been an issue of substantial debate in the literature and this controversial issue has led to a development in latest studies to draw on foreign language acquisition (FLA research as a way to further comprehend the complexities of this issue particularly how students and teachers perceive the effectiveness of written corrective feedback. This research has largely focused on students’ perception on Lecturers’ corrective feedback, perceives the usefulness of different types of corrective feedback and the reasons they have for their preferences. Qualitative data was collected from 40 EFL students in 6th semester, by means of written questionnaires, interview and observation. Four feedback strategies were employed in this research and ranked each statement by using five-point Likert scale. Findings showed that almost all students 81.43 % want correction or feedback from lecturers for the mistakes on their writing. For the type of written corrective feedback, students prefer lecturers mark their mistakes and give comment on their work with the percentage as follows: 93% students found that giving clues or comment about how to fix errors can improve their writing ability, 76.69% of the students found that error identification is the most useful type of feedback, and 57.50% of students have a positive opinion for the provision of correction which is accompanied by comment. Those percentages of students perspective is supported by students’ explanation in an open ended question of questionnaire. Pedagogical implications of the study are also discussed.

  9. Nonperturbative QCD corrections to electroweak observables

    Energy Technology Data Exchange (ETDEWEB)

    Dru B Renner, Xu Feng, Karl Jansen, Marcus Petschlies

    2011-12-01

    Nonperturbative QCD corrections are important to many low-energy electroweak observables, for example the muon magnetic moment. However, hadronic corrections also play a significant role at much higher energies due to their impact on the running of standard model parameters, such as the electromagnetic coupling. Currently, these hadronic contributions are accounted for by a combination of experimental measurements and phenomenological modeling but ideally should be calculated from first principles. Recent developments indicate that many of the most important hadronic corrections may be feasibly calculated using lattice QCD methods. To illustrate this, we will examine the lattice computation of the leading-order QCD corrections to the muon magnetic moment, paying particular attention to a recently developed method but also reviewing the results from other calculations. We will then continue with several examples that demonstrate the potential impact of the new approach: the leading-order corrections to the electron and tau magnetic moments, the running of the electromagnetic coupling, and a class of the next-to-leading-order corrections for the muon magnetic moment. Along the way, we will mention applications to the Adler function, the determination of the strong coupling constant and QCD corrections to muonic-hydrogen.

  10. Correction for near vision in pseudophakic patients

    Directory of Open Access Journals (Sweden)

    Dujić Mirjana

    2004-01-01

    Full Text Available Objective of the study was to show the mean values of correction for near vision and to discuss the presbyopic correction in pseudophakic patients. Setting was the Eye department where authors work. Inclusion criteria for 55 patients were native or corrected distant vision of 0.8-1.0 on Snellen's chart; 0,6 on Jagger's chart for near vision; round pupil and good position of the implant. Biometry of the anterior chamber depth with Alcon biophysics during distant and near vision was performed in our study. „Hi square" test was carried out and it was concluded that patients younger than 59 years (41 eyes had median correction of +2.0 dsph, while patients older than 60 years (36 eyes had correction of+3.0 dsph, but it was not statistically significant. There was no statistically significant difference of the correction between pseudophakic (41 and phakic (19 eyes in patients younger than 59 years. The anterior movement of the IOL was 0.18 mm in the younger group and 0.15 mm in the older group. With good IOL movement and new materials which could have changeable refractive power, the problem of pseudophakic correction for near vision might be solved.

  11. Revisiting corrective saccades: role of visual feedback.

    Science.gov (United States)

    Tian, Jing; Ying, Howard S; Zee, David S

    2013-08-30

    To clarify the role of visual feedback in the generation of corrective movements after inaccurate primary saccades, we used a visually-triggered saccade task in which we varied how long the target was visible. The target was on for only 100ms (OFF100ms), on until the start of the primary saccade (OFFonset) or on for 2s (ON). We found that the tolerance for the post-saccadic error was small (-2%) with a visual signal (ON) but greater (-6%) without visual feedback (OFF100ms). Saccades with an error of -10%, however, were likely to be followed by corrective saccades regardless of whether or not visual feedback was present. Corrective saccades were generally generated earlier when visual error information was available; their latency was related to the size of the error. The LATER (Linear Approach to Threshold with Ergodic Rate) model analysis also showed a comparable small population of short latency corrective saccades irrespective of the target visibility. Finally, we found, in the absence of visual feedback, the accuracy of corrective saccades across subjects was related to the latency of the primary saccade. Our findings provide new insights into the mechanisms underlying the programming of corrective saccades: (1) the preparation of corrective saccades begins along with the preparation of the primary saccades, (2) the accuracy of corrective saccades depends on the reaction time of the primary saccades and (3) if visual feedback is available after the initiation of the primary saccade, the prepared correction can be updated. Copyright © 2013 Elsevier Ltd. All rights reserved.

  12. Correction of tuberous breasts using the unfolded subareolar gland flap.

    Science.gov (United States)

    Oroz-Torres, Javier; Pelay-Ruata, María-Josefa; Escolán-Gonzalvo, Nieves; Jordán-Palomar, Elena

    2014-08-01

    In this retrospective study, the authors present 12 years of experience using a modified Puckett's technique with a double unfolded strictly subareolar glandular flap for surgical correction of the deformity known as "tuberous breast." In 1976, Rees and Aston documented this congenital malformation of the mammary glands in women. Its cause is unknown, and it affects adolescent girls with varying severity uni- or bilaterally. The condition is characterized by a lack of development, primarily in the lower quadrants of the breast plus a rising of the inframammary fold, together with herniation and increased diameter of the areola. Many varied surgical techniques for correction of this malformation in its different degrees of severity have been documented in the available literature. This study examined the treatment of 42 breasts in 26 patients with a high percentage of full correction of the deformity. The advantages and achievements of the double unfolded strictly subareolar glandular flap include restructuring of the breast's lower pole in volume, length, and shape; reduction and even removal of the double-bubble effect as the flap covers the implant fitted; lowering of inframammary fold height; and correction of areola size and herniation. The procedure is performed through a hemi- or periareolar incision. The technique is versatile for managing the different variations of tuberous breasts, making it another interesting option for correction of the deformity. Level of Evidence IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

  13. Optical proximity correction for anamorphic extreme ultraviolet lithography

    Science.gov (United States)

    Clifford, Chris; Lam, Michael; Raghunathan, Ananthan; Jiang, Fan; Fenger, Germain; Adam, Kostas

    2017-10-01

    The change from isomorphic to anamorphic optics in high numerical aperture (NA) extreme ultraviolet (EUV) scanners necessitates changes to the mask data preparation flow. The required changes for each step in the mask tape out process are discussed, with a focus on optical proximity correction (OPC). When necessary, solutions to new problems are demonstrated, and verified by rigorous simulation. Additions to the OPC model include accounting for anamorphic effects in the optics, mask electromagnetics, and mask manufacturing. The correction algorithm is updated to include awareness of anamorphic mask geometry for mask rule checking (MRC). OPC verification through process window conditions is enhanced to test different wafer scale mask error ranges in the horizontal and vertical directions. This work will show that existing models and methods can be updated to support anamorphic optics without major changes. Also, the larger mask size in the Y direction can result in better model accuracy, easier OPC convergence, and designs which are more tolerant to mask errors.

  14. Thermodynamic correction of numerical diffusion in WCSPH method

    Directory of Open Access Journals (Sweden)

    David López Gómez

    2015-01-01

    Full Text Available The SPH method has been used successfully for the numerical simulation of hydrodynamic flows. CEDEX has developed its own SPH model, SPHERIMENTAL for quasi-compressible flow, with which several studies of calibration have been performed. Problems of numerical diffusion have been observed in simulations of variable transient regime, which increase the entropy of the system and damp the movement of the fluid. It has been used a dambreak test case (Lobovsky, 2013 in which this effect has been noted. It is necessary to take care of the boundary conditions, the correct spatial discretization of the fluid and to use a suitable turbulence model to obtain an accurate numerical simulation, but even so, excessive energy dissipation occurs. The causes of this problem have been analyzed in this paper, and a correction is proposed.

  15. Simple regular black hole with logarithmic entropy correction

    Energy Technology Data Exchange (ETDEWEB)

    Morales-Duran, Nicolas; Vargas, Andres F.; Hoyos-Restrepo, Paulina; Bargueno, Pedro [Universidad de los Andes, Departamento de Fisica, Bogota, Distrito Capital (Colombia)

    2016-10-15

    A simple regular black hole solution satisfying the weak energy condition is obtained within Einstein-non-linear electrodynamics theory. We have computed the thermodynamic properties of this black hole by a careful analysis of the horizons and we have found that the usual Bekenstein-Hawking entropy gets corrected by a logarithmic term. Therefore, in this sense our model realises some quantum gravity predictions which add this kind of correction to the black hole entropy. In particular, we have established some similitudes between our model and a quadratic generalised uncertainty principle. This similitude has been confirmed by the existence of a remnant, which prevents complete evaporation, in agreement with the quadratic generalised uncertainty principle case. (orig.)

  16. Parton shower matching for electroweak corrections

    Energy Technology Data Exchange (ETDEWEB)

    Kraemer, Michael; Mueck, Alexander; Oymanns, Lennart [RWTH Aachen, Institut fuer Theoretische Teilchenphysik und Kosmologie (Germany)

    2016-07-01

    The POWHEG method is widely used to match next-to-leading order (NLO) QCD calculations with standard parton shower programs. It is also possible to use the POWHEG method to match electroweak (EW) corrections with parton showers. We present how the POWHEG method can be extended to handle EW corrections, including photon radiation, and we use it to investigate the Drell-Yan process (pp → μ{sup +}μ{sup -}). Our implementation is compared to an existing implementation in the POWHEGBOX and to NLO calculations for QCD and EW corrections.

  17. Leading gravitational corrections and a unified universe

    DEFF Research Database (Denmark)

    Codello, Alessandro; Jain, Rajeev Kumar

    2016-01-01

    Leading order gravitational corrections to the Einstein-Hilbert action can lead to a consistent picture of the universe by unifying the epochs of inflation and dark energy in a single framework. While the leading local correction induces an inflationary phase in the early universe, the leading...... nonlocal term leads to an accelerated expansion of the universe at the present epoch. We argue that both the leading UV and IR terms can be obtained within the framework of a covariant effective field theory of gravity. The perturbative gravitational corrections therefore provide a fundamental basis...

  18. Power corrections to exclusive processes in QCD

    Energy Technology Data Exchange (ETDEWEB)

    Mankiewicz, Lech

    2002-02-01

    In practice applicability of twist expansion crucially depends on the magnitude to power corrections to the leading-twist amplitude. I illustrate this point by considering explicit examples of two hard exclusive processes in QCD. In the case of {gamma}{sup *}{gamma} {yields} {pi}{pi} amplitude power corrections are small enough such that it should be possible to describe current experimental data by the leading-twist QCD prediction. The photon helicity-flip amplitude in DVCS on a nucleon receives large kinematical power corrections which screen the leading-twist prediction up to large values of the hard photon virtuality.

  19. Perimeter security for Minnesota correctional facilities

    Energy Technology Data Exchange (ETDEWEB)

    Crist, D. [Minnesota Department of Corrections, St. Paul, MN (United States); Spencer, D.D. [Sandia National Labs., Albuquerque, NM (United States)

    1996-12-31

    For the past few years, the Minnesota Department of Corrections, assisted by Sandia National Laboratories, has developed a set of standards for perimeter security at medium, close, and maximum custody correctional facilities in the state. During this process, the threat to perimeter security was examined and concepts about correctional perimeter security were developed. This presentation and paper will review the outcomes of this effort, some of the lessons learned, and the concepts developed during this process and in the course of working with architects, engineers and construction firms as the state upgraded perimeter security at some facilities and planned new construction at other facilities.

  20. Hologram production and representation for corrected image

    Science.gov (United States)

    Jiao, Gui Chao; Zhang, Rui; Su, Xue Mei

    2015-12-01

    In this paper, a CCD sensor device is used to record the distorted homemade grid images which are taken by a wide angle camera. The distorted images are corrected by using methods of position calibration and correction of gray with vc++ 6.0 and opencv software. Holography graphes for the corrected pictures are produced. The clearly reproduced images are obtained where Fresnel algorithm is used in graph processing by reducing the object and reference light from Fresnel diffraction to delete zero-order part of the reproduced images. The investigation is useful in optical information processing and image encryption transmission.

  1. Prevalence and distribution of corrective lenses among school-age children.

    Science.gov (United States)

    Kemper, Alex R; Bruckman, David; Freed, Gary L

    2004-01-01

    No population-based data are available regarding the proportion of school-age children who have corrective lenses in the U.S. The objective of this study was to quantify the proportion of children who have corrective lenses (glasses or contact lenses) and to evaluate the association of corrective lenses with age, gender, race/ethnicity, health insurance status, and family income. Children 6 to 18 years of age were identified in the 1998 Medical Expenditure Panel Survey. National estimates were made of the proportion with corrective lenses. Logistic regression modeling was used to assess factors that were associated with corrective lenses. Based on the 5,141 children in the 1988 Medical Expenditure Panel Survey, an estimated 25.4% of the 52.6 million children between 6 and 18 years had corrective lenses. Girls had greater odds than boys of having corrective lenses (odds ratio, 1.41; p lenses. Compared with uninsured black or Hispanic children (odds ratio, 1), greater odds of corrective lens use was found among uninsured nonblack/non-Hispanic children (odds ratio, 2.29; p = 0.002) and black or Hispanic children with public (odds ratio, 1.67; p = 0.005) or private health insurance (odds ratio,1.77; p = 0.004). Among families with an income > or =200% of the federal poverty level, the odds of having corrective lenses increased with age (p lenses at 12 to 14 years was similar to 15- to 18-year olds (p = 0.93). The use of corrective lenses suggests that correctable visual impairment is the most common treatable chronic condition of childhood. Income, gender, and race/ethnicity, depending on insurance status, are associated with having corrective lenses. The underlying causes and the impacts of these differences must be understood to ensure optimal delivery of eye care.

  2. The Role of CT-Based Attenuation Correction and Collimator Blurring Correction in Striatal Spect Quantification

    Directory of Open Access Journals (Sweden)

    J. M. Warwick

    2011-01-01

    Full Text Available Purpose. Striatal single photon emission computed tomography (SPECT imaging of the dopaminergic system is becoming increasingly used for clinical and research studies. The question about the value of nonuniform attenuation correction has become more relevant with the increasing availability of hybrid SPECT-CT scanners. In this study, the value of nonuniform attenuation correction and correction for collimator blurring were determined using both phantom data and patient data. Methods. SPECT imaging was performed using 7 anthropomorphic phantom measurements, and 14 patient studies using [I-123]-FP-CIT (DATSCAN. SPECT reconstruction was performed using uniform and nonuniform attenuation correction and collimator blurring corrections. Recovery values (phantom data or average-specific uptake ratios (patient data for the different reconstructions were compared at similar noise levels. Results. For the phantom data, improved recovery was found with nonuniform attenuation correction and collimator blurring corrections, with further improvement when performed together. However, for patient data the highest average specific uptake ratio was obtained using collimator blurring correction without nonuniform attenuation correction, probably due to subtle SPECT-CT misregistration. Conclusions. This study suggests that an optimal brain SPECT reconstruction (in terms of the lowest bias in patients would include a correction for collimator blurring and uniform attenuation correction.

  3. Patient satisfaction with correction of congenital penile curvature.

    Science.gov (United States)

    Mayer, M; Rey Valzacchi, G; Silva Garretón, A; Layus, O; Gueglio, G

    2017-12-29

    Congenital penile curvature is a relatively rare disease, resulting from a deviation of the penis from the body's straight axis when erect. The prevalence is difficult to determine. Although it has been suggested that the condition could affect up to 10% of the male population, most of these deviations are minor, with no clinical or psychological importance, which leads to its underdiagnosis. Effective correction of the deviation can markedly improve the quality of life of adolescents with this condition. To assess the quality of the sex life of patients diagnosed with congenital penile curvature who underwent surgical correction. Design Retrospective, observational cohort study. Data was collected from the medical records of patients who underwent surgical correction of congenital penile curvature from June 2004 to August 2016. The patients completed the following self-administered questionnaires: Sexual Quality of Life Questionnaire-Male (SQOL-M), International Index of Erectile Function 5 (IIEF 5) and "How satisfied are you with the results of the surgery? From 0 to 10". Twenty-two corporoplasties were performed to correct the patients' congenital penile curvature. The patients' average age was 23.4 years (range, 17-35). The mean deviation prior to surgery was 47.9° (range, 20°-90°). The average score on the SQOL-M was 52 points (range, 6-66). The average score on the IIEF 5 was 22.4 points. Congenital penile curvature profoundly decreases quality of life, and early surgery is fundamental for repairing the anatomical deformation and thereby significantly restores the patients' psychosocial and sexual wellbeing. Copyright © 2017 AEU. Publicado por Elsevier España, S.L.U. All rights reserved.

  4. Lactobacillus for Vaginal Microflora Correction

    Directory of Open Access Journals (Sweden)

    Saule Saduakhasova

    2014-12-01

    Full Text Available Introduction. Despite the significant progress made in prevention, diagnosis, and treatment, there is still a high rate of vaginal dysbiosis in Kazakh women. The use of antibiotics in the treatment of vaginal dysbiosis contributes to the elimination of pathogens as well as microflora, which can lead to a decrease in local immunity and more favorable conditions for infection spread. The most physiologically safe and promising method for the restoration of vaginal biocenosis is the use of probiotics administered by a vaginal route.Methods. We have allocated 64 of cultures of Lactobacillus from the vaginal epithelium of healthy women of reproductive age and women with diagnosed bacterial vaginosis (BV. Identification of cultures was performed by PCR analysis of 16S ribosomal RNA.  Evaluation of biological significance was determined by the following criteria: high antagonistic activity against Candida albicans, Escherichia coli, Serratia marcescens, Proteus mirabilis, Klebsiella ozaenae, and Staphylococcus aureus; and production of hydrogen peroxide, resistance to antibiotics, adhesive activity. We studied the symbiotic relationship of selected biologically active of cultures to each other and received options for consortiums with  properties of  probiotics through co-cultivation.Results. Results of genotyping  showed that the isolated lactobacilli belong to the seven species: L. fermentum, L. salivarius, L. gasseri, L. crispatus, L. jensenii, L. plantarum, and L. delbrueskii. L. fermentum, L. salivarius, L. gasseri, and L. jensenii occur in women with suspected BV. The highest percentage of occurrence in the vagina of healthy women was L. fermentum (28%. Most strains of lactobacilli possess high inhibitory activity for all test-strains, except Candida albicans (37.5%. 56% of studied cultures revealed high adhesion to human erythrocytes. All lactobacillus strains were resistant to metronidazole, 80% to kanamycin, 57%  to vancomycin, and

  5. Relativistic Scott correction for atoms and molecules

    DEFF Research Database (Denmark)

    Solovej, Jan Philip; Sørensen, Thomas Østergaard; Spitzer, Wolfgang Ludwig

    2010-01-01

    We prove the first correction to the leading Thomas-Fermi energy for the ground state energy of atoms and molecules in a model where the kinetic energy of the electrons is treated relativistically. The leading Thomas-Fermi energy, established in [25], as well as the correction given here, are of ......We prove the first correction to the leading Thomas-Fermi energy for the ground state energy of atoms and molecules in a model where the kinetic energy of the electrons is treated relativistically. The leading Thomas-Fermi energy, established in [25], as well as the correction given here......, are of semiclassical nature. Our result on atoms and molecules is proved from a general semiclassical estimate for relativistic operators with potentials with Coulomb-like singularities. This semiclassical estimate is obtained using the coherent state calculus introduced in [36]. The paper contains a unified treatment...

  6. HSIP Correctional Institutions in New Mexico

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — Jails and Prisons (Correctional Institutions). The Jails and Prisons sub-layer is part of the Emergency Law Enforcement Sector and the Critical Infrastructure...

  7. Holographic bulk reconstruction with α' corrections

    Science.gov (United States)

    Roy, Shubho R.; Sarkar, Debajyoti

    2017-10-01

    We outline a holographic recipe to reconstruct α' corrections to anti-de Sitter (AdS) (quantum) gravity from an underlying CFT in the strictly planar limit (N →∞ ). Assuming that the boundary CFT can be solved in principle to all orders of the 't Hooft coupling λ , for scalar primary operators, the λ-1 expansion of the conformal dimensions can be mapped to higher curvature corrections of the dual bulk scalar field action. Furthermore, for the metric perturbations in the bulk, the AdS /CFT operator-field isomorphism forces these corrections to be of the Lovelock type. We demonstrate this by reconstructing the coefficient of the leading Lovelock correction, also known as the Gauss-Bonnet term in a bulk AdS gravity action using the expression of stress-tensor two-point function up to subleading order in λ-1.

  8. Infinite-degree-corrected stochastic block model

    DEFF Research Database (Denmark)

    Herlau, Tue; Schmidt, Mikkel Nørgaard; Mørup, Morten

    2014-01-01

    , Phys. Rev. E 83, 016107 (2011)] incorporates a node degree correction to model degree heterogeneity within each group. Although this demonstrably leads to better performance on several networks, it is not obvious whether modeling node degree is always appropriate or necessary. We formulate the degree...... corrected stochastic block model as a nonparametric Bayesian model, incorporating a parameter to control the amount of degree correction that can then be inferred from data. Additionally, our formulation yields principled ways of inferring the number of groups as well as predicting missing links...... in the network that can be used to quantify the model’s predictive performance. On synthetic data we demonstrate that including the degree correction yields better performance on both recovering the true group structure and predicting missing links when degree heterogeneity is present, whereas performance...

  9. Wind Tunnel Blockage Corrections for Propellors

    Science.gov (United States)

    2007-01-01

    aerodynamicists to explore propeller blockage corrections. In one of his early publications, The Elements of Aerofoil and Airscrew Theory, Glauert...REFERENCES [1] Glauert, H., The Elements of Aerofoil and Airscrew Theory, Cambridge University Press, Cambridge, England, Second Edition, 1947

  10. Radiation Emitting Product Corrective Actions and Recalls

    Data.gov (United States)

    U.S. Department of Health & Human Services — This database provides descriptions of radiation-emitting products that have been recalled under an approved corrective action plan to remove defective and...

  11. 40 CFR 68.195 - Required corrections.

    Science.gov (United States)

    2010-07-01

    ...) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.195 Required corrections. The owner or... accident history information—For any accidental release meeting the five-year accident history reporting...

  12. The correct use of the ART approach.

    NARCIS (Netherlands)

    Frencken, J.E.F.M.; Leal, S.C.

    2010-01-01

    Confusion exists amongst dentists and scientists about the correct use of the caries management approach termed atraumatic restorative treatment (ART). Inconsistent use of the original definition of ART and suggested modifications (mART) have led to misunderstanding, misconception and

  13. 40 CFR 35.3170 - Corrective action.

    Science.gov (United States)

    2010-07-01

    ... STATE AND LOCAL ASSISTANCE State Water Pollution Control Revolving Funds § 35.3170 Corrective action. (a) Causes. If the RA determines that the State has not complied with requirements under title VI, the RA...

  14. Aberration corrected Lorentz scanning transmission electron microscopy

    Energy Technology Data Exchange (ETDEWEB)

    McVitie, S., E-mail: stephen.mcvitie@glasgow.ac.uk; McGrouther, D.; McFadzean, S.; MacLaren, D.A.; O’Shea, K.J.; Benitez, M.J.

    2015-05-15

    We present results from an aberration corrected scanning transmission electron microscope which has been customised for high resolution quantitative Lorentz microscopy with the sample located in a magnetic field free or low field environment. We discuss the innovations in microscope instrumentation and additional hardware that underpin the imaging improvements in resolution and detection with a focus on developments in differential phase contrast microscopy. Examples from materials possessing nanometre scale variations in magnetisation illustrate the potential for aberration corrected Lorentz imaging as a tool to further our understanding of magnetism on this lengthscale. - Highlights: • Demonstration of nanometre scale resolution in magnetic field free environment using aberration correction in the scanning transmission electron microscope (STEM). • Implementation of differential phase contrast mode of Lorentz microscopy in aberration corrected STEM with improved sensitivity. • Quantitative imaging of magnetic induction of nanostructures in amorphous and cross-section samples.

  15. Assessing the Security Vulnerabilities of Correctional Facilities

    Energy Technology Data Exchange (ETDEWEB)

    Morrison, G.S.; Spencer, D.S.

    1998-10-27

    The National Institute of Justice has tasked their Satellite Facility at Sandia National Laboratories and their Southeast Regional Technology Center in Charleston, South Carolina to devise new procedures and tools for helping correctional facilities to assess their security vulnerabilities. Thus, a team is visiting selected correctional facilities and performing vulnerability assessments. A vulnerability assessment helps to identi~ the easiest paths for inmate escape, for introduction of contraband such as drugs or weapons, for unexpected intrusion fi-om outside of the facility, and for the perpetration of violent acts on other inmates and correctional employees, In addition, the vulnerability assessment helps to quantify the security risks for the facility. From these initial assessments will come better procedures for performing vulnerability assessments in general at other correctional facilities, as well as the development of tools to assist with the performance of such vulnerability assessments.

  16. Evaluation of refractive correction for standard automated perimetry in eyes wearing multifocal contact lenses

    Science.gov (United States)

    Hirasawa, Kazunori; Ito, Hikaru; Ohori, Yukari; Takano, Yui; Shoji, Nobuyuki

    2017-01-01

    AIM To evaluate the refractive correction for standard automated perimetry (SAP) in eyes with refractive multifocal contact lenses (CL) in healthy young participants. METHODS Twenty-nine eyes of 29 participants were included. Accommodation was paralyzed in all participants with 1% cyclopentolate hydrochloride. SAP was performed using the Humphrey SITA-standard 24-2 and 10-2 protocol under three refractive conditions: monofocal CL corrected for near distance (baseline); multifocal CL corrected for distance (mCL-D); and mCL-D corrected for near vision using a spectacle lens (mCL-N). Primary outcome measures were the foveal threshold, mean deviation (MD), and pattern standard deviation (PSD). RESULTS The foveal threshold of mCL-N with both the 24-2 and 10-2 protocols significantly decreased by 2.2-2.5 dB (Pcorrection without additional near correction is to be recommended. PMID:29062776

  17. Corrective Action Decision Document for Corrective Action Unit 166: Storage Yards and Contaminated Materials, Nevada Test Site, Nevada with Errata Sheet

    Energy Technology Data Exchange (ETDEWEB)

    Grant Evenson

    2007-03-01

    This Corrective Action Decision Document (CADD) has been prepared for Corrective Action Unit (CAU) 166, Storage Yards and Contaminated Materials, in accordance with the Federal Facility Agreement and Consent Order (1996). The corrective action sites (CASs) are located in Areas 2, 3, 5, and 18 of the Nevada Test Site, Nevada. Corrective Action Unit 166 is comprised of the following CASs: • 02-42-01, Cond. Release Storage Yd - North • 02-42-02, Cond. Release Storage Yd - South • 02-99-10, D-38 Storage Area • 03-42-01, Conditional Release Storage Yard • 05-19-02, Contaminated Soil and Drum • 18-01-01, Aboveground Storage Tank • 18-99-03, Wax Piles/Oil Stain The purpose of this CADD is to identify and provide the rationale for the recommendation of a corrective action alternative (CAA) for the seven CASs within CAU 166. Corrective action investigation (CAI) activities were performed from July 31, 2006, through February 28, 2007, as set forth in the CAU 166 Corrective Action Investigation Plan (NNSA/NSO, 2006).

  18. Quantum corrections for a cosmological string solution

    Energy Technology Data Exchange (ETDEWEB)

    Behrndt, K.

    1994-08-01

    The author investigates quantum corrections for a cosmological solution of the string effective action. Starting point is a classical solution containing an antisymmetric tensor field, a dilaton and a modulus field which has singularities in the scalar fields. As a first step he quantizes the scalar fields near the singularity with the result that the singularities disappear and that in general non-perturbative quantum corrections form a potential in the scalar fields.

  19. Ricean Bias Correction in Linear Polarization Observation

    OpenAIRE

    Bong Won Sohn

    2011-01-01

    I developed an enhanced correction method for Ricean bias which occurs in linear polarization measurement. Two known methods for Ricean bias correction are reviewed. In low signal-to-noise area, the method based on the mode of the equation gives better representation of the fractional polarization. But a caution should be given that the accurate estimation of noise level, i.e. σ of the polarized flux, is important. The maximum likelihood method is better choice for high signal-to-...

  20. Quantum corrected Schwarzschild thin-shell wormhole

    OpenAIRE

    Jusufi, Kimet

    2016-01-01

    Recently, Ali and Khalil (Nucl Phys B, 909, 173–185, 2016 ), based on Bohmian quantum mechanics, derived a quantum corrected version of the Schwarzschild metric. In this paper, we construct a quantum corrected Schwarzschild thin-shell wormhole (QSTSW) and investigate the stability of this wormhole. First we compute the surface stress at the wormhole throat by applying the Darmois–Israel formalism to the modified Schwarzschild metric and show that exotic matter is required at the throat to kee...

  1. Blockwise Repeated Burst Error Correcting Linear Codes

    Directory of Open Access Journals (Sweden)

    B.K. Dass

    2010-12-01

    Full Text Available This paper presents a lower and an upper bound on the number of parity check digits required for a linear code that corrects a single sub-block containing errors which are in the form of 2-repeated bursts of length b or less. An illustration of such kind of codes has been provided. Further, the codes that correct m-repeated bursts of length b or less have also been studied.

  2. Boundary Correct Real-Time Soft Shadows

    DEFF Research Database (Denmark)

    Jacobsen, Bjarke; Christensen, Niels Jørgen; Larsen, Bent Dalgaard

    2004-01-01

    This paper describes a method to determine correct shadow boundaries from an area light source using umbra and penumbra volumes. The light source is approximated by a circular disk as this gives a fast way to extrude the volumes. The method also gives a crude estimate of the visibility of the area...... for implementation on most programmable hardware. Though some crude approximations are used in the visibility function, the method can be used to produce soft shadows with correct boundaries in real time....

  3. Correctional mental health in the USA.

    Science.gov (United States)

    A Dlugacz, Henry

    2014-01-01

    The purpose of this paper is to discuss five domains impacted by the transformation of correctional mental health care in the USA: public health, public safety, legal obligations, fiscal responsibility and ethical standards, as well as critical issues such as administrative segregation, suicide prevention and reentry planning. In the last four decades, the USA has seen a sizable growth in its criminal justice system and corrections population. It has also seen reductions in civil and community-based mental health care. Persons with mental disabilities have come to represent a highly disproportional segment of the corrections population. The paper discusses the implications and underlying causes of these developments as well as recent responses to them. This set of circumstances is starting to change the mission of correctional health services from crisis intervention and suicide prevention to include preparation for the inmate's almost inevitable return to the community. Such changes have led to further developments in correctional mental health care, in particular, policy designed to treat mental illness, reduce its destructive outcomes such as suicide, and facilitate successful reentry into the community in attempts to reduce recidivism and improve clinical outcomes. Mental health care professionals working within corrections have likewise faced ethical challenges in effectuating treatment.

  4. Optimal feedback correction in string quartet synchronization.

    Science.gov (United States)

    Wing, Alan M; Endo, Satoshi; Bradbury, Adrian; Vorberg, Dirk

    2014-04-06

    Control of relative timing is critical in ensemble music performance. We hypothesize that players respond to and correct asynchronies in tone onsets that arise from fluctuations in their individual tempos. We propose a first-order linear phase correction model and demonstrate that optimal performance that minimizes asynchrony variance predicts a specific value for the correction gain. In two separate case studies, two internationally recognized string quartets repeatedly performed a short excerpt from the fourth movement of Haydn's quartet Op. 74 no. 1, with intentional, but unrehearsed, expressive variations in timing. Time series analysis of successive tone onset asynchronies was used to estimate correction gains for all pairs of players. On average, both quartets exhibited near-optimal gain. However, individual gains revealed contrasting patterns of adjustment between some pairs of players. In one quartet, the first violinist exhibited less adjustment to the others compared with their adjustment to her. In the second quartet, the levels of correction by the first violinist matched those exhibited by the others. These correction patterns may be seen as reflecting contrasting strategies of first-violin-led autocracy versus democracy. The time series approach we propose affords a sensitive method for investigating subtle contrasts in music ensemble synchronization.

  5. Optimal feedback correction in string quartet synchronization

    Science.gov (United States)

    Wing, Alan M.; Endo, Satoshi; Bradbury, Adrian; Vorberg, Dirk

    2014-01-01

    Control of relative timing is critical in ensemble music performance. We hypothesize that players respond to and correct asynchronies in tone onsets that arise from fluctuations in their individual tempos. We propose a first-order linear phase correction model and demonstrate that optimal performance that minimizes asynchrony variance predicts a specific value for the correction gain. In two separate case studies, two internationally recognized string quartets repeatedly performed a short excerpt from the fourth movement of Haydn's quartet Op. 74 no. 1, with intentional, but unrehearsed, expressive variations in timing. Time series analysis of successive tone onset asynchronies was used to estimate correction gains for all pairs of players. On average, both quartets exhibited near-optimal gain. However, individual gains revealed contrasting patterns of adjustment between some pairs of players. In one quartet, the first violinist exhibited less adjustment to the others compared with their adjustment to her. In the second quartet, the levels of correction by the first violinist matched those exhibited by the others. These correction patterns may be seen as reflecting contrasting strategies of first-violin-led autocracy versus democracy. The time series approach we propose affords a sensitive method for investigating subtle contrasts in music ensemble synchronization. PMID:24478285

  6. Corrective Action Decision Document for Corrective Action Unit 342: Area 23 Mercury Fire Training Pit, Nevada Test Site, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    DOE/NV

    1999-05-26

    This Corrective Action Decision Document has been prepared for the Nevada Test Site's Area 23 Mercury Fire Training Pit (Corrective Action Unit 342) in accordance with the Federal Facility Agreement and Consent Order (FFACO, 1996). Corrective Action Unit 342 is comprised of Corrective Action Site 23-56-01. The purpose of this Corrective Action Decision Document is to identify and provide a rationale for the selection of a recommended corrective action alternative for Corrective Action Unit 342. The scope of this document consists of the following: Develop corrective action objectives; Identify corrective action alternative screening criteria; Develop corrective action alternatives; Perform detailed and comparative evaluations of corrective action alternatives in relation to corrective action objectives and screening criteria; and Recommend and justify a preferred corrective action alternative for the Corrective Action Unit.

  7. Research on environment correction algorithm in the minimum deviation angle method for refractive index measuring

    Science.gov (United States)

    Sun, Chuan; Wang, Shanshan; Zhou, Siyu; Zhu, Qiudong

    2017-02-01

    This paper studies environment correction algorithm in the minimum deviation angle method for refractive index measuring. The principle equation of minimum deviation angle method, based on the refractive index of air and the absolute refractive index of glass specimens is derived. The environmental factors are analyzed which may affect the measurement results in the process of actual measurement. According to thermal characteristics equations of glass, absolute index of refraction of glass for certain material is related to temperature. According to the Edlén equation, refractive index of air is related to temperature, pressure, humidity and so on. Sometimes, the environmental factors are uncontrollable, refractive index will change over the environmental factors, including temperature, pressure and humidity. The correction algorithm of refractive index which modified the measurement results from the non-standard environmental conditions to standard conditions is perfected. It improves the correction accuracy. Taking H-ZK9B for example, the impact of environmental factors on the refractive index is analyzed adopting controlling variable method. The need for environmental factors correction in different accuracy requirements is given. To verify the correction method, two sets of measured refractive index data of the same glass are corrected which measured under different environmental factors. The difference between the two sets of data is less than 1×10-6 with the correction.

  8. Effect of optical correction and remaining aberrations on peripheral resolution acuity in the human eye.

    Science.gov (United States)

    Lundström, Linda; Manzanera, Silvestre; Prieto, Pedro M; Ayala, Diego B; Gorceix, Nicolas; Gustafsson, Jörgen; Unsbo, Peter; Artal, Pablo

    2007-10-01

    Retinal sampling poses a fundamental limit to resolution acuity in the periphery. However, reduced image quality from optical aberrations may also influence peripheral resolution. In this study, we investigate the impact of different degrees of optical correction on acuity in the periphery. We used an adaptive optics system to measure and modify the off-axis aberrations of the right eye of six normal subjects at 20 degrees eccentricity. The system consists of a Hartmann-Shack sensor, a deformable mirror, and a channel for visual testing. Four different optical corrections were tested, ranging from foveal sphero-cylindrical correction to full correction of eccentric low- and high-order monochromatic aberrations. High-contrast visual acuity was measured in green light using a forced choice procedure with Landolt C's, viewed via the deformable mirror through a 4.8-mm artificial pupil. The Zernike terms mainly induced by eccentricity were defocus and with- and against-the-rule astigmatism and each correction condition was successfully implemented. On average, resolution decimal visual acuity improved from 0.057 to 0.061 as the total root-mean-square wavefront error changed from 1.01 mum to 0.05 mum. However, this small tendency of improvement in visual acuity with correction was not significant. The results suggest that for our experimental conditions and subjects, the resolution acuity in the periphery cannot be improved with optical correction.

  9. Advantages and disadvantages of multifocal contact lens correction of presbyopia in patients with myopic refraction

    OpenAIRE

    A. G. Shchuko; N. N. Seliverstova; E. A. Rogozhnikova; O. I. Rozanova

    2014-01-01

    Purpose: To evaluate the results of multifocal contact correction of presbyopia in subjects with myopic refraction.Methods: The study included 28 patients with myopia (range 43 to 54 years) in conditions of routine contact correction of vision. The examination was repeated a month later after wearing of multifocal contact lenses. The following parameters were assessed: far visual acuity, near and intermediate visual acuity (monocular and binocular), spatial contrast sensitivity, stereo vision...

  10. From quantum feedback to probabilistic error correction: manipulation of quantum beats in cavity QED

    Energy Technology Data Exchange (ETDEWEB)

    Barberis-Blostein, P [Instituto de Investigaciones en Matematicas Aplicadas y en Sistemas, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, 04510, Mexico, DF (Mexico); Norris, D G; Orozco, L A; Carmichael, H J [Joint Quantum Institute, Department of Physics, University of Maryland and National Institute of Standards and Technology, College Park, MD 20742 (United States)], E-mail: lorozco@umd.edu

    2010-02-15

    It is shown how one can implement quantum feedback and probabilistic error correction in an open quantum system consisting of a single atom, with ground- and excited-state Zeeman structure, in a driven two-mode optical cavity. The ground-state superposition is manipulated and controlled through conditional measurements and external fields, which shield the coherence and correct quantum errors. Modeling an experimentally realistic situation demonstrates the robustness of the proposal for realization in the laboratory.

  11. Fringe-print-through error analysis and correction in snapshot phase-shifting interference microscope.

    Science.gov (United States)

    Zhang, Yu; Tian, Xiaobo; Liang, Rongguang

    2017-10-30

    To reduce the environmental errors, a snapshot phase-shifting interference microscope (SPSIM) has been developed for surface roughness measurement. However, fringe-print-through (FPT) error widely exists in the phase-shifting interferometry (PSI). To ensure the measurement accuracy, we analyze the sources which introduce the FPT error in the SPSIM. We also develop a FPT error correction algorithm which can be used in the different intensity distribution conditions. The simulation and experiment verify the correctness and feasibility of the FPT error correction algorithm.

  12. Universality in radiative corrections for non-supersymmetric heterotic vacua

    CERN Document Server

    Angelantonj, C; Tsulaia, Mirian

    2016-01-01

    Properties of moduli-dependent gauge threshold corrections in non-supersymmetric heterotic vacua are reviewed. In the absence of space-time supersymmetry these amplitudes are no longer protected and receive contributions from the whole tower of string states, BPS and not. Never-theless, the difference of gauge thresholds for non-Abelian gauge groups displays a remarkable universality property, even when supersymmetry is absent. We present a simple heterotic construction that shares this universal behaviour and expose the necessary conditions on the super-symmetry breaking mechanism for universality to occur.

  13. CTE Corrections for WFPC2 and ACS

    Science.gov (United States)

    Dolphin, Andrew

    2003-07-01

    The error budget for optical broadband photometry is dominated by three factors: CTE corrections, long-short anomaly corrections, and photometric zero points. Questions about the dependencies of the CTE have largely been resolved, and my CTE corrections have been included in the WFPC2 handbook and tutorial. What remains to be done is the determination of the "final" CTE correction at the end of the WFPC2 mission, which will increase the accuracy of photometry obtained in the final few cycles. The long-short anomaly is still the subject of much debate, as it remains unclear whethere or not this effect is real and, if so, what its size and nature is. Photometric zero points have likewise varied by over 0.05 magnitudes in the literature, and will likely remain unresolved until the long-short anomaly is addressed {given that most calibration exposures are short while most science exposures are long}. It is also becoming apparent that similar issues will affect the accuracy of ACS photometry, and consequently that an ACS CTE study analogous to my WFPC2 work would significantly improve the calibration of ACS. I therefore propose to use archival WFPC2 images of omega Cen and ACS images of 47 Tuc to continue my HST calibration work. I also propose to begin work on "next-generation" CTE corrections, in which corrections are applied to the images based on accurate charge-trapping models rather than to the reduced photometry. This technique will allow for more accurate CTE corrections in certain cases {such as a star above a bright star or on a variable background}, improved PSF-fitting photometry of faint stars, and image restoration for accurate analysis of extended objects.

  14. Bias correction of regional climate model simulations for hydrological climate-change impact studies: Review and evaluation of different methods

    Science.gov (United States)

    Teutschbein, Claudia; Seibert, Jan

    2012-08-01

    SummaryDespite the increasing use of regional climate model (RCM) simulations in hydrological climate-change impact studies, their application is challenging due to the risk of considerable biases. To deal with these biases, several bias correction methods have been developed recently, ranging from simple scaling to rather sophisticated approaches. This paper provides a review of available bias correction methods and demonstrates how they can be used to correct for deviations in an ensemble of 11 different RCM-simulated temperature and precipitation series. The performance of all methods was assessed in several ways: At first, differently corrected RCM data was compared to observed climate data. The second evaluation was based on the combined influence of corrected RCM-simulated temperature and precipitation on hydrological simulations of monthly mean streamflow as well as spring and autumn flood peaks for five catchments in Sweden under current (1961-1990) climate conditions. Finally, the impact on hydrological simulations based on projected future (2021-2050) climate conditions was compared for the different bias correction methods. Improvement of uncorrected RCM climate variables was achieved with all bias correction approaches. While all methods were able to correct the mean values, there were clear differences in their ability to correct other statistical properties such as standard deviation or percentiles. Simulated streamflow characteristics were sensitive to the quality of driving input data: Simulations driven with bias-corrected RCM variables fitted observed values better than simulations forced with uncorrected RCM climate variables and had more narrow variability bounds.

  15. Color correction of smartphone photos with prior knowledge

    Science.gov (United States)

    Jiang, Jun; Zhao, Yonghui; Wang, Shen-ge

    2012-03-01

    Human visual system has the property of perceiving the object color to remain constant regardless of the prevailing illumination. However, digital cameras usually lack this capability, and the captured images are digitally corrected to discount the color of the scene light based on the estimated illuminant. Illumination estimation might be erroneous in some artificial or chromatic lighting conditions. A method was proposed to correct digital photos captured with a smartphone camera using the smartphone owner's face as the reference. Taking the advantage of the latest smartphones with two build-in cameras, we could use the front camera to capture the smartphone owner's face and compare with the saved reference face image in order to estimate the scene illuminant. After that, we could properly adjust the capture setting for the main camera in order to take a decent target image; or we could automatically correct the target image based on the estimated illumination by comparing two face images. The method was implemented on the iOS mobile platform. Experimental result shows that the adjusted images using the proposed method are generally more favorable than the pictures taken directly by the default camera application.

  16. Pectus excavatum and cardiac surgery: simultaneous correction advocated.

    Science.gov (United States)

    Schmidt, Joachim; Redwan, Bassam; Koesek, Volkan; Aebert, Hermann; Tjan, Tonny Djie-Tiong; Martens, Sven; Wiebe, Karsten

    2014-04-01

    Severe pectus excavatum may be present in combination with cardiac conditions requiring open-heart surgery. The best strategy for this situation has been debated controversially. In a retrospective study, we analyzed all our patients undergoing concurrent pectus excavatum correction and open-heart surgery. Ten patients aged 9 to 70 years underwent a simultaneous combined surgical procedure between 2001 and 2013. Indications for cardiac surgery were various forms of congenital and acquired heart disease including coronary artery disease with internal thoracic artery grafts and ascending aortic aneurysms. A modified Ravitch procedure was performed for pectus excavatum correction (mean Haller-Index 5.0). Mean operating time was 364 (210-495) minutes and mean duration of cardiopulmonary bypass was 125 (54-222) minutes. All procedures were completed successfully. Postoperatively minor complications were observed in three patients. In-hospital and 30-day mortalities were nil. Good cosmetic and functional results were achieved in all patients. Our data demonstrate that simultaneous pectus excavatum correction and cardiac surgery is effective and reliable. A combined approach is advocated if candidates for cardiac surgery present with significant pectus excavatum deformity. Georg Thieme Verlag KG Stuttgart · New York.

  17. Developing Formal Correctness Properties from Natural Language Requirements

    Science.gov (United States)

    Nikora, Allen P.

    2006-01-01

    This viewgraph presentation reviews the rationale of the program to transform natural language specifications into formal notation.Specifically, automate generation of Linear Temporal Logic (LTL)correctness properties from natural language temporal specifications. There are several reasons for this approach (1) Model-based techniques becoming more widely accepted, (2) Analytical verification techniques (e.g., model checking, theorem proving) significantly more effective at detecting types of specification design errors (e.g., race conditions, deadlock) than manual inspection, (3) Many requirements still written in natural language, which results in a high learning curve for specification languages, associated tools and increased schedule and budget pressure on projects reduce training opportunities for engineers, and (4) Formulation of correctness properties for system models can be a difficult problem. This has relevance to NASA in that it would simplify development of formal correctness properties, lead to more widespread use of model-based specification, design techniques, assist in earlier identification of defects and reduce residual defect content for space mission software systems. The presentation also discusses: potential applications, accomplishments and/or technological transfer potential and the next steps.

  18. Tls Field Data Based Intensity Correction for Forest Environments

    Science.gov (United States)

    Heinzel, J.; Huber, M. O.

    2016-06-01

    Terrestrial laser scanning (TLS) is increasingly used for forestry applications. Besides the three dimensional point coordinates, the 'intensity' of the reflected signal plays an important role in forestry and vegetation studies. The benefit of the signal intensity is caused by the wavelength of the laser that is within the near infrared (NIR) for most scanners. The NIR is highly indicative for various vegetation characteristics. However, the intensity as recorded by most terrestrial scanners is distorted by both external and scanner specific factors. Since details about system internal alteration of the signal are often unknown to the user, model driven approaches are impractical. On the other hand, existing data driven calibration procedures require laborious acquisition of separate reference datasets or areas of homogenous reflection characteristics from the field data. In order to fill this gap, the present study introduces an approach to correct unwanted intensity variations directly from the point cloud of the field data. The focus is on the variation over range and sensor specific distortions. Instead of an absolute calibration of the values, a relative correction within the dataset is sufficient for most forestry applications. Finally, a method similar to time series detrending is presented with the only pre-condition of a relative equal distribution of forest objects and materials over range. Our test data covers 50 terrestrial scans captured with a FARO Focus 3D S120 scanner using a laser wavelength of 905 nm. Practical tests demonstrate that our correction method removes range and scanner based alterations of the intensity.

  19. Caliber Corrected Markov Modeling (C2M2): Correcting Equilibrium Markov models

    OpenAIRE

    Dixit, Purushottam D.; Dill, Ken A

    2017-01-01

    Rate processes are often modeled using Markov-State Models (MSM). Suppose you know a prior MSM, and then learn that your prediction of some particular observable rate is wrong. What is the best way to correct the whole MSM? For example, molecular dynamics simulations of protein folding may sample many microstates, possibly giving correct pathways through them, while also giving the wrong overall folding rate, when compared to experiment. Here, we describe Caliber Corrected Markov Modeling (C2...

  20. Characterization of Image Quality for 3D Scatter Corrected Breast CT Images.

    Science.gov (United States)

    Pachon, Jan H; Shah, Jainil; Tornai, Martin P

    2011-03-16

    The goal of this study was to characterize the image quality of our dedicated, quasi-monochromatic spectrum, cone beam breast imaging system under scatter corrected and non-scatter corrected conditions for a variety of breast compositions. CT projections were acquired of a breast phantom containing two concentric sets of acrylic spheres that varied in size (1-8mm) based on their polar position. The breast phantom was filled with 3 different concentrations of methanol and water, simulating a range of breast densities (0.79-1.0g/cc); acrylic yarn was sometimes included to simulate connective tissue of a breast. For each phantom condition, 2D scatter was measured for all projection angles. Scatter-corrected and uncorrected projections were then reconstructed with an iterative ordered subsets convex algorithm. Reconstructed image quality was characterized using SNR and contrast analysis, and followed by a human observer detection task for the spheres in the different concentric rings. Results show that scatter correction effectively reduces the cupping artifact and improves image contrast and SNR. Results from the observer study indicate that there was no statistical difference in the number or sizes of lesions observed in the scatter versus non-scatter corrected images for all densities. Nonetheless, applying scatter correction for differing breast conditions improves overall image quality.

  1. Trajectory Auto-Corrected image reconstruction.

    Science.gov (United States)

    Ianni, Julianna D; Grissom, William A

    2016-09-01

    To estimate k-space trajectory errors in non-Cartesian acquisitions and reconstruct distortion-free images, without trajectory measurements or gradient calibrations. The Trajectory Auto-Corrected image Reconstruction method jointly estimates k-space trajectory errors and images, based on SENSE and SPIRiT parallel imaging reconstruction. The underlying idea is that parallel imaging and oversampling in the center of k-space provides data redundancy that can be exploited to simultaneously reconstruct images and correct trajectory errors. Trajectory errors are represented as weighted sums of trajectory-dependent error basis functions, the coefficients of which are estimated using gradient-based optimization. Trajectory Auto-Corrected image Reconstruction was applied to reconstruct images and errors in golden angle radial, center-out radial, and spiral in vivo 7 Tesla brain acquisitions in five subjects. Compared to reconstructions using nominal trajectories, Trajectory auto-corrected image reconstructions contained considerably less blurring and streaking and were of similar quality to images reconstructed using measured k-space trajectories in the center-out radial and spiral cases. Reconstruction cost function reductions and improvements in normalized image gradient squared were also similar to those for images reconstructed using measured trajectories. Trajectory Auto-Corrected image Reconstruction enables non-Cartesian image reconstructions free from trajectory errors without the need for separate gradient calibrations or trajectory measurements. Magn Reson Med 76:757-768, 2016. © 2015 Wiley Periodicals, Inc. © 2015 Wiley Periodicals, Inc.

  2. a New Color Correction Method for Underwater Imaging

    Science.gov (United States)

    Bianco, G.; Muzzupappa, M.; Bruno, F.; Garcia, R.; Neumann, L.

    2015-04-01

    Recovering correct or at least realistic colors of underwater scenes is a very challenging issue for imaging techniques, since illumination conditions in a refractive and turbid medium as the sea are seriously altered. The need to correct colors of underwater images or videos is an important task required in all image-based applications like 3D imaging, navigation, documentation, etc. Many imaging enhancement methods have been proposed in literature for these purposes. The advantage of these methods is that they do not require the knowledge of the medium physical parameters while some image adjustments can be performed manually (as histogram stretching) or automatically by algorithms based on some criteria as suggested from computational color constancy methods. One of the most popular criterion is based on gray-world hypothesis, which assumes that the average of the captured image should be gray. An interesting application of this assumption is performed in the Ruderman opponent color space lαβ, used in a previous work for hue correction of images captured under colored light sources, which allows to separate the luminance component of the scene from its chromatic components. In this work, we present the first proposal for color correction of underwater images by using lαβ color space. In particular, the chromatic components are changed moving their distributions around the white point (white balancing) and histogram cutoff and stretching of the luminance component is performed to improve image contrast. The experimental results demonstrate the effectiveness of this method under gray-world assumption and supposing uniform illumination of the scene. Moreover, due to its low computational cost it is suitable for real-time implementation.

  3. Ricean Bias Correction in Linear Polarization Observation

    Directory of Open Access Journals (Sweden)

    Bong Won Sohn

    2011-12-01

    Full Text Available I developed an enhanced correction method for Ricean bias which occurs in linear polarization measurement. Two known methods for Ricean bias correction are reviewed. In low signal-to-noise area, the method based on the mode of the equation gives better representation of the fractional polarization. But a caution should be given that the accurate estimation of noise level, i.e. σ of the polarized flux, is important. The maximum likelihood method is better choice for high signal-to-noise area. I suggest a hybrid method which uses the mode of the equation at the low signal-to-noise area and takes the maximum likelihood method at the high signal-to-noise area. A modified correction coefficient for the mode solution is proposed. The impact on the depolarization measure analysis is discussed.

  4. RCRA corrective action program guide (Interim)

    Energy Technology Data Exchange (ETDEWEB)

    1993-05-01

    The US Department of Energy (DOE) is responsible for compliance with an increasingly complex spectrum of environmental regulations. One of the most complex programs is the corrective action program proposed by the US Environmental Protection Agency (EPA) under the authority of the Resource Conservation and Recovery Act (RCRA) as amended by the Hazardous and Solid Waste Amendments (HSWA). The proposed regulations were published on July 27, 1990. The proposed Subpart S rule creates a comprehensive program for investigating and remediating releases of hazardous wastes and hazardous waste constituents from solid waste management units (SWMUs) at facilities permitted to treat, store, or dispose of hazardous wastes. This proposed rule directly impacts many DOE facilities which conduct such activities. This guidance document explains the entire RCRA Corrective Action process as outlined by the proposed Subpart S rule, and provides guidance intended to assist those persons responsible for implementing RCRA Corrective Action at DOE facilities.

  5. Quantum Corrected Schwarzschild Thin Shell Wormhole

    CERN Document Server

    Jusufi, Kimet

    2016-01-01

    Recently, Ali and Khalil \\cite{ahmed}, based on the Bohmian quantum mechanics derived a quantum corrected version of the Schwarzschild metric. In this paper, we construct a quantum corrected Schwarzschild thin shell wormhole (QSTSW) and investigate the stability of this wormhole. First we compute the surface stress at the wormhole throat by applying the Darmois-Israel formalism to the modified Schwarzschild metric and show that exotic matter is required at the throat to keep the wormhole stable. We then study the stability analysis of the wormhole by considering phantom-energy for the exotic matter, generalized Chaplygin gas (GCG), and the linearized stability analysis. It is argued that, quantum corrections can affect the stability domain of the wormhole.

  6. Quantum corrected Schwarzschild thin-shell wormhole

    Energy Technology Data Exchange (ETDEWEB)

    Jusufi, Kimet [State University of Tetovo, Physics Department, Tetovo (Macedonia, The Former Yugoslav Republic of)

    2016-11-15

    Recently, Ali and Khalil (Nucl Phys B, 909, 173-185, 2016), based on Bohmian quantum mechanics, derived a quantum corrected version of the Schwarzschild metric. In this paper, we construct a quantum corrected Schwarzschild thin-shell wormhole (QSTSW) and investigate the stability of this wormhole. First we compute the surface stress at the wormhole throat by applying the Darmois-Israel formalism to the modified Schwarzschild metric and show that exotic matter is required at the throat to keep the wormhole stable. We then study the stability analysis of the wormhole by considering phantom-energy for the exotic matter, generalized Chaplygin gas (GCG), and the linearized stability analysis. It is argued that quantum corrections can affect the stability domain of the wormhole. (orig.)

  7. Influence of refractive correction on ocular dominance

    Science.gov (United States)

    Nakayama, Nanami; Kawamorita, Takushi; Uozato, Hiroshi

    2010-07-01

    We investigated the effects of refractive correction and refractive defocus on the assessment of sensory ocular dominance. In 25 healthy subjects (4 males and 21 females) aged between 20 and 31 years, a quantitative measurement of sensory ocular dominance was performed with refractive correction and the addition of a positive lens on the dominant eye. Sensory ocular dominance was measured with a chart using binocular rivalry targets. The reversal point changed after the addition of a +1.00 D lens on the dominant eye in all subjects. However, sighting ocular dominance and stereopsis did not change after the addition of a positive lens on the dominant eye ( P > 0:05, Wilcoxon test). These results suggest that refractive correction affects sensory ocular dominance, indicating the possible development of a new type of occlusion for amblyopia in the future.

  8. [Aggression and mobbing among correctional officers].

    Science.gov (United States)

    Merecz-Kot, Dorota; Cebrzyńska, Joanna

    2008-01-01

    The paper addresses the issue of violence among correctional officers. The aim of the study was to assess the frequency of exposure to violence in this professional group. The study comprised the sample of 222 correctional officers who voluntary and anonymously fulfilled the MDM questionnaire. The MDM Questionnaire allows for assessing exposure to aggression and mobbing at work. Preliminary assessment of exposure to single aggressive acts and mobbing shows a quite alarming tendency--around one third of subjects under the study experienced repetitive aggressive acts from coworkers and/or superiors. The problem of organizational aggression in correctional institutions should be recognized in details to develop effective preventive measures against violent behaviors occurring at work.

  9. Correcting underwater images distorted by surface waves

    Science.gov (United States)

    Savchenko, V. V.; Osadchy, V. Yu.; Levin, I. M.

    2008-12-01

    An experiment on the correction of underwater images distorted by waves at the air-water interface was conducted using a laboratory modeling installation intended for experimental examination of light and image transfer across a water surface covered with waves. A digital color camera was used for the simultaneous formation of the image of the underwater test object through the disturbed surface and of the superimposed glitter pattern. Both images are spectrally separated. Processing the glitter pattern makes it possible to obtain the values of the surface slopes at a limited number of points and to use these slopes for retrieval of image fragments. The total corrected image is formed by integration of about 300 partially corrected fragments. This image is close to that obtained through a wave-free water surface.

  10. Correction: An Indicator of Media Credibility

    Directory of Open Access Journals (Sweden)

    Gordana Vilović

    2010-12-01

    Full Text Available The regularity of publishing corrections, clarifi cations, and letters to the editor, entail a high level of respect among the media for their audiences as they signify accountability and media credibility.This study began on the general assumption that the Croatian media is reluctant to publish corrections regularly, projecting an image that errors simply do not occur. Certainly errorless reporting is impossible due to fact that journalism is a profession prone to human error. Therefore, this study has enacted a content analysis methodology to follow the four primary Croatian daily newspapers, Jutarnji list, Večernji list, 24 sata and Vjesnik, for the period between May 6 and 30, 2010. The primary conclusion is that Croatian newspaper editors are hesitant to publish corrections if they are not under pressure from the Media Law.

  11. Transition-state theory and dynamical corrections

    DEFF Research Database (Denmark)

    Henriksen, Niels Engholm; Hansen, Flemming Yssing

    2002-01-01

    . The correction factor due to non-adiabatic dynamics is considered in relation to the non-activated dissociative sticking of N-2 on Fe(111). For this process, conventional transition-state theory gives a sticking probability which is about 10 times too large (at T = 300 K). We estimate that the sticking......We consider conventional transition-state theory, and show how quantum dynamical correction factors can be incorporated in a simple fashion, as a natural extension of the fundamental formulation. Corrections due to tunneling and non-adiabatic dynamics are discussed, with emphasis on the latter...... probability is reduced by a factor of 2 due to non-adiabatic dynamics....

  12. Correctional Education Teachers' Teaching Competence and Use of ...

    African Journals Online (AJOL)

    Correctional Education Teachers' Teaching Competence and Use of Adult Learning Principles: Inmates and Teachers' Views in Selected Correctional ... Ethiopian Journal of Education and Sciences ... This study aimed at investigating teachers', inmate' and administrators' views on the practices of correctional education.

  13. When to use the Bonferroni correction.

    Science.gov (United States)

    Armstrong, Richard A

    2014-09-01

    The Bonferroni correction adjusts probability (p) values because of the increased risk of a type I error when making multiple statistical tests. The routine use of this test has been criticised as deleterious to sound statistical judgment, testing the wrong hypothesis, and reducing the chance of a type I error but at the expense of a type II error; yet it remains popular in ophthalmic research. The purpose of this article was to survey the use of the Bonferroni correction in research articles published in three optometric journals, viz. Ophthalmic & Physiological Optics, Optometry & Vision Science, and Clinical & Experimental Optometry, and to provide advice to authors contemplating multiple testing. Some authors ignored the problem of multiple testing while others used the method uncritically with no rationale or discussion. A variety of methods of correcting p values were employed, the Bonferroni method being the single most popular. Bonferroni was used in a variety of circumstances, most commonly to correct the experiment-wise error rate when using multiple 't' tests or as a post-hoc procedure to correct the family-wise error rate following analysis of variance (anova). Some studies quoted adjusted p values incorrectly or gave an erroneous rationale. Whether or not to use the Bonferroni correction depends on the circumstances of the study. It should not be used routinely and should be considered if: (1) a single test of the 'universal null hypothesis' (Ho ) that all tests are not significant is required, (2) it is imperative to avoid a type I error, and (3) a large number of tests are carried out without preplanned hypotheses. © 2014 The Authors Ophthalmic & Physiological Optics © 2014 The College of Optometrists.

  14. Crossing conditions in coupled cluster theory

    Science.gov (United States)

    Kjønstad, Eirik F.; Myhre, Rolf H.; Martínez, Todd J.; Koch, Henrik

    2017-10-01

    We derive the crossing conditions at conical intersections between electronic states in coupled cluster theory and show that if the coupled cluster Jacobian matrix is nondefective, two (three) independent conditions are correctly placed on the nuclear degrees of freedom for an inherently real (complex) Hamiltonian. Calculations using coupled cluster theory on a 21A'/31A' conical intersection in hypofluorous acid illustrate the nonphysical artifacts associated with defects at accidental same-symmetry intersections. In particular, the observed intersection seam is folded about a space of the correct dimensionality, indicating that minor modifications to the theory are required for it to provide a correct description of conical intersections in general. We find that an accidental symmetry allowed 11A″/21A″ intersection in hydrogen sulfide is properly described, showing no artifacts as well as linearity of the energy gap to first order in the branching plane.

  15. Corrective Action Investigation Plan for Corrective Action Unit 166: Storage Yards and Contaminated Materials, Nevada Test Site, Nevada, Rev. No.: 0

    Energy Technology Data Exchange (ETDEWEB)

    David Strand

    2006-06-01

    Corrective Action Unit 166 is located in Areas 2, 3, 5, and 18 of the Nevada Test Site, which is 65 miles northwest of Las Vegas, Nevada. Corrective Action Unit (CAU) 166 is comprised of the seven Corrective Action Sites (CASs) listed below: (1) 02-42-01, Cond. Release Storage Yd - North; (2) 02-42-02, Cond. Release Storage Yd - South; (3) 02-99-10, D-38 Storage Area; (4) 03-42-01, Conditional Release Storage Yard; (5) 05-19-02, Contaminated Soil and Drum; (6) 18-01-01, Aboveground Storage Tank; and (7) 18-99-03, Wax Piles/Oil Stain. These sites are being investigated because existing information on the nature and extent of potential contamination is insufficient to evaluate and recommend corrective action alternatives. Additional information will be obtained by conducting a corrective action investigation (CAI) before evaluating corrective action alternatives and selecting the appropriate corrective action for each CAS. The results of the field investigation will support a defensible evaluation of viable corrective action alternatives that will be presented in the Corrective Action Decision Document. The sites will be investigated based on the data quality objectives (DQOs) developed on February 28, 2006, by representatives of the Nevada Division of Environmental Protection; U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office; Stoller-Navarro Joint Venture; and Bechtel Nevada. The DQO process was used to identify and define the type, amount, and quality of data needed to develop and evaluate appropriate corrective actions for CAU 166. Appendix A provides a detailed discussion of the DQO methodology and the DQOs specific to each CAS. The scope of the CAI for CAU 166 includes the following activities: (1) Move surface debris and/or materials, as needed, to facilitate sampling. (2) Conduct radiological surveys. (3) Perform field screening. (4) Collect and submit environmental samples for laboratory analysis to determine if

  16. Mixed-Precision Spectral Deferred Correction: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Grout, Ray W. S.

    2015-09-02

    Convergence of spectral deferred correction (SDC), where low-order time integration methods are used to construct higher-order methods through iterative refinement, can be accelerated in terms of computational effort by using mixed-precision methods. Using ideas from multi-level SDC (in turn based on FAS multigrid ideas), some of the SDC correction sweeps can use function values computed in reduced precision without adversely impacting the accuracy of the final solution. This is particularly beneficial for the performance of combustion solvers such as S3D [6] which require double precision accuracy but are performance limited by the cost of data motion.

  17. Radiative Corrections to Bremsstrahlung in Radiative Return

    CERN Document Server

    Yost, S A; Ward, B F L; Yost, Scott A.

    2005-01-01

    Radiating a photon from the initial state provides a useful tool for studying a range of low energy physics using a high-energy e+ e- accelerator. Accurate results require careful calculation of the first order virtual photon corrections. We compare exact results for initial state radiative corrections, finding agreement to an order of 10^{-5} or better as a fraction of the Born cross-section for most of the range of photon energies, at CMS energies relevant in both high-energy collision and radiative return experiments.

  18. Quantum error correction in superconducting circuits

    Science.gov (United States)

    Devoret, Michel

    Can we prolong the coherence of a two-state manifold in a complex quantum system beyond the coherence of its longest-lived component? This question is the starting point of the main challenges in the construction of a scalable quantum computer, namely the implementation of quantum error correction. The presentation will review the experimental progress that recently occurred in the field of superconducting quantum circuits towards the correction, for a full logical qubit memory, of the combinations of bit flip and phase flip errors. Work supported by ARO and YINQE.

  19. Radiative corrections to virtual Compton scattering

    Energy Technology Data Exchange (ETDEWEB)

    Marchand, D.; Lhuillier, D.; Wanderhaeghen, M. [CEA Centre d`Etudes de Saclay, 91 - Gif-sur-Yvette (France). Dept. d`Astrophysique, de la Physique des Particules, de la Physique Nucleaire et de l`Instrumentation Associee; Van de Wiele, J. [Paris-11 Univ., 91 - Orsay (France). Inst. de Physique Nucleaire

    1996-12-31

    Radiative corrections to virtual Compton scattering are calculated for the first time at the first order in {alpha}. We use the dimensional regularization scheme to treat both Ultra-Violet and Indra-Red divergences. After the compensation of divergences, the expression of the correction contains analytical terms and a numerical term which has to be computed. For a scattered photon of centre of mass energy q`= 45 MeV, a preliminary result of the comparison between theory and experimental data is presented taking into account only analytical terms. (authors). 10 refs.

  20. Computing correct truncated excited state wavefunctions

    Science.gov (United States)

    Bacalis, N. C.; Xiong, Z.; Zang, J.; Karaoulanis, D.

    2016-12-01

    We demonstrate that, if a wave function's truncated expansion is small, then the standard excited states computational method, of optimizing one "root" of a secular equation, may lead to an incorrect wave function - despite the correct energy according to the theorem of Hylleraas, Undheim and McDonald - whereas our proposed method [J. Comput. Meth. Sci. Eng. 8, 277 (2008)] (independent of orthogonality to lower lying approximants) leads to correct reliable small truncated wave functions. The demonstration is done in He excited states, using truncated series expansions in Hylleraas coordinates, as well as standard configuration-interaction truncated expansions.

  1. Corrective feedback via e-mail on the correct use of past tense ...

    African Journals Online (AJOL)

    panah

    2015-11-09

    Nov 9, 2015 ... voice recognition application on smartphones help language learners to exercise spoken Chinese. It can be stated that this approach elevates self- evaluation and interest in learning any language. This study investigates the effect of corrective feedback through e-mail on the correct use of the past forms of ...

  2. Differential Perceptions of Women Inmates, Correctional Staff, and Correctional Officers Regarding Rehabilitation Program Modalities.

    Science.gov (United States)

    Carlson, Joseph R.

    1997-01-01

    Examines perceptions among correctional officers, correctional staff, and women inmates of the most effective type of rehabilitative programs. Builds on an earlier paper focusing on women inmates' perceptions. Findings indicate that all three groups believed the majority of the programs currently offered to be either "Okay" or "Very…

  3. Comparison of non-attenuation corrected and attenuation corrected myocardial perfusion SPE

    Directory of Open Access Journals (Sweden)

    Hasan Raza

    2016-09-01

    Conclusion: This study demonstrates that CT based attenuation corrected Tc-99mm sestamibi SPECT myocardial perfusion imaging significantly improved the specificity of the RCA territory compared with non-attenuation corrected Tc-99mm sestamibi SPECT myocardial perfusion imaging in both genders irrespective of BMI.

  4. Corrective feedback via e-mail on the correct use of past tense ...

    African Journals Online (AJOL)

    Corrective feedback via e-mail on the correct use of past tense among Iranian EFL learners. ... South African Journal of Education ... Feedback strategy provides teachers with information on effective teaching and student comprehension, and encourages them to use technology in a way that reduces anxiety and facilitates ...

  5. New attenuation correction for the HRRT using transmission scatter correction and total variation regularization

    DEFF Research Database (Denmark)

    Sibomana, Merence; Keller, Sune Høgild; Svarer, Claus

    2009-01-01

    , it introduces the use of scatter correction, and secondly, it uses a simple threshold in combination with nonlinear total variation μ-map filtering. To validate the new transmission μ-map reconstruction with scatter correction and TXTV segmentation, we compared the average activity in 50 RoIs average...

  6. Relative amplitude preservation processing utilizing surface consistent amplitude correction. Part 3; Surface consistent amplitude correction wo mochiita sotai shinpuku hozon shori. 3

    Energy Technology Data Exchange (ETDEWEB)

    Saeki, T. [Japan National Oil Corporation, Tokyo (Japan). Technology Research Center

    1996-10-01

    For the seismic reflection method conducted on the ground surface, generator and geophone are set on the surface. The observed waveforms are affected by the ground surface and surface layer. Therefore, it is required for discussing physical properties of the deep underground to remove the influence of surface layer, preliminarily. For the surface consistent amplitude correction, properties of the generator and geophone were removed by assuming that the observed waveforms can be expressed by equations of convolution. This is a correction method to obtain records without affected by the surface conditions. In response to analysis and correction of waveforms, wavelet conversion was examined. Using the amplitude patterns after correction, the significant signal region, noise dominant region, and surface wave dominant region would be separated each other. Since the amplitude values after correction of values in the significant signal region have only small variation, a representative value can be given. This can be used for analyzing the surface consistent amplitude correction. Efficiency of the process can be enhanced by considering the change of frequency. 3 refs., 5 figs.

  7. Can the red-green duochrome test be used prior to correcting the refractive cylinder component?

    Directory of Open Access Journals (Sweden)

    Liat Gantz

    Full Text Available A primary task of the eye care professional is determining the refraction, or optical correction, of a patient. The duochrome red-green test is a standard tool for verification of the final refraction. Traditionally, it is recommended for use both prior to and subsequent to determining the cylindrical or astigmatic component of the refraction. In order for it to be effective when used before correcting the cylinder it is necessary that the COLC (Circle of Least Confusion be on the retina. This study examined whether it is necessarily true that the duochrome response in uncorrected astigmatism will be as trust-worthy as it is with corrected cylinders.The red-green examination was performed monocularly under the following three conditions: a. fully corrected refraction for the subgroup of eyes that had spherical refractions and for the subgroup of eyes with sphero-cylindrical refractions. b. best sphere-only correction without cylinder correction in sphero-cylindrical eyes c. an induced cylinder error in spherical eyes. The interval between the last "red" response and the first "green" response for the right eyes as a group and separately for the physiological cylinder and induced cylinder correction sub-groups was calculated and compared using a paired, two-tailed t-test.The intervals between "red" and "green" responses were not significantly different in the population as a whole and in the uncorrected physiological cylinder and induced cylinder subgroups examined.Based on the finding that the interval of red-green equality with fully corrected cylinder and without the cylindrical correction are not significantly different, the red-green duochrome test can indeed be used both before and after cylindrical correction.

  8. An Assessment of Drift Correction Alternatives for CMIP5 Decadal Predictions

    Science.gov (United States)

    Choudhury, Dipayan; Sen Gupta, Alexander; Sharma, Ashish; Mehrotra, Rajeshwar; Sivakumar, Bellie

    2017-10-01

    Drift correction is an important step before using the outputs of decadal prediction experiments and has seen considerable research. However, most drift correction studies consider a relatively small sample of variables and models. Here, we present a systematic application of the existing drift correction strategies for decadal predictions of various sea surface temperature-based metrics from a suite of five state-of-the-art climate models (CanCM4i1, GFDL-CM2.1, HadCM3i2&i3, MIROC5, and MPI-ESM-LR). The best method of drift correction for each metric and model is reported. Preliminary analysis suggests that there is no single method of drift correction that consistently performs best. Initial condition-based drift correction provides the lowest errors in most regions for MIROC5 and the two HadCM3 models, whereas the trend-based drift correction produces lowest errors for CanCM4i1, GFDL-CM2.1, and MPI-ESM-LR over the largest share of the area. There is no merit in using a k-nearest neighbor approach for these drift correction methods. Further, in almost all cases, the multimodel ensemble outperforms the individual models, and thus, the study conclusively suggests using forecasts based on multimodel averages. We also show some additional benefit to be gained by drift correcting each model/metric using their best correction method prior to model averaging and suggest that the results presented here would help potential users expend time and resources judiciously while dealing with outputs from these experiments.

  9. Correctional nursing competency development in the Connecticut Correctional Managed Health Care program.

    Science.gov (United States)

    Shelton, Deborah; Weiskopf, Constance; Nicholson, Michael

    2010-10-01

    This article reports on a work group process that aimed to articulate the American Nurses Association (ANA) standards of correctional nursing practice in the Connecticut Department of Correction. When recruiting nurses for prison health care, few candidates possess enough experience in all of the related fields, and even experienced nurses are seldom prepared for the environment and its challenging population. A public-academic partnership provided a model for collaboration. Workforce development methods used in the United Kingdom for correctional nursing were combined with the ANA professional development model. An incremental implementation plan was designed. Orientation checklists and methods to assure entry-level baseline competencies, resource manuals, supervisor packets, and evaluation strategies were developed. The group process was as important as the products it developed. The pathway toward the future of the correctional nursing workforce begins with articulation of correctional nursing competencies.

  10. Photometric Lambert Correction for Global Mosaicking of HRSC Data

    Science.gov (United States)

    Walter, Sebastian; Michael, Greg; van Gasselt, Stephan; Kneissl, Thomas

    2015-04-01

    The High Resolution Stereo Camera (HRSC) is a push-broom image sensor onboard Mars Express recording the Martian surface in 3D and color. Being in orbit since 2004, the camera has obtained over 3,600 panchromatic image sequences covering about 70% of the planet's surface at 10-20 m/pixel. The composition of an homogenous global mosaic is a major challenge due to the strong elliptical and highly irregular orbit of the spacecraft, which often results in large variations of illumination and atmospheric conditions between individual images. For the purpose of a global mosaic in the full Nadir resolution of 12.5 m per pixel we present a first-order systematic photometric correction for the individual image sequences based on a Lambertian reflection model. During the radiometric calibration of the HRSC data, values for the reflectance scaling factor and the reflectance offset are added to the individual image labels. These parameters can be used for a linear transformation from the original DN values into spectral reflectance values. The spectral reflectance varies with the solar incidence angle, topography (changing the local incidence angle and therefore adding an exta geometry factor for each ground pixel), the bi-directional reflectance distribution function (BRDF) of the surface, and atmospheric effects. Mosaicking the spectral values together as images sometimes shows large brightness differences. One major contributor to the brightness differences between two images is the differing solar geometry due to the varying time of day when the individual images were obtained. This variation causes two images of the same or adjacent areas to have different image brightnesses. As a first-order correction for the varying illumination conditions and resulting brightness variations, the images are corrected for the solar incidence angle by assuming an ideal diffusely reflecting behaviour of the surface. This correction requires the calculation of the solar geometry for each

  11. Surgical Correction of the Achilles Tendon for Diabetic Foot Ulcerations and Charcot Neuroarthropathy.

    Science.gov (United States)

    Ramanujam, Crystal L; Zgonis, Thomas

    2017-04-01

    Achilles tendon pathologic conditions are implicated in contributing to the development of many diabetic foot complications including diabetic foot ulceration and Charcot neuroarthropathy. Surgical correction of the diabetic equinus deformity has been studied as an isolated or adjunctive treatment when dealing with difficult-to-close diabetic foot ulcerations or when surgically addressing the diabetic Charcot neuroarthropathy foot or ankle. This article reviews the most common indications, complications, and surgical procedures for equinus correction by either a tendo-Achilles lengthening or gastrocnemius recession for the management of diabetic foot conditions. Copyright © 2016 Elsevier Inc. All rights reserved.

  12. Low-dose aberration corrected cryo-electron microscopy of organic specimens.

    Science.gov (United States)

    Evans, James E; Hetherington, Crispin; Kirkland, Angus; Chang, Lan-Yun; Stahlberg, Henning; Browning, Nigel

    2008-11-01

    Spherical aberration (C(s)) correction in the transmission electron microscope has enabled sub-angstrom resolution imaging of inorganic materials. To achieve similar resolution for radiation-sensitive organic materials requires the microscope to be operated under hybrid conditions: low electron dose illumination of the specimen at liquid nitrogen temperature and low defocus values. Initial images from standard inorganic and organic test specimens have indicated that under these conditions C(s)-correction can provide a significant improvement in resolution (to less than 0.16nm) for direct imaging of organic samples.

  13. Illumination correction in psoriasis lesions images

    DEFF Research Database (Denmark)

    Maletti, Gabriela Mariel; Ersbøll, Bjarne Kjær

    2003-01-01

    An approach to automatically correct illumination problems in dermatological images is presented. The illumination function is estimated after combining the thematic map indicating skin-produced by an automated classification scheme- with the dermatological image data. The user is only required t...

  14. Correct nomenclature for the Angadimogar pluton, Kerala ...

    Indian Academy of Sciences (India)

    Home; Journals; Journal of Earth System Science; Volume 115; Issue 2. Correct nomenclature for the Angadimogar pluton, Kerala, southwestern India. H M Rajesh. Volume 115 Issue 2 ... Author Affiliations. H M Rajesh1. Graduate School of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan.

  15. 78 FR 15877 - Taxable Medical Devices; Correction

    Science.gov (United States)

    2013-03-13

    ... Internal Revenue Service 26 CFR Part 48 RIN 1545-BJ44 Taxable Medical Devices; Correction AGENCY: Internal... certain medical devices, enacted by the Health Care and Education Reconciliation Act of 2010 in..., under the paragraph heading ``A. Proposed Regulations'', line 6, the language ``of taxable medical...

  16. 78 FR 15878 - Taxable Medical Devices; Correction

    Science.gov (United States)

    2013-03-13

    ... Internal Revenue Service 26 CFR Part 48 RIN 1545-BJ44 Taxable Medical Devices; Correction AGENCY: Internal... certain medical devices, enacted by the Health Care and Education Reconciliation Act of 2010 in...., Example 11., and Example 13. The revisions read as follows: Sec. 48.4191-2 Taxable medical device...

  17. Medical makeup: the correction of hyperpigmentation disorders.

    Science.gov (United States)

    Nonni, J

    2012-12-01

    Medical makeup corrects skin tone imperfections with dermocosmetic products, which bring together tolerance efficacy, colour neutralization and sun protection. Highly suitable for imperfections caused by hyperpigmentation, it allows patients affected by these disorders to cover them up effectively and discretely, giving them a better quality of life. Copyright © 2012 Elsevier Masson SAS. All rights reserved.

  18. The Mentally Retarded Offender and Corrections.

    Science.gov (United States)

    Santamour, Miles; West, Bernadette

    The booklet provides an overview of the issues involved in correctional rehabilitation for the mentally retarded offender. Reviewed are clinical and legal definitions of criminal behavior and retardation, and discussed are such issues as law enforcement and court proceedings problems, pros and cons of special facilities, labeling, normalization,…

  19. 78 FR 59798 - Small Business Subcontracting: Correction

    Science.gov (United States)

    2013-09-30

    ... ADMINISTRATION 13 CFR Part 125 RIN 3245-AG22 Small Business Subcontracting: Correction AGENCY: U.S. Small..., 2013 (78 FR 42391). The document amended SBA's regulations governing small business subcontracting to...-16967.pdf ). SBA published a final rule on subcontracting to implement provisions of the Small Business...

  20. Consecutive exotropia following surgically corrected cyclic esotropia.

    Science.gov (United States)

    Post, Joel; Eidsness, Ryan B; Romanchuk, Kenneth G

    2007-01-01

    Cyclic esotropia is a rare form of strabismus consisting of regular intervals of esotropia alternating with periods of orthophoria in a rhythmic/cyclic manner. In the vast majority of cases, surgery appears to permanently correct the esotropia, with no sequelae after years of follow-up. We report a case of consecutive exotropia in a patient five years after bilateral medial rectus recessions for cyclic esotropia. A case report involving review of a clinical chart. A two-year-old male presented with right esotropia and mild amblyopia. He was treated with patching and following resolution of the amblyopia he developed a cyclic esotropia. Surgical correction was performed for the full amount measured on a "manifest" day. Following the surgery, he was orthophoric and demonstrated binocular vision. He remained stable for five years, and then returned with occasional diplopia and an intermittent exotropia. Cyclic esotropia is a rare disorder of ocular motility that spontaneously appears and disappears at regular intervals. After surgical correction, the deviation disappears and recurrence of esotropia is very infrequent. We present the first reported case of consecutive exotropia following surgical correction of a cyclic esotropia.

  1. New corrections for old control charts

    NARCIS (Netherlands)

    Albers, Willem/Wim; Kallenberg, W.C.M.

    2003-01-01

    When using standard control charts, typically several parameters need to be estimated. For the usual sample sizes, this is known to affect the performance of the chart. Here we present simple corrections to solve this problem. As a basis we use existing factors which are widely used for the

  2. Short scar correction of the tuberous breast.

    Science.gov (United States)

    Ribeiro, Liacyr; Accorsi, Affonso; Buss, Affonso; Pessĵa, Marcelo Castro Marçal

    2002-07-01

    This article describes the author's technique-an alternative form of short scar correction of tuberous breast. The historical background that suports the technique is described as well as the surgical sequence. Illustrative cases and postoperative results reached by author's technique are shown.

  3. Electromagnetic fields with vanishing quantum corrections

    Czech Academy of Sciences Publication Activity Database

    Ortaggio, Marcello; Pravda, Vojtěch

    2018-01-01

    Roč. 779, 10 April (2018), s. 393-395 ISSN 0370-2693 R&D Projects: GA ČR GA13-10042S Institutional support: RVO:67985840 Keywords : nonlinear electrodynamics * quantum corrections Subject RIV: BA - General Mathematics Impact factor: 4.807, year: 2016 https://www.sciencedirect.com/science/ article /pii/S0370269318300327?via%3Dihub

  4. Primordial tensor modes from quantum corrected inflation

    DEFF Research Database (Denmark)

    Joergensen, Jakob; Sannino, Francesco; Svendsen, Ole

    2014-01-01

    We analyze quantum corrections on the naive $\\phi^4$-Inflation. These typically lead to an inflaton potential which carries a non-integer power of the field. We consider both minimal and non-minimal couplings to gravity. For the latter case we also study unitarity of inflaton-inflaton scattering...

  5. Correcting abnormal speaking through communication partners ...

    African Journals Online (AJOL)

    The listed characteristics are called speech disorders. Abnormal speaking attracts some penalties to the speaker. The penalties are usually very disturbing to the speaker that undertaking some therapeutic measures becomes inevitable. Communication partners strategy is a speech correction approach which makes use of ...

  6. Off-Angle Iris Correction Methods

    Energy Technology Data Exchange (ETDEWEB)

    Santos-Villalobos, Hector J [ORNL; Thompson, Joseph T [ORNL; Karakaya, Mahmut [ORNL; Boehnen, Chris Bensing [ORNL

    2016-01-01

    In many real world iris recognition systems obtaining consistent frontal images is problematic do to inexperienced or uncooperative users, untrained operators, or distracting environments. As a result many collected images are unusable by modern iris matchers. In this chapter we present four methods for correcting off-angle iris images to appear frontal which makes them compatible with existing iris matchers. The methods include an affine correction, a retraced model of the human eye, measured displacements, and a genetic algorithm optimized correction. The affine correction represents a simple way to create an iris image that appears frontal but it does not account for refractive distortions of the cornea. The other method account for refraction. The retraced model simulates the optical properties of the cornea. The other two methods are data driven. The first uses optical flow to measure the displacements of the iris texture when compared to frontal images of the same subject. The second uses a genetic algorithm to learn a mapping that optimizes the Hamming Distance scores between off-angle and frontal images. In this paper we hypothesize that the biological model presented in our earlier work does not adequately account for all variations in eye anatomy and therefore the two data-driven approaches should yield better performance. Results are presented using the commercial VeriEye matcher that show that the genetic algorithm method clearly improves over prior work and makes iris recognition possible up to 50 degrees off-angle.

  7. Higher order corrections in perturbative quantum chromodynamics

    Indian Academy of Sciences (India)

    We present some techniques which have been developed recently or in the recent past to compute Feynman graphs beyond one-loop order. These techniques are useful to compute the three-loop splitting functions in QCD and to obtain the complete second order QED corrections to Bhabha scattering.

  8. Continuous-variable quantum erasure correcting code

    DEFF Research Database (Denmark)

    Lassen, Mikael Østergaard; Sabuncu, Metin; Huck, Alexander

    2010-01-01

    We experimentally demonstrate a continuous variable quantum erasure-correcting code, which protects coherent states of light against complete erasure. The scheme encodes two coherent states into a bi-party entangled state, and the resulting 4-mode code is conveyed through 4 independent channels...

  9. Performance Evaluation of Blind Tropospheric Delay correction ...

    African Journals Online (AJOL)

    lekky

    2.0 Description of tropospheric correction models adopted in this study. 2.1 Saastamoinen model. Saastamoinen (1972) applied the gas laws to refractivity by considering the atmosphere as a mixture of dry air and water vapour. The model considers the temperature in the troposphere as decreasing with increasing height at ...

  10. 76 FR 31221 - Truth in Lending; Correction

    Science.gov (United States)

    2011-05-31

    ... From the Federal Register Online via the Government Publishing Office FEDERAL RESERVE SYSTEM 12 CFR Part 226 RIN 7100-AD55 Truth in Lending; Correction AGENCY: Board of Governors of the Federal... April 25, 2011. The final rule amends Regulation Z, which implements the Truth in Lending Act, in order...

  11. 2012 edition JMBR - CORRECTION.cdr

    African Journals Online (AJOL)

    FinePrint

    healing, herbal therapy and urine therapy for the treatment of kidney disease. ... number, location, basic functions of the kidneys, common symptoms and causes of kidney disease as well as possible treatment modalities. The number of correct answers out of ten was ... and skin lightening cosmetics respectively. (Table 3).

  12. Corrections Education. Washington's Community and Technical Colleges

    Science.gov (United States)

    Washington State Board for Community and Technical Colleges, 2015

    2015-01-01

    The Washington State Department of Corrections contracts with community colleges to provide basic education and job training at each of the state's 12 adult prisons so upon release, individuals are more likely to get jobs and less likely to return. Washington State community colleges build a bridge for offenders to successfully re-enter…

  13. String loop corrected hypermultiplet moduli spaces

    NARCIS (Netherlands)

    Robles-Llana, D.; Saueressig, Frank; Vandoren, S.

    2006-01-01

    Using constraints from supersymmetry and string perturbation theory, we determine the string loop corrections to the hypermultiplet moduli space of type II strings compactified on a generic Calabi-Yau threefold. The corresponding quaternion-Kähler manifolds are completely encoded in terms of a

  14. Relativistic corrections to molecular dynamic dipole polarizabilities

    DEFF Research Database (Denmark)

    Kirpekar, Sheela; Oddershede, Jens; Jensen, Hans Jørgen Aagaard

    1995-01-01

    Using response function methods we report calculations of the dynamic isotropic polarizability of SnH4 and PbH4 and of the relativistic corrections to it in the random phase approximation and at the correlated multiconfigurational linear response level of approximation. All relativistic correctio...

  15. 45 CFR 1225.10 - Corrective action.

    Science.gov (United States)

    2010-10-01

    ... Trainee for aggrieved parties found to have been denied selection based on prohibited discrimination. (b... VOLUNTEER DISCRIMINATION COMPLAINT PROCEDURE Processing Individual Complaints of Discrimination § 1225.10 Corrective action. When it has been determined by Final Agency Decision that the aggrieved party has been...

  16. Development Laboratory for Correctional Training. Final Report.

    Science.gov (United States)

    Southern Illinois Univ., Carbondale. Center for the Study of Crime, Delinquency and Corrections.

    This laboratory and research center for the training of correctional officers and personnel developed a program to provide: (1) a substantive framework of knowledge, (2) intensive training in learning principles, human behavior, communication procedures, and teaching techniques, and (3) practice in teaching under supervision for the in-service…

  17. Race Relations Training with Correctional Officers

    Science.gov (United States)

    Wittmer, Joe; And Others

    1976-01-01

    The model presented in this article is intended to assist correctional counselors and others in facilitating communication among prison guards of a different race from inmates and, further, to illustrate how to train guards in the fundamentals of developing a helping relationship with inmates. (Author)

  18. Burnout among Prison Caseworkers and Corrections Officers

    Science.gov (United States)

    Carlson, Joseph R.; Thomas, George

    2006-01-01

    The purpose of this paper is to compare burnout between prison caseworkers and correctional officers and examine reasons for the high turnover of caseworkers. The study was conducted through surveys at a maximum/medium men's prison and at an all security level women's prison in the Midwest. By using the Maslach Burnout Inventory, it was found that…

  19. Power corrections and event shapes at LEP

    CERN Document Server

    Sanders, Michiel P

    2000-01-01

    Measurements of event shape variables from hadronic events collected by the LEP experiments, corresponding to hadronic center of mass energies between 30 GeV and 202 GeV are presented. Fits are performed to extract a, and the effective infrared strong coupling o with the power correction ansatz. Universality is observed for the effective coupling and comparisons are made with fragmentation models.

  20. Anisotropy and scaling corrections in turbulence

    NARCIS (Netherlands)

    Lohse, Detlef; Mueller-Groeling, Axel

    1996-01-01

    We analyze second-order turbulent velocity moments both in r and in p space. Finite size corrections induce dramatic differences between local r- and p-space scaling exponents. As analytically accessible examples we focus on two popular parametrizations: the Batchelor parametrization for the r-space

  1. Publisher Correction: Mergeable nervous systems for robots.

    Science.gov (United States)

    Mathews, Nithin; Christensen, Anders Lyhne; O'Grady, Rehan; Mondada, Francesco; Dorigo, Marco

    2017-11-21

    The original version of this Article contained an error in the author contributions section, whereby credit for design of the experiments was not attributed to N.M. This error has now been corrected in both the PDF and HTML versions of the Article.

  2. 78 FR 4766 - Authority Citation Correction

    Science.gov (United States)

    2013-01-23

    ... COMMISSION 17 CFR Part 200 Authority Citation Correction AGENCY: Securities and Exchange Commission. ACTION... citation. The Commission is publishing this technical amendment to accurately reflect the authority citation in the Code of Federal Regulations. DATES: Effective Date: January 23, 2013. FOR FURTHER...

  3. Study Of Compressibility Corrections To Turbulence Models

    Science.gov (United States)

    Viegas, J. R.; Rubesin, M. W.

    1993-01-01

    Effects on shear layers in simulated confined and unconfined flows studied. Report presents comparative study of some terms that correct for effects of compressibility in standard k-epsilon mathematical model of turbulence where k denotes turbulence kinetic energy and epsilon denotes rate of dissipation of turbulence kenetic energy. Involved simulation of flows by numerical solution of Reynolds-averaged Navier-Stokes equations.

  4. Correction to Rothermund et al. (2005)

    Science.gov (United States)

    Rothermund, Klaus; Wentura, Dirk; De Houwer, Jan

    2005-01-01

    This article reports an error in the article "Retrieval of Incidental Stimulus-Response Associations as a Source of Negative Priming" by Rothermund et al. ("Journal of Experimental Psychology: Learning, Memory, and Cognition," Vol 31(3) May 2005, 482-495). Table 1 (p. 484) was incorrectly typeset. The correct layout is provided. (The following…

  5. Image correction in magneto-optical microscopy

    DEFF Research Database (Denmark)

    Paturi, P.; Larsen, B.H.; Jacobsen, B.A.

    2003-01-01

    An image-processing procedure that assures correct determination of the magnetic field distribution of magneto-optical images is presented. The method remedies image faults resulting from sources that are proportional to the incident light intensity, such as different types of defects...

  6. Proving correctness of compilers using structured graphs

    DEFF Research Database (Denmark)

    Bahr, Patrick

    2014-01-01

    We present an approach to compiler implementation using Oliveira and Cook’s structured graphs that avoids the use of explicit jumps in the generated code. The advantage of our method is that it takes the implementation of a compiler using a tree type along with its correctness proof and turns...

  7. Correction to Cantor et al. (2005)

    Science.gov (United States)

    Cantor, James M.; Blanchard, Ray; Robichaud, Lori K.; Christensen, Bruce K.

    2005-01-01

    This paper reports an error in the original article by James M. Cantor, Ray Blanchard, Lori K. Robichaud, and Bruce K. Christensen ("Psychological Bulletin," 2005, Vol. 131, No. 4, pp. 555-568). As a result of an editorial error the article listed the link to online supplemental data incorrectly. The correct URL is provided here. (The following…

  8. Higher order corrections in perturbative quantum chromodynamics

    Indian Academy of Sciences (India)

    to compute Feynman graphs beyond one-loop order. These techniques are useful to compute the three-loop splitting functions in QCD and to obtain the complete second order QED corrections to. Bhabha scattering. ..... ¾ into the following special functions [9] given by the hyper-geometric functions. ¾F½, ¿F¾, the Appell ...

  9. 78 FR 51678 - Voluntary Education Programs; Correction

    Science.gov (United States)

    2013-08-21

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF DEFENSE 32 CFR Part 68 RIN 0790-AJ06 Voluntary Education Programs; Correction AGENCY: Office of the Under Secretary of... Education Programs. Subsequent to the publication of the proposed rule in the Federal Register, DoD...

  10. The Mathematics of Error Correcting Quantum Codes

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 6; Issue 3. The Mathematics of Error Correcting-Quantum Codes - Quantum Probability. K R Parthasarathy. General Article Volume 6 Issue 3 March 2001 pp 34-45. Fulltext. Click here to view fulltext PDF. Permanent link:

  11. Notions of "Error" and Appropriate Corrective Treatment.

    Science.gov (United States)

    Lee, Nancy

    1990-01-01

    The relationship between the notion of "error" in linguistics and language teaching theory and its potential application to error correction in the second language classroom is examined. Definitions of "error" in psycholinguistics, native speech, and English second language instruction are discussed, and the relationship of interlanguage…

  12. [Medical makeup: the correction of hyperpigmentation disorders].

    Science.gov (United States)

    Nonni, J

    2012-11-01

    Medical makeup corrects skin tone imperfections with dermo-cosmetic products, which bring together tolerance efficacy, colour neutralization and sun protection. Highly suitable for imperfections caused by hyperpigmentation, it allows patients affected by these disorders to cover them up effectively and discretely, giving them a better quality of life. Copyright © 2012 Elsevier Masson SAS. All rights reserved.

  13. THE COMPUTATION OF LVL CORRECTION PARAMETERS IN ...

    African Journals Online (AJOL)

    The parameters so computed are important to the exploration seismologist especially in determining the time delays needed for static corrections during seismic reflection data processing. Also, depth to which energy sources can be buried is known and the bearing capacity of the foundation rock for civil engineering works ...

  14. Quantum-electrodynamics corrections in pionic hydrogen

    NARCIS (Netherlands)

    Schlesser, S.; Le Bigot, E. -O.; Indelicato, P.; Pachucki, K.

    2011-01-01

    We investigate all pure quantum-electrodynamics corrections to the np --> 1s, n = 2-4 transition energies of pionic hydrogen larger than 1 meV, which requires an accurate evaluation of all relevant contributions up to order alpha 5. These values are needed to extract an accurate strong interaction

  15. Model error estimation and correction by solving a inverse problem

    Science.gov (United States)

    Xue, Haile

    2016-04-01

    Nowadays, the weather forecasts and climate predictions are increasingly relied on numerical models. Yet, errors inevitably exist in model due to the imperfect numeric and parameterizations. From the practical point of view, model correction is an efficient strategy. Despite of the different complexity of forecast error correction algorithms, the general idea is to estimate the forecast errors by considering the NWP as a direct problem. Chou (1974) suggested an alternative view by considering the NWP as an inverse problem. The model error tendency term (ME) due to the model deficiency is assumed as an unknown term in NWP model, which can be discretized into short intervals (for example 6 hour) and considered as a constant or linear form in each interval. Given the past re-analyses and NWP model, the discretized MEs in the past intervals can be solved iteratively as a constant or linear-increased tendency term in each interval. These MEs can be further used as the online corrections. In this study, an iterative method for obtaining the MEs in past intervals was presented, and its convergence had been confirmed with sets of experiments in the global forecast system of the Global and Regional Assimilation and Prediction System (GRAPES-GFS) for July-August (JA) 2009 and January-February (JF) 2010. Then these MEs were used to get online model corretions based of systematic errors of GRAPES-GFS for July 2009 and January 2010. The data sets associated with initial condition and sea surface temperature (SST) used in this study are both based on NCEP final (FNL) data. According to the iterative numerical experiments, the following key conclusions can be drawn:(1) Batches of iteration test results indicated that the hour 6 forecast errors were reduced to 10% of their original value after 20 steps of iteration.(2) By offlinely comparing the error corrections estimated by MEs to the mean forecast errors, the patterns of estimated errors were considered to agree well with those

  16. ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting Satellites

    Directory of Open Access Journals (Sweden)

    Jeongrae Kim

    2015-01-01

    Full Text Available For low earth orbit (LEO satellite GPS receivers, space-based augmentation system (SBAS ephemeris/clock corrections can be applied to improve positioning accuracy in real time. The SBAS correction is only available within its service area, and the prediction of the SBAS corrections during the outage period can extend the coverage area. Two time series forecasting models, autoregressive moving average (ARMA and autoregressive (AR, are proposed to predict the corrections outside the service area. A simulated GPS satellite visibility condition is applied to the WAAS correction data, and the prediction accuracy degradation, along with the time, is investigated. Prediction results using the SBAS rate of change information are compared, and the ARMA method yields a better accuracy than the rate method. The error reductions of the ephemeris and clock by the ARMA method over the rate method are 37.8% and 38.5%, respectively. The AR method shows a slightly better orbit accuracy than the rate method, but its clock accuracy is even worse than the rate method. If the SBAS correction is sufficiently accurate comparing with the required ephemeris accuracy of a real-time navigation filter, then the predicted SBAS correction may improve orbit determination accuracy.

  17. A temperature error correction method for a naturally ventilated radiation shield

    Science.gov (United States)

    Yang, Jie; Liu, Qingquan; Dai, Wei; Ding, Rrenhui

    2016-11-01

    Due to solar radiation exposure, air flowing inside a naturally ventilated radiation shield may produce a measurement error of 0.8 °C or higher. To improve the air temperature observation accuracy, a temperature error correction method is proposed. The correction method is based on a Computational Fluid Dynamics (CFD) method and a Genetic Algorithm (GA) method. The CFD method is implemented to analyze and calculate the temperature errors of a naturally ventilated radiation shield under various environmental conditions. Then, a temperature error correction equation is obtained by fitting the CFD results using the GA method. To verify the performance of the correction equation, the naturally ventilated radiation shield and an aspirated temperature measurement platform are characterized in the same environment to conduct the intercomparison. The aspirated temperature measurement platform serves as an air temperature reference. The mean temperature error given by measurements is 0.36 °C, and the mean temperature error given by correction equation is 0.34 °C. This correction equation allows the temperature error to be reduced by approximately 95%. The mean absolute error (MAE) and the root mean square error (RMSE) between the temperature errors given by the correction equation and the temperature errors given by the measurements are 0.07 °C and 0.08 °C, respectively.

  18. Experimental analysis of correction factors for reference dosimetry in a magnetic field

    Directory of Open Access Journals (Sweden)

    Brand Nicole

    2017-09-01

    Full Text Available Today, hybrid systems of linear accelerator and MRI scanner are clinically available. Therefore it is important to investigate the feasibility of reference dosimetry with ionization chambers in the presence of a magnetic field and determine correction factors. In this work, correction factors under various conditions that influence the chamber response were experimentally investigated, using a conventional 6 MV linear accelerator together with a stand-alone magnet. We found that the correction factor for a PTW31010 ionization chamber ranges from 0.9873 to 1.009 depending on the magnetic field strength, magnetic field orientation and magnetic field size. The phantom material also does have an influence on the measured signal. Therefore, reference dosimetry with ionization chambers in the presence of a magnetic field is feasible, but requires dedicated correction factors, which depend on the experimental setup.

  19. Realization of three-qubit quantum error correction with superconducting circuits.

    Science.gov (United States)

    Reed, M D; DiCarlo, L; Nigg, S E; Sun, L; Frunzio, L; Girvin, S M; Schoelkopf, R J

    2012-02-01

    Quantum computers could be used to solve certain problems exponentially faster than classical computers, but are challenging to build because of their increased susceptibility to errors. However, it is possible to detect and correct errors without destroying coherence, by using quantum error correcting codes. The simplest of these are three-quantum-bit (three-qubit) codes, which map a one-qubit state to an entangled three-qubit state; they can correct any single phase-flip or bit-flip error on one of the three qubits, depending on the code used. Here we demonstrate such phase- and bit-flip error correcting codes in a superconducting circuit. We encode a quantum state, induce errors on the qubits and decode the error syndrome--a quantum state indicating which error has occurred--by reversing the encoding process. This syndrome is then used as the input to a three-qubit gate that corrects the primary qubit if it was flipped. As the code can recover from a single error on any qubit, the fidelity of this process should decrease only quadratically with error probability. We implement the correcting three-qubit gate (known as a conditional-conditional NOT, or Toffoli, gate) in 63 nanoseconds, using an interaction with the third excited state of a single qubit. We find 85 ± 1 per cent fidelity to the expected classical action of this gate, and 78 ± 1 per cent fidelity to the ideal quantum process matrix. Using this gate, we perform a single pass of both quantum bit- and phase-flip error correction and demonstrate the predicted first-order insensitivity to errors. Concatenation of these two codes in a nine-qubit device would correct arbitrary single-qubit errors. In combination with recent advances in superconducting qubit coherence times, this could lead to scalable quantum technology.

  20. 20 CFR 401.65 - How to correct your record.

    Science.gov (United States)

    2010-04-01

    ... correct it promptly. If wrong information was disclosed from the record, we will tell all those of whom we are aware received that information that it was wrong and will give them the correct information. This... AND INFORMATION The Privacy Act § 401.65 How to correct your record. (a) How to request a correction...

  1. 76 FR 5473 - Technical Corrections to the TTB Regulations

    Science.gov (United States)

    2011-02-01

    ... its regulations. These amendments correct grammatical, spelling and typographical errors, update cross... grammatical, spelling and typographical errors, correct or update form numbers, correct or update cross..., as well as to correct a minor grammatical error. Part 30 Section 30.32 is amended to revise an...

  2. Hydrodynamics from Landau initial conditions

    Energy Technology Data Exchange (ETDEWEB)

    Sen, Abhisek [University of Tennessee, Knoxville (UTK); Gerhard, Jochen [Frankfurt Institute for Advanced Studies (FIAS), Germany; Torrieri, Giorgio [Universidade Estadual de Campinas, Instituto de Física " Gleb Wataghin" (IFGW), Sao Paulo, Brazil; Read jr, Kenneth F. [University of Tennessee (UTK) and Oak Ridge National Laboratory (ORNL); Wong, Cheuk-Yin [ORNL

    2015-01-01

    We investigate ideal hydrodynamic evolution, with Landau initial conditions, both in a semi-analytical 1+1D approach and in a numerical code incorporating event-by-event variation with many events and transverse density inhomogeneities. The object of the calculation is to test how fast would a Landau initial condition transition to a commonly used boost-invariant expansion. We show that the transition to boost-invariant flow occurs too late for realistic setups, with corrections of O (20 - 30%) expected at freezeout for most scenarios. Moreover, the deviation from boost-invariance is correlated with both transverse flow and elliptic flow, with the more highly transversely flowing regions also showing the most violation of boost invariance. Therefore, if longitudinal flow is not fully developed at the early stages of heavy ion collisions, 2+1 dimensional hydrodynamics is inadequate to extract transport coefficients of the quark-gluon plasma. Based on [1, 2

  3. Rank Modulation for Translocation Error Correction

    CERN Document Server

    Farnoud, Farzad; Milenkovic, Olgica

    2012-01-01

    We consider rank modulation codes for flash memories that allow for handling arbitrary charge drop errors. Unlike classical rank modulation codes used for correcting errors that manifest themselves as swaps of two adjacently ranked elements, the proposed \\emph{translocation rank codes} account for more general forms of errors that arise in storage systems. Translocations represent a natural extension of the notion of adjacent transpositions and as such may be analyzed using related concepts in combinatorics and rank modulation coding. Our results include tight bounds on the capacity of translocation rank codes, construction techniques for asymptotically good codes, as well as simple decoding methods for one class of structured codes. As part of our exposition, we also highlight the close connections between the new code family and permutations with short common subsequences, deletion and insertion error-correcting codes for permutations and permutation arrays.

  4. G-corrected holographic dark energy model

    CERN Document Server

    Malekjani, M

    2013-01-01

    Here we investigate the holographic dark energy model in the framework of FRW cosmology where the Newtonian gravitational constant,$G$, is varying with cosmic time. Using the complementary astronomical data which support the time dependency of $G$, the evolutionary treatment of EoS parameter and energy density of dark energy model are calculated in the presence of time variation of $G$. It has been shown that in this case, the phantom regime can be achieved at the present time. We also calculate the evolution of $G$- corrected deceleration parameter for holographic dark energy model and show that the dependency of $G$ on the comic time can influence on the transition epoch from decelerated expansion to the accelerated phase. Finally we perform the statefinder analysis for $G$- corrected holographic model and show that this model has a shorter distance from the observational point in $s-r$ plane compare with original holographic dark energy model.

  5. Recoil corrections in antikaon-deuteron scattering

    Directory of Open Access Journals (Sweden)

    Mai Maxim

    2016-01-01

    Full Text Available Using the non-relativistic effective field theory approach for K−d scattering, it is demonstrated that a systematic perturbative expansion of the recoil corrections in the parameter ξ = MK/mN is possible in spite of the fact that K−d scattering at low energies is inherently non-perturbative due to the large values of the K̄N scattering lengths. The first order correction to the K−d scattering length due to single insertion of the retardation term in the multiple-scattering series is calculated. The recoil effect turns out to be reasonably small even at the physical value of MK/mN ≃ 0:5.

  6. Black Holes, Holography, and Quantum Error Correction

    CERN Multimedia

    CERN. Geneva

    2017-01-01

    How can it be that a local quantum field theory in some number of spacetime dimensions can "fake" a local gravitational theory in a higher number of dimensions?  How can the Ryu-Takayanagi Formula say that an entropy is equal to the expectation value of a local operator?  Why do such things happen only in gravitational theories?  In this talk I will explain how a new interpretation of the AdS/CFT correspondence as a quantum error correcting code provides satisfying answers to these questions, and more generally gives a natural way of generating simple models of the correspondence.  No familiarity with AdS/CFT or quantum error correction is assumed, but the former would still be helpful.  

  7. Self-correcting random number generator

    Energy Technology Data Exchange (ETDEWEB)

    Humble, Travis S.; Pooser, Raphael C.

    2016-09-06

    A system and method for generating random numbers. The system may include a random number generator (RNG), such as a quantum random number generator (QRNG) configured to self-correct or adapt in order to substantially achieve randomness from the output of the RNG. By adapting, the RNG may generate a random number that may be considered random regardless of whether the random number itself is tested as such. As an example, the RNG may include components to monitor one or more characteristics of the RNG during operation, and may use the monitored characteristics as a basis for adapting, or self-correcting, to provide a random number according to one or more performance criteria.

  8. Quantum corrections to holographic mutual information

    Energy Technology Data Exchange (ETDEWEB)

    Agón, Cesar A. [Martin Fisher School of Physics, Brandeis University,Waltham, MA 02453 (United States); Faulkner, Thomas [University of Illinois, Urbana-Champaign,Urbana, IL 61801-3080 (United States)

    2016-08-22

    We compute the leading contribution to the mutual information (MI) of two disjoint spheres in the large distance regime for arbitrary conformal field theories (CFT) in any dimension. This is achieved by refining the operator product expansion method introduced by Cardy http://dx.doi.org/10.1088/1751-8113/46/28/285402. For CFTs with holographic duals the leading contribution to the MI at long distances comes from bulk quantum corrections to the Ryu-Takayanagi area formula. According to the FLM proposal http://dx.doi.org/10.1007/JHEP11(2013)074 this equals the bulk MI between the two disjoint regions spanned by the boundary spheres and their corresponding minimal area surfaces. We compute this quantum correction and provide in this way a non-trivial check of the FLM proposal.

  9. Nurse researchers in corrections: a qualitative study.

    Science.gov (United States)

    Ferszt, Ginette G; Hickey, Joyce

    2013-01-01

    The United States has more people, per capita, in prisons and jails than any other country in the world. Because the prison population is largely composed of people who have been economically and socially disadvantaged, a very high percentage enter correctional facilities in poor health. Because of the large concentrated numbers of women, men, and youth in prisons and jails, an exceptional opportunity exists for nurses and other researchers to conduct creative and innovative research to improve the health care of this hard-to-reach population. The purpose of this study was to explore the experiences of nurse researchers who have been successful in conducting studies in different correctional settings. A qualitative descriptive design was used, and telephone interviews with 16 participants were completed. The participants described how they established credibility, the challenges they faced, and the unexpected personal and professional rewards they received. Recommendations for potential researchers will hopefully lead to an increase in research with this invisible population.

  10. Photobleaching correction in fluorescence microscopy images

    Energy Technology Data Exchange (ETDEWEB)

    Vicente, Nathalie B; Diaz Zamboni, Javier E; Adur, Javier F; Paravani, Enrique V; Casco, Victor H [Microscopy Laboratory, School of Engineering - Bioengineering, National University of Entre Rios (UNER), Ruta 11, Km 10 (3101), Oro Verde, Entre Rios (Argentina)

    2007-11-15

    Fluorophores are used to detect molecular expression by highly specific antigen-antibody reactions in fluorescence microscopy techniques. A portion of the fluorophore emits fluorescence when irradiated with electromagnetic waves of particular wavelengths, enabling its detection. Photobleaching irreversibly destroys fluorophores stimulated by radiation within the excitation spectrum, thus eliminating potentially useful information. Since this process may not be completely prevented, techniques have been developed to slow it down or to correct resulting alterations (mainly, the decrease in fluorescent signal). In the present work, the correction by photobleaching curve was studied using E-cadherin (a cell-cell adhesion molecule) expression in Bufo arenarum embryos. Significant improvements were observed when applying this simple, inexpensive and fast technique.

  11. Motion correction in thoracic positron emission tomography

    CERN Document Server

    Gigengack, Fabian; Dawood, Mohammad; Schäfers, Klaus P

    2015-01-01

    Respiratory and cardiac motion leads to image degradation in Positron Emission Tomography (PET), which impairs quantification. In this book, the authors present approaches to motion estimation and motion correction in thoracic PET. The approaches for motion estimation are based on dual gating and mass-preserving image registration (VAMPIRE) and mass-preserving optical flow (MPOF). With mass-preservation, image intensity modulations caused by highly non-rigid cardiac motion are accounted for. Within the image registration framework different data terms, different variants of regularization and parametric and non-parametric motion models are examined. Within the optical flow framework, different data terms and further non-quadratic penalization are also discussed. The approaches for motion correction particularly focus on pipelines in dual gated PET. A quantitative evaluation of the proposed approaches is performed on software phantom data with accompanied ground-truth motion information. Further, clinical appl...

  12. Empirical beam hardening correction (EBHC) for CT

    Energy Technology Data Exchange (ETDEWEB)

    Kyriakou, Yiannis; Meyer, Esther; Prell, Daniel; Kachelriess, Marc [Institute of Medical Physics, University of Erlangen-Nuernberg, 91052 Erlangen (Germany)

    2010-10-15

    Purpose: Due to x-ray beam polychromaticity and scattered radiation, attenuation measurements tend to be underestimated. Cupping and beam hardening artifacts become apparent in the reconstructed CT images. If only one material such as water, for example, is present, these artifacts can be reduced by precorrecting the rawdata. Higher order beam hardening artifacts, as they result when a mixture of materials such as water and bone, or water and bone and iodine is present, require an iterative beam hardening correction where the image is segmented into different materials and those are forward projected to obtain new rawdata. Typically, the forward projection must correctly model the beam polychromaticity and account for all physical effects, including the energy dependence of the assumed materials in the patient, the detector response, and others. We propose a new algorithm that does not require any knowledge about spectra or attenuation coefficients and that does not need to be calibrated. The proposed method corrects beam hardening in single energy CT data. Methods: The only a priori knowledge entering EBHC is the segmentation of the object into different materials. Materials other than water are segmented from the original image, e.g., by using simple thresholding. Then, a (monochromatic) forward projection of these other materials is performed. The measured rawdata and the forward projected material-specific rawdata are monomially combined (e.g., multiplied or squared) and reconstructed to yield a set of correction volumes. These are then linearly combined and added to the original volume. The combination weights are determined to maximize the flatness of the new and corrected volume. EBHC is evaluated using data acquired with a modern cone-beam dual-source spiral CT scanner (Somatom Definition Flash, Siemens Healthcare, Forchheim, Germany), with a modern dual-source micro-CT scanner (TomoScope Synergy Twin, CT Imaging GmbH, Erlangen, Germany), and with a modern

  13. Interventions to Correct Misinformation About Tobacco Products.

    Science.gov (United States)

    Cappella, Joseph N; Maloney, Erin; Ophir, Yotam; Brennan, Emily

    2015-07-01

    In 2006, the U.S. District Court held that tobacco companies had "falsely and fraudulently" denied: tobacco causes lung cancer; environmental smoke endangers children's respiratory systems; nicotine is highly addictive; low tar cigarettes were less harmful when they were not; they marketed to children; they manipulated nicotine delivery to enhance addiction; and they concealed and destroyed evidence to prevent accurate public knowledge. The courts required the tobacco companies to repair this misinformation. Several studies evaluated types of corrective statements (CS). We argue that most CS proposed ("simple CS's") will fall prey to "belief echoes" leaving affective remnants of the misinformation untouched while correcting underlying knowledge. Alternative forms for CS ("enhanced CS's") are proposed that include narrative forms, causal linkage, and emotional links to the receiver.

  14. Laparoscopic correction of peritoneal catheter dysfunction.

    Science.gov (United States)

    Kazemzadeh, Gholamhossein; Modaghegh, Mohammad-Hadi Saeed; Tavassoli, Alireza

    2008-10-01

    To present our experiences with laparoscopic repair of peritoneal catheter dysfunction Total of 24 patients with peritoneal catheter malfunction were considered for two-port laparoscopic manipulation. Two patients with unsuccessful result in the first trial and 3 patients with successful peritoneal dialysis results were reoperated because of catheter dysfunction. The success rates at the first and second manipulation was 79% and 80%. The most frequent cause of catheters dysfunction was migration of catheters out of the true pelvis. During the follow up, 8 patients were referred for renal transplantation, 8 underwent hemodialysis and 5 continued with normal catheter function. The mean longevity of the catheters after laparoscopic correction was 42 months. One year longevity rate as measured as 79%. Laparoscopy is the procedure of choice even in recurrent cases, for correction of malfunctioning continuous ambulatory peritoneal catheters, because this procedure is the only technique that can detects pathologic causes of catheters malfunction and can resolve those problems at the same time.

  15. Tracking correction for portable coal inventory instrument

    Science.gov (United States)

    Yang, Deshan; Dong, Lili; Liang, Qianqian; Zhang, Wang; Xu, Wenhai

    2017-03-01

    In the process of measuring the tracking of portable coal inventory instrument, the location accuracy is reduced and the tracking is broken due to float solution of RTK. A tracking correction method based on RTK localization data is proposed. First, the location data of the float solution is filtered by the median filtering algorithm, which reduces the location err and dispersion of the float solution. Then the forward and inverse position estimation is performed by using the fixed solution data before and after the track breakage. The filtering of the float solution positioning data for translation and rotation, make the first point and the end point coincidence with the point estimated. Complete measurement track stitching. In the actual coal inventory experiment, the measurement error is improved from 12.6% to 0.79% after tracking corrected. By using this method we can effectively solve the tracking deviation of actual measurement of coal, improve the portable coal inventory instrument measuring accuracy and adaptability.

  16. Empirical beam hardening correction (EBHC) for CT.

    Science.gov (United States)

    Kyriakou, Yiannis; Meyer, Esther; Prell, Daniel; Kachelriess, Marc

    2010-10-01

    Due to x-ray beam polychromaticity and scattered radiation, attenuation measurements tend to be underestimated. Cupping and beam hardening artifacts become apparent in the reconstructed CT images. If only one material such as water, for example, is present, these artifacts can be reduced by precorrecting the rawdata. Higher order beam hardening artifacts, as they result when a mixture of materials such as water and bone, or water and bone and iodine is present, require an iterative beam hardening correction where the image is segmented into different materials and those are forward projected to obtain new rawdata. Typically, the forward projection must correctly model the beam polychromaticity and account for all physical effects, including the energy dependence of the assumed materials in the patient, the detector response, and others. We propose a new algorithm that does not require any knowledge about spectra or attenuation coefficients and that does not need to be calibrated. The proposed method corrects beam hardening in single energy CT data. The only a priori knowledge entering EBHC is the segmentation of the object into different materials. Materials other than water are segmented from the original image, e.g., by using simple thresholding. Then, a (monochromatic) forward projection of these other materials is performed. The measured rawdata and the forward projected material-specific rawdata are monomially combined (e.g., multiplied or squared) and reconstructed to yield a set of correction volumes. These are then linearly combined and added to the original volume. The combination weights are determined to maximize the flatness of the new and corrected volume. EBHC is evaluated using data acquired with a modern cone-beam dual-source spiral CT scanner (Somatom Definition Flash, Siemens Healthcare, Forchheim, Germany), with a modern dual-source micro-CT scanner (Tomo-Scope Synergy Twin, CT Imaging GmbH, Erlangen, Germany), and with a modern C-arm CT scanner

  17. Dynamical Casimir effect and loop corrections

    Science.gov (United States)

    Akhmedov, E. T.; Alexeev, S. O.

    2017-09-01

    We calculate quantum loop corrections to the stress-energy flux caused by moving mirrors. We consider massless, self-interacting, ϕ4, real scalar theory. In these calculations we encounter new and quite unexpected subtleties due to the absence of global hyperbolicity in the presence of mirrors. We attempt to clearly phrase as many hidden assumptions and complications as possible that appear while solving the problem in question. On top of that, we find that quantum loop corrections to the stress-energy flux grow with time and are not suppressed in comparison with the semiclassical contributions. Thus, we observe the breakdown of the perturbation theory, and we discuss its physical origin and ways to deal with such a situation. As a byproduct, we observe a similarity of the problem in question with that for the minimally coupled, massless scalar field in de Sitter space.

  18. On the feasibility of photon-limited tip-tilt correction in very small telescopes

    Science.gov (United States)

    Popowicz, A.; Orlov, V. G.

    2017-10-01

    The resolution of astronomical images taken from the ground is severely degraded by the atmosphere. One of the simplest methods for overcoming this problem is tip-tilt (TT) correction. This method is especially valuable for small telescopes, as it enables them to reach their diffraction limit. Unfortunately, the method requires a bright guide star to asses the blurring of astronomical images. In this study we show how various factors influence the feasibility of tip-tilt correction in very small telescopes (≤ 1 m). We evaluate the effect of: (1) the intensity of the guide star, (2) seeing conditions, (3) telescope size and (4) sky background. The results are obtained from data simulated using the Random Wave Vector method. The dependencies presented in this paper can be used to predict the sky coverage of small telescopes with TT correction for a wide range of observational conditions.

  19. Static Scene Statistical Non-Uniformity Correction

    Science.gov (United States)

    2015-03-01

    Error NUC Non-Uniformity Correction RMSE Root Mean Squared Error RSD Relative Standard Deviation S3NUC Static Scene Statistical Non-Uniformity...Deviation ( RSD ) which normalizes the standard deviation, σ, to the mean estimated value, µ using the equation RS D = σ µ × 100. The RSD plot of the gain...estimates is shown in Figure 4.1(b). The RSD plot shows that after a sample size of approximately 10, the different photocount values and the inclusion

  20. CORRECTION OF INTESTINAL COLIC IN INFANTS

    Directory of Open Access Journals (Sweden)

    G.V. Yatsyk

    2007-01-01

    Full Text Available The article describes the contemporary vision of the causes, pathogenesis, diagnostic criteria and clinical manifestation of intestinal colic in infants. The article also provides a detailed description of to correction of the gastrointestinal tract in the infants. Also the article opens a discussion about the benefits of using vegetable medications with a soft spasmolytic effect for this purpose.Key words: infants, intestinal colic, gastrointestinal tract dysfunction.