Data-driven abductive inference of library specifications

Programmers often leverage data structure libraries that provide useful and reusable abstractions. Modular verification of programs that make use of these libraries naturally rely on specifications that capture important properties about how the library expects these data structures to be accessed and manipulated. However, these specifications are often missing or incomplete, making it hard for clients to be confident they are using the library safely. When library source code is also unavailable, as is often the case, the challenge to infer meaningful specifications is further exacerbated. In this paper, we present a novel data-driven abductive inference mechanism that infers specifications for library methods sufficient to enable verification of the library's clients. Our technique combines a data-driven learning-based framework to postulate candidate specifications, along with SMT-provided counterexamples to refine these candidates, taking special care to prevent generating specifications that overfit to sampled tests. The resulting specifications form a minimal set of requirements on the behavior of library implementations that ensures safety of a particular client program. Our solution thus provides a new multi-abduction procedure for precise specification inference of data structure libraries guided by client-side verification tasks. Experimental results on a wide range of realistic OCaml data structure programs demonstrate the effectiveness of the approach.

Strict Linearizability and Abstract Atomicity

Linearizability is a commonly accepted consistency condition for concurrent objects. Filipović et al. show that linearizability is equivalent to observational refinement. However, linearizability does not permit concurrent objects to share memory spaces with their client programs. We show that linearizability (or observational refinement) can be broken even though a client program of an object accesses the shared memory spaces without interleaving with the methods of the object. In this paper, we present strict linearizability which lifts this limitation and can ensure client-side traces and final-states equivalence even in a relaxed program model allowing clients to directly access the internal states of concurrent objects. We also investigate several important properties of strict linearizability. At a high level of abstraction, a concurrent object can be viewed as a concurrent implementation of an abstract data type (ADT). We also present a correctness criterion for relating an ADT and its concurrent implementation, which is the combination of linearizability and data abstraction and can ensure observational equivalence. We also investigate its relationship with strict linearizability.

Deradicalization of Terrorism Prisoner: Evaluation of The Terrorism Client Guidance Program at the Surakarta Correctional Facility

The radicalism that leads to terrorism is a threat to almost every country in the world, leading many countries to employ a deradicalization program to deradicalize people that have been influenced by terrorist ideology. This research purpose is to evaluate the effectiveness of deradicalization effort conducted through “terrorism client guidance program at Surakarta Correctional Facility”. Using the CIPP model of evaluation, data is collected from eighteen terrorism clients and a few structural officials as well as all related documents at Surakarta Correctional Facility. The result of this study found that: (1) Evaluation of context component is worth average, (2) Evaluation of input component is worth poor, (3) Evaluation of process component is worth good, and (4) Evaluation of product component is worth average. Overall, the effectiveness of deradicalization conducted through guidance for terrorism client program at Surakarta Correctional Facility is worth average. Although the total evaluation merit of the terrorist client’s guidance program is still in the level of average, however, the author suggests that the program should be continued by revising some areas of concern. Keywords: Deradicalization, Evaluation Program, Guidance of Terrorism Client.

PENDAMPINGAN IBU HAMIL MELALUI PROGRAM ONE STUDENT ONE CLIENT (OSOC) DI WILAYAH KERJA PUSKESMAS SIDOHARJO KABUPATEN SRAGEN

Maternal Mortality Ratein the Central Java in 2012-2014 has significantly increased in 2012: 675 of cases, 2013: 668 of cases, 2014: 711 of cases, while in 2015 and 2016 decreased: 2015: 619 of cases and 2016: 602 of cases. One Student One Client Program (OSOC) is a program launched by the Governmentof Central Java Provinceas an effort to decrease The Rate of Maternal Mortality in Central Java.The targets and outcomes of this activity are scientific publications and journals continuously also midwifery care process to the mother; pregnant, childbirth, childbirth, birth control and newborn care.The cooperation between healths professional in midwifery process later can contribute in decreasing Maternal Mortality Rate.The method used is direct learning experience in the community. Each learner will get one client (pregnant mother) through a midwife coordinator in Work Area of Puskesmas Sidoharjo to achieve one student one client.The techniques of data collection are forms of; pregnancy midwifery care , delivery, puerper, new baby born and KB. This accompaniment was carried out for 5 months from April - August 2017 in the working area of Puskesmas of Sidoharjo.The result of this are the majority of pregnant mothers can be through pregnancy with healthy and the increase of awareness and knowledge of pregnant women.

Recruiting a Project Manager

Project management is a practice based profession. Just knowing the project management principles does not make a person a successful project manager. It is more important to assess how the candidate applies the project management principle in practice than merely knowing the theoretical aspects of project management. Project Managers play a critical role in the organization. They are responsible for maintaining the revenue stream by ensuring steady flow of project deliverables, be it an internal initiative or a client program. As a Hiring Manager one has to use the right tools and methods to select the right candidate for the position of Project Manager. In this article some of the basic qualities of a Project Manager and the interview techniques adopted to select a Project Manager are discussed. The paper ends with discussion on new competency areas of Project Managers and new roles played by Project Managers in those areas.

Implementasi Algoritma Kriptografi RSA untuk Enkripsi dan Dekripsi Email

In the world of Internet nothing is really safe. There's always a gap in any application made. Likewise in email delivery. To minimize attacks on the data transmission is usually applied cryptography. One fairly popular cryptographic algorithms are RSA algorithm. In this study will discuss the implementation of a cryptographic algorithm RSA encryption and decryption process email. To test created a java-based email client program with message encryption and decryption features messages. This application uses the Java programming language and Netbeans 7.4 as editor. Mail servers used is Google Mail. The initial step of this study was to download email from the Google server and encrypt the message. The second step is decrypt the message to verify whether the message is still the same as the original message before it is encrypted . Results from this study is the application that can encrypt and decrypt messages using RSA cryptographic algorithm. With this application is expected to mail delivery is much safer. Because encrypted email will generate a random decimal number of unknown value .

The Analysis for the Causes of Surgical Cancellations in a Brazilian University Hospital

Background: The aim of our study is to quantify the occurrence of suspension of scheduled surgeries in a Brazilian university hospital, trying to identify the causes of suspension of these operations and meet the medical specialties that most contributed to the cancellation. Methods: This study takes the form of an exploratory, descriptive, and quantitative enquiry carried out by analyzing the database from 2008 to 2011 of the operating theater. Results: Of the 29,518 scheduled surgeries, 16.1% were cancelled. The patient was the main reason, accounting for more than 40% of all suspensions. When calculating the rate of surgery suspended from a specialty, dividing the number of cancelled surgeries in a specialty by the number of scheduled surgeries in the same, we found that otolaryngology is the specialty with the highest rate of 21.3%. Conclusions: One of the main reasons in our sample why surgeries were cancelled is nonappearance of the patient. Improving communication between patient and hospital facilitates the client program and also contributes to avoid cancellations.

Recruiting a Project Manager

Project management is a practice based profession. Just knowing the project management principles does not make a person a successful project manager. It is more important to assess how the candidate applies the project management principle in practice than merely knowing the theoretical aspects of project management. Project Managers play a critical role in the organization. They are responsible for maintaining the revenue stream by ensuring steady flow of project deliverables, be it an internal initiative or a client program. As a Hiring Manager one has to use the right tools and methods to select the right candidate for the position of Project Manager. In this article some of the basic qualities of a Project Manager and the interview techniques adopted to select a Project Manager are discussed. The paper ends with discussion on new competency areas of Project Managers and new roles played by Project Managers in those areas.

Fee for Service: The Experience of the University of Toronto Business Information Centre

From the 1994 CAIS Conference: The Information Industry in Transition McGill University, Montreal, Quebec. May 25 - 27, 1994.Since 1990, the Business Information Centre at the University of Toronto Faculty of Management has operated a corporate client program which provides outsourcing and fee-based services for businesses. Its client base includes large and medium-sized corporations and professional associations. The revenues generated through this program are directed toward paying a large portion of the Business Information Centre's operating costs. This paper describes how the program was initiated, how it has attracted clientele and met their demands for information, and how the program has benefited the faculty and students at the Faculty of Management. The paper also considers the growing trend toward fee for service in public, academic, and government libraries.

Design and Realization of Electric Vehicle Cross-Regional Operation Online Transaction Settlement System Base on Tuxedo Middleware

Through the analysis of electric vehicle cross-regional operation online transaction settlement system(OTSS) business requirement, determine the electric vehicle operations management system(EVOMS) based on using the Tuxedo middleware interface program developed to achieve. Design and development the Tuxedo server, client program, which can realize electric vehicle cross-regional operation online transaction settlement, solve the problem of cross -regional travel electric vehicle users.