Mutations of rpoB associated with rifampin resistance were studied in 37 multidrug-resistant (MDR) clinical strains of Mycobacterium tuberculosis isolated in Italy. At least one mutated codon was found in each MDR strain. It was always a single-base substitution leading to an amino acid change. Nine different rpoB alleles, three of which had not been reported before, were found. The relative fr...

Word embeddings are commonly compared either with human-annotated word similarities or through improvements in natural language processing tasks. We propose a novel principle which compares the information from word embeddings with reality. We implement this principle by comparing the information in the word embeddings with geographical positions of cities. Our evaluation linearly transforms th...

a place-name or a toponym is a word used to indicate, denote or identify a geographic locality. place-names are formed in the course of history of a region and are affected by various linguistic, social, political and cultural events. toponymy is the taxonomic study of place-names, based on etymological, historical and geographical information. this paper first defines toponym and topnymy and i...

Wireless Ad-Hoc networks are collection of nodes that can communicate without any fixed infrastructure. A crucial problem in Ad-Hoc networks is finding an efficient route between a source and a destination. The need for scalable and energy efficient protocols, along with the recent availability of small, inexpensive and low power positioning instruments justify introducing position based routin...

Location services are used in mobile ad hoc and hybrid networks either to locate the geographic position of a given node in the network or for locating a data item (content). One of the main usages of position location services is in location based routing algorithms. In particular, geographic routing protocols can route messages more efficiently to their destinations based on the destination n...

This paper focuses on private sources of knowledge specifically customers and competitors as sources of innovative activity. Our main argument is that the two sources are correlated even after controlling for several factors at the level of technology, individual and organization. What is more, we show that the geographical distance of these sources modifies the intensity of this correlation, i...

This empirical study focuses on the impact of an information technology (IT), specifically electronic mail (e-mail), on three basic organization components: structure, people, and tasks. An Organizational Interaction Diamond (OID) model is developed illustrating how each component enables changes in other components interacting with the organization’s internal and external environments. The org...

Globally distributed software development is facing challenges brought by geographic distance, temporal separation, and cultural diversity. Yet research regarding the impact of temporal separation and cultural differences is limited. This paper draws on an interpretive case study to examine the influence of culture on temporal separation and coordination of globally distributed software develop...

This paper presents a method to model network delay for overlay network application. The network topology measurement technology and network AS information is used to build up model of network delay via AS and geographic distance. Based on global Internet measurement result, we calculated the parameters of the model. Furthermore, the model verification is done by comparing on AS-MMI protocol an...