A solvent-free Diels-Alder reaction of graphite into functionalized graphene nanosheets

A solvent-free Diels-Alder reaction was carried out by heating a mixture of graphite and a typical dienophile, maleic anhydride (MA) or maleimide (MI), in a sealed glass ampoule of argon. The functionalization of graphite with dienophiles was confirmed by various characterization techniques, suggesting the efficient functionalization and delamination of graphite into a few layers of graphitic nanosheets.close0

Rethinking repetition in dementia through a cartographic ethnography of subjectivity

This article critically engages with the predominant understandings of repetitive bodily practices within a dementia context. Rather than interpreting such practices as pathological and abnormal, I instead approach them through an ethnographic mapping, paying particular attention to the affective dynamics of repetition. Critically developing Fernand Deligny’s insights and methods of tracing and mapping bodily movements in dialogue with Tim Ingold’s notion of dwelling, I demonstrate affect-underpinned encounters and interactions of repetitive phenomena. I then argue for the extension of recent anthropological discussions about affect, repetition, and subjectivity by suggesting a more productive dialogue among theories of affect, body, atmosphere, cognition, memory, language, and life history

Ferromagnetic properties of (Ga,Mn)N nanowires grown by a chemical vapor deposition method

Ferromagnetic (Ga,Mn)N nanowires were grown on sapphire substrates at 900 degrees C by a chemical vapor deposition. Synchrotron radiation photoemission spectroscopy revealed that no secondary phases were found in the grown nanowire, meaning the dissolution of Mn atoms to form a solid solution in GaN nanowire. Fermi level was apart by 3.0,eV in the GaN nanowire (n-type), and it shifted toward the valance band maximum with ammonia flow rate. The Ga-to-N ratio decreased with the increase of ammonia flow rate, leading to the increase of Ga vacancies. From this, it is suggested that both increases in magnetic moment and Curie temperature with ammonia flow rate originated from the solid solution of Mn and Ga vacancies.open4

Recommending the Meanings of Newly Coined Words

AbstractIn this paper, we investigate how to recommend the meanings of newly coined words, such as newly coined named entities and Internet jargon. Our approach automatically chooses a document explaining a given newly coined word among candidate documents from multiple web references using Probabilistic Latent Semantic Analysis [1]. Briefly, it involves finding the topic of a document containing the newly coined word and computing the conditional probability of the topic given each candidate document. We validate our methodology with two real datasets from MySpace forums and Twitter by referencing three web services, Google, Urbandictionary, and Wikipedia, and we show that we properly recommend the meanings of a set of given newly coined words with 69.5% and 80.5% accuracies based on our three recommendations, respectively. Moreover, we compare our approach against three baselines where one references the result from each web service and our approach outperforms them

DS-ARP: A New Detection Scheme for ARP Spoofing Attacks Based on Routing Trace for Ubiquitous Environments

Despite the convenience, ubiquitous computing suffers from many threats and security risks. Security considerations in the ubiquitous network are required to create enriched and more secure ubiquitous environments. The address resolution protocol (ARP) is a protocol used to identify the IP address and the physical address of the associated network card. ARP is designed to work without problems in general environments. However, since it does not include security measures against malicious attacks, in its design, an attacker can impersonate another host using ARP spoofing or access important information. In this paper, we propose a new detection scheme for ARP spoofing attacks using a routing trace, which can be used to protect the internal network. Tracing routing can find the change of network movement path. The proposed scheme provides high constancy and compatibility because it does not alter the ARP protocol. In addition, it is simple and stable, as it does not use a complex algorithm or impose extra load on the computer system

Dichlorido[(S)-N-(1-phenyl­ethyl­idene)-1-(pyridin-2-yl)ethanamine-κ2 N,N′]zinc(II) dichloro­methane solvate

In the title compound, [ZnCl2(C15H16N2)]·CH2Cl2, the Zn(II) atom has a distorted tetra­hedral coordination by two Cl atoms and two N atoms from the organic ligand [the average Zn—N and Zn—Cl bond lengths are 2.060 (4) Å and Zn—Cl = 2.179 (16) Å, respectively]. The dihedral angle between the N—Zn—N and Cl—Zn—Cl planes is 89.9 (1)°. The phenyl ring forms a dihedral angle of 40.6 (5)° with the imine plane