Parallel detrended fluctuation analysis for fast event detection on massive PMU data

("(c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.")Phasor measurement units (PMUs) are being rapidly deployed in power grids due to their high sampling rates and synchronized measurements. The devices high data reporting rates present major computational challenges in the requirement to process potentially massive volumes of data, in addition to new issues surrounding data storage. Fast algorithms capable of processing massive volumes of data are now required in the field of power systems. This paper presents a novel parallel detrended fluctuation analysis (PDFA) approach for fast event detection on massive volumes of PMU data, taking advantage of a cluster computing platform. The PDFA algorithm is evaluated using data from installed PMUs on the transmission system of Great Britain from the aspects of speedup, scalability, and accuracy. The speedup of the PDFA in computation is initially analyzed through Amdahl's Law. A revision to the law is then proposed, suggesting enhancements to its capability to analyze the performance gain in computation when parallelizing data intensive applications in a cluster computing environment

Parallel detrended fluctuation analysis for fast event detection on massive PMU data

("(c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.")Phasor measurement units (PMUs) are being rapidly deployed in power grids due to their high sampling rates and synchronized measurements. The devices high data reporting rates present major computational challenges in the requirement to process potentially massive volumes of data, in addition to new issues surrounding data storage. Fast algorithms capable of processing massive volumes of data are now required in the field of power systems. This paper presents a novel parallel detrended fluctuation analysis (PDFA) approach for fast event detection on massive volumes of PMU data, taking advantage of a cluster computing platform. The PDFA algorithm is evaluated using data from installed PMUs on the transmission system of Great Britain from the aspects of speedup, scalability, and accuracy. The speedup of the PDFA in computation is initially analyzed through Amdahl's Law. A revision to the law is then proposed, suggesting enhancements to its capability to analyze the performance gain in computation when parallelizing data intensive applications in a cluster computing environment

Phytochemical profiling and evaluation of modified resazurin microtiter plate assay of the roots of Trillium govanianum

Trillium govanianum Wall. ex D. Don (Melanthiaceae alt. Trilliaceae), is native to the Himalayas. The present study, for the first time, was undertaken to explore the antimicrobial potential, to determine the minimum inhibitory concentration (MIC) values of the methanol extract of the roots of Trillium govanianum and its solid phase extraction (SPE) fractions by using resazurin microtiter assay (REMA) against Gram positive and Gram negative bacterial registered strains and to carry out phytochemical analysis. The remarkable amount of gallic acid equivalent phenolic and quercetin equivalent flavonoid content was manifested by MeOH extract (20.27±3.03 mg GAE/ g DW and 9.25± 0.50 mg QE/ g DW respectively). The GC/MS analysis revealed the presence saturated and unsaturated components. Considerable level of antibacterial potential against Gram-positive bacteria (MIC: 2.5-0.009 mg/mL) than against Gram-negative bacteria (MIC: 2.5-0.165 mg/mL). The use of microtiter plates has the advantage of lower cost, fast and quantitative results

How was the dageš in Biblical Hebrew בָּתִּים pronounced and why is it there?

The dageš in the Biblical Hebrew plural form בָּתִּים ‘houses’ is generally presented as an enigma in descriptions of the language. A wide variety of opinions about it have been expressed in Biblical Hebrew textbooks, reference grammars and the scholarly literature, but many of these are speculative without any direct or comparative evidence. One of the aims of this article is to examine the evidence for the way the dageš was pronounced in this word in sources that give us direct access to the Tiberian Masoretic reading tradition. A second aim is to propose a reason why the word has a dageš on the basis of comparative evidence within Biblical Hebrew reading traditions and other Semitic languages

Orthoepy in the Tiberian reading tradition of the Hebrew Bible and its historical roots in the Second Temple Period

The Tiberian reading tradition of the Hebrew Bible contains a variety of features that point to its origin in the Second Temple period. Once such feature is the careful reading of the inflected forms of the verbs הָיָה and חָיָה to ensure that they are not confused. The paper directs particular attention to the lengthening of the vowels of the prefix conjugation (imperfect) of these verbs, which can be reconstructed from medieval sources. It is argued through comparison with the Babylonian tradition of Biblical Hebrew that this lengthening is an orthoepic feature that has its roots in the Second Temple Period. This demonstrates that the priestly authorities who were concerned with the careful preservation of the written text were also concerned with the careful preservation of the orally transmitted reading tradition

The Background of the So-called ‘Extended Tiberian’ Vocalization of Hebrew

The vocalization of modern printed Bibles is a tradition that has its origins in the standard Tiberian system of vocalization. This was developed by the Masoretes of Tiberias, whose school was active in the early Islamic period down to the 10th century ad. This system of vocalization is found in extant early manuscript codices of the Bible that were produced by the Tiberian Masoretic school, the best known being the Aleppo Codex, and it reflects the Tiberian biblical reading tradition. The standard Tiberian vocalization continued to be transmitted in manuscripts produced in later centuries after the cessation of the Tiberian Masoretic school. These include the so-called Codex Leningradensis (St. Petersburg National Library of Russia I Firkovitch B19a), which was copied in the 11th century, and forms the basis of modern academic editions such as BHS and BHQ. There is remarkable uniformity in standard Tiberian vocalization across the medieval manuscripts, with only a few minor variations, some of which can be correlated with known differences between individual Masoretes during the Masoretic period

The Opening Formula and Witness Clauses in Arabic Legal Documents from the Early Islamic Period

Arabic legal documents from early Islamic Egypt are attested in Arabic papyrus collections. These exhibit a formulaic structure that is clearly distinct from those of the Byzantine Greek tradition of legal documents, which continued to be written in the first Islamic century. The Islamic Arabic documents reflect a legal formulaic tradition that had its origins in the Ḥijāz of Arabia. This article examines the background of this Ḥijāzī tradition, with particular focus on the opening formula and the witness clauses. Parallel features are identified in Ancient South Arabian legal texts and in texts of legal nature from Northern Arabia

Evaluation of Resazurin Microtiter Plate Assay and HPLCPhotodiode Array Analysis of the Roots of Asparagus adscendens

Asparagus adscendens Roxb. (Asparagaceae), is native to the Himalayas. The present study, for the first time, was undertaken to explore the antimicrobial potential, to determine the minimum inhibitory concentration (MIC) values of the methanol extract of the roots of Asparagus adscendens and its solid phase extraction (SPE) fractions by using resazurin microtiter assay (REMA) against gram positive and negative bacterial registered strains and to carry out HPLC-Photodiode array analysis of the SPE fractions. The methanol extract and all SPE exhibited considerable level of antibacterial potential against gram-positive bacteria (MIC: 2.5-0.009 mg/mL) than against gram-negative bacteria (MIC: 1.25-2.5 mg/mL). The use of microtiter plates has the advantage of lower cost, fast and quantitative results. Like other Asparagus species, the presence of phenolic compounds in all SPE fractions was evident in the HPLC-PDA data

Determinants of Increasing Trend of Self-Medication in a Pakistani Community

Purpose: To determine the major reasons, sources, diseases and drugs responsible for increasing trend of self-medication.Method: A community-based cross-sectional survey was carried out in the district of Faisalabad in Pakistan. Respondents (1488) were classified on the basis of age, sex, education, lifestyle and their economical level. A questionnaire was distributed among the sample population to collect data.Results: Majority of respondents involved in self-medication were aged between 15 and 20 years. Family members (N = 717, 48 %) were considered the major source of information for self-medicated drugs. Lack of time (N = 504, 37 %) while economic issues (N = 485, 33 %) were the major reasons for self-medication. Medical stores were the source of drug purchase by 1087 (73 %) respondents. Headache (N = 772, 52 %) and fever (N = 600, 40 %) were the main indications for self-medication while 694 respondents reported that they engage in single-dose self-medication. Paracetamol (N = 689, 46 %), other analgesics (N = 488, 33 %),  non-steroidal anti-inflammatory (N = 680, 46 %) were reported to be used frequently for self-medication.Conclusion: Self-medication is prevalent in the Pakistani community due to easy access to over the counter (OTC) and prescription-only medicines  (POM). This may lead to untoward effects in consumers of the products. Special interventions by relevant regulatory agencies regarding the sale of the drugs are therefore required.Keywords: Self-medication, OTC drugs, Pharmacist

Prospects for the development of odour baits to control the tsetse flies Glossina tachinoides and G. palpalis s.l.

Field studies were done of the responses of Glossina palpalis palpalis in Côte d'Ivoire, and G. p. gambiensis and G. tachinoides in Burkina Faso, to odours from humans, cattle and pigs. Responses were measured either by baiting (1.) biconical traps or (2.) electrocuting black targets with natural host odours. The catch of G. tachinoides from traps was significantly enhanced (~5×) by odour from cattle but not humans. In contrast, catches from electric targets showed inconsistent results. For G. p. gambiensis both human and cattle odour increased (>2×) the trap catch significantly but not the catch from electric targets. For G. p. palpalis, odours from pigs and humans increased (~5×) the numbers of tsetse attracted to the vicinity of the odour source but had little effect on landing or trap-entry. For G. tachinoides a blend of POCA (P = 3-n-propylphenol; O = 1-octen-3-ol; C = 4-methylphenol; A = acetone) alone or synthetic cattle odour (acetone, 1-octen-3-ol, 4-methylphenol and 3-n-propylphenol with carbon dioxide) consistently caught more tsetse than natural cattle odour. For G. p. gambiensis, POCA consistently increased catches from both traps and targets. For G. p. palpalis, doses of carbon dioxide similar to those produced by a host resulted in similar increases in attraction. Baiting traps with super-normal (~500 mg/h) doses of acetone also consistently produced significant but slight (~1.6×) increases in catches of male flies. The results suggest that odour-baited traps and insecticide-treated targets could assist the AU-Pan African Tsetse and Trypanosomiasis Eradication Campaign (PATTEC) in its current efforts to monitor and control Palpalis group tsetse in West Africa. For all three species, only ~50% of the flies attracted to the vicinity of the trap were actually caught by it, suggesting that better traps might be developed by an analysis of the visual responses and identification of any semiochemicals involved in short-range interaction