Analysis of the Hirsch index's operational properties

The h-index is a relatively recent bibliometric indicator for assessing the research output of scientists, based on the publications and the corresponding citations. Due to the original characteristics of easy calculation and immediate intuitive meaning, this indicator has become very popular in the scientific community. Also, it received some criticism essentially because of its ‘‘low" accuracy. The contribution of this paper is to provide a detailed analysis of the h-index, from the point of view of the indicator operational properties. This work can be helpful to better understand the peculiarities and limits of h and avoid its misuse. Finally, we suggest an additional indicator ðf Þ that complements h with the information related to the publication age, not compromising the original simplicity and immediacy of understandin

The Z-index: A geometric representation of productivity and impact which accounts for information in the entire rank-citation profile

We present a simple generalization of Hirsch's h-index, Z = \sqrt{h^{2}+C}/\sqrt{5}, where C is the total number of citations. Z is aimed at correcting the potentially excessive penalty made by h on a scientist's highly cited papers, because for the majority of scientists analyzed, we find the excess citation fraction (C-h^{2})/C to be distributed closely around the value 0.75, meaning that 75 percent of the author's impact is neglected. Additionally, Z is less sensitive to local changes in a scientist's citation profile, namely perturbations which increase h while only marginally affecting C. Using real career data for 476 physicists careers and 488 biologist careers, we analyze both the distribution of $Z$ and the rank stability of Z with respect to the Hirsch index h and the Egghe index g. We analyze careers distributed across a wide range of total impact, including top-cited physicists and biologists for benchmark comparison. In practice, the Z-index requires the same information needed to calculate h and could be effortlessly incorporated within career profile databases, such as Google Scholar and ResearcherID. Because Z incorporates information from the entire publication profile while being more robust than h and g to local perturbations, we argue that Z is better suited for ranking comparisons in academic decision-making scenarios comprising a large number of scientists.Comment: 9 pages, 5 figure

The Perceived Mapping Between Form and Meaning in American Sign Language Depends on Linguistic Knowledge and Task: Evidence from Iconicity and Transparency Judgments

Iconicity is often defined as the resemblance between a form and a given meaning, while transparency is defined as the ability to infer a given meaning based on the form. This study examined the influence of knowledge of American Sign Language (ASL) on the perceived iconicity of signs and the relationship between iconicity, transparency (correctly guessed signs), ‘perceived transparency’ (transparency ratings of the guesses), and ‘semantic potential’ (the diversity (H index) of guesses). Experiment 1 compared iconicity ratings by deaf ASL signers and hearing non-signers for 991 signs from the ASL-LEX database. Signers and non-signers’ ratings were highly correlated; however, the groups provided different iconicity ratings for subclasses of signs: nouns vs. verbs, handling vs. entity, and one- vs. two-handed signs. In Experiment 2, non-signers guessed the meaning of 430 signs and rated them for how transparent their guessed meaning would be for others. Only 10% of guesses were correct. Iconicity ratings correlated with transparency (correct guesses), perceived transparency ratings, and semantic potential (H index). Further, some iconic signs were perceived as non-transparent and vice versa. The study demonstrates that linguistic knowledge mediates perceived iconicity distinctly from gesture and highlights critical distinctions between iconicity, transparency (perceived and objective), and semantic potential

HUBUNGAN STATUS GIZI (INDEKS BB/TB DAN TB/U) DENGAN USIA MENARCHE PADA SISWI SMP NEGERI DI KECAMATAN PATI KABUPATEN PATI

Remaja puteri mulai dewasa ditandai dengan adanya menarche. Remaja putri dengan status gizi dan kesehatan yang baik perkembangan seksualnya termasuk menarche akan mengalami percepatan. Status gizi yang ada di tiap daerah berbeda beda begitu juga dengan usia menarche. Penelitian ini bertujuan untuk menganalisis hubungan status gizi berdasarkan indeks BB/TB dan TB/U dengan usia menarche pada siswi SMPN di Kecamatan Pati Kabupaten Pati. Jenis penelitian ini adalah explanatory dengan metode survey dan pendekatan cross sectional. Populasi sampel sebanyak 91 siswi. Pengambilan sampel dilakukan dengan puruposive random sampling. Pemilihan lokasi dilakukan secara random dan pemilihan sampel dilakukan berdasarkan kriteria inklusi dan eksklusi. Data diperoleh dengan menggunakan kuesioner dan pengukuran. Analisis yang digunakan adalah uji korelasi Rank Spearman dengan tingkat kepercayaan 90%. Hasil penilitian ini menunjukkan bahwa usia rata-rata responden adalah 12,2 tahun (sd + 0,613), status gizi normal (indeks TB/U) 63,7% dan stunting sebesar 36,3%. Status gizi normal (indeks BB/TB) sebesar 96,7% dan gemuk 3,3%. Tidak terdapat responden yang mempunyai status gizi wasting dan sangat kurus. Hasil uji statistik menunjukkan bahwa ada hubungan yang negatif antara status gizi berdasarkan indeks TB/U dengan usia menarche (p : 0,002; r : -0,319) yang berarti semakin tinggi status gizi semakin cepat usia menarchenya dan tidak ada hubungan antara status gizi (indeks BB/TB) dengan usia menarche (p : 0,263; r : -0,119). Disarankan agar diperhatikan konsumsi gizi sejak usia dini sehingga tidak akan mengalami keterlambatan menarche. Kata Kunci: Status gizi, Usia Menarche, Remaja CORRELATION BETWEEN THE NUTRITIONAL STATUS (INDEX W/H AND H/A) AND THE AGE OF MENARCHE ON JUNIOR SCHOOLGIRLS IN PATI SUB DISTRICT, DISTRICT PATI ( Adulthood early sign of girls adolescents is menarche. Girls adolescent with good of the nutritional status and health growth of sexual of the including natural menarche acceleration. Nutritional status which in every area is different alsi with age of menarche. The aim of this research is to analyse correlation between the nutritional status pursuant to index W/H and H/A with the age of menarche on Junior Highschoolgirls in Pati with amount of simple counted 91 schoolgirls. Intake of the sample done with purposive random sampling. Location choice conducted by random and election of sample pursuant to criterion of inclusi and eksklusi. Data obtained by using measurement and questionaire. The analize to be used by correlation test of Rank Spearman with trust storey level 90%. Result of research indicate that age of menarche flatten responder are 12,2 years (sd ;0,6), the normal of nutritional status (index H/A) equal to 63,7% and Stuntung equal to 36,3%. The normal of nutritional status (index W/H) equal to 96,7% and obese equal to 3,3%. Do not there are responder having nutritional status of wasting and very thin. Statisticak tes result so that there is relation which is negative between nutritional status pursuant to index H/A and age of menarche (p : 0,002;r : -0,319). Meaning status excelsior of nutrition faster age of menarche and there no relation between nutritional status pursuant to index of W/H with age of menarche (p: 0,263 ; r : -0,119). Suggested that to be paid attention by consumption of nutrition since age early so that will not experience of delay of menarche. Keyword: Nutritional status, age of menarche,adolescent,

The Carbon_h-Factor: Predicting Individuals' Research Impact at Early Stages of Their Career

Assessing an individual's research impact on the basis of a transparent algorithm is an important task for evaluation and comparison purposes. Besides simple but also inaccurate indices such as counting the mere number of publications or the accumulation of overall citations, and highly complex but also overwhelming full-range publication lists in their raw format, Hirsch (2005) introduced a single figure cleverly combining different approaches. The so-called h-index has undoubtedly become the standard in scientometrics of individuals' research impact (note: in the present paper I will always use the term “research impact” to describe the research performance as the logic of the paper is based on the h-index, which quantifies the specific “impact” of, e.g., researchers, but also because the genuine meaning of impact refers to quality as well). As the h-index reflects the number h of papers a researcher has published with at least h citations, the index is inherently positively biased towards senior level researchers. This might sometimes be problematic when predictive tools are needed for assessing young scientists' potential, especially when recruiting early career positions or equipping young scientists' labs. To be compatible with the standard h-index, the proposed index integrates the scientist's research age (Carbon_h-factor) into the h-index, thus reporting the average gain of h-index per year. Comprehensive calculations of the Carbon_h-factor were made for a broad variety of four research-disciplines (economics, neuroscience, physics and psychology) and for researchers performing on three high levels of research impact (substantial, outstanding and epochal) with ten researchers per category. For all research areas and output levels we obtained linear developments of the h-index demonstrating the validity of predicting one's later impact in terms of research impact already at an early stage of their career with the Carbon_h-factor being approx. 0.4, 0.8, and 1.5 for substantial, outstanding and epochal researchers, respectively

Tracking the Earliest Stages of Aqueous Alteration in the Mildly Altered CM Chondrite EET 96029

The earliest stages of CM carbonaceous chondrite aqueous alteration are very poorly understood as mildly altered CMs are extremely rare. The Paris meteorite (CM2.7) [1-3] and QUE 97990 (CM2.6) [4,5] are among the least aqueously altered CMs described to date. However, neither of them contain the pristine attribute of chondrule mesostasis glass. Glass is highly reactive and so among the very first phases to undergo aqueous alteration [6]. Therefore, the CM carbonaceous chondrite EET 96029 is very unusual as it has been shown to have retained mesostasis glass in at least one chondrule [7]. According to the new CM classification scheme of [8], which is based on H content, EET 96029 has an index of 2.0 (data in [9]), meaning that it is less altered than all but one of the fifty CMs analysed by [8]. A caveat is that a low H content could be due to mild heating as well as a low degree of aqueous processing [9]. However, the bulk O oxygen isotope composition of EET 96029 (as determined by [10]) is consistent with a low degree of alteration as it is slightly closer to that of the CO3 falls (possible representatives of the anhydrous progenitors of the CMs) than even the least altered lithology of Paris (Fig. 1).<p></p> To better understand the earliest stages of CM aqueous alteration and its impact on mesostasis glass, we have undertaken a detailed study of chondrule mesostasis textures and compositions in the mildly aqueously altered CM chondrite EET 96029.<p></p&gt

Research on Assessment Method of Fire Protection System

AbstractSafety assessment of fire protection (SAFP) is a very important approach in fire safety management. Effectiveness and reliability are crucial to the SAFP, which has endowed the study of the assessment methods significant meaning. A new quantitative method named theoretical safety control method, based on modern control theory, was studied in the paper. Dynamic models, assessment indexes and analysis approaches of every index of the SAFP were put forward and three dynamic indexes, that are System Hazard Index-H, Control Capacity Index-C and Safety Degree-S which changed with the system states and presented the conflicting consequence between hazards and controlling of fire protection system, were used to evaluate the results of the method. This method can realize dynamic and quantitative management and the fire protection system controlling. A case study was defined and assessed by using the method in this paper, and the results of evaluation were viable compared with the actual situation

KEANEKARAGAMAN JENIS TUMBUHAN PENYUSUN VEGETASI DI KAWASAN HUTAN LINDUNG DESA UWEMANJE KAB.SIGI

Forests are one of the natural resources that have important meaning for human life. Forests with various functions and benefits have a very large influence both directly and indirectly on ecological, economic and social aspects. The purpose of this study was to determine the value of the diversity of plant species that make up the vegetation. This study uses the observation plot/plot method to see the diversity of the types of vegetation constituents in the Protected Forest Area of Uwemanje Village, Kinovaro District. The Important Value Index is used to determine the dominance of one species over another in a stand. Significant values were obtained from the sum of the Relative Density (KR), Relative Frequency (FR) and Relative Dominance (DR) for the level of stakes, piles and trees. The species diversity index was used to determine the species diversity of forest stands. Based on the results of research that has been carried out the types of plants that make up the vegetation in the protected forest area at the tree level found 16 species of trees from 14 families, at the pole level found 16 species from 16 families, at the sapling level found 10 species from 9 families, and at the seedling level found 10 types from 9 families. The level of Species Diversity (H¹) for each level is at the tree level H¹ = 3.81. Pile level H¹ = 3.35. The sapling level H¹ = 3.45 and at the seedling level H¹ = 3.54 belong to the high criteria.Kata Kunci: hutan, vegetasi, keanekaragaman jeni