bluuebunny/crossref_metadata_2025_split huggingface dataset:
Least Squares and Minimum MSE Estimators of Variance Components in Mixed Linear Models
Authors: Volaufová J. , Witkovský V. 
Published: May 2007

AbstractThe paper deals with the quadratic invariant estimators of the linear functions of variance components in mixed linear model. The estimator with locally minimal mean square error with respect to a parameter ϑ is derived. Under the condition of normality of the vector Y the theoretical values of MSE of several types of estimators are compared in two different mixed models; under a different types of distributions a simulation study is carried out for the behaviour of derived estimators.
A Parameter‐Elimination Method for Nonlinear Regression with Linear Parameters and Autocorrelated Errors
Authors: Huang M.‐N. L. , Huang M. K. 
Published: May 2007

AbstractIn this study, we are interested in the problem of estimating the parameters in a nonlinear regression model when the error terms are correlated. Throughout this work, we restrict ourselves to the special case when the error terms follow a pth order stationary autoregressive model (AR(p)). Following the idea of LAWTON and SYLVESTRE (1971) and GALLANT and GOEBEL (1976), a parameter‐elimination method is proposed, which has the advantages that it is not sensitive to the initial values and convergence of the procedure may be more stable because of the reduced dimension of the problem. The parameter‐elimination method is compared with the methods by GALLANT and GOEBEL (1976) and GLASBEY (1980) by Monte Carlo Simulation, and the results of applying the first two methods to the real data obtained from the Environmental Protection Administration of the Executive Yuan of the Republic of China are presented.
Missing Data and the Mixtures of Discrete and Continuous Random Variables
Authors: Wojciechowski T. 
Published: May 2007

AbstractIn many practical applications we deal with a problem of estimation of a density function of a vectorxsome components of which are discrete, while the remaining ones are continuous. Among many models that can be used in this case the most useful are the location model and the kernel model. The problem arises when the observed data contain missing values i.e. on some individuals some of the variables have not been observed with no particular pattern of missingness. An application of the EM algorithm will allow us to estimate the parameters of the location model from incomplete data. The method is described in Section 2. In Section 3 some suggestions how to deal with incompleteness when the kernel model is used are made. Finally, Section 4 contains an example.
Confidence Intervals for the Relative Risk Ratio Parameter from Survival Data Under a Random Censorship Model in Biomedical and Epidemiologic Studies (By Simulation)
Authors: Rao B. Raja , Talwalker Sheela , Kundu Debasis 
Published: May 2007

AbstractThe present paper reports the results of a Monte Carlo simulation study to examine the performance of several approximate confidence intervals for the Relative Risk Ratio (RRR) parameter in an epidemiologic study, involving two groups of individuals. The first group consists ofn1individuals, called the experimental group, who are exposed to some carcinogen, say radiation, whose effect on the incidence of some form of cancer, say skin cancer, is being investigated. The second group consists ofn2individuals (called the control group) who are not exposed to the carcinogen. Two cases are considered in which the life times (or time to cancer) in the two groups follow (i) the exponential and (ii) the Weibull distributions. The case when the life times follow a Rayleigh distribution follows as a particular case. A general random censorship model is considered in which the life times of the individuals are censored on the right by random censoring times following (i) the exponential and (ii) the Weibull distributions. The Relative Risk Ratio parameter in the study is defined as the ratio of the hazard rates in the two distributions of the times to cancer. Approximate confidence intervals are constructed for the RRR parameter using its maximum likelihood estimator (m.l.e) and several other methods, including a method due to FIELLER. SPROTT'S (1973) and Cox's (1953) suggestions, as well as the Box‐Cox (1964) transformation, are also utilized to construct approximate confidence intervals. The performance of these confidence intervals in small samples is investigated by means of some Monte Carlo simulations based on 500 random samples. Our simulation study indicates that many of these confidence intervals perform quite well in samples of size 10 and 15, in terms of the coverage probability and expected length of the interval.
A Random Field Approach to Transect Counts of Wildlife Populations
Authors: Högmander H. 
Published: May 2007

AbstractLine transect counting of a wildlife population is considered a sampling from a planar marked point process, where the marks describe the detectability of the animals. Sampling properties of transect counts and a new density estimator are derived from a counting process, which is a shot‐noise field induced by the marked point process. A general formula for the sampling variance of a transect is derived and applied to compare five common types of transects. Some stereological connections of transect sampling and density estimators are shown.
Fertility Adjustments in Rectangular Field Trials
Authors: Lefkovitch L. P. 
Published: May 2007

AbstractBased on Mandel's additive plus multipicative model for ANOVA, this paper presents a procedure to represent fertility differences in field trials arranged in rectangular plans. After fitting any block and treatment effects, the residuals are assigned to their positions in the rectangular planting plan, and then decomposed into orthogonal components, of which the largest ist attributed to fertility. If the variance associated with this component is significantly larger than those remaining, the observed data are then adjusted for it; the process is repeated until there is no significant component.The procedure is illustrated by data from a variety trial.
Effect of Selection on a Quantitative Characteristic
Authors: Suresh R. P. , Kale B. K. 
Published: May 2007

AbstractIn this paper we study the effect of selection procedures on certain parameters of the distribution function (d.f.) (such as mean, percentile etc.) of a quantitative characteristic X, in successive generations when the d.f. is governed by a single locus. We study the changes in gene frequencies under the truncation and genotype selection procedures by obtaining approximations to the gene frequencies, since exact expressions are not available. Using these approximations for the gene frequencies, we compute the selection differentials of X for different values of n, the number of generations. We also obtain the limiting distributions as n → ∞ and compute the number of generations required for the above parameter(s) of the d.f. to reach a value close enough to the limiting value.
A Two‐stage Design for Comparing Clinical Trials
Authors: Chen Pinyuen , Hsu Lifang 
Published: May 2007

AbstractA two‐stage design is proposed to choose among several experimental treatments and a standard treatment in clinical trials. The first stage employs a selection procedure to select the best treatment, provided it is better than the standard. The second stage tests the hypothesis between the best treatment selected at the first stage (if any) and the standard treatment. All the treatments are assumed to follow normal distributions and the best treatment is the one with the largest population mean. The level and the power are defined and they are used to set up equations to solve unknown first stage sample size, second stage sample size, and procedure parameters. The optimal design is the one that gives the smallest average sample size. Numerical results are presented to illustrate the improvement of one design as compared to existing one stage design.
The Effect of Categorization on Balanced Incomplete Blocks and Latin Squares
Authors: Rayner J. C. W. , Liddell G. F. , Seyb A. J. 
Published: May 2007

AbstractRobustness in the various analysis of variance models should be assessed with regard to all the assumptions. Here we assess the effect of the continuity assumption. The models considered were chosen because they are in a sense fragile, and the effects might be anticipated to be more dramatic here. We identify at least one of the balanced incomplete block models for which severe categorization leads to tests with unacceptable sizes and aberrant power curves. Otherwise most of the models examined are generally satisfactory – that is, robust with respect to the continuity assumption.
Optimal Testing for Serial Correlation in a Large Number of Small Samples
Authors: Bhatti Muhammad I. 
Published: May 2007

AbstractIn recent years, there has been an increased awareness of the potential one‐sided nature of many testing problems in applied sciences. Usually, these testing problems can be reduced, either by conditioning on sufficient statistics or by invariant techniques. COX and SOLOMON (1988) considered testing the serial correlation coefficient of a stationary first order autoregressive process and concentrated on four independent samples, with each of size three. We outline a general method for testing the serial correlation coefficient, using locally best invariant, point optimal invariant and locally most mean powerful invariant test procedures. The first procedure optimizes power near the null hypothesis, the second optimizes it at a pre‐determined point away from the null while the third optimizes the average curvature of the power hypersurface in the neighbourhood of the null hypothesis.
Bootstrap and Asymptotic Prediction Criterion Estimates for Binomial Proportions in Insemination Data
Authors: Bonneu M. , Lavergne C. 
Published: May 2007

AbstractModel choice techniques are proposed for logistic regression, based on prediction criterion estimation similar to Akaike's information criterion. For artificial insemination data of cattle, we wish to study a factor influence on success proportion; tests standard methods don't always seem suitable for prediction objective. Two prediction criterion estimate methods are applied to these data: simulated bootstrap and asymptotic estimates. Some empirical properties of this estimate are studied.
Spectroscopic studies on origination of the peak at 730 nm in delayed fluorescence of chloroplasts
Authors: Zeng Lizhang , Xing Da , Zhang Lingrui , Li Qiang , Wang Chenglong 
Published: May 2007

AbstractThe origination of the peak at 730 nm in the delayed fluorescence (DF) spectrum of chloroplasts was studied using various optical analysis methods. The DF spectrum showed that the main emission peak was at about 685 nm, with a small shoulder at 730 nm when the chloroplast concentration was < 7.8 µg/mL. The intensity of the peak at 685 nm decreased, while the intensity of the peak at 730 nm increased, when the chloroplast concentrations were increased from 7.8 to 31.2 µg/mL. With the concentration increasing, the peak at 730 nm became dominant while the peak at 685 nm finally disappeared. The DF decay kinetic curves showed that the intensity of the peak at 730 nm decayed as the same speed as the intensity of the peak at 685 nm during the entire relaxation process (0.5–30.5 s). With the excitation wavelength at 685 nm, the emission intensity was stronger in the excitation spectrum at 730 nm. The absorption spectrum demonstrated that the ratioA685:A730remained almost constant when the chloroplast concentration increased. The results suggest that the peak at 730 nm appearing in DF is mainly contributed by the fluorescence of photosystem I (PSI), generated by the re‐absorption of 685 nm band DF. Copyright © 2007 John Wiley & Sons, Ltd.
Chemiluminescence of bicyclic dioxetanes bearing a hydroxyphenyl moiety substituted with carbazolyl, indolyl or benzotriazolyl group in the coordination sphere
Authors: Matsumoto Masakatsu , Yamada Kazutaka , Watanabe Nobuko , Ijuin Hisako K. 
Published: May 2007

AbstractBicyclic dioxetanes bearing a 3‐(carbazol‐9‐yl)‐5‐hydroxyphenyl 2a, 3‐hydroxy‐5‐(indol‐1‐yl)phenyl 2b, or 3‐(benzotriazol‐1‐yl)‐5‐hydroxyphenyl group 2c were synthesized. Base‐induced decomposition of dioxetane 2a displayed intense light, the maximum wavelength (λmaxCTICL) of which changed depending on the crown ether complex of potassium t‐butoxide used as a base, although the magnitude of λmaxCTICL change was considerably smaller than the case of dioxetane bearing a 3‐(anthracen‐9‐yl)‐5‐hydroxyphenyl group 1. Chemiluminescence (CL) from 2b resembled closely that from 2a in response to the crown ether complexes. On the other hand, dioxetane 2c exhibited emission of red light on treatment with tetrabutylammonium fluoride. The colour of light changed significantly and exhibited two peaks in the CL spectrum when treated with complex of bulky dibenzyldiazacrown ether 13. Copyright © 2007 John Wiley & Sons, Ltd.
Lead Rare‐Earth Oxyhalides: Syntheses and Characterization of Pb6LaO7X (X: Cl, Br).
Authors: Siidra Oleg , Krivovichev Sergey V. , Armbruster Thomas , Depmeier Wulf 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Incorporation of 3d‐Metal Ions in the Hexagonal Channels of the Sr5(PO4)3OH Apatite.
Authors: Kazin Pavel E. , Gazizova Olga R. , Karpov Andrey S. , Jansen Martin , Tretyakov Yuri D. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Determination of Standard Molar Enthalpies of Formation for the Two Barium Borates BaB2O4×xH2O (x = 4, 0) by Microcalorimetry.
Authors: Liu Zhi‐Hong , Wang Yan , Huang Hong‐Sheng 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Subsolidus Phase Relations in CuWO4—Gd2WO6 System.
Authors: Tomaszewicz E. , Worsztynowicz A. , Kaczmarek S. M. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Sn0.9Si0.1/Carbon Core—Shell Nanoparticles for High‐Density Lithium Storage Materials.
Authors: Kwon Yoojung , Kim Hansu , Doo Seok‐Gwang , Cho Jaephil 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
New Lanthanide‐Containing Polytungstates Derived from the Cyclic P8W48 Anion: {Ln4(H2O)28 [K@P8W48O184 (H4W4O12)2Ln2 (H2O)10]13‐}x, Ln: La, Ce, Pr, Nd.
Authors: Zimmermann Matthias , Belai Nebebech , Butcher Raymond J. , Pope Michael T. , Chubarova Elena V. , Dickmann Michael H. , Kortz Ulrich 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
[SrF0.8(OH)0.2]2.526 [Mn6O12]: Columnar Rock‐Salt Fragments Inside the Todorokite‐Type Tunnel Structure.
Authors: Abakumov Artem M. , et al. et al. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of Covellite (CuS) from the Elements.
Authors: Tezuka Keitaro , Sheets William C. , Kurihara Ryoko , Shan Yue Jin , Imoto Hideo , Marks Tobin J. , Poeppelmeier Kenneth R. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Cyclopropyl Building Blocks for Organic Synthesis. Part 138. Diels—Alder Reactions of Novel (1′‐Arylallylidene)cyclopropanes with Heterodienophiles.
Authors: Zhao Ligang , Yucel Baris , Scheurich Rene Peter , Frank Daniel , de Meijere Armin 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Cycloaddition Reactions of 1‐Aza‐ and 1,3‐Diazaazulenium 1‐Methylides.
Authors: Fujii Hiroyuki , Kawano Izumi , Iwafuji Kaoru , Sawae Yoshiyuki , Nagamatsu Kentaro , Abe Noritaka 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Titanium Tetraiodide Mediated Reductive Opening of Aziridines, Leading to the Aldol and Mannich‐Type Reactions.
Authors: Shimizu Makoto , Kurokawa Hiroshi , Nishiura Shuji , Hachiya Iwao 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Transformations of 2‐Trifluoroacetyl‐4,5,6,7‐tetrahydro‐1H‐pyrrolo[3,2‐c]pyridines by the Action of Ethyl Propynoate. A Novel Synthesis of 2‐Trifluoroacetyl‐4,7,8,9‐tetrahydro‐1H‐pyrrolo[2,3‐d]azocines.
Authors: Voskresenskii L. G. , Borisova T. N. , Vorob'eva T. A. , Grishachkina O. V. , Kulikova L. N. , Chernyshev A. I. , Varlamov A. V. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Catalytic Intermolecular Amination of C—H Bonds: Method Development and Mechanistic Insights.
Authors: Fiori Kristin Williams , Du Bois J. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Rhodium‐Catalyzed Hydroallylation of Activated Alkenes.
Authors: Muraoka Takako , Matsuda Isamu , Itoh Kenji , Ueno Keiji 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Aminocatalysis of the Baylis—Hillman Reaction: An Important Solvent Effect.
Authors: Davies Huw J. , Ruda Antionio M. , Tomkinson Nicholas C. O. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Lewis Acid—Lewis Base‐Catalyzed Enantioselective Addition of α‐Ketonitriles to Aldehydes.
Authors: Lundgren Stina , Wingstrand Erica , Moberg Christina 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Expedient Synthesis of Sulfinamides from Sulfonyl Chlorides.
Authors: Harmata Michael , Zheng Pinguan , Huang Chaofeng , Gomes Maria G. , Ying Weijiang , Ranyanil Kanok‐On , Balan Gayatri , Calkins Nathan L. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enantioselective Sulfoxidation and Kinetic Resolution Combined Protocol Mediated by a Functionalized (S)‐Norcamphor‐Based Hydroperoxide/Titanium(IV) Isopropoxide System.
Authors: Lattanzi Alessandra , Piccirillo Sandro , Scettri Arrigo 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Suzuki—Miyaura Coupling Reaction of Aryl Chlorides Using Di(2,6‐dimethylmorpholino)phenylphosphine as Ligand.
Authors: Cho Su‐Dong , Kim Ho‐Kyun , Yim Heung‐seop , Kim Mi‐Ra , Lee Jin‐Kook , Kim Jeum‐Jong , Yoon Yong‐Jin 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Aromatic Thioesters as Protecting Groups for Thiols Against 1,2‐Didehydrobenzenes.
Authors: Fowelin Christian , Schuepbach Bjoern , Terfort Andreas 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
One‐Pot Regioselective Synthesis of Dihydronaphthofurans and Dibenzofurans.
Authors: Dixit Manish , Raghunandan Resmi , Kumar Brijesh , Maulik P. R. , Goel Atul 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Trimethylsilylpyrazoles as Novel Inhibitors of p38 MAP Kinase: A New Use of Silicon Bioisosteres in Medicinal Chemistry.
Authors: Barnes Matthew J. , Conroy Richard , Miller David J. , Mills John S. , Montana John G. , Pooni Parminder , Showell Graham A. , Walsh Louise M. , Warneck Julie B. H. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Bromoallenes as Allyl Dication Equivalents in the Presence or Absence of Palladium(0): Direct Construction of Bicyclic Sulfamides Containing Five‐ to Eight‐Membered Rings by Tandem Cyclization of Bromoallenes.
Authors: Hamaguchi Hisao , Kosaka Shohei , Ohno Hiroaki , Fujii Nobutaka , Tanaka Tetsuaki 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Efficient Synthesis of Benzo[g]‐ and Benzo[h]chromene Derivatives by One‐Pot Three‐Component Condensation of Aromatic Aldehydes with Active Methylene Compounds and Naphthols.
Authors: Kumar B. Sunil , Srinivasulu N. , Udupi R. H. , Rajitha B. , Reddy Y. Thirupathi , Reddy P. Narsimha , Kumar P. S. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Cascade Michael—Aldol Reactions Promoted by Hydrogen Bonding Mediated Catalysis.
Authors: Zu Liansuo , Wang Jian , Li Hao , Xie Hexin , Jiang Wei , Wang Wei 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Concise and Short Synthesis of Functionalized 5,6‐Dihydropyridin‐2‐ones (X) by Means of Palladium(0)‐Catalyzed Cross‐Coupling of Ketene Aminal Phosphates (V).
Authors: Fuwa Haruhiko , Kaneko Akane , Sugimoto Yasuaki , Tomita Taisuke , Iwatsubo Takeshi , Sasaki Makoto 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.