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Articles 61 - 90 of 168
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Palladium-Catalyzed Vinylic Substitution Of Aryl Halides On Polymeric Nitrogen Supports., Chia-Hsing Sun
Palladium-Catalyzed Vinylic Substitution Of Aryl Halides On Polymeric Nitrogen Supports., Chia-Hsing Sun
LSU Historical Dissertations and Theses
The structure of typical palladium complexes used as catalysts in organic synthesis is reviewed; particular attention is paid to the systematic study of palladium catalyzed vinylic substitution on a variety of aryl iodides and bromides (Heck-type vinylation). The general conditions of this process, i.e., a homogeneous catalyst operating at moderate temperature, which requires a proton acceptor to complete the catalyst cycle, are conducive to successful development of a polymer-bound catalyst. Using 4-picoline as a ligand under homogeneous Heck-type vinylation conditions. Morpholine is an adequate base to stabilize the catalytic picoline complex when aryl iodides are condensed with styrene. However, sodium …
Analysis Of Factors Influencing The Agricultural Research Delivery System In Liberia., Walter Tamu Wiles
Analysis Of Factors Influencing The Agricultural Research Delivery System In Liberia., Walter Tamu Wiles
LSU Historical Dissertations and Theses
Purpose. This study was carried out to assess the types of channels through which research information is disseminated to the farmer through the agricultural research delivery system in Liberia, and factors which influence the delivery of such information. Population. The population for this study consisted of 324 respondants which included 15 researchers, 127 field extension workers and 182 farmers. Data were gathered specifically from researchers working at the Central Agricultural Research Institute (CARI) and field extension workers and farmers in Bong, Lofa and Nimba counties respectively. Objectives. Two specific objectives of the study were: (1) to present profiles of the …
Molecular Studies Of T-Lymphocytes From Bovine Leukemia Virus-Infected Cattle., Diana Lynn Williams
Molecular Studies Of T-Lymphocytes From Bovine Leukemia Virus-Infected Cattle., Diana Lynn Williams
LSU Historical Dissertations and Theses
Highly specific monoclonal antibodies and microfluorimetry were used to determine the absolute number of B and T lymphocytes in the peripheral blood of bovine leukemia virus (BLV) infected cattle. The peripheral blood lymphocyte populations from BLV-infected cattle were elevated when compared to BLV-negative animals. The increase in the lymphocyte population in the aleukemic (AL) animals was due to an increase in T lymphocytes. In the PL animals the increase was due mainly to an increase of B lymphocytes but also to an increase of T lymphocytes. The PL animals showed a significantly higher number of surface immunoglobulin positive cells (sIg('+)) …
Development Of A New Conductivity Model For Shaly Sand Interpretation., Pedro L. Silva
Development Of A New Conductivity Model For Shaly Sand Interpretation., Pedro L. Silva
LSU Historical Dissertations and Theses
In this dissertation, a new theoretical conductivity model for shaly sands is developed. The model is based on dual water concepts. In addition, the equivalent counterion conductivity changes as the diffuse electrical double layer expands and is then a function of temperature, shaliness, and of the conductivity of the far water. The formation resistivity factor used in the model is independent of shaliness. A method to calculate the equivalent counterion conductivity is proposed. This method is based on treating the double layer region as a hypothetical electrolyte, the properties of which are derived from basic electrochemistry theory. The new model …
A Dynamics And Sedimentology Study Of Eastern Atchafalaya Bay, Louisiana (Cluster Analysis, Estuarine)., Chaoyu Wu
LSU Historical Dissertations and Theses
A new Mississippi River Delta is building in Atchafalaya Bay of southcentral Louisiana as a result of a upstream natural diversion in river course. The present study focuses on several distinct but complementary aspects of the physical processes of the modern Atchafalaya River Delta. Coherence analysis reveals that the subtidal fluctuations of water stage and current velocity in the estuarine area are closely related to atmospheric forcing at different time scales. The water stage fluctuations at Morgan City had significant variance at time scale 2.5-10 days which was driven by local longitudinal (north-south) winds. There were also fluctuations at periods …
An Experimental And Theoretical Analysis Of Diverter System Performance., Frederick Eugene Beck
An Experimental And Theoretical Analysis Of Diverter System Performance., Frederick Eugene Beck
LSU Historical Dissertations and Theses
Diverter systems, used as an alternate means of well control while drilling surface hole, have a demonstrated history of failure. Of particular interest in this dissertation are failures related to excessive backpressure, such as mechanical failure of surface equipment or the loss of the rig due to foundation collapse. Critical flow effects, neglected by current design practices, are shown both experimentally and theoretically to have a significant effect on backpressure. Critical flow is modeled by quantifying exit pressures and by including fluid acceleration pressure losses in backpressure calculations. "Systems analysis" of diverter operations is developed and applied to a field …
Fate And Transport Of Low-Ph Hazardous Materials After Deep Well Disposal., Winton G. Aubert
Fate And Transport Of Low-Ph Hazardous Materials After Deep Well Disposal., Winton G. Aubert
LSU Historical Dissertations and Theses
The ultimate fate and chemical kinetics of low-pH hazardous wastes after deep well injection were studied. Two experimental approaches were taken. Chemical kinetics of reactions involving acids and typical formation clays was studied using a batch reaction scheme. The effects of reactions involving flowing acidic waste streams and disposal formations were characterized using sand packs of length one foot, four feet, and twenty feet. A numerical ground water flow simulator was used to model the interactions of flowing acidic wastes with linear sand packs and with a hypothetical waste disposal system. Reaction rate coefficients and activation energies were determined for …
The Effects Of Structural Model Misspecification And Sample Size On The Robustness Of Lisrel Maximum Likelihood Parameter Estimates (Monte Carlo)., Beatrice Ott Baldwin
The Effects Of Structural Model Misspecification And Sample Size On The Robustness Of Lisrel Maximum Likelihood Parameter Estimates (Monte Carlo)., Beatrice Ott Baldwin
LSU Historical Dissertations and Theses
Researchers using the LISREL (linear structural relations) program developed by Joreskog and Sorbom (1984) for the purpose of estimating parameters of structural equation models must make important assumptions. The researcher must assume large sample size (asymptotic theory) and a multivariate normal distribution for the indicator variables. In addition, theoretical assumptions as to the appropriateness of the model specification must also be made. The Monte Carlo study examines the robustness of maximum likelihood parameter estimates under varying degrees of model misspecification. The effects of errors of omission, errors of inclusion, and simultaneous errors of omission and inclusion are studied for sample …
The Relationship Between Interaction Time And Reading And Math Achievement For Chapter I Students Using Computer-Assisted Instruction In Grades Three, Four And Five., Betty Josephine Conaway Archambeault
The Relationship Between Interaction Time And Reading And Math Achievement For Chapter I Students Using Computer-Assisted Instruction In Grades Three, Four And Five., Betty Josephine Conaway Archambeault
LSU Historical Dissertations and Theses
The role of computer technology, particularly computer-assisted instruction, in the educational delivery system has steadily increased over the last decade. Although the largest number of CAI programs can be categorized as drill and practice, an increasing number of high quality simulation and tutorial programs are becoming available. The interactive nature of CAI is supported by the learning theories of Piaget, Gagne, and other learning theorists. Research on the topic indicates that CAI has a generally positive effect on student achievement and fosters positive attitudes among students and instructors toward the learning environment. This research study had two goals. The first …
The Response Of Saccharum Species To Growth Regulators Used As Tillering Agents (Sugarcane)., Keith P. Bischoff
The Response Of Saccharum Species To Growth Regulators Used As Tillering Agents (Sugarcane)., Keith P. Bischoff
LSU Historical Dissertations and Theses
This study was conducted to identify those plant growth regulators that cause the greatest increase in shoot number of basic genotypes of the genus Saccharum and at the same time identify those genotypes that exhibit a high degree of response to certain growth regulators which have been proposed as tillering agents. A series of three factorial experiments was conducted under controlled conditions in the greenhouse utilizing fourteen cultivars representing the spectrum of the genus Saccharum along with five synthetic growth regulators proposed as tillering agents. Treatments were applied to the plants one month after germination. Shoot number and shoot height …
Fluorescence Of Proanthocyanidin Polymers (Rotational Isomer)., Wolfgang Robert Bergmann
Fluorescence Of Proanthocyanidin Polymers (Rotational Isomer)., Wolfgang Robert Bergmann
LSU Historical Dissertations and Theses
The lifetimes and quantum yields of proanthocyanidins, monomers and dimers of catechin and epicatechin, were measured. The fluorescence quantum yield and lifetime of the monomers was three times greater in dioxane than in water. The fluorescence decay curves of catechin and epicatechin were found to be fit best by a monoexponential function. The fluorescence decay of dimers of epicatechin and catechin were best fit to a sum of two exponentials. The fluorescence decay curve of a bridged dimer, Procyaninidin A-2, in dioxane was best fit to a monoexponential function. The 400 MHz proton NMR spectra of Procyanidin B-1 decaacetate in …
Studies On The Molecular Cloning Of "Aryletherase" From A Ligninolytic Erwinia Sp.: Enhancement Of Gene Expression., Jeffrey William Cary
Studies On The Molecular Cloning Of "Aryletherase" From A Ligninolytic Erwinia Sp.: Enhancement Of Gene Expression., Jeffrey William Cary
LSU Historical Dissertations and Theses
Recombinant DNA techniques were used to enhance the expression of a gene encoding "aryletherase" activity. This gene, apparently lacking regulatory elements, was present on a 792bp BamHI DNA fragment of Erwinia sp. genomic DNA, that was cloned into Escherichia coli using the plasmid vector pBR322. To obtain a larger fragment of Erwinia genomic DNA carrying the "aryletherase" gene and its regulatory regions, an Erwinia sp. genomic DNA library was constructed in the lambda phage EMBL3. Screening the library with nick translated 792bp BamHI fragment identified several recombinant phage which demonstrated homology with the probe. Restriction digestion of DNA from one …
The Topological Information Retrieval System And The Topological Paradigm: A Unification Of The Major Models Of Information Retrieval., Steven C. Cater
The Topological Information Retrieval System And The Topological Paradigm: A Unification Of The Major Models Of Information Retrieval., Steven C. Cater
LSU Historical Dissertations and Theses
There are three topics discussed in this work. The first topic is an investigation of the topological properties of the p-norm model of Salton, Fox, and Wu. It is shown that certain properties of the p-norm model that one would expect to hold, given the topological origin of the model, do not in fact hold. These properties include the ability to change the query by changing p, and the ability to adequately separate documents. Since these properties do hold in the model as actually constructed, it must be that the properties do not follow from the topological origin of the …
Neogene Foraminifera Of The Limon Basin Of Costa Rica., David Terrance Cassell
Neogene Foraminifera Of The Limon Basin Of Costa Rica., David Terrance Cassell
LSU Historical Dissertations and Theses
The distribution of foraminifera in the Uscari, Rio Banano, Moin Formations of the Limon Basin, Costa Rica, is the subject of this study. Heterostegina antillea and Lepidocyclina (L.) waylandvaughani place the basal Uscari Formation of Quebrada Terciopelo in Zone N3 of the latest Oligocene. The overlap of Orbulina universa and Globorotalia fohsi peripheroronda places the type section Uscari Formation in the early Middle Miocene (zones N9 to N10). The overlapping ranges of planktonic foraminifera and the ostracods Radimella ovata in the sandstones places that unit in Zone N18 of Early Pliocene. Globorotalia truncatulinoides excelsa indicates a Pleistocene age for the …
The Effects Of Alcohols And Crude Oil Composition On The Performance And Mechanisms Of Alkaline Flooding Of Oil Reservoirs., Mohamed Amine Dahmani
The Effects Of Alcohols And Crude Oil Composition On The Performance And Mechanisms Of Alkaline Flooding Of Oil Reservoirs., Mohamed Amine Dahmani
LSU Historical Dissertations and Theses
Alkaline flooding for enhanced oil recovery was investigated and methods were developed to increase the efficiency and predictability of the process. The problems associated with current alkaline flooding technology were addressed in three ways. The effect of alcohol additives on alkaline flooding was studied since alcohols have benefited related surfactant procedures. Crude oil composition was correlated with flood behavior to provide better predictions of alkaline flood performance. Finally, alkaline flood recovery efficiencies of oxidized crudes were measured to determine the benefits of in-situ air oxidation. The alkaline flooding process was studied through the use of interfacial tension measurements, microscopic examination …
Acceptability Of Social Skills Training Methods (Sociometrics)., Lillee Coleman Clark
Acceptability Of Social Skills Training Methods (Sociometrics)., Lillee Coleman Clark
LSU Historical Dissertations and Theses
This study examined the acceptability of social skills treatment methods as rated by elementary school teachers. Independent variables such as target problem (aggressive versus withdrawn social skills deficits), treatment method (modeling-coaching versus overcorrection), and outcome information (weak versus strong therapeutic effects) were systematically manipulated to determine which treatment method teachers preferred to remediate social skills deficits in their classrooms. Also of interest was the effect of outcome information on teachers' ratings of acceptability. Two measured independent variables included were the Knowledge Assessment and the Intervention Use Assessment to determine teachers' knowledge of treatments presented and how frequently treatments had been …
The Relationship Between Teachers' Perceptions Of Principals' Job Performance, Teacher Job Satisfaction, Principal Influence And School Outcomes., John Aaron Jackson
The Relationship Between Teachers' Perceptions Of Principals' Job Performance, Teacher Job Satisfaction, Principal Influence And School Outcomes., John Aaron Jackson
LSU Historical Dissertations and Theses
This study investigated the relationship between principals' instructional leadership behavior and school effectiveness. In the conceptual model tested, certain school context variables, teachers' job satisfaction and teachers' willingness to accept principals' influence in the instructional realm, were viewed as mediating the relationship between principals' behavior and school outcomes. From this perspective, principals' instructional leadership behavior was seen as being indirectly related to school outcomes by its impact on these mediating variables. For the purposes of this study, teachers' job satisfaction, teachers, willingness to accept principals' professional advice and teachers' perceptions of principals' effectiveness as instructional leaders served as independent variables. …
Para-Social Interaction, Rhetorical Sensitivity, And Television News Viewing., Michael Anthony Domingue
Para-Social Interaction, Rhetorical Sensitivity, And Television News Viewing., Michael Anthony Domingue
LSU Historical Dissertations and Theses
This study sought to determine the relationship between para-social interaction (an imaginary interaction with mass media) with local and network news viewing and rhetorical sensitivity (an attitude toward encoding spoken messages). It was predicted that para-social interaction would be positively related to rhetorical sensitivity. The Rubin, Perse, and Powell PSI Scale was used to measure para-social interaction. The three internal scales of the Hart, Carlson and Eadie RHETSEN II Scale (the Noble Self Scale, the Rhetorical Reflector Scale and the Rhetorical Sensitivity Scale) were used to measure rhetorical sensitivity. 157 undergraduates enrolled in communication courses responded to scales. A canonical …
New Types Of Lanthanide Complexes (Polyatomic Oxides)., Ishenkumba Albert Kasimbazi Kahwa
New Types Of Lanthanide Complexes (Polyatomic Oxides)., Ishenkumba Albert Kasimbazi Kahwa
LSU Historical Dissertations and Theses
Three new types of lanthanide (Ln) complexes, namely, the first examples of homodinuclear macrocyclic lanthanide complexes, novel binary and ternary gaseous polyatomic lanthanide oxides and new lanthanide oxalato complexes are described in chapters one, two and three respectively. The homodinuclear complexes are 2:2 condensation products of 2,6-diformyl-p-cresol and triethylenetetramine templated by Ln(NO(,3))(,3) and Ln(ClO(,4))(,3). The complexes are dimorphic, and are off-white (the more stable form) when they are obtained from dilute solutions and orange if they arise from more concentrated reactants. The complexes were characterized by elemental analysis, fast atom bombardment mass spectrometry (FAB MS), electronic absorption and IR spectroscopy, …
Genomic Organization And Sequence Analysis Of Rabbit Muscle Phosphofructokinase Gene., Chan Ping Lee
Genomic Organization And Sequence Analysis Of Rabbit Muscle Phosphofructokinase Gene., Chan Ping Lee
LSU Historical Dissertations and Theses
A rabbit genomic clone containing the muscle phosphofructokinase (PFK) gene of approximately 17 kilobase pairs encoding 779 amino acids was isolated and sequenced. This gene contains 22 exons, ranging from 45 to 190 base pairs, and is split by 21 introns of 73-3500 base pairs. Eighty six percent of this gene is occupied by introns. An additional incomplete intron is found in the 5' flanking region, while an Alu-like sequence is identified in the 3' flanking region. The amino acid sequence translated from the coding sequence of this gene reveals 29 residues (amino acid numbers 479-507) which complete a previously …
Mud Deposition At The Shoreface: Wave And Sediment Dynamics On The Chenier Plain Of Louisiana., George Paul Kemp
Mud Deposition At The Shoreface: Wave And Sediment Dynamics On The Chenier Plain Of Louisiana., George Paul Kemp
LSU Historical Dissertations and Theses
Sedimentological data, and high-resolution current velocity time-series were acquired nearshore along the muddy coast of Louisiana's chenier plain. Results suggest that the 2 to 10 cm thick, laminated and graded silt/shell + mud beds which characterize shoreface mudflat sedimentation form through intermittent dumping of fluid mud suspensions. Cohesive and non-cohesive sediments are first separated and concentrated by shear within a wave boundary layer (WBL). Rapid sedimentation, or "freezing", of the mud fraction occurs when the yield strength of the fluid mud suspension equals that of the WBL shear stress. Incident waves were well described by shallow water linear wave theory, …
The Algebraic Image Of The Asymmetric Top., Yorck Leschber
The Algebraic Image Of The Asymmetric Top., Yorck Leschber
LSU Historical Dissertations and Theses
The algebraic realization of the quantum mechanical rotor by the SU(3) (--->) SO(3) algebra is investigated. It is shown that a hamiltonian built from rotationally invariant functions of SU(3) generators reproduces the eigenvalues of the rotor hamiltonian. The equivalence of both models is established also for the quadrupole transition rates and the D(,2) symmetry of the rotor. The relation between the SU(3) (--->) SO(3) algebra and the nuclear shell model allows therefore a microscopic interpretation of rotational motion as a many-particle effect.
Effects Of Straw Residues On Soil Erosion (Rainfall)., Keith Carvis Mcgregor
Effects Of Straw Residues On Soil Erosion (Rainfall)., Keith Carvis Mcgregor
LSU Historical Dissertations and Theses
The objectives of this study were to determine the effects on interrill erosion and runoff of: (1) various rates of surface straw, (2) various rates of incorporated straw, and (3) various rates of incorporated straw over two levels of surface straw. A randomized block design, a completely randomized block design and a 4 x 2 factorial using a randomized block design was used for objectives 1, 2 and 3, respectively. Grenada silt loam soil was placed in a 0.91 by 0.91-m soil pan with a central 0.46 by 0.46-m test area. The soil pan was on 2.5% slope. Simulated rainfall …
Mechanisms Of The Atmospheric Corrosion Of Weathering Steel., Mehmet Baha Kuban
Mechanisms Of The Atmospheric Corrosion Of Weathering Steel., Mehmet Baha Kuban
LSU Historical Dissertations and Theses
The atmospheric corrosion mechanisms of weathering steel have been investigated through the use of both field and laboratory techniques. Laboratory techniques included time-transformation studies of the oxide-hydroxides (gamma)-FeOOH and (beta)-FeOOH under controlled temperature conditions in air and in vaccum, as well as electrochemical testing for the characterization of the dissolution and film formation kinetics. Potentiostatic tests with set potentials in the immediate vicinity of the open circuit potential of the weathering steel were found to simulate very well the conditions of atmospheric exposure. 0.1% NaCl solutions as well as other concentrations were generally used for comparison purposes. The specific adsorption …
The Rhetoric Of Lee Iacocca: The Man, The Myth, The Message (Michigan)., Jayne Margaret Megginson
The Rhetoric Of Lee Iacocca: The Man, The Myth, The Message (Michigan)., Jayne Margaret Megginson
LSU Historical Dissertations and Theses
The purpose of this study was to analyze the rhetoric of Lee A. Iacocca as expressed in the thoughts and actions of the man; to explore rhetorical aspects of his popular myth-hero qualities; and to examine the rhetorical strategies Iacocca used in presenting his message. Criteria for the study were based on the rhetorical theories of Ernest Bormann, Lloyd Bitzer, and Kenneth Burke, with an emphasis on two of Aristotle's canons. In addition, the pattern for the myth-hero as presented by Joseph Campbell was a guide. These concepts blended into an interrelationship which helped illuminate the dimensions of Iacocca's rhetorical …
Testing A Model Of School Holding Power: Teacher Perceptions Of The Work Environment, Robustness, Personal Characteristics, And Alienation Behavior. (Volumes I And Ii)., Bernadette Susanne Morris
Testing A Model Of School Holding Power: Teacher Perceptions Of The Work Environment, Robustness, Personal Characteristics, And Alienation Behavior. (Volumes I And Ii)., Bernadette Susanne Morris
LSU Historical Dissertations and Theses
The purpose of the study was to examine relationships between indices of teacher alienation behavior (TAB) and (a) teacher perceptions of multiple dimensions of the work environment, (b) environmental robustness, and (c) teacher personal life characteristics. Teacher perceptions of the work environment and the robustness of key roles in the school organization were explored as factors contributing to the holding power of school. Twenty teachers at each of 97 schools in a large urban school district in Louisiana were randomly selected. Each teacher responded to an instrument set containing a demographic data form, Job Satisfaction Scale (JSS) (Johnson, 1955), Robustness …
Sedimentology And Stratigraphy Of The Fig Tree Group, West Limb Of The Onverwacht Anticline, Barberton Greenstone Belt, South Africa., Bruce William Nocita
Sedimentology And Stratigraphy Of The Fig Tree Group, West Limb Of The Onverwacht Anticline, Barberton Greenstone Belt, South Africa., Bruce William Nocita
LSU Historical Dissertations and Theses
Sedimentary rocks of the 3.2-3.2 Ga old Fig Tree Group in the southwest part of the Barberton Greenstone Belt in South Africa can be divided into three informal formations. The lowest unit, Formation A, is composed mostly of silicified pyroclastic debris and carbonaceous cherts. Formation B has four lithofacies--siltstone; sandstone; jaspilite; and bedded barite. Two coarse-grained lithofacies make up Formation C. In the western portion of the study area there is chert-clast conglomerate and in the eastern part of the study area is volcanic-clast conglomerate, breccia, and sandstone. In the western portion of the study area Formations B and C …
Populations, Selection Mechanisms, And Performance: A Study Of Banks In The State Of Louisiana., Merle John Peper
Populations, Selection Mechanisms, And Performance: A Study Of Banks In The State Of Louisiana., Merle John Peper
LSU Historical Dissertations and Theses
Many theoretical paradigms have been created in an effort to successfully measure organizational performance. One of the more recent approaches, known as the "population perspective," focuses on populations of organizations as its unit of analysis, and attempts to explain the relationships among organizations, populations, and environments. These relationships are explored by (a) grouping organizations into homogeneous clusters or populations, and (b) assessing alternative selection mechanisms or predictors of organizational prosperity. The studying of populations help define the organizational forms allowing survival within an environment, while increasing the generalizability of the study's findings. Studying selection mechanisms within their populations allows the …
An Empirical Investigation Of The Comparability Of Reported Earnings Per Share Under Accounting Principles Board Opinion No. 15., Suzanne Resi Pinac-Ward
An Empirical Investigation Of The Comparability Of Reported Earnings Per Share Under Accounting Principles Board Opinion No. 15., Suzanne Resi Pinac-Ward
LSU Historical Dissertations and Theses
Earnings per share (EPS) is considered by many to be one of the most important summary indicators presented in the financial statements. Many financial statement users rely on EPS as the most important single measure of corporate performance. Previous empirical evidence suggests that a strong link exists between EPS changes and stock price changes. The objective of this study was to determine if the provisions of APB 15 provide for consistent reporting of comparable EPS figures across preparers of financial statements. The application of alternative interpretations of provisions of APB 15 has the potential to produce materially different EPS figures. …
On The Martingale Problem For Infinite Dimensional Stochastic Differential Equations., Robert W. Riordan
On The Martingale Problem For Infinite Dimensional Stochastic Differential Equations., Robert W. Riordan
LSU Historical Dissertations and Theses
The purpose of this dissertation is to establish, in a certain infinite dimensional setting, some existence and uniqueness results pertaining to the type of exponential martingale problem previously considered by Strook and Varadhan in the finite dimensional setting. The setting is among those considered by K. Ito in his work on stochastic differential equations in infinite dimensional spaces. Briefly, the martingale problem takes the following form: to show the existence and uniqueness of a measure m on the space S of continuous functions defined on the nonnegative real lien with values in some state space, having the property that exp(f(t,w)) …