nÃo hà / A estimativa da idade cronolÃgica pode ser conceituada como o processo que consiste em avaliar o estÃgio de evoluÃÃo ou involuÃÃo de um organismo. O exame para estimativa da idade cronolÃgica do indivÃduo pela avaliaÃÃo dentÃria constitui uma perÃcia que pela lei do exercÃcio profissional da Odontologia pode ser realizada pelo CirurgiÃo-Dentista. Este exame corresponde a um percentual significativo dos exames realizados nos Institutos MÃdicos Legais (IML). No IML de Fortaleza â CearÃ, este percentual representa 32,4% dos exames realizados. Este estudo teve como objetivo analisar os procedimentos de estimativa da idade cronolÃgica do indivÃduo pela avaliaÃÃo dentÃria realizado no IML de Fortaleza, com embasamento nos procedimentos e mÃtodos de estimativa da idade cronolÃgica descritos na literatura. Foi realizado um levantamento bibliogrÃfico sobre o tema onde se constatou que a estimativa da idade cronolÃgica tem diversas nuances, à estudada hà bastante tempo e existem mÃtodos com resultados com alto grau de confianÃa, sendo bastante solicitada em processos policiais e judiciais. Os dados de importÃncia para a estimativa da idade pelo exame dos dentes permanentes se distribuem nas etapas de sua evoluÃÃo: mineralizaÃÃo, erupÃÃo e modificaÃÃes dentÃrias tardias. O termo DENTIÃÃO tem um sentido dinÃmico, uma vez que define uma sÃrie de fases desde o espessamento do epitÃlio da camada basal atà a perda do dente. Jà DENTADURA à estÃtico, pois define somente uma determinada fase da vida do indivÃduo: à o conjunto dos dentes naquele momento. Neste Ãltimo caso, na perÃcia para estimativa de idade examina-se a dentadura do indivÃduo naquele momento. O desenvolvimento da radiologia odontolÃgica introduziu novos mÃtodos à estimativa de idade, que aumentaram o grau de confianÃa da mesma. A inspeÃÃo direta dos dentes à o mÃtodo atualmente utilizado para realizar a estimativa da idade cronolÃgica dos indivÃduos no IML â Fortaleza. Este estudo concluiu que tais procedimentos necessitam ser complementados por exames radiolÃgicos para que os resultados sejam mais fidedignos, os quais irÃo propiciar a determinaÃÃo da idade cronolÃgica dos indivÃduos com maior acurÃcia. / The estimation of chronological age can be defined as the process that evaluates the stage of evolution or involution of a body. The age determination by a dental evaluation is a technical inspection that can be performed by a Surgeon-Dentist, in accordance with the law of dentistry practice. This examination is carried through in legal medicine institutes with high frequency. In the Institute of Legal Medicine (IML) of Fortaleza - CearÃ, this percentage is 32.4% of all examinations. This study aimed to analyze the procedures for estimation of chronological age by dental evaluation conducted in IML of Fortaleza, based on procedures and methods for estimating the chronological age as described in literature. A literature review was performed and it has demonstrated that the estimation of chronological age has different nuances, it has been studied for a long time, and there are methods with accurate results that are required in many policy and judicial court processes. The most important information for age determination by examination of permanent teeth is distributed in their evolution stages: mineralization, dental eruption and dental late alterations. The technical term DENTITION has a dynamic sense, since it defines several stages from the thickening of the epithelium of the basal layer to the dental loss. DENTURE is static, as it defines only a phase of life of the individual: it is all the teeth at that time. The development of dental radiology has introduced new methods for estimating age, which increased the age determination accuracy. The oral examination is the only method currently used to age determination in the IML - Fortaleza. This study concluded that the oral examination procedures need to be complemented by radiological examinations that show reliable results and accurate age determination.

A motivação está fortemente ligada à qualidade do envolvimento do aluno com os estudos. Por esse motivo, ela vem sendo estudada nos vários níveis educacionais, desde o ensino infantil até o ensino superior. Uma das teorias que fundamenta os estudos em motivação é a Teoria da Autodeterminação, que define que o indivíduo pode transitar pela chamada linha do continuum, que é dividida em motivação intrínseca, motivação extrínseca e desmotivação. O presente trabalho buscou retratar o perfil motivacional de alunos dos cursos de graduação de Física e realizar uma análise segmentada por curso, ano de ingresso e sexo, assim como investigar a existência de alguma relação destes perfis com as variáveis desempenho acadêmico e perfil socioeconômico. A pesquisa foi realizada com 373 alunos regularmente matriculados nos cursos do Instituto de Física de São Carlos da Universidade de São Paulo. Os dados foram obtidos utilizando a Escala de Motivação Acadêmica (EMA). Além disso, os participantes também responderam a um questionário socioeconômico, e o desempenho acadêmico foi determinado pela média ponderada dos participantes no semestre de participação no estudo. A análise dos dados incluiu uma avaliação das propriedades psicométricas da EMA, a determinação dos perfis motivacionais e socioeconômico dos participantes e análises de correlação entre as variáveis de interesse. O perfil motivacional dos alunos avaliados se revelou predominantemente autônomo, sendo baixo o nível de desmotivação. Ao segmentarmos a análise, o perfil dos diferentes cursos similar, com predominância da motivação intrínseca por conhecimento, com pequena ressalva para o curso de Licenciatura em Ciências Exatas, que apresentou um perfil menos autônomo, com predominância da motivação extrínseca por identificação. Além disso, o sexo masculino apresentou um perfil ligeiramente mais autônomo quando comparado ao sexo feminino, similar ao apresentado pelos alunos ingressantes, quando comparados aos veteranos. Não foi encontrada correlação significativa entre o perfil motivacional e as variáveis de desempenho acadêmico e perfil socioeconômico. Em ambos os casos, nossa amostra apresenta nuances que demandam uma interpretação cuidadosa com relação a esses resultados. Dessa maneira, nossos dados contribuem não apenas para uma melhor caracterização do perfil motivacional no ensino superior em geral, mas particularmente na área de exatas, onde os dados ainda são escassos e onde se enfrenta uma série de problemas que podem estar associados à motivação dos alunos, como a alta evasão, por exemplo. / Motivation is strongly linked to the quality of the student´s involvement with the studies. For this reason, it has been studied at various levels of education, from kindergarten to higher education. One of the theories underlying motivational studies is the Self-Determination Theory, which defines that the individual can transit through the continuum line, which is divided into intrinsic motivation, extrinsic motivation, and amotivation. The present work aimed to determine the motivational profile of undergraduate physics students and to perform a segmented analysis by course, year of admission and sex, as well as to investigate the existence of correlation between these profiles and academic performance or socioeconomic profile. The research was carried out with 373 students regularly enrolled in the courses offered by São Carlos Institute of Physics of the University of São Paulo. Data were obtained using the Academic Motivation Scale (EMA). In addition, participants also responded to a socioeconomic questionnaire, and academic performance was determined by the weighted average of the participants in the semester participating in the study. Data analysis included an evaluation of the psychometric properties of the EMA, the determination of the participants´ motivational and socioeconomic profiles, and correlation analyzes between the variables of interest. The motivational profile of the students was predominantly autonomous, and the level of motivation was low. When segmenting the analysis, the profile of the different courses was similar, with predominance of the intrinsic motivation for knowledge, except for the course of Licenciatura in Ciências Exatas, that presented a less autonomous profile, with predominance of the extrinsic motivation by identification. In addition, males presented a slightly more autonomous profile when compared to females, like that presented by university juniors when compared to seniors. There was no significant correlation between the motivational profile academic performance or socioeconomic profile. In both cases, our sample presents nuances that demand a careful interpretation of these results. Thus, our data contribute not only to a better characterization of the motivational profile in higher education in general, but particularly in science courses, where data is still scarce and a series of problems that may be associated to students´ motivation, such as high evasion, for instance, is present.

This ethnographic dissertation examines contemporary perceptions of higher education within the context of a Tribal government. The purpose of this dissertation is to understand how Tribal community members perceive higher education as related to Tribal self-determination. This project was partially modeled around two specific research questions relating to Brayboy’s (2012) model of self-determination. Specific research questions for this dissertation included: (1) What are the perceptions of education in a Tribal community as they relate to sovereignty, nation building, and self-determination? (2) Are there differences among perceptions of education between groups (e.g., traditionalists v. credentialists)? In addition to addressing the specific research questions, this project also included a modified grounded theory to foster emergent theme development. Emergent theme development was intended to account for narratives beyond specific research questions. Participants were presented the following questions in one-on-one, open-ended interviews organized around the following questions: (1) How is formal education important for Tribal members? (2) How is formal education important to Tribal community development? (3) What formal educational credentials are most important to the operations of the Tribe? (4) What do you think formal educational credentials represent? (5) What tensions exist between a formal education v. cultural knowledge? (6) What do you think should be the ideal process of Tribal higher education? (7) How well do you think the current educational policies and practices of the Tribe complement self-determination? (8) What are the goals of a self-determination education? Results for this project were mixed. Narratives indicated a relative absence of conceptual constructs associated with Brayboy’s model of self-determination. Additionally, narratives also did not indicate a robust example of group dynamic. Results appeared to indicate an underlying presence of epistemological standpoints to frame Tribal higher education in terms of: (1) Formal Credentials; (2) Practical Experience; and (3) Cultural Experience. Finally, emergent theme development established how educational credentials are promoted, valued, and employed within the Tribal government setting. Narratives produced an extremely nuanced and dynamic landscape of perceptions, groups, utilities, tensions, obstacles, and reforms within Tribes. Narratives also indicated the presence of educational credentialism affecting self-determination in Tribal communities.

Gu, Wenbo. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references. / Abstract also in Chinese. / Acknowledgment --- p.i / Abstract --- p.ii / 摘要 --- p.iii / List of Figures --- p.vi / List of Tables --- p.vii / List of Abbreviations --- p.viii / Contents --- p.ix / Chapter 1. --- Introduction --- p.1 / Chapter 1.1. --- Arterial blood pressure and its importance --- p.1 / Chapter 1.2. --- Current methods for non-invasive blood pressure measurement --- p.4 / Chapter 1.2.1. --- The auscultatory method (mercury sphygmomanometer) --- p.4 / Chapter 1.2.2. --- The oscillometric method --- p.5 / Chapter 1.2.3. --- The tonometric method --- p.7 / Chapter 1.2.4. --- The volume-clamp method --- p.7 / Chapter 1.3. --- Blood pressure estimation based on pulse arrival time --- p.8 / Chapter 1.4. --- Objectives and structures of this thesis --- p.10 / Chapter 2. --- Hemodynamic models: relationship between PAT and BP --- p.14 / Chapter 2.1. --- The generation of arterial pulsation --- p.14 / Chapter 2.2. --- Pulse wave velocity along the arterial wall --- p.15 / Chapter 2.2.1. --- Moens-Korteweg equation --- p.15 / Chapter 2.2.2. --- Bergel wave velocity --- p.18 / Chapter 2.3. --- Relationship between PWV and BP --- p.19 / Chapter 2.3.1. --- Bramwell-Hill´ةs model --- p.20 / Chapter 2.3.2. --- Volume-pressure relationship --- p.20 / Chapter 2.3.3. --- Hughes' model --- p.22 / Chapter 2.4. --- The theoretical expression of PAT-BP relationship --- p.23 / Chapter 3. --- Estimation and calibration of arterial BP based on PAT --- p.25 / Chapter 3.1. --- PAT measurement --- p.25 / Chapter 3.1.1. --- Principle of ECG measurement --- p.25 / Chapter 3.1.2. --- Principle of PPG measurement --- p.26 / Chapter 3.1.3. --- Calculation of PAT --- p.28 / Chapter 3.2. --- Calibration methods for PAT-BP estimation --- p.29 / Chapter 3.2.1. --- Calibration based on cuff BP readings --- p.30 / Chapter 3.2.2. --- Calibration by hydrostatic pressure changes --- p.31 / Chapter 3.2.3. --- Calibration by multiple regression --- p.33 / Chapter 3.3. --- Model-based calibration with PPG waveform parameters --- p.34 / Chapter 3.3.1. --- Model-based equation with parameters from PPG waveform --- p.34 / Chapter 3.3.2. --- Selection of parameters from PPG waveform --- p.36 / Chapter 4. --- Cuffless calibration approach using PPG waveform parameter for PAT-BP estimation --- p.43 / Chapter 4.1. --- Introduction --- p.43 / Chapter 4.2. --- Experiment I: young group in sitting position including rest and after exercise states --- p.43 / Chapter 4.2.1. --- Experiment protocol --- p.43 / Chapter 4.2.2. --- Data Analysis --- p.44 / Chapter 4.2.3. --- Experiment results --- p.46 / Chapter 4.3. --- Experiment II: over-month observation using wearable device in sitting position --- p.48 / Chapter 4.3.1. --- Body sensor network for blood pressure estimation --- p.49 / Chapter 4.3.2. --- Experiment protocol and data collection --- p.50 / Chapter 4.3.3. --- Experiment results --- p.50 / Chapter 4.4. --- Experiment III: contactless monitoring in supine position --- p.51 / Chapter 4.4.1. --- The design of the contactless system --- p.52 / Chapter 4.4.2. --- Experiment protocol and data collection --- p.53 / Chapter 4.4.3. --- Experiment results --- p.53 / Chapter 4.5. --- Discussion --- p.55 / Chapter 4.5.1. --- Discussion of Experiments I and II --- p.55 / Chapter 4.5.2. --- Discussion of Experiments II and III --- p.57 / Chapter 4.5.3. --- Conclusion --- p.58 / Chapter 5. --- Cuff-based calibration approach for BP estimation in supine position --- p.61 / Chapter 5.1. --- Introduction --- p.61 / Chapter 5.2. --- Experiment protocol --- p.61 / Chapter 5.2.1. --- Experiment IV: exercise experiment in supine position in lab --- p.61 / Chapter 5.2.2. --- Experiment V: exercise experiment in supine position in PWH --- p.63 / Chapter 5.3. --- Data analysis --- p.65 / Chapter 5.3.1. --- Partition of signal trials and selection of datasets --- p.65 / Chapter 5.3.2. --- PPG waveform processing --- p.66 / Chapter 5.4. --- Experiment results --- p.68 / Chapter 5.4.1. --- Range and variation of reference SBP --- p.68 / Chapter 5.4.2. --- PAT-BP individual best regression --- p.69 / Chapter 5.4.3. --- Multiple regression using ZX and arm length --- p.72 / Chapter 5.4.4. --- One-cuff calibration improved by PPG waveform parameter --- p.72 / Chapter 5.5. --- Discussion --- p.74 / Chapter 6. --- Conclusion --- p.76

Yan, Renfei. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references (leaves 69-77). / Abstract also in Chinese. / ABSTRACT --- p.I / ACKNOWLEDGEMENT --- p.V / LIST OF FIGURES --- p.VI / LIST OF TABLES --- p.VIII / LIST OF ABBREVIATIONS --- p.IX / Chapter CHAPTER 1. --- INTRODUCTION TO BLOOD PRESSURE MEASURING DEVICES AND EVALUATION STANDARDS --- p.1 / Chapter 1.1. --- Current situation on hypertension --- p.1 / Chapter A. --- Prevalence of hypertension --- p.1 / Chapter B. --- Low awareness of hypertension --- p.1 / Chapter 1.2. --- Calls for better management of hypertension --- p.2 / Chapter 1.3. --- Blood pressure measuring devices --- p.3 / Chapter A. --- Conventional devices and their limitations --- p.3 / Chapter B. --- Wearable cuff-less devices --- p.4 / Chapter 1.4. --- Evaluation of the wearable cuff-less devices --- p.6 / Chapter 1.5. --- Objectives of the thesis --- p.7 / Chapter 1.6. --- Structure of the thesis --- p.7 / Chapter CHAPTER 2. --- REVIEW ON CURRENT STANDARDS --- p.8 / Chapter 2.1. --- Introduction to current standards --- p.8 / Chapter A. --- AAMI standard --- p.8 / Chapter B. --- BHS protocol --- p.8 / Chapter C. --- ESH protocol --- p.9 / Chapter 2.2. --- Comparison of current standards --- p.9 / Chapter A. --- Evaluation scope --- p.9 / Chapter B. --- Validation protocol --- p.10 / Chapter C. --- Accuracy criteria --- p.10 / Chapter D. --- Testing reference --- p.13 / Chapter E. --- Recruitment of subjects --- p.13 / Chapter F. --- Ambulatory monitors --- p.14 / Chapter G. --- Special groups of population --- p.15 / Chapter H. --- Statistical considerations --- p.16 / Chapter 2.3. --- Major challenges for the evaluation of cuff-less devices --- p.17 / Chapter A. --- Lack of experimental data --- p.19 / Chapter B. --- Re-examination of the statistical considerations --- p.19 / Chapter C. --- Feature oriented design of the validation protocol --- p.19 / Chapter D. --- Selection of testing reference --- p.79 / Chapter CHAPTER 3. --- ERROR DISTRIBUTION MODEL --- p.21 / Chapter 3.1. --- Distribution assumption in current standards --- p.21 / Chapter 3.2. --- Distribution analysis from published reports --- p.22 / Chapter A. --- Methodology --- p.22 / Chapter B. --- Data analysis --- p.23 / Chapter C. --- Results --- p.23 / Chapter 3.3. --- Distribution analysis on a cuff-less device --- p.29 / Chapter A. --- Experiment --- p.29 / Chapter B. --- Data analysis --- p.31 / Chapter C. --- Results --- p.31 / Chapter 3.4. --- Discussion --- p.33 / Chapter A. --- Supporting evidence for t4 distribution --- p.33 / Chapter B. --- Implications for the application of t4 distribution --- p.34 / Chapter 3.5. --- Section Summary --- p.35 / Chapter CHAPTER 4. --- EVALUATION SCALE TO ASSESS THE ACCURACY --- p.36 / Chapter 4.1. --- Considerations for parameter selection --- p.37 / Chapter A. --- Outlying errors and system bias --- p.37 / Chapter B. --- Accuracy at different levels of blood pressure --- p.37 / Chapter 4.2. --- Description of selected parameters --- p.38 / Chapter 4.3. --- Theoretical relationship between “new´ح and “old´ح parameters --- p.38 / Chapter A. --- Mathematical relationship --- p.39 / Chapter B. --- Mapping relationship --- p.40 / Chapter 4.4. --- Assessment of accuracy at increasing blood pressure levels --- p.41 / Chapter A. --- Data transformation --- p.41 / Chapter B. --- Experimental study --- p.41 / Chapter 4.5. --- Discussion and application --- p.43 / Chapter A. --- Parameter selection --- p.43 / Chapter B. --- Sample size --- p.45 / Chapter C. --- Accuracy criteria --- p.46 / Chapter 4.6. --- Section summary --- p.47 / Chapter CHAPTER 5. --- FEATURE ORIENTED PROTOCOL DESIGN --- p.48 / Chapter 5.1. --- Rationale of accuracy assessment with BP change --- p.48 / Chapter 5.2. --- Experiment one --- p.49 / Chapter 5.3. --- Experiment two --- p.49 / Chapter 5.4. --- Data analysis --- p.49 / Chapter 5.5. --- Results --- p.50 / Chapter A. --- Experiment one --- p.50 / Chapter B. --- Experiment two --- p.52 / Chapter 5.6. --- Discussion --- p.58 / Chapter A. --- Difference between cuff-less and cuff-based devices --- p.58 / Chapter B. --- Correlation between accuracy and blood pressure changes --- p.58 / Chapter C. --- Inducement of blood pressure change --- p.59 / Chapter D. --- Other factors affect the accuracy --- p.60 / Chapter 5.7. --- Section summary --- p.61 / Chapter CHAPTER 6. --- PROPOSAL FOR THE EVALUATION OF WEARABLE CUFF-LESS DEVICES --- p.62 / Chapter 6.1. --- Scope --- p.62 / Chapter 6.2. --- Purpose --- p.62 / Chapter 6.3. --- Subject selection --- p.63 / Chapter 6.4. --- Main validation --- p.64 / Chapter A. --- Static test --- p.64 / Chapter B. --- Test with blood pressure change --- p.65 / Chapter C. --- Test after a certain period of time --- p.65 / Chapter 6.5. --- Data analysis and reporting --- p.66 / Chapter A. --- Statistical report --- p.66 / Chapter B. --- Graphical representation --- p.67 / Chapter 6.6. --- Conclusion and future work --- p.67 / REFERENCES --- p.69 / LIST OF PUBLICATIONS AND AWARDS --- p.78

The kinetics of the oxidation of [Fe(CN)6]-4 by K[Co(HEDTA)NO2] was studied in order to get the mechanism and the activation parameters of the reaction. Using a freshly-made Na3PO4 solution as the reaction medium with a pH of 6.00 the ionic strength was maintained at 0.10 M and the buffer molarity was 0.001 M. The rate constant (kobs) of the reaction between [Fe(CN)6]-4 and K[Co(HEDTA)NO2] was determined at temperatures of 25.0°C, 27.5°C, 30.0°C, 35.0°, and 40.0°C. We explored this reaction by monitoring the evolution of ferricyanide, [Fe(CN)6]-3, spectroscopically for which ε420 = 1023 cm-1 M-1 by recording the absorbance as a function of time at 420 nm wavelength. The data were plotted and results analyzed to give activation parameters, energy of activation (Ea), entropy of activation (ΔS‡), and enthalpy of activation (ΔH‡) for the two reacting complexes under the specified reaction conditions. Based on previous results, an outer-sphere electron-transfer pathway and a first order rate of reaction for each of the reacting species 1 have been proposed.

This thesis demonstrates that any individual can provide relevant observational data to further research efforts within the Aerospace community, through the use of amateur telescopes. A Meade LX200 12 in. telescope and Lumenera Skynyx 2.0 camera were utilized to observe small LEO satellites, using a well-documented point-and-wait staring method. Over a period of three months, a total of 186 observation attempts were made resulting in 97 successful captures. From the gathered data, three possible aerospace applications were analyzed: validation of a satellite brightness prediction model, angles-only orbit determination including extended Kalman filtering, and temporal error growth in TLE-based orbit propagation. Further investigations include a preliminary optimization using MATLAB's fmincon function (informed by the previous analyses) to determine an optimal telescope size for performing LEO observations.

Adult online gaming is a fast-growing global entertainment industry, and many gamers spend more time playing games and less time engaging in work or other activities, which negatively affects their lives and relationships. This quantitative study addressed how psychological needs and gaming motivation predicted gaming behavior, life satisfaction, and relationship satisfaction using a mediational model. The theoretical foundation was self-determination theory, which addresses how personal choices are influenced by internal factors, especially psychological needs and motivation. An online survey was used to collect self-reported data from a convenience sample of 935 adult gaming participants using the Basic Needs Satisfaction in General Scale, the Gaming Motivation Scale, the Satisfaction with Life Scale, the Relationship Assessment Scale, and a short demographic questionnaire. Results of multiple regression analyses indicated gaming motivation was a significant mediator of life satisfaction and relationship satisfaction. However, gaming motivation was not a significant mediator of gaming behavior. Findings of this study indicate that for online gamers, quality of life (life satisfaction and relationship satisfaction) is enhanced when gaming motivation is high, suggesting that joy of gaming can positively influence other aspects of life, when psychological needs (autonomy, competence, and relatedness) are positive as well.

Students with disabilities often have difficulties transitioning from high school to employment. Many students lack the self-determination skills needed to make this transition. Self-determination involves students implementing strategies that enable them to modify and regulate their own behavior; and utilizing strategies that support them to track progress toward goals. The research literature has shown that self-determination instruction can facilitate positive transition outcomes. Collaboration between districts and outside agencies has also been shown to improve transition outcomes, according to existing research. This study examines the effects of self-determination training, taught by Vocational Rehabilitation counselors, on self-determination skills of students with disabilities. Participants included 11 students, ages 15-18, who have been identified as having a specific learning disability, intellectual disability, other health impairment, or autism. The target behavior will be increased self-determination scores on two instruments: a formal rating scale and curriculum-based assessment. The effects of the lessons will be measured by the AIR Self-Determination Scale and a Curriculum Based Assessment. Ten lessons were taught by a Vocational Rehabilitation Counselor. The researcher found that student self-determination scores did not substantially increase after receiving “Job Club” instruction taught by the Vocational Rehabilitation Counselor, but that participants showed an increased knowledge surrounding disability disclosure in the workplace and increased self-determination scores in the area of self-monitoring of progress towards a goal. The research also showed that participants who had been previously or were currently employed showed greater progress on a curriculum based assessment than those with no employment history.

In soil survey work the method now generally used to evaluate the carbonate content of the soil in the field is to observe the amount of effervescence that takes place when the soil reacts with dilute acid. The four degrees of effervescence usually recognized are designated by the symbols eo, e, es, ev and correspond roughly to a lime content of 0-0.5, 0.5-3, 3-15, and above 15 per cent, respectively. This, or course, is a very rough estimate and therefore a method is needed for the quantitative determination of carbonates in the field with a fair degree of accuracy. If such a method were available it would be possible for the soil surveyor to follow accurately in the field the distribution of lime down the profile. It would also make possible the detection of lime "bulges," a consideration of primary importance in soil classification. The method would also be useful to agricultural advisers, especially in connection with the problem of lime induced chlorosis. There is a large variety of methods for the determination of soil carbonate in the laboratory with varying degrees of accuracy but none of them is very suitable for field use as they either employ complicated apparatus, or in other ways require laboratory facilities. The present study is concerned with the development and evaluation of a rapid method for the determination of soil carbonate in the field. The apparatus used is very simple and easy to carry and to handle under field conditions. The results obtained are sufficiently accurate for the purpose intended; Their accuracy being above that of the semiquantitative effervescence test. The proposed method is now rendered particularly useful by the availability on the market of small portable kits for the determination of soil moisture in the field which permit the expression of results on a dry basis.