MII publikatsioonid
Selle valdkonna püsiv URIhttp://hdl.handle.net/10492/7078
Sirvi
Sirvi MII publikatsioonid Kuupäev järgi
Nüüd näidatakse 1 - 20 234
Tulemused lehekülje kohta
Sorteerimisvalikud
Kirje Cудьба тиcca въ Прибалтийскихъ губернияхъ(1911) Mölder, KristjanKirje Puude ja põõsaste määraja lehtede järele(1921) Mathiesen, Andres (koostaja); Werberg, Karl (koostaja)SisukordKirje Puude ja põõsaste määraja : pungade, ja puu anatoomiliste- ja wälis-tundemärkide järele(1922) Mathisen, Andres (koostaja); Weerberg, Karl (koostaja)Väljaande tekstis sisaldub 66 joonistust.Kirje Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike plaanid (kvartalid nr 200-293)(1922) Jõgi, O.; Kapsta, H.; Kuuse, Joh.; Nogur, Rud.; Rebane, Hans; Roots, Aleks.; Soodla, E.; Ernits, El.; Mutt, V.; Kaalep, J.; Martna, T.; Liugand, J.; Rosnikov, L.; Assor, E.; Riedel, E.; Koern, T.; Mangelson, K.; Valk, Henny; Valdmann, E.; Paris, K.; Järv, J.; Jõgi, Elmar; Saar, E.J.; Riisberg, R.; Mesi, A.; Pill, Hugo; Puurmann, O.; Lõoke, Victor; Pajo, Edmund; Puksow, L.; Soplepmann, O.; Pung, J.; Ant, E.; UustaloTartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike takseerkirjeldused aastatest 1922, 1923. Kvartalite nr 200-293 käsikirjalised originaalplaanid on mõõtkavas 1:2500. Koloreeritud plaanid sisaldavad kvartalite numbreid, leppemärkide seletusi, ilmakaari, graafilist mõõtkava, autorite nimesid. Autorite nimedes võib esineda eksimusi. Loetamatud nimed puuduvad autorite loendis.Kirje Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike plaanid (kvartalid nr 101-199)(1922) Soplepmann, O.; Pung, J.; Pajo, Edmund; Puksow, L.; Lõoke, Victor; Palmberg; Rebane, Hans; Roots, Aleks.; Haug; Nogur, Rud.; Kuuse, Joh.; Einberg, Joh.; Mutt, V.; Kaalep, J.; Soodla, E.; Ernits, El.; Valk, Henny; Waldmann, E.; Maasik, Ed.; Paris, K.; Jõgi, Oswald; Kapsta, H.; Apfelbaum, E.; Assor, E.; Riedel, E.; Rosnikov, L.; Jõgi, Elmar; Saar, E.J.; Järv, J.; Pääsuke, A.; Assor, E.; Riedel, E.; Riisberg, Rich.; Palmberg; Meiu, Joh.; Martna, T.; Lugenberg, F.; Konrad, A.; Kikas, J.; Jaanson, J.; Loskit; Naha, V.Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike takseerkirjeldused aastatest 1922, 1923, 1924. Kvartalite nr 101-199 käsikirjalised originaalplaanid on mõõtkavas 1:2500. Koloreeritud plaanid sisaldavad kvartalite numbreid, leppemärkide seletusi, ilmakaari, graafilist mõõtkava, autorite nimesid. Autorite nimedes võib esineda eksimusi. Loetamatud nimed puuduvad autorite loendis.Kirje Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike plaanid (kvartalid nr 79-155)(1922) Tartu ÜlikoolTartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike takseerkirjeldused aastast 1922. Kvartalite nr 79-155 käsikirjalised originaalplaanid on mõõtkavas 1:2500. Koloreeritud plaanid sisaldavad kvartalite numbreid, leppemärkide seletusi, ilmakaari, graafilist mõõtkava.Kirje Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike plaanid (kvartalid nr 229-293)(1922) Tartu ÜlikoolTartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike takseerkirjeldused aastast 1922. Kvartalite nr 229-293 käsikirjalised originaalplaanid on mõõtkavas 1:2500. Koloreeritud plaanid sisaldavad kvartalite numbreid, leppemärkide seletusi, ilmakaari, graafilist mõõtkava.Kirje Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike plaanid (kvartalid nr 1-100)(1922) Järv, J.; Jõgi, E.; Soplepmann, O.; Pung, J.; Mutt, V.; Kaalep, J.; Kunnus, P.; Ant, E.; Riedel, E.; Vaher, Aug.; Jõgi, Oswald; Kapsta, H.; Lõoke, Victor; Luik, J.; Valk, Henny; Waldmann, E.; Ernits, Eduard; Kuuse, Joh.; Nogur, Rud.; Rebane, Hans; Roots, Aleks.; Koljo, R.; Pajo, Edmund; Puksow, L.; Puurmann, O.; Soodla, E.; Teder; Zernask, Oskar; Maaser, V.; Maasik, Ed.; Eichorn; Assor, E.; Riisberg, R.; Indermitte, O.; Walner, Joh.; Vorkampff-Laur, E.; Martna, T.; Rikas, J.; Saar, E.J.; Riisberg, Rich.; Naha, V.; Meiu, Joh.; Pikkat, K.Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike takseerkirjeldused aastatest 1922, 1923, 1924, 1927. Kvartalite nr 1-100 käsikirjalised originaalplaanid on mõõtkavas 1:2500. Koloreeritud plaanid sisaldavad kvartalite numbreid, leppemärkide seletusi, ilmakaari, graafilist mõõtkava, autorite nimesid. Autorite nimedes võib esineda eksimusi. Loetamatud nimed puuduvad autorite loendis.Kirje Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike plaanid (kvartalid nr 1-160)(1930) Ernits, A.; Krigul, T.; Küttis, Nikolai; Vassiljev, M.; Aljajaan, A.; Selberg, Joh.; Lorentsen, B.; Hüsse. J.U.; Hüsse, O.; Mats, Joh.; Suuroja, Alex.; Hendrikson, Ants; Püll, A.; Peterson, H.; Peeterbras; Lainewool, J.; Juurik, L.; Sulg, J.; Hansen, A.; Tamm, A.; Karu, A.; Muiste, L.; Schabak, Th.; Sõna, K.; Hint, E.; Soots, E.; Kremser, W.; Leiste, Karl; Wannary, K.; Rosimannus, Edg.; Mihkelson, R.; Mädesson, J.; Linde, O.; Konstantjuk, V.; Lunden, R.Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike takseerkirjeldused aastatest 1930, 1931, 1932, 1935, 1937, 1943, 1945. Kvartalite nr 1-160 käsikirjalised originaalplaanid on mõõtkavas 1:2000, 1:2500, 1:4000. Koloreeritud plaanid sisaldavad kvartalite numbreid, leppemärkide seletusi, ilmakaari, graafilist mõõtkava, autorite nimesid. Autorite nimedes võib esineda eksimusi. Loetamatud nimed puuduvad autorite loendis.Kirje Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike plaanid (kvartalid nr 161-292)(1931) Jakon, Herman; Kremser, W.; Schabak, Th.; Ernits, A.; Krigul, T.; Wannary, K.; Suuroja, Alex.; Tiks, J.; Kauberg, B.; Hint, O.; Lunden, R.; Hansen, A.; Karu, A.; Tamm, A.; Ritsland, Valter; Ivanov, Mihail; Küttis, Nikolai; Altosaar, N.; Sõna, K.; Kolt, Mart; Paggi, Helmut; Embaum, L.; Lunden, Osv.; Reinbaum, S.Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike takseerkirjeldused aastatest 1931, 1932. Kvartalite nr 161-292 käsikirjalised originaalplaanid on mõõtkavas 1:2500. Koloreeritud plaanid sisaldavad kvartalite numbreid, leppemärkide seletusi, ilmakaari, graafilist mõõtkava, autorite nimesid. Autorite nimedes võib esineda eksimusi. Loetamatud nimed puuduvad autorite loendis.Kirje Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike plaanid (kvartal nr 261)(1935) Ernits, Ed.Tartu Ülikooli Õppe- ja Katsemetskonna Kastre Peravalla metsandike takseerkirjeldused aastast 1935. Kvartali nr 261 käsikirjalised originaalplaanid on mõõtkavas 1:4000 ja 1:20000. Koloreeritud plaanid sisaldavad kvartali numbrit, leppemärkide seletusi, ilmakaari, graafilist mõõtkava, autori nime.Kirje Thermoelastic Stresses in Multilayered Plates Under Variable Heating in the Direction of Thickness :[full text in Russian](Eesti Põllumajanduse Akadeemia, 1959) Kõo, JakubThermoelastic equilibrium of multilayer isotropic plates (Fig. 1) Under variable heating in the thickness direction in considered. Proceedings from the well-known Kirchoff’s hypotheses, it is demonstrated that in the case of small deflections the solution of probleme is reduced to integration of differential equations (30) and to satisfy the boundary conditions for functions φ (stress function) and w (deflection function) where D’ designate reduced bending stiffness of a multilayered plate. Of the special cases for a plate with an arbitrary contour, the following fixing conditions are considered: 1) fixed edges (Fig. 3), 2) slipping edges (Fig. 4), 3) free edges. It is shown that for a plate with fixed or slipping edges w=0, but for a free plate w = 0,5K (x²+y²), i.e. a free plate is bent to spherical surface (K is a constant). Formulae (46), (47) and (57)-(60) may be readily adapted to calculate eigenstresses (residuals stresses) in galvanic coatings by the experimentally measured curvature at unilateral coating of a plate cathode.Kirje Calculation of Eigenstresses in Electrodeposits by Deformation of a Thin Plate Cathode :[full text in Russian](Eesti Põllumajanduse Akadeemia, 1959) Kõo, JakubDraw on the analogy between a libre thermal strain in a elastic body and a libre eigenstrain in a electrodeposit, for calculation of eigenstress (residual stress) in the superficial layer of a galvanic coating, formula (4) is obtained, where En, µ and β are the modulus of elasticity for coating, Poisson´s ratio (identical for coating and substrate) and free linear eigenstrain in the coating superficial layer. I addition eigenstrain β is calculated from the experimentally determined curvature of the substrate. The correspondind calculation formulae are presented for a plate substrate with free edges (Fig. 1a): formula (8), for slipping edges (Fig.1b): formula (36) and for fixed edges (Fig.1v): formula (38). Substitution these formulae in formula (4) yields the corresponding formulae of Stoney [2] an Brenner-Senderoff [3] complemented by factor 1/(1-µ) which modifies the formulae under consideration through taking account of the biaxial state of stress in a coated plate cathode.Kirje Calculation of residual stresses in electrodeposited circular cylindres : [full text in Russian](Ленинградский сельскохозяйственный институт, 1961) Kõo, JakubThe axially symmetric problem of thermoelasticity for a circular multilayer cylinder is solved. Using this solution and basing on the analogy between libre thermal strain in an elastic body and libre eigenstrain in a galvanic coating, the problem of determination of residual stresses (eigenstresses) in a circular cylinder with a galvanic coating is solved. The compatibility problems of the solution are considered. As an example, the residual stress distributions, calculated by using equations (30) for a hollow cylindrical substrate with a coating, are presented in Fig.3.Kirje Calculation of residual stresses in electrodeposited spheres : [full text in Russian](Сельхозиздат, 1962) Kõo, JakubThe polar-symmetric problem of thermoelasticity for a multilayer sphere is solved. Using this solution and based on the analogy between a libre thermal strain in an elastic body and a libre eigenstrain in a galvanic coating, the problem of determination of residual stresses (eigenstresses) in a multilayer galvanically grown sphere is solved. The compatibility problem of the solution is considered. As an example, residual stresses are determined for a coating on a thin-walled spherical substrate (application of equations (38) and (51) which modify the Mills method [7]).Kirje Determination of eigenstresses in electrodeposits by deformation of a thin-walled tube cathode: [full text in Russian](Eesti Põllumajanduse Akadeemia, 1963) Kõo, JakubA new technique for experimental determination of initial stress was developed. According to this, a coating to be investigated will be applied on the external surface of a thin-walled tubular cathode (see Figs. 2, 3). In addition, by using of electrical-resistance strain gauges on the internal surface of the cathode, strains are measured as a function of variable coating thickness. Initial stress is determined via approximation of experimental information. As an example in Fig.4 the distributions of measured deformations and initial and eigen- stresses (residual stresses) for a galvanic steel coating of a thin-walled tubular cathode are presented.Kirje Eigenstresses in thin electrodeposits: [full text in Russian](Eesti Põllumajanduse Akadeemia, 1963) Kõo, JakubThe eigenstress (residual stress) state of a thin superficial layer of an electrodeposit is considered. The analysis is based on Ilyushin´s theory of plasticity. It is established that the state of stress in the superficial layer is equal biaxial compression or tension defined for the elastic state according to formula (9), for initial stress, where E, µ and β are the modulus of elasticity, Poisson´s ratio and initial strain for the coating, respectively. At β>0 there occurs biaxial compression, at β<0 there occurs biaxial tension. It is shown that eigenstresses (residual stresses) in the thick deposit are expressed as the sum of initial stress and additional stress.Kirje Determination of Eigenstresses in Machine Elements Restored by Galvanic Coatings : [Dissertation for the degree of Candidate of Engineering Sciences : full text in Russian](Ленинградский сельскохозяйственный институт, 1965) Kõo, Jakub; Gutman, S. (juhendaja)Autoreferat of the thesis is available http://hdl.handle.net/10492/8534Kirje Determination of Eigenstresses in Machine Elements Restored by Galvanic Coatings : [Autoreferat for the degree of Candidate of Engineering Sciences : full text in Russian](Leningrad Agricultural Institute, 1965) Kõo, JakubExtended summary of thesis for the degree of Candidate of Engineering Sciences): [full text in Russian]. This thesis of J. P. Kõo (Supervisor: Professor, Doctor of Engineering Sciences S. G. Gutman) for the degree of Candidate of Engineering Sciences is completed at Leningrad Agricultural Institute and at Estonian Agricultural Academy in 1957- 1965. The following research results are obtained: 1. A survey of the studies focusing on experimental techniques for determination of eigenstresses (henceforth residual stresses) in galvanic coatings is provided. 2. An algorithm for determination of residual stresses in machine elements restored by addition of galvanic coatings is proposed. 3. Presence of an equibiaxial state of residual stress in the superficial layer of a galvanic coating is established [8]. 4. A classification of galvanic coatings onto thin and thick coatings is offered. 5. Algorithms for calculation of residual stresses in plates coated at fixed, slipping or free edges are developed [5] (extension of the work of Stoney [2] and of Brenner and Senderoff [3). In particular, for a free plate substrate with unilateral coating for the deformation and the curvature measuring methods Stoney´s differential formulas are extended (see(Egs.(15)) and their integration is considered. 6. Problems related to determination of residual stresses in cylinders [6] and spheres [7] at application of galvanic coatings are solved. 7. Formulas for calculation of thermal stresses in galvanically covered plates, cylinders and spheres are established. 8. Techniques for determination of the initial stress (stress in the superficial layer) of a coating from deformation parameters measured at application of the coating are critically examied. 9. A new technique for experimental determination of initial stress is developed [9]. According to this, a coating to be investigated will be applied on the external surface of a thin-walled tubular cathode (see Fig.5). In addition, by using of electrical-resistance strain gauges on the internal surface of the cathode, strains are measured as a function of variable coating thickness (see Fig.6). Initial stress is determined (see Table 2) via approximation of experimental information by Eq.(19). 10. Examples of investigation of residual stresses for some details restored with the help of an iron galvanic coating are presented.Kirje Determination of residual stresses in bars and plates using the strain measurement method : [full text in Russian](МГТУ им. Н. Э. Баумана, 1969) Kõo, JakubAn integral approach is used for derivation of a metrological equation for the indicated measurement method . The equation (1) is Volterra´s first kind integral equation from which, by means of its reduction to the differential equation and integration, metrological equation (4) is obtained. Problems of measurement data processing are addressed. As an example, determination of residual stresses in the galvanic iron coating of a plate-like cathode is presented.