The Annual Report of the Board of Directors of the A. I. E. E. was presented at the Annual Business Meeting of the Institute held in New York, Friday afternoon, May 19, 1922.
{"title":"Board of directors' report","authors":"David A. Genova, Heather, McKillop","doi":"10.1190/tle38040313.1","DOIUrl":"https://doi.org/10.1190/tle38040313.1","url":null,"abstract":"The Annual Report of the Board of Directors of the A. I. E. E. was presented at the Annual Business Meeting of the Institute held in New York, Friday afternoon, May 19, 1922.","PeriodicalId":268640,"journal":{"name":"Journal of the American Institute of Electrical Engineers","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125933272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-13DOI: 10.1109/t-aiee.1921.5060744
J. B. Whitehead, F. W. Lee
The paper describes a series of experiments on the influence of temperature on corona-forming continuous potentials. The observations have been made on three sizes of wire of diameters 0.0251 cm., 0.0803 cm., and 0.0933 cm., and in each case at several values of temperature within the range 5 deg. cent and 70 deg. cent. At each temperature the pressure has been varied from a value in the neighborhood of that of the atmosphere downwards, reaching in the extreme cases the value 6.03 cm. of mercury. Within the range of values reached, as indicated above, the general form of the law of corona, as developed experimentally by a number of other observers, is found to be fulfilled. There are separate families of curves for positive and negative potentials as obtained by varying the pressure for each constant value of temperature. The observations show that under constant conditions as to pressure and temperature a higher value of negative potential than positive potential is required to form corona. As plotted graphically, the results seem to indicate that when larger wires are used corona appears at the same values of both positive and negative potential. The observations, however, have not been extended sufficiently to show this identity of value. This conclusion is at variance with the observations of a number of other experimenters, in particular those of W. S. Brown, who concludes that with larger values of diameter of wire negative corona may appear at lower values than positive corona. The experiments substantiate the empirical laws developed by Whitehead and Peek, although the constants of the equations involved are higher than any heretofore observed. There is some indications that at temperatures in the neighborhood of 70 deg. cent. a departure from the empirical laws mentioned may set in. To be presented at the Annual and Pacific Coast Convention of the A. I.E. E., Salt Lake City, June 21–24, 1921.
本文介绍了温度对电晕形成连续电位影响的一系列实验。在直径为0.0251厘米的三种尺寸的金属丝上进行了观察。0.0803 cm。0.0933 cm。在每一种情况下，在5摄氏度到70摄氏度的温度范围内的几个温度值下，压力从接近大气的压力向下变化，在极端情况下达到6.03厘米的值。的汞。在上述所达到的数值范围内，许多其他的观测者在实验中提出的日冕定律的一般形式是成立的。对于每一个恒定的温度值，通过改变压力而得到的正、负电位有不同的曲线族。观测结果表明，在一定的压力和温度条件下，形成电晕所需的负电势比正电势高。如图所示，结果似乎表明，当使用较大的导线时，电晕出现在正负电位相同的值。然而，这些观察还没有得到充分的扩展，以显示这种价值的同一性。这一结论与其他一些实验者的观察结果不同，特别是W. S. Brown的观察结果，他的结论是，当电线直径较大时，负电晕的值可能比正电晕的值低。这些实验证实了怀特黑德和皮克提出的经验法则，尽管所涉及的方程的常数比迄今为止观察到的任何方程都要高。有一些迹象表明，在70摄氏度左右的温度下，可能会出现与上述经验规律不同的情况。将于1921年6月21日至24日在盐湖城举行的a.e.e.年度及太平洋海岸大会上颁发。
{"title":"The electric strength of air under continuous potentials and as influenced by temperature","authors":"J. B. Whitehead, F. W. Lee","doi":"10.1109/t-aiee.1921.5060744","DOIUrl":"https://doi.org/10.1109/t-aiee.1921.5060744","url":null,"abstract":"The paper describes a series of experiments on the influence of temperature on corona-forming continuous potentials. The observations have been made on three sizes of wire of diameters 0.0251 cm., 0.0803 cm., and 0.0933 cm., and in each case at several values of temperature within the range 5 deg. cent and 70 deg. cent. At each temperature the pressure has been varied from a value in the neighborhood of that of the atmosphere downwards, reaching in the extreme cases the value 6.03 cm. of mercury. Within the range of values reached, as indicated above, the general form of the law of corona, as developed experimentally by a number of other observers, is found to be fulfilled. There are separate families of curves for positive and negative potentials as obtained by varying the pressure for each constant value of temperature. The observations show that under constant conditions as to pressure and temperature a higher value of negative potential than positive potential is required to form corona. As plotted graphically, the results seem to indicate that when larger wires are used corona appears at the same values of both positive and negative potential. The observations, however, have not been extended sufficiently to show this identity of value. This conclusion is at variance with the observations of a number of other experimenters, in particular those of W. S. Brown, who concludes that with larger values of diameter of wire negative corona may appear at lower values than positive corona. The experiments substantiate the empirical laws developed by Whitehead and Peek, although the constants of the equations involved are higher than any heretofore observed. There is some indications that at temperatures in the neighborhood of 70 deg. cent. a departure from the empirical laws mentioned may set in. To be presented at the Annual and Pacific Coast Convention of the A. I.E. E., Salt Lake City, June 21–24, 1921.","PeriodicalId":268640,"journal":{"name":"Journal of the American Institute of Electrical Engineers","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124144140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1969-07-01DOI: 10.1109/jaiee.1929.6535958
Bernard Otting has left the employ of the Cincinnati Ball Crank Company and is now with the Willy Wray Electric Company, Cincinnati, Ohio.
Bernard Otting已经离开了辛辛那提球曲柄公司的雇员，现在是威利雷电气公司，俄亥俄州辛辛那提。
{"title":"Personal mention","authors":"","doi":"10.1109/jaiee.1929.6535958","DOIUrl":"https://doi.org/10.1109/jaiee.1929.6535958","url":null,"abstract":"Bernard Otting has left the employ of the Cincinnati Ball Crank Company and is now with the Willy Wray Electric Company, Cincinnati, Ohio.","PeriodicalId":268640,"journal":{"name":"Journal of the American Institute of Electrical Engineers","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133376444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1932-06-17DOI: 10.1109/jaiee.1930.6535777
G. Bays
The library is a cooperative activity of the American Institute of Electrical Engineers, the American Society of Civil Engineers, the American Institute of Mining and Metallurgical Engineers and the American Society of Mechanical Engineers, It is administered for these Founder Societies by the United Engineering Society, as a public reference library of engineering and the allied sciences. It contains 150,000 volumes and pamphlets and receives currently most of the important periodicals in its field. It is housed in the Engineering Societies Building, 29 West Thirty-ninth St., New York. In order to place the resources of the Library at the disposal of those unable to visit it in person, the Library is prepared to furnish lists of references to engineering subjects, copies or translations of articles, and similar assistance. Charges sufficient to cover the cost of this work are made. The Director of the Library will gladly give information concerning charges for the various kinds of service to those interested. In asking for information, letters should be made as definite as possible, so that the investigator may understand clearly what is desired. The library is open from 9 a. m. to 10 p. m. on all week days except holidays throughout the year except during July and August when the hours are 9 a. m. to 6 p. m.
{"title":"Engineering societies library","authors":"G. Bays","doi":"10.1109/jaiee.1930.6535777","DOIUrl":"https://doi.org/10.1109/jaiee.1930.6535777","url":null,"abstract":"The library is a cooperative activity of the American Institute of Electrical Engineers, the American Society of Civil Engineers, the American Institute of Mining and Metallurgical Engineers and the American Society of Mechanical Engineers, It is administered for these Founder Societies by the United Engineering Society, as a public reference library of engineering and the allied sciences. It contains 150,000 volumes and pamphlets and receives currently most of the important periodicals in its field. It is housed in the Engineering Societies Building, 29 West Thirty-ninth St., New York. In order to place the resources of the Library at the disposal of those unable to visit it in person, the Library is prepared to furnish lists of references to engineering subjects, copies or translations of articles, and similar assistance. Charges sufficient to cover the cost of this work are made. The Director of the Library will gladly give information concerning charges for the various kinds of service to those interested. In asking for information, letters should be made as definite as possible, so that the investigator may understand clearly what is desired. The library is open from 9 a. m. to 10 p. m. on all week days except holidays throughout the year except during July and August when the hours are 9 a. m. to 6 p. m.","PeriodicalId":268640,"journal":{"name":"Journal of the American Institute of Electrical Engineers","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1932-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123244270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1932-06-17DOI: 10.1109/jaiee.1925.6534630
The library is a cooperative activity of the American Institute of Electrical Engineers, the American Society of Civil Engineers, the American Institute of Mining and Metallurgical Engineers and the American Society of Mechanical Engineers. It is administered for these Founder Societies by the United Engineering Society, as a public reference library of engineering and the allied sciences. It contains 150,000 volumes and pamphlets and receives currently most of the important periodicals in its field. It is housed in the Engineering Societies Building, 29 West Thirty-ninth St., New York. In order to place the resources of the Library at the disposal of those unable to visit it in person, the Library is prepared to furnish lists of references to engineering subjects, copies or translations of articles, and similar assistance. Charges sufficient to cover the cost of this work are made. The Director of the Library will gladly give information concerning charges for the various kinds of service to those interested. In asking for information, letters should be made as definite as possible, so that the investigator may understand clearly what is desired. The library is open from 9 a. m. to 10 p. m. on all week days except holidays throughout the year except during July and August when the hours are 9 a. m. to 6 p. m.
{"title":"Engineering societies library","authors":"","doi":"10.1109/jaiee.1925.6534630","DOIUrl":"https://doi.org/10.1109/jaiee.1925.6534630","url":null,"abstract":"The library is a cooperative activity of the American Institute of Electrical Engineers, the American Society of Civil Engineers, the American Institute of Mining and Metallurgical Engineers and the American Society of Mechanical Engineers. It is administered for these Founder Societies by the United Engineering Society, as a public reference library of engineering and the allied sciences. It contains 150,000 volumes and pamphlets and receives currently most of the important periodicals in its field. It is housed in the Engineering Societies Building, 29 West Thirty-ninth St., New York. In order to place the resources of the Library at the disposal of those unable to visit it in person, the Library is prepared to furnish lists of references to engineering subjects, copies or translations of articles, and similar assistance. Charges sufficient to cover the cost of this work are made. The Director of the Library will gladly give information concerning charges for the various kinds of service to those interested. In asking for information, letters should be made as definite as possible, so that the investigator may understand clearly what is desired. The library is open from 9 a. m. to 10 p. m. on all week days except holidays throughout the year except during July and August when the hours are 9 a. m. to 6 p. m.","PeriodicalId":268640,"journal":{"name":"Journal of the American Institute of Electrical Engineers","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1932-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124068543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1932-02-12DOI: 10.1109/joaiee.1923.6591883
G. Bays
The library is a cooperative activity of the American Institute of Electrical Engineers, the American Society of Civil Engineers, the American Institute of Mining and Metallurgical Engineers and the American Society of Mechanical Engineers. It is administered for these Founder Societies by the United Engineering Society, as a public reference library of engineering and the allied sciences. It contains 150,000 volumes and pamphlets and receives currently most of the important periodicals in its field. It is housed in the Engineering Societies Building, 29 West Thirtyninth St., New York. In order to place the resources of the Library at the disposal of those unable to visit it in person, the Library is prepared to furnish lists of references to engineering subjects, copies or translations of articles, and similar assistance. Charges sufficient to cover the cost of this work are made. The Director of the Library will gladly give information concerning charges for the various kinds of service to those interested. In asking for information, letters should be made as definite as possible, so that the investigator may understand clearly what is desired. The library is open from 9 a. m. to 10 p. m. on all week days except holidays throughout the year except during July and August when the hours are 9 a. m. to 6 p. m.
{"title":"Engineering societies library","authors":"G. Bays","doi":"10.1109/joaiee.1923.6591883","DOIUrl":"https://doi.org/10.1109/joaiee.1923.6591883","url":null,"abstract":"The library is a cooperative activity of the American Institute of Electrical Engineers, the American Society of Civil Engineers, the American Institute of Mining and Metallurgical Engineers and the American Society of Mechanical Engineers. It is administered for these Founder Societies by the United Engineering Society, as a public reference library of engineering and the allied sciences. It contains 150,000 volumes and pamphlets and receives currently most of the important periodicals in its field. It is housed in the Engineering Societies Building, 29 West Thirtyninth St., New York. In order to place the resources of the Library at the disposal of those unable to visit it in person, the Library is prepared to furnish lists of references to engineering subjects, copies or translations of articles, and similar assistance. Charges sufficient to cover the cost of this work are made. The Director of the Library will gladly give information concerning charges for the various kinds of service to those interested. In asking for information, letters should be made as definite as possible, so that the investigator may understand clearly what is desired. The library is open from 9 a. m. to 10 p. m. on all week days except holidays throughout the year except during July and August when the hours are 9 a. m. to 6 p. m.","PeriodicalId":268640,"journal":{"name":"Journal of the American Institute of Electrical Engineers","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1932-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128226424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1923-12-01DOI: 10.1109/JoAIEE.1923.6593434
K. B. Mceachron
This paper presents some of the results of two methods of drawing out the alternating-current corona discharge along a time axis. The first method consists in photographing, with the usual camera, the discharge from a needle point revolved by the alternator which is the source of supply for the high-voltage transformer. The needle is revolved inside a porcelain tube whose outside surface is made conducting and grounded. The second method makes use of a special camera using mirrors revolved synchronously by the alternator itself. This camera is equipped with a shutter so arranged that photographs of sparks may be taken using one sweep of one of the mirrors. Photographs have been taken showing the discharge between needles, both with and without a solid dielectric placed midway between the points. When drawn out along the time axis certain characteristics of corona discharges may be seen, even when the discharge is extremely weak for the exposure may be continued for any length of time with a reoccurring phenomenon. A few photographs giving same conception of the different discharges under varying conditions are given.
{"title":"Two photographic methods of studying high-voltage discharges","authors":"K. B. Mceachron","doi":"10.1109/JoAIEE.1923.6593434","DOIUrl":"https://doi.org/10.1109/JoAIEE.1923.6593434","url":null,"abstract":"This paper presents some of the results of two methods of drawing out the alternating-current corona discharge along a time axis. The first method consists in photographing, with the usual camera, the discharge from a needle point revolved by the alternator which is the source of supply for the high-voltage transformer. The needle is revolved inside a porcelain tube whose outside surface is made conducting and grounded. The second method makes use of a special camera using mirrors revolved synchronously by the alternator itself. This camera is equipped with a shutter so arranged that photographs of sparks may be taken using one sweep of one of the mirrors. Photographs have been taken showing the discharge between needles, both with and without a solid dielectric placed midway between the points. When drawn out along the time axis certain characteristics of corona discharges may be seen, even when the discharge is extremely weak for the exposure may be continued for any length of time with a reoccurring phenomenon. A few photographs giving same conception of the different discharges under varying conditions are given.","PeriodicalId":268640,"journal":{"name":"Journal of the American Institute of Electrical Engineers","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1923-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121170629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1923-12-01DOI: 10.1109/JOAIEE.1923.6593421
Nyman
E. W. Kellog: Mr. Nyman has mentioned a series of tests of loud speakers which I think may well be classified into what we might call the engineering tests and the listening tests.
{"title":"Discussion at annual convention: Electrical loud speakers","authors":"Nyman","doi":"10.1109/JOAIEE.1923.6593421","DOIUrl":"https://doi.org/10.1109/JOAIEE.1923.6593421","url":null,"abstract":"E. W. Kellog: Mr. Nyman has mentioned a series of tests of loud speakers which I think may well be classified into what we might call the engineering tests and the listening tests.","PeriodicalId":268640,"journal":{"name":"Journal of the American Institute of Electrical Engineers","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1923-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132721579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1923-12-01DOI: 10.1109/JOAIEE.1923.6593418
K. L. Hansen
The possibility of obtaining speed adjustment and power factor correction of induction motors by impressing an e. m. f. on the rotor is a subject which has attracted considerable attention in recent years. As compared with the straight polyphase induction motor, the graphical treatment in this case becomes much more involved, if reasonable account is to be taken of all the phenomena. The analytical treatment of the polyphase induction motor is, however, readily extended to the case when an e. m. f. is impressed on the rotor. There appears to be a general impression that in deriving formulas analytically the usual method based on the rotating magnetic field theory is no longer suitable when a voltage is impressed on the rotor, but that it is preferable to resolve the induced e. m. f. in the rotor into two components. This paper is an attempt to show that not only is the rotating field theory still applicable, but that the results can probably be obtained most readily by means of it.
{"title":"Modification of polyphase induction motor performance by introduction of E. M. F. in secondary","authors":"K. L. Hansen","doi":"10.1109/JOAIEE.1923.6593418","DOIUrl":"https://doi.org/10.1109/JOAIEE.1923.6593418","url":null,"abstract":"The possibility of obtaining speed adjustment and power factor correction of induction motors by impressing an e. m. f. on the rotor is a subject which has attracted considerable attention in recent years. As compared with the straight polyphase induction motor, the graphical treatment in this case becomes much more involved, if reasonable account is to be taken of all the phenomena. The analytical treatment of the polyphase induction motor is, however, readily extended to the case when an e. m. f. is impressed on the rotor. There appears to be a general impression that in deriving formulas analytically the usual method based on the rotating magnetic field theory is no longer suitable when a voltage is impressed on the rotor, but that it is preferable to resolve the induced e. m. f. in the rotor into two components. This paper is an attempt to show that not only is the rotating field theory still applicable, but that the results can probably be obtained most readily by means of it.","PeriodicalId":268640,"journal":{"name":"Journal of the American Institute of Electrical Engineers","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1923-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115310974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1923-12-01DOI: 10.1109/JOAIEE.1923.6593424
Bush
A. Boyajian: I believe one of the puzzling discrepancies, viz., the nature of the wave front, mentioned in this paper is capable of a comparatively simple physical explanation.
a . Boyajian:我相信这篇论文中提到的令人困惑的差异之一，即波前的性质，可以用一个相对简单的物理解释。
{"title":"Discussion on transmission line transients","authors":"Bush","doi":"10.1109/JOAIEE.1923.6593424","DOIUrl":"https://doi.org/10.1109/JOAIEE.1923.6593424","url":null,"abstract":"A. Boyajian: I believe one of the puzzling discrepancies, viz., the nature of the wave front, mentioned in this paper is capable of a comparatively simple physical explanation.","PeriodicalId":268640,"journal":{"name":"Journal of the American Institute of Electrical Engineers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1923-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130641968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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