{"_buckets": {"deposit": "cd6b9795-382b-4ba0-9a4c-6a3a9a2dc69d"}, "_deposit": {"created_by": 21, "id": "2474", "owners": [21], "pid": {"revision_id": 0, "type": "depid", "value": "2474"}, "status": "published"}, "_oai": {"id": "oai:ir.soken.ac.jp:00002474", "sets": ["16"]}, "author_link": ["0", "0", "0"], "item_1_biblio_info_21": {"attribute_name": "書誌情報（ソート用）", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2011-03-24", "bibliographicIssueDateType": "Issued"}, "bibliographic_titles": [{}]}]}, "item_1_creator_2": {"attribute_name": "著者名", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "ROSAS-LOPEZ, Igmar Cedrell"}], "nameIdentifiers": [{"nameIdentifier": "0", "nameIdentifierScheme": "WEKO"}]}]}, "item_1_creator_3": {"attribute_name": "フリガナ", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "ロサス　ロペス　, イグマール　セドエル"}], "nameIdentifiers": [{"nameIdentifier": "0", "nameIdentifierScheme": "WEKO"}]}]}, "item_1_date_granted_11": {"attribute_name": "学位授与年月日", "attribute_value_mlt": [{"subitem_dategranted": "2011-03-24"}]}, "item_1_degree_grantor_5": {"attribute_name": "学位授与機関", "attribute_value_mlt": [{"subitem_degreegrantor": [{"subitem_degreegrantor_name": "総合研究大学院大学"}]}]}, "item_1_degree_name_6": {"attribute_name": "学位名", "attribute_value_mlt": [{"subitem_degreename": "博士（理学）"}]}, "item_1_description_1": {"attribute_name": "ID", "attribute_value_mlt": [{"subitem_description": "2011024", "subitem_description_type": "Other"}]}, "item_1_description_12": {"attribute_name": "要旨", "attribute_value_mlt": [{"subitem_description": "\u0026nbsp;\u0026nbsp;In this work we study how the introduction of a two-form field flux modifies the dynamics of string gas cosmology in different schemes. In chapter 1, we give a short introduction to the string gas cosmology model. In chapter 2 we present the T-duality invariant string gas cosmology modelof Greene, Kabat and Marnerides which replaces the Newtonian-like kinetic terms in the dilaton gravity action by their relativistic counterparts. We introduce the contribution of the two-form field into this model. The two-form flux induces a repulsive potential term in the effective action for the scale factor of the spatial dimensions. Without the two-form field flux, the universe fails to expand when the pressure due to string modes vanishes. \r\n\u0026nbsp;\u0026nbsp;With the presence of a homogeneous two-form field flux, it propels 3 spatial dimensions to grow into a macroscopic 4 dimensional space-time. We find that it triggers an expansion of a universe away from the oscillating phase around the self-dual radius. Using the same model we also investigate the effects of a constant two-form field. We can obtain an expanding 4 dimensional space-time\r\nby tuning it at the critical value.\r\n\u0026nbsp;\u0026nbsp;In chapter 3 we investigate the behaviour of the two-form field in two different models equipped with a moduli stabilization mechanism. The first model uses D-branes, NS5 branes and KK5 monopoles in order to fix the moduli. A simplified KK5-D1 with  a two-form field is analyzed. We include the two-form field into the system and conclude that the dilaton is no longer stabilized in this extended model. The second scheme we study consist of a cosmology in which the  moduli are fixed using superpotentials. We assume a situation where all the moduli have been fixed except the radion. We find that the inclusion of a two-form field in the action  gives a contribution to the effective potential of the radion that  helps enhance the stabilization mechanism.", "subitem_description_type": "Other"}]}, "item_1_description_7": {"attribute_name": "学位記番号", "attribute_value_mlt": [{"subitem_description": "総研大甲第1418号", "subitem_description_type": "Other"}]}, "item_1_select_14": {"attribute_name": "所蔵", "attribute_value_mlt": [{"subitem_select_item": "有"}]}, "item_1_select_16": {"attribute_name": "複写", "attribute_value_mlt": [{"subitem_select_item": "印刷物から複写可"}]}, "item_1_select_17": {"attribute_name": "公開状況", "attribute_value_mlt": [{"subitem_select_item": "要旨のみ公開"}]}, "item_1_select_8": {"attribute_name": "研究科", "attribute_value_mlt": [{"subitem_select_item": "高エネルギー加速器科学研究科"}]}, "item_1_select_9": {"attribute_name": "専攻", "attribute_value_mlt": [{"subitem_select_item": "14 素粒子原子核専攻"}]}, "item_1_text_10": {"attribute_name": "学位授与年度", "attribute_value_mlt": [{"subitem_text_value": "2010"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "ROSAS-LOPEZ, Igmar Cedrell", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "0", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2016-02-17"}], "displaytype": "simple", "download_preview_message": "", "file_order": 0, "filename": "甲1418_要旨.pdf", "filesize": [{"value": "196.1 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_11", "mimetype": "application/pdf", "size": 196100.0, "url": {"label": "要旨・審査要旨", "url": "https://ir.soken.ac.jp/record/2474/files/甲1418_要旨.pdf"}, "version_id": "bb137481-4f0d-4c65-b763-ec5562b38d07"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "thesis", "resourceuri": "http://purl.org/coar/resource_type/c_46ec"}]}, "item_title": "FLUXES IN STRING/BRANE GAS COSMOLOGY", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "FLUXES IN STRING/BRANE GAS COSMOLOGY"}, {"subitem_title": "FLUXES IN STRING/BRANE GAS COSMOLOGY", "subitem_title_language": "en"}]}, "item_type_id": "1", "owner": "21", "path": ["16"], "permalink_uri": "https://ir.soken.ac.jp/records/2474", "pubdate": {"attribute_name": "公開日", "attribute_value": "2011-12-27"}, "publish_date": "2011-12-27", "publish_status": "0", "recid": "2474", "relation": {}, "relation_version_is_last": true, "title": ["FLUXES IN STRING/BRANE GAS COSMOLOGY"], "weko_shared_id": -1}