|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Mechanical modeling for pipes in horizontal drilling 显示文摘 | Maria Anna Polak Afdal Lasheen | 2002 | Tunneling and Under- ground Space Technology2002，，16： | 1 |
| 2 | The origin of the suspended particulate matter in the seagrass meadow of tropical waters, an evidence of the stable isotope signatures显示文摘Suspended particulate matter(SPM) has been known as an important variable in the organic matter flow of coastal ecosystem. Half of burial carbon in seagrass meadows is contributed by allochthonous sources that compose the SPM such as phytoplankton, seagrass detritus, marine snow aggregates and terrestrially derived particles. Each composition of the SPM contributes different roles and is important to be identified, for instance,the exact contribution of seagrass detritus will be useful for determination of carbon export through the detritus form in seagrass meadows. Here, the SPM of seagrass meadows is studied in Bintan Island and the Selayar Archipelago. The aim of this research is to determine the source origin of the SPM using a stable isotope signature.In order to fulfill this aim, the objectives are defined as:(1) to specify the stable isotope signature(δ13C and δ15N)of the SPM, and(2) to determine the proportional distribution of the SPM's prospectus sources. The result shows that the possibility of the source origin of the SPM includes a seagrass fraction(Enhalus acoroides and Thalassia hemprichii), terrestrial C4 plant, macroalgae, and terrestrial C3 plant. The SPM lies between the marine-and terrigenous-end members. However, it seems that the SPM is more to be terrigenous-end and allochthonous.According to a Bayesian mixing model, the terrestrial C4 has the highest contribution of the SPM at all sites except Barugaia and Pasi Island in Selayar(i.e., the highest contribution of the SPM is from the detritus of E. acoroides).The second contribution has been contributed by either seagrass detritus(E. acoroides or Th. hemprichii) or terrestrial C3 plant. The finding of this study indicates that there is a strong influence of the terrigenous sources in the SPM of the seagrass meadows. | A'an Johan Wahyudi Afdal | 2019 | Acta Oceanologica Sinica2019，38，1： | 1 |
| 3 | 芬兰和挪威教师教育政策制定过程分析显示文摘前言 本研究主要对芬兰和挪威的教师教育政策制定过程进行了分析,在对有经验的政策制定者的访谈基础上,集中探讨了初级教师教育政策制定过程中不同参与者的角色和地位以及权力分配对于政策制定的影响。本研究的主要目的是加深大家对于政策制定过程中不同社会结构、参与者以及规章制度对于教师教育知识体系产生影响方式的理解,并且探讨芬兰和挪威在此方面呈现出的不同特征。 | 白杨杨 | 2015 | 国际高等教育研究2015，0，1： | 0 |
| 4 | The decomposition rate of the organic carbon content of suspended particulate matter in the tropical seagrass meadows显示文摘In terms of downward transport,suspended particulate matter(SPM)from marine or terrigenous sources is an essential contributor to the carbon cycle.Within mesoscale environments such as seagrass ecosystems,SPM flux is an essential part of the total carbon budget that is transported within the ecosystem.By assessing the total SPM transport from water column to sediment,potential carbon burial can be estimated.However,SPM may decompose or reforming aggregate during transport,so estimating the vertical flux without knowing the decomposition rate will lead to over-or underestimation of the total carbon budget.Here this paper presents the potential decomposition rate of the SPM in seagrass ecosystems in an attempt to elucidate the carbon dynamics of SPM.SPM was collected from the seagrass ecosystems located at Sikka and Sorong in Indonesia.In situ experiments using SPM traps were conducted to assess the vertical downward flux and decomposition rate of SPM.The isotopic profile of SPM was measured together with organic carbon and total nitrogen content.The results show that SPM was transported to the bottom of the seagrass ecosystem at a rate of up to(129.45±53.79)mg/(m^(2)·h)(according to carbon).Considering the whole period of inundation of seagrass meadows,SPM downward flux reached a maximum of 3096 mg/(m^(2)·d)(according to carbon).The decomposition rate was estimated at from 5.9μg/(mg·d)(according to carbon)to 26.6μg/(mg·d)(according to carbon).Considering the total downward flux of SPM in the study site,the maximum decomposed SPM was estimated 39.9 mg/(m^(2)·d)(according to carbon)and 82.6 mg/(m^(2)·d)(according to carbon)for study site at Sorong and Sikka,respectively.The decomposed SPM can be 0.6%–2.7%of the total SPM flux,indicating that it is a small proportion of the total flux.The seagrass ecosystems of Sorong and Sikka SPM show an autochthonous tendency with the primary composition of marine-end materials. | A'an Johan Wahyudi Karlina Triana Afdal Afdal Hanif Budi Prayitno Edwards Taufiqurrahman Hanny Meirinawati Rachma Puspitasari Lestari Lestari Suci Lastrini | 2021 | Acta Oceanologica Sinica2021，40，8： | 0 |
| 5 | 芬兰和挪威教师教育政策制定过程的比较分析显示文摘一、引言
本文主要讨论芬兰和挪威教师教育政策制定过程。重点关注第一阶段的教师教育政策。不同参与者在决策过程中所扮演的角色和地位不同,其权力的分配对决策过程的影响需要重视。本文对经验丰富的决策者进行针对性访谈来分析当代政策制定过程,以期了解以知识为基础的教师教育政策制定过程中受结构、参与者和规则的影响方式.并讨论芬兰和挪威所代表的不同传统。 | Hilde Wagsas Afdal 许温洁 | 2017 | 国际高等教育研究2017，0，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员