Finding & Accessing Scientific Papers

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# Finding & Accessing Scientific Papers
## -植物生理生态领域
### Dongliang Xiong | 熊栋梁 <a href="https://dlxiong.com" class="uri">https://dlxiong.com</a>
### 2019/03/31

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## Introduction

- Reading scientific literature is a critical part of conceiving of and executing a successful advanced science project.

- Discovering truth by building on previous discoveries

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We want to know the impacts of **Drought** on **Photosynthesis**.

The first step is to read literature in the field.

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## Where do you search papers

- **Google Scholar** (https://scholar.google.com/)  (**六星推荐**)
  - 全球范围内使用最广泛
  - **免费**、**全面**、简单、更新周期几乎与期刊同步
  - 在中国大陆被屏蔽，需采用不稳定的镜像‘非法’访问

- **Dimensions** (https://www.dimensions.ai) (**五星推荐**)
  - 新上线的科研助手
  - 更新速度较快
  - 比较全面

- **Pubmed** (https://ncbi.nlm.nih.gov/pubmed)  (**四星推荐**)
  - 专注医学和生物学

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## Where do you search papers

- **Web of Science** (https://webofknowledge.com) (**推荐高质量搜索**)
  - 筛选标准相对比较高
  - 收费、更新相当缓慢
  - ESI、SCI (Stupid Chinese Idea) 等评价指标的基础数据库
  - Meta-analysis等基于文献数据研究的首选数据库

- **Scopus** (https://www.scopus.com)
  - 比较全面，筛选标准高于google但低于web of Sci
  - 收费、更新较慢
  - 爱思唯尔高引科学家等基础数据库
  - 大多数国内高校无权限（[抵制Elsevier](https://gowers.wordpress.com/2012/01/21/elsevier-my-part-in-its-downfall/)）

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## Where do you search papers

- **Others**
  - Loop (https://loop.frontiersin.org/)
  - Baidu (http://xueshu.baidu.com/)
  - Bing Academic (https://www.bing.com/academic/)
  - CNKI (https://www.cnki.net/)
  - ...

在其他选项有困难时可作为备用。相对而言，这些工具不仅资源稀少，还低效。

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## How to search papers

### Basic search

- 关键词 i.e. "drought", "leaf", "Photosynthesis"
- 人名（姓）i.e. 'Tyree, M.', 'Boyer. J'

### Advanced search

- 检索式（不同数据库有不一样的规则，需自行查看）
  - AND; NOT; OR 三大连接词
  - 善用' ' or " "以获取词组关键词搜索功能
  - Article type, Publish time
  - Field Tags

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## How to search papers
**Web of Science**

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## How to search papers
**Web of Science**

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## How to search papers

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## How to search papers

<img src="Images/12-ISI_anal.png" width="70%" style="display: block; margin: auto;" />
 
利用数据库提供的过滤功能，分析所检索的文献资料。了解领域发展动态。

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## How to evaluate the quality of the paper

7612 篇英文文章！！

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## How to evaluate the quality of the paper

-  2.5 million articles published each year, in about 28,000 journals. (2014)
  - [21st Century Science Overload](http://blog.cdnsciencepub.com/21st-century-science-overload/)
  - [Potential predatory scholarly open‑access publishers](https://beallslist.weebly.com/)

面对如此大量的文献，我们何去何从？

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## How to evaluate the quality of the paper
.pull-left[
<img src="Images/08-How-to.jpg" width="80%" style="display: block; margin: auto;" />
- Impact factor
 - 概率上文章引用次数较高
 - 评价单篇文章可能不准确
 - 不同学科半衰期不同
 - 就高不就低(农艺_vs_植物学)

参考阅读：[高被引论文](https://www.dlxiong.com/cn/2019/03/17/highlycited/)

]

.pull-right[
- Citation
  - 领域热度
  - 发表时间
  - 不一定代表研究的价值
- Social medium 
  - 研究尺度（精尖以及大尺度）
  - 领域难题
  - 重大突破及广泛应用前景
  - [Altmetric](https://www.altmetric.com/) 
- [F1000](https://f1000.com/)
  - Peer commendation
- Research group
  - 信誉和名誉
]

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## How to evaluate the quality of the paper

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## How to download papers without access

Open Access _vs_ Traditional Journals

<img src="Images/05-OAJ.png" width="50%" style="display: block; margin: auto;" />
> Open to everyone in any place

.pull-left[
- Full OA journals 
  - Plos library, PeerJ
  - Nature communication, eLife
  - Sci Rep, Front Plant Sci
]

.pull-right[
- Mix Journals 
  - Almost all journals in plant science
]

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## How to download papers without access

<img src="Images/14-npaccess.png" width="75%" style="display: block; margin: auto;" />
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 购买权限是最佳选择。

然而。。。
 
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## How to download papers without access

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## How to download papers without access

Solutions?

.pull-left[
- [Sci-Hub](http://sci-hub.tw/)
  - 严格意义上“不合法”
  - 几乎能找到领域内的全部文献

- [Researchgate](https://www.researchgate.net/)
  - 作者共享
  - 多数情况不合法
- [Academia](https://www.academia.edu/)
  - 与ResearchGate类似
  - 濒临倒闭
]

.pull-right[

- Preprint platforms
  - [bioRxiv](https://www.biorxiv.org/)
  - 合法途径，通常与最终发表版本有差异
- Authors website
  - 作者自己上传
  - 多数情况也是违反版权协议的
- Email to Authors
  - 有时候也是不错的选择
]

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## How to download papers without access

当前可用网站：http://sci-hub.tw/

<img src="Images/10-scihub.png" width="75%" style="display: block; margin: auto;" />
 
The information you need: **DOI** of the paper.

About the DOI, read 《[DOI时代的论文链接](https://www.dlxiong.com/cn/2018/12/05/doi/)》

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Enjoy your trip !

Email: dlxiong@mail.hzau.edu.cn 
Homepage: https://www.dlxiong.com

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