1 Second Deliverable

Building from the data set you used in the first deliverable, complete the following tasks:

  1. With your own words, explain what problems we aimed to solve with the creation of an ID adjacency list and a names adjacency list?

By creating the ID adjacency list and the names adjacency list of the authors, we are using them to create the edge lists to list out the connections of authorship of each article. It is an essential step for us to clearly see the connections between the authors.

  1. During your cleaning procedures, did your adjacency lists for names and ID have the same dimensions? If so, what is the meaning of these dimensions?

The dimensions of both adjacency lists are [179, 41]. It means that I have 179 articles in total, with at least one of the article having 41 authors.

2.1 Let us assume that you did not have the same dimensions, what would be the reason for this discrepancy and how would you address this issue?

It could be due to some authors’ name changes over time, while it is still the same person, R would not recognize the different names as the same person. And the author’s ID stays the same as the name may change, hence the numbers of ID may not match the numbers of the names. To address this issue, we need to match the ID with its most recent publication’s author’s name.

  1. As part of the feature engineering procedures, we created a database with ID and Name columns.

3.1 What is the meaning of the number of rows of this database?

It means the total number of unique authors we have in the database.

3.2 Does this number match the number of unique actors you have in your first deliverable in the object g (i.e., the graph we created)?

No, it does not match. The number in object g is smaller than the total number of rows in this data set.

3.3 If the number does not match, what do you think is the reason for this mismatch?

The reason for this mismatch could be that solo authors’ IDs are not included in the igraph I printed in the first deliverable. They were excluded because they did not have any coauthors.

  1. Please explain the role of unlisting in this data cleaning or feature engineering process.

By unlisting both author IDs and their names into separate column, it is easier for us to match each ID with the author’s name in the following steps.

  1. Who are the top five most prolific authors? And what are they publishing about?

There are 10 most prolific authors in my data set because they all published 2 articles within this five-years time span, while all other authors only published one article. Most of these authors’ publications situate around the effects of AI tools (such as Google Assistants) have on second language teaching and learning.

library(splitstackshape)
library(igraph)
## 
## Attaching package: 'igraph'
## The following objects are masked from 'package:stats':
## 
##     decompose, spectrum
## The following object is masked from 'package:base':
## 
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getwd()
## [1] "/Users/aihe/Desktop"
source <- read.csv("/Users/aihe/Desktop/AI_SLL.csv")
source <- source[source$Author.s..ID!="[No author id available]",]
source$au <- gsub(" Jr.,", "", 
                  gsub(" II.,", "", 
                       gsub(" Jr.", "",
                            gsub(" M.S.", "",
                                 gsub(" M.S.,", "",
                                      gsub(" II.", "", source[,1]))))))
source$au <- gsub("\\.,", ";", source$au)
source$au <- tolower(source$au)
df_all_authors <- as.data.frame(source[ , ncol(source)])
colnames(df_all_authors) <- "AU"

authornames_split <- cSplit(df_all_authors, splitCols = "AU", sep = ";", direction = "wide", drop = TRUE)
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dim(authornames_split)
## [1] 179  41
df_authors_id <- as.data.frame(source[ , 2])
colnames(df_authors_id) <- "AU"
author_id_split <- cSplit(df_authors_id, splitCols = "AU", sep = ";", direction = "wide", drop = TRUE) 
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dim(author_id_split)
## [1] 179  41
df_authorid_authorname_unlisted <- data.frame(id = unlist(author_id_split), names = unlist(authornames_split))
df_authorid_authorname_unlisted <- df_authorid_authorname_unlisted[!is.na(df_authorid_authorname_unlisted$id),]
dim(df_authorid_authorname_unlisted)
## [1] 737   2
df_authorid_authorname_unlisted <- df_authorid_authorname_unlisted[!duplicated(df_authorid_authorname_unlisted$id),]
dim(df_authorid_authorname_unlisted)
## [1] 727   2
pub_count <- as.data.frame(table(unlist(author_id_split)))
df_authorid_authorname_unlisted$pub_count <- pub_count$Freq[match(df_authorid_authorname_unlisted$id, pub_count$Var1)]
head(df_authorid_authorname_unlisted[order(df_authorid_authorname_unlisted$pub_count, decreasing=T),])
##                  id          names pub_count
## AU_015  58061860400 moulieswaran n         2
## AU_018  57221813377          sha l         2
## AU_0119 57222872644       kim h.-s         2
## AU_0138 57220797184      kim n.-y.         2
## AU_0196 57219976831       garvin t         2
## AU_028  57063266900   camburu o.-m         2
df_authorid_authorname_unlisted<-df_authorid_authorname_unlisted[order(df_authorid_authorname_unlisted$pub_count, decreasing=T),]
head(df_authorid_authorname_unlisted)
##                  id          names pub_count
## AU_015  58061860400 moulieswaran n         2
## AU_018  57221813377          sha l         2
## AU_0119 57222872644       kim h.-s         2
## AU_0138 57220797184      kim n.-y.         2
## AU_0196 57219976831       garvin t         2
## AU_028  57063266900   camburu o.-m         2
a<-df_authorid_authorname_unlisted
head(a)
##                  id          names pub_count
## AU_015  58061860400 moulieswaran n         2
## AU_018  57221813377          sha l         2
## AU_0119 57222872644       kim h.-s         2
## AU_0138 57220797184      kim n.-y.         2
## AU_0196 57219976831       garvin t         2
## AU_028  57063266900   camburu o.-m         2
a
##                   id                 names pub_count
## AU_015   58061860400        moulieswaran n         2
## AU_018   57221813377                 sha l         2
## AU_0119  57222872644              kim h.-s         2
## AU_0138  57220797184             kim n.-y.         2
## AU_0196  57219976831              garvin t         2
## AU_028   57063266900          camburu o.-m         2
## AU_0219  57222869163                cha y.         2
## AU_0296  57222104444          kimbleton s.         2
## AU_038    7004581222        lukasiewicz t.         2
## AU_0780   7007035549             kalra m.k         2
## AU_011   57223640712            aattouri i         1
## AU_012   57753915200            almuhana h         1
## AU_013   58288848400         leidinger m.l         1
## AU_014   58258344100         almelhes s.a.         1
## AU_016   57301216200           chaudhury s         1
## AU_017   50262958000          sankaran g.c         1
## AU_019   57769896800                 liu x         1
## AU_0110  41561548400             hockly n.         1
## AU_0111  57222072140               rad h.s         1
## AU_0112  58205160300    hilao-valencia p.m         1
## AU_0113  57191156064              ouared a         1
## AU_0114  58158727000    sargazi moghadam t         1
## AU_0115  57209902552               singh a         1
## AU_0116  57211158344             havinga i         1
## AU_0117  57220870257             barbosa b         1
## AU_0118  58127773400            yang l.w.y         1
## AU_0120   7006806419           kralik j.d.         1
## AU_0121  57225105038             mahdi a.y         1
## AU_0122  14039593800               mouti s         1
## AU_0124  57204435819              olenyi t         1
## AU_0125  36798836700            hillis j.m         1
## AU_0126  56069417000           lyakhov p.a         1
## AU_0127  57815760300                zhai c         1
## AU_0128  58001297000                 jia f         1
## AU_0129   6507753094            aggour k.s         1
## AU_0130  57219504036             ellouze m         1
## AU_0131  54983615000                wen y.         1
## AU_0132  55926354300                wang c         1
## AU_0133  57219767642            wang w.-y.         1
## AU_0134  36172570800            kiršienė j         1
## AU_0135  48761086600             bagwari a         1
## AU_0136  57210930261                zhao m         1
## AU_0137  57219869911                yang h         1
## AU_0139  57221155136          fitzgerald j         1
## AU_0140  57934715300                 cho a         1
## AU_0141   7102737497             raymond l         1
## AU_0142  57211179736             saletta m         1
## AU_0143  57197367955            mazumder s         1
## AU_0144  56110796400            shumanov m         1
## AU_0145  57226501136             choi s.-w         1
## AU_0146  56222449000                  li p         1
## AU_0147  57386743700            altuntas e         1
## AU_0148  57216505553             ozyegen o         1
## AU_0149  57211179037              hadash s         1
## AU_0150  25224958200                weng t         1
## AU_0151  56428688000            munshi a.a         1
## AU_0152  57211216027                 zhu y         1
## AU_0153  57226123822             giczy a.v         1
## AU_0154  56167713200            ajeesh a.k         1
## AU_0155  58153484900                 liu x         1
## AU_0156  57215564594              norval m         1
## AU_0157  58190517000      anisha angel s.j         1
## AU_0158  39861723900               johri e         1
## AU_0159  57219149785           burkhard m.         1
## AU_0160  57197842818                shao s         1
## AU_0161  58082025400         gkountara d.n         1
## AU_0162  56428754000           radulescu a         1
## AU_0163  58037385100             çelık e.y         1
## AU_0164  57264237100         shingjergji k         1
## AU_0165  57191258091              bionda e         1
## AU_0166  57280498100            bernabei m         1
## AU_0167  55557685700              desnos k         1
## AU_0168   8707974500          costantini s         1
## AU_0169  57206653462                chen s         1
## AU_0170  57770620100                chen l         1
## AU_0171  57878411800      shanbhogue a.v.k         1
## AU_0172  57848014900                  do v         1
## AU_0173  57195052866                chen x         1
## AU_0174  57222732463              gurung a         1
## AU_0175  35810204600              ehara y.         1
## AU_0176   7003503895              blasch e         1
## AU_0177  37103431600                borg m         1
## AU_0178  57671191500                deng l         1
## AU_0179  57226515167             jeong y.h         1
## AU_0180   7005613223              suri j.s         1
## AU_0181  57194058144              park w.h         1
## AU_0182  57330645200                 cho d         1
## AU_0183  57681534300                hang y         1
## AU_0184  57407276400           alanazi a.h         1
## AU_0185  57201254861                wang x         1
## AU_0186  57223041596               payal r         1
## AU_0187  57280427400             gayed j.m         1
## AU_0188  57425168000        kishan varma s         1
## AU_0189  57215480913           alexiadis a         1
## AU_0190  57220903146              tran d.c         1
## AU_0191   6603820508            rustamov s         1
## AU_0192  57329885900              cruz a.p         1
## AU_0193  57211181875                  su z         1
## AU_0194  37038639000                 sun g         1
## AU_0195  57205407897          liesenfeld a         1
## AU_0197  57224322064             bärmann l         1
## AU_0198  55609391300             podobas a         1
## AU_0199  57263711300                 wei w         1
## AU_01100 57203394018                ruan s         1
## AU_01101 57200703350             adikari a         1
## AU_01102 57210802574                 lee d         1
## AU_01103 57207695744                  wu b         1
## AU_01104 57223724645               fytas p         1
## AU_01105  6602396501            el-ramly m         1
## AU_01106 57218880021          kankaria r.v         1
## AU_01107 57194513330          polpanumas c         1
## AU_01108 57478725300                 sun w         1
## AU_01109 56612034400               gadri s         1
## AU_01110 57022190500          varghese a.b         1
## AU_01111 57433346600                gala h         1
## AU_01112 57433638800              dinesh t         1
## AU_01113 57194719240              issa t.b         1
## AU_01115 57693720300                 das s         1
## AU_01116 57197045179        confalonieri r         1
## AU_01117 57315121800              alnami a         1
## AU_01118 57218265736            jariwala a         1
## AU_01120 57202607831              lourie n         1
## AU_01121 55806765400            poongodi m         1
## AU_01122 56230086000            pikhart m.         1
## AU_01123 57223898570           doumbouya m         1
## AU_01124 57212303924          williams k.a         1
## AU_01125 56565582500              haruna u         1
## AU_01126 57212346601             dillard l         1
## AU_01127 57188667328           moriuchi e.         1
## AU_01128 57209782796                wang y         1
## AU_01129  7005093287          lawless w.f.         1
## AU_01130 57200090297               mehta s         1
## AU_01131 57219900034           altinkaya m         1
## AU_01132 57218759346                  he s         1
## AU_01133 42461000900             brei v.a.         1
## AU_01134 55871621100            kowalski j         1
## AU_01135 57214939217               leite b         1
## AU_01136 56406067400       bhattacharjee a         1
## AU_01137  6504574010            yabloko l.         1
## AU_01138 57202902190              alam m.m         1
## AU_01139 55848921100           choubey s.k         1
## AU_01140 57368537700           almutairi a         1
## AU_01141 55597573100                wang l         1
## AU_01143 57198891988               kumar a         1
## AU_01144  7102746954            tavazzi l.         1
## AU_01145 57191243306        giannopoulou e         1
## AU_01146 57193133189            alotaibi r         1
## AU_01147 57219591833             silva a.c         1
## AU_01148 57218311587                qian m         1
## AU_01149 57216297312   gómez-hernández e.j         1
## AU_01150  6602862826            khemani d.         1
## AU_01151 57188757098                  yu f         1
## AU_01152 57195473676             demirer m         1
## AU_01153 57211759490           nakamura k.         1
## AU_01154 57215117931               smuts m         1
## AU_01155 57212103868           reynolds o.         1
## AU_01156 56257339200                pang s         1
## AU_01157 55933624700                shen j         1
## AU_01158 57091199200               osman a         1
## AU_01159 57210321313                yan w.         1
## AU_01160 57073076300          abo khamis m         1
## AU_01161  6701815202            jaakkola h         1
## AU_01162  7101677064           behrens j.t         1
## AU_01163  8310138000       godwin-jones r.         1
## AU_01164 57202790788       benzebouchi n.e         1
## AU_01165 16315433700              freeze r         1
## AU_01166 57201320595                 tan h         1
## AU_01167  8590706200              chen j.f         1
## AU_01168 57203284197              khan m.a         1
## AU_01169 57211253293                  xu j         1
## AU_01170 57211203593               greco c         1
## AU_01171 57193775331            tafazoli d         1
## AU_01172 56440077800   mohamed mokmin n.a.         1
## AU_01173 57195223484               ehsan u         1
## AU_01174 57140451800            alotaibi b         1
## AU_01175 46461354700              mandal s         1
## AU_01176 17433844400            cubrilo m.         1
## AU_01177 57088207100              jee m.j.         1
## AU_01178 55505341400              kannan j         1
## AU_01179 57202791748        levendowski a.         1
## AU_021   14627618600             mouncif h         1
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