/**
   * Begin Global Customer Configuration Variables
   **/
   
   var DM_TGID = "a0"; 	
   var DM_CSID = "L02370";
   var DM_UIDS = 1;
   var DM_CHN  = ".technologyreview.com";
   var DM_PIX  = "digimine.technologyreview.com";
   var DM_BPIX = "digimine.technologyreview.com";
   var DM_UIDD = ".technologyreview.com";
   var DM_UIDP = "/";

   var DM_UIDC = "userID";
   var DM_UIDN = "";
   var DM_UIDE = 0;

   /** 
   * End Customer Configurable Variables 
   **/
   
var _DTE=new Date(); var _UNV=navigator; var _UDC=document; var _CHR=null; var _sImg=new Array(); var _evts=new Array(); var _hexc=new Array("0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"); var _hexd=new Array(256); var _BCL1="?&=%.()"; var _GCL2="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; for(_CHR="",i=0;i<256;i++) { _hexd[i]=_hexc[Math.floor((i)/16)]+_hexc[(i)%16]; _CHR+=String.fromCharCode(i);  } var _CRCTbl = new Array( 0x00000000,0x77073096,0xee0e612c,0x990951ba,0x076dc419, 0x706af48f,0xe963a535,0x9e6495a3,0x0edb8832,0x79dcb8a4, 0xe0d5e91e,0x97d2d988,0x09b64c2b,0x7eb17cbd,0xe7b82d07, 0x90bf1d91,0x1db71064,0x6ab020f2,0xf3b97148,0x84be41de, 0x1adad47d,0x6ddde4eb,0xf4d4b551,0x83d385c7,0x136c9856, 0x646ba8c0,0xfd62f97a,0x8a65c9ec,0x14015c4f,0x63066cd9, 0xfa0f3d63,0x8d080df5,0x3b6e20c8,0x4c69105e,0xd56041e4, 0xa2677172,0x3c03e4d1,0x4b04d447,0xd20d85fd,0xa50ab56b, 0x35b5a8fa,0x42b2986c,0xdbbbc9d6,0xacbcf940,0x32d86ce3, 0x45df5c75,0xdcd60dcf,0xabd13d59,0x26d930ac,0x51de003a, 0xc8d75180,0xbfd06116,0x21b4f4b5,0x56b3c423,0xcfba9599, 0xb8bda50f,0x2802b89e,0x5f058808,0xc60cd9b2,0xb10be924, 0x2f6f7c87,0x58684c11,0xc1611dab,0xb6662d3d,0x76dc4190, 0x01db7106,0x98d220bc,0xefd5102a,0x71b18589,0x06b6b51f, 0x9fbfe4a5,0xe8b8d433,0x7807c9a2,0x0f00f934,0x9609a88e, 0xe10e9818,0x7f6a0dbb,0x086d3d2d,0x91646c97,0xe6635c01, 0x6b6b51f4,0x1c6c6162,0x856530d8,0xf262004e,0x6c0695ed, 0x1b01a57b,0x8208f4c1,0xf50fc457,0x65b0d9c6,0x12b7e950, 0x8bbeb8ea,0xfcb9887c,0x62dd1ddf,0x15da2d49,0x8cd37cf3, 0xfbd44c65,0x4db26158,0x3ab551ce,0xa3bc0074,0xd4bb30e2, 0x4adfa541,0x3dd895d7,0xa4d1c46d,0xd3d6f4fb,0x4369e96a, 0x346ed9fc,0xad678846,0xda60b8d0,0x44042d73,0x33031de5, 0xaa0a4c5f,0xdd0d7cc9,0x5005713c,0x270241aa,0xbe0b1010, 0xc90c2086,0x5768b525,0x206f85b3,0xb966d409,0xce61e49f, 0x5edef90e,0x29d9c998,0xb0d09822,0xc7d7a8b4,0x59b33d17, 0x2eb40d81,0xb7bd5c3b,0xc0ba6cad,0xedb88320,0x9abfb3b6, 0x03b6e20c,0x74b1d29a,0xead54739,0x9dd277af,0x04db2615, 0x73dc1683,0xe3630b12,0x94643b84,0x0d6d6a3e,0x7a6a5aa8, 0xe40ecf0b,0x9309ff9d,0x0a00ae27,0x7d079eb1,0xf00f9344, 0x8708a3d2,0x1e01f268,0x6906c2fe,0xf762575d,0x806567cb, 0x196c3671,0x6e6b06e7,0xfed41b76,0x89d32be0,0x10da7a5a, 0x67dd4acc,0xf9b9df6f,0x8ebeeff9,0x17b7be43,0x60b08ed5, 0xd6d6a3e8,0xa1d1937e,0x38d8c2c4,0x4fdff252,0xd1bb67f1, 0xa6bc5767,0x3fb506dd,0x48b2364b,0xd80d2bda,0xaf0a1b4c, 0x36034af6,0x41047a60,0xdf60efc3,0xa867df55,0x316e8eef, 0x4669be79,0xcb61b38c,0xbc66831a,0x256fd2a0,0x5268e236, 0xcc0c7795,0xbb0b4703,0x220216b9,0x5505262f,0xc5ba3bbe, 0xb2bd0b28,0x2bb45a92,0x5cb36a04,0xc2d7ffa7,0xb5d0cf31, 0x2cd99e8b,0x5bdeae1d,0x9b64c2b0,0xec63f226,0x756aa39c, 0x026d930a,0x9c0906a9,0xeb0e363f,0x72076785,0x05005713, 0x95bf4a82,0xe2b87a14,0x7bb12bae,0x0cb61b38,0x92d28e9b, 0xe5d5be0d,0x7cdcefb7,0x0bdbdf21,0x86d3d2d4,0xf1d4e242, 0x68ddb3f8,0x1fda836e,0x81be16cd,0xf6b9265b,0x6fb077e1, 0x18b74777,0x88085ae6,0xff0f6a70,0x66063bca,0x11010b5c, 0x8f659eff,0xf862ae69,0x616bffd3,0x166ccf45,0xa00ae278, 0xd70dd2ee,0x4e048354,0x3903b3c2,0xa7672661,0xd06016f7, 0x4969474d,0x3e6e77db,0xaed16a4a,0xd9d65adc,0x40df0b66, 0x37d83bf0,0xa9bcae53,0xdebb9ec5,0x47b2cf7f,0x30b5ffe9, 0xbdbdf21c,0xcabac28a,0x53b39330,0x24b4a3a6,0xbad03605, 0xcdd70693,0x54de5729,0x23d967bf,0xb3667a2e,0xc4614ab8, 0x5d681b02,0x2a6f2b94,0xb40bbe37,0xc30c8ea1,0x5a05df1b, 0x2d02ef8d ); var _UID=0;  var _UTZ=(-1*_DTE.getTimezoneOffset())+720; var _UCS=(_gc(_sc("TC0",1,DM_CHN,"/",0,0))==1?1:0)+(_gc(_sc("TC1",1,DM_CHN,"/",1,0))==1?2:0); var _URID=Math.floor(_DTE); var _USID=_sessID(); var _USEQ=0; var _CNV=""; function DM_tag(){ switch(DM_UIDS){ case 1: case 2: var cke=_gc(DM_UIDC); if(cke==null){ _UID=-1; }else if(cke.indexOf("/")>=0||cke.indexOf("?")>=0){ _UID=-1; }else{ _UID="DMID"+DM_UIDS+"="+escape(cke); } break; case 4: if ((_UID=_gc(DM_UIDN))==null){ _UID=_genID(); _sc(DM_UIDN,_UID,DM_UIDD,DM_UIDP,DM_UIDE,0); _UID="DMID4="+_UID; } break; } for(var i=0;i<_evts.length;i++){ _addNV("DM_EVT."+_evts[i].name,_evts[i].props); } _addNV("DM_LOC",_encd(_UDC.location.toString(),_BCL1,0)); _addNV("DM_REF",_encd(_UDC.referrer.toString(),_BCL1,0)); (_UID!=0&&_UID!=-1?_addNV("DM_HID",_encd(_UID,_BCL1,0)):0); _pack(_CNV); } function _pack(d){ var bse="",hdr="",dat="",SEQ=1; var prt=location.protocol+"//"; var svr=DM_PIX; var msl=(DM_PIX.length>DM_BPIX.length?DM_PIX.length:DM_BPIX.length); var mrl=2000,usd=0; d=_encd(d,_GCL2,1); for(var shpd=0,f=1;shpd<d.length;shpd+=dat.length,f++){ SEQ=_seq(); hdr="/"+DM_CSID+"/"+DM_TGID+"/"+_UCS+"/"+DM_UIDS+"/"+_UTZ+"/"+SEQ+"/"+_USID+"/"+_URID+"/"+_UID+"/"; bse="/"+Math.floor(Math.random()*Math.pow(10,9))+".gif?D="; lst=(shpd+(mrl-msl-(prt+hdr+bse).length-13)>d.length?1:0); if(f==1&&lst==0){ sts=1; }else if(f>1&&lst==0){ sts=2; }else if(f>1&&lst==1){ sts=3; }else{ sts=0; } hdr+=sts+"/"; usd=(prt+hdr+bse).length+msl+11; dat=d.substr(shpd,(mrl-usd-(d.charAt(shpd+(mrl-usd-1))=='%'?1:(d.charAt(shpd+(mrl-usd-2))=='%'?2:0)))); hdr+=_crc32(dat); _ship(_URID+SEQ,prt,svr,hdr,bse,dat,0); }  } function _ship(srl,p,s,h,b,d,t){ if(_sImg[srl]==null){ _sImg[srl]=new Image(2,3); } if (t<5){ _sImg[srl].src=p+s+h+b+d; }else if(t<10){ _sImg[srl].src=p+DM_BPIX+h+b+d; } _sImg[srl].onerror=function(){setTimeout("_ship('"+srl+"','"+p+"','"+s+"','"+h+"','"+b+"','"+d+"',"+(t+1)+")",1000);}; } function _addNV(n,v){ _CNV+=(_CNV?"&":"")+n+"="+v; } function _genID(){ return Math.floor(_DTE) +"-"+Math.floor(Math.random()*Math.pow(10,16)) +"-"+_crc32("".concat(_UDC.referrer,_UDC.cookie,_UNV.userAgent,_UTZ,screen.width,screen.height)); } function _sessID(){ var sID=_gc("DMSID"); if(sID==null){sID=_gc(_sc("DMSID",_genID(),DM_UIDD,DM_UIDP,0,0));} return(sID);  } function _seq(){ if(_USEQ==0){ if(_gc("DMSEQ")!=null){ _USEQ=_gc("DMSEQ"); } } _sc("DMSEQ",++_USEQ,DM_UIDD,DM_UIDP,0,1); return(_USEQ); }function _sc(n,v,d,p,e,o){ var _CDTE=new Date(); if((n!=""&&v!="")&&(_gc(n)==null||o==1)){ _CDTE.setDate(_DTE.getDate()+e); _UDC.cookie=n+"="+v+(p!=""?";path="+p:"")+(d!=""?";domain="+d:"")+(e>0?";expires="+_CDTE.toGMTString():""); } return n; } function _gc(n){ var co=_UDC.cookie; var pos=co.indexOf(n+"="); return pos!=-1?co.substring(pos+n.length+1,(co.indexOf("; ",pos)!=-1?co.indexOf("; ",pos):co.length)):null; }function _encd(s,chrs,b){ for(var i=0,ns="",c="";i<s.length;i++){ if((b==1?chrs.indexOf(s.charAt(i))>=0:chrs.indexOf(s.charAt(i))<0)){ ns+=s.charAt(i); }else{ if((c=_CHR.indexOf(s.charAt(i)))>0) ns+="%"+(c<16?0:"")+_hexd[c]; } } return ns; } function _crc32(buf){ i=0; cnt=buf.length; crc=0xFFFFFFFF; while(cnt-- != 0) crc=_CRCTbl[(crc^_CHR.indexOf(buf.charAt(i++)))&0xFF]^(crc>>>8); crc^=0xFFFFFFFF;  crc=(crc&0x7FFFFFFF)+((crc<0)?0x80000000:0); return crc; } function DM_event(e,n,v){for(var i=0;i<_evts.length;i++){if(_evts[i].name==e){if(_evts[i].props.indexOf("("+_encd(n,_BCL1,0)+".")<0){_evts[i].props+="("+_encd(n,_BCL1,0)+"."+_encd(v,_BCL1,0)+")";return 1;}else{return 0;}}}_evts[_evts.length]={name:_encd(e,_BCL1,0),props:"("+_encd(n,_BCL1,0)+"."+_encd(v,_BCL1,0)+")"};return 1;}function DM_cat(cat){_addNV("DM_CAT",_encd(cat,_BCL1,0))}