Ένταση Ανέμου

Ως κατεύθυνση ανέμου θεωρείται η διεύθυνση από την οποία πνέει ο άνεμος και ως ένταση του ανέμου θεωρείται το μέτρο της ταχύτητας του ανέμου. Η ένταση του ανέμου μπορεί να μετρηθεί με διάφορες εμπειρικές και αριθμητικές κλίμακες. Μια ευρέως διαδεδομένη εμπειρική κλίμακα είναι η κλίμακα Beaufort, ενώ αριθμητικές κλίμακες είναι τα m/s, km/h και οι κόμβοι. Στοv ακόλουθο πίνακα δίνεται η αντιστοιχία της κλίμακας Beaufort με τα m/s, τα km/h και τους κόμβους.

123.jpg
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    var j=0;
    while (InArray.length > ReduceToSize){
        ItemToDump = Math.floor(InArray.length*Math.random());
        InArray.splice(ItemToDump, 1);
    }
}
 
function Shuffle(InArray){
    var Num;
    var Temp = new Array();
    var Len = InArray.length;
 
    var j = Len;
 
    for (var i=0; i<Len; i++){
        Temp[i] = InArray[i];
    }
 
    for (i=0; i<Len; i++){
        Num = Math.floor(j  *  Math.random());
        InArray[i] = Temp[Num];
 
        for (var k=Num; k < (j-1); k++) {
            Temp[k] = Temp[k+1];
        }
        j--;
    }
    return InArray;
}
 
function WriteToInstructions(Feedback) {
    document.getElementById('InstructionsDiv').innerHTML = Feedback;
 
}
 
function EscapeDoubleQuotes(InString){
    return InString.replace(/"/g, '&quot;')
}
 
function TrimString(InString){
        var x = 0;
 
        if (InString.length != 0) {
                while ((InString.charAt(InString.length - 1) == '\u0020') || (InString.charAt(InString.length - 1) == '\u000A') || (InString.charAt(InString.length - 1) == '\u000D')){
                        InString = InString.substring(0, InString.length - 1)
                }
 
                while ((InString.charAt(0) == '\u0020') || (InString.charAt(0) == '\u000A') || (InString.charAt(0) == '\u000D')){
                        InString = InString.substring(1, InString.length)
                }
 
                while (InString.indexOf('  ') != -1) {
                        x = InString.indexOf('  ')
                        InString = InString.substring(0, x) + InString.substring(x+1, InString.length)
                 }
 
                return InString;
        }
 
        else {
                return '';
        }
}
 
function FindLongest(InArray){
    if (InArray.length < 1){return -1;}
 
    var Longest = 0;
    for (var i=1; i<InArray.length; i++){
        if (InArray[i].length > InArray[Longest].length){
            Longest = i;
        }
    }
    return Longest;
}
 
//UNICODE CHARACTER FUNCTIONS
function IsCombiningDiacritic(CharNum){
    var Result = (((CharNum >= 0x0300)&&(CharNum <= 0x370))||((CharNum >= 0x20d0)&&(CharNum <= 0x20ff)));
    Result = Result || (((CharNum >= 0x3099)&&(CharNum <= 0x309a))||((CharNum >= 0xfe20)&&(CharNum <= 0xfe23)));
    return Result;
}
 
function IsCJK(CharNum){
    return ((CharNum >= 0x3000)&&(CharNum < 0xd800));
}
 
//SETUP FUNCTIONS
//BROWSER WILL REFILL TEXT BOXES FROM CACHE IF NOT PREVENTED
function ClearTextBoxes(){
    var NList = document.getElementsByTagName('input');
    for (var i=0; i<NList.length; i++){
        if ((NList[i].id.indexOf('Guess') > -1)||(NList[i].id.indexOf('Gap') > -1)){
            NList[i].value = '';
        }
        if (NList[i].id.indexOf('Chk') > -1){
            NList[i].checked = '';
        }
    }
}
 
//EXTENSION TO ARRAY OBJECT
function Array_IndexOf(Input){
    var Result = -1;
    for (var i=0; i<this.length; i++){
        if (this[i] == Input){
            Result = i;
        }
    }
    return Result;
}
Array.prototype.indexOf = Array_IndexOf;
 
//IE HAS RENDERING BUG WITH BOTTOM NAVBAR
function RemoveBottomNavBarForIE(){
    if ((C.ie)&&(document.getElementById('Reading') != null)){
        if (document.getElementById('BottomNavBar') != null){
            document.getElementById('TheBody').removeChild(document.getElementById('BottomNavBar'));
        }
    }
}
 
//HOTPOTNET-RELATED CODE
 
var HPNStartTime = (new Date()).getTime();
var SubmissionTimeout = 30000;
var Detail = ''; //Global that is used to submit tracking data
 
function Finish(){
//If there's a form, fill it out and submit it
    if (document.store != null){
        Frm = document.store;
        Frm.starttime.value = HPNStartTime;
        Frm.endtime.value = (new Date()).getTime();
        Frm.mark.value = Score;
        Frm.detail.value = Detail;
        Frm.submit();
    }
}
 
//JMATCH CORE JAVASCRIPT CODE
 
var CorrectIndicator = ':-)';
var IncorrectIndicator = 'X';
var YourScoreIs = 'Your score is ';
var CorrectResponse = 'Correct! Well done.';
var IncorrectResponse = 'Sorry! Try again. Incorrect matches have been removed.';
var TotalUnfixedLeftItems = 0;
var TotCorrectChoices = 0;
var Penalties = 0;
var Finished = false;
var TimeOver = false;
 
var Score = 0;
var Locked = false;
var ShuffleQs = false;
var QsToShow = 6;
 
function StartUp(){
    RemoveBottomNavBarForIE();
 
    SetUpItems(ShuffleQs,QsToShow);
 
    TotalUnfixedLeftItems = document.getElementById('MatchDiv').getElementsByTagName('select').length;
 
//Create arrays
    CreateStatusArrays();
 
}
 
Status = new Array();
 
function CreateStatusArrays(){
    var Selects = document.getElementById('Questions').getElementsByTagName('select');
    for (var x=0; x<Selects.length; x++){
        Status[x] = new Array();
        Status[x][0] = 0; // Item not matched correctly yet
        Status[x][1] = 0; //Tries at this item so far
        Status[x][2] = Selects[x].id; //Store a ref to the original drop-down
        Status[x][3] = new Array(); //Sequence of guesses for this item
    }
}
 
function GetKeyFromSelectContainer(Container){
    var Result = -1;
    if (Container.getElementsByTagName('select').length > 0){
        var Select = Container.getElementsByTagName('select')[0];
        if (Select != null){
            Result = parseInt(Select.id.substring(1, Select.id.length));
        }
    }
    return Result;
}
 
function GetKeyFromSelect(Select){
    var Result = -1;
    if (Select != null){
        Result = parseInt(Select.id.substring(1, Select.id.length));
    }
    return Result;
}
 
var OriginalKeys = new Array();
var ReducedKeys = new Array();
 
function GetUniqueKeys(Container, TargetArray){
    TargetArray.length = 0;
    var x = -1;
    var SList = Container.getElementsByTagName('select');
    if (SList.length > 0){
        for (var i=0; i<SList.length; i++){
            x = GetKeyFromSelect(SList[i]);
            if (TargetArray.indexOf(x) < 0){
                TargetArray.push(x);
            }
        }
    }
}
 
function SetUpItems(ShuffleQs, ReduceTo){
    var QList = new Array();
    var i, j, k, Selects, Options;
 
//Remove all the table rows and put them in an array for processing
    var Qs = document.getElementById('Questions');
 
//First, get a list of keys
    GetUniqueKeys(Qs, OriginalKeys);
 
//Remove the table rows to an array
    while (Qs.getElementsByTagName('tr').length > 0){
        QList.push(Qs.removeChild(Qs.getElementsByTagName('tr')[0]));
    }
 
    var Reducing = (QList.length > ReduceTo);
 
//If required, select random rows to delete
    if (Reducing == true){
        var DumpItem = 0;
        while (ReduceTo < QList.length){
 
//Get a number to delete from the array
            DumpItem = Math.floor(QList.length*Math.random());
            for (i=DumpItem; i<(QList.length-1); i++){
                QList[i] = QList[i+1];
            }
            QList.length = QList.length-1;
        }
    }
//Shuffle the rows if necessary
    if (ShuffleQs == true){
        QList = Shuffle(QList);
    }
 
    TotalUnfixedLeftItems = QList.length;
 
//Write the rows back to the table body
    for (i=0; i<QList.length; i++){
        Qs.appendChild(QList[i]);
    }
 
//Now we need to remove any drop-down options that no longer have associated select items
    if (Reducing == true){
        GetUniqueKeys(Qs, ReducedKeys);
 
        Selects = Qs.getElementsByTagName('select');
        for (i=0; i<Selects.length; i++){
            Options = Selects[i].getElementsByTagName('option');
            for (j=Options.length-1; j>=0; j--){
                if (OptionRequired(Options[j].value) == false){
                    Selects[i].removeChild(Options[j]);
                }
            }
        }
    }
}
 
function OptionRequired(Key){
    if (ReducedKeys.indexOf(Key) > -1){
        return true;
    }
    else{
        if (OriginalKeys.indexOf(Key) > -1){
            return false;
        }
        else{
            return true;
        }
    }
}
 
function CheckAnswers(){
    if (Locked == true){return;}
    var Select = null;
    var Key = -1;
    var Parent = null;
    var Answer = null;
    var AnsText = '';
    var AllDone = true;
    TotCorrectChoices = 0;
 
//for each item not fixed or a distractor
    for (var i=0; i<Status.length; i++){
 
//if it hasn't been answered correctly yet
        if (Status[i][0] < 1){
 
//Add one to the number of tries for this item
            Status[i][1]++;
 
//Get a pointer to the drop-down
            Select = document.getElementById(Status[i][2]);
            Key = GetKeyFromSelect(Select);
//Save the answer given
            Status[i][3].push(Select.options[Select.selectedIndex].value);
 
//Check the answer
            if (Select.options[Select.selectedIndex].value == Key){
                    Status[i][0] = 1;
                    AnsText = Select.options[Select.selectedIndex].innerHTML;
                    Parent = Select.parentNode;
                    Parent.removeChild(Select);
                    Parent.innerHTML = AnsText;
                    Parent.nextSibling.innerHTML = CorrectIndicator;
            } 
            else{
                AllDone = false;
                Parent = Select.parentNode;
                Parent.nextSibling.innerHTML = IncorrectIndicator;
            }
        }
        else{
//Add a copy of the last (correct) answer.
            Status[i][3].push(Status[i][3][Status[i][3].length-1]);
        }
//If it's correct, count it
        if (Status[i][0] == 1){
            TotCorrectChoices++;
        }
    }
//Calculate the score
    Score = Math.floor(((TotCorrectChoices-Penalties)/TotalUnfixedLeftItems)*100);
    if (Score<0){Score = 0;}
    var Feedback = '';
 
//Build the feedback
    if (AllDone == true){
        Feedback = YourScoreIs + ' ' + Score + '%.' + '<br />' + CorrectResponse;
    }
    else{
        Feedback = YourScoreIs + ' ' + Score + '%.' + '<br />' + IncorrectResponse;
//Penalty for incorrect check
        Penalties++;
    }
 
//If the exercise is over, deal with that
    if ((AllDone == true)||(TimeOver == true)){
 
        TimeOver = true;
        Locked = true;
        Finished = true;
        setTimeout('Finish()', SubmissionTimeout);
        WriteToInstructions(Feedback);
    }
 
//Show the feedback
    ShowMessage(Feedback);
 
}
 
//-->
 
//]]>
 
</script>
 
</head>
 
<body onload="StartUp()" id="TheBody" >
 
<!-- BeginTopNavButtons -->
 
<div class="NavButtonBar" id="TopNavBar">
 
<button class="NavButton" onfocus="NavBtnOver(this)" onblur="NavBtnOut(this)"  onmouseover="NavBtnOver(this)" onmouseout="NavBtnOut(this)" onmousedown="NavBtnDown(this)" onmouseup="NavBtnOut(this)" onclick="location='contents.htm'; return false;"> Index </button>
 
<button class="NavButton" onfocus="NavBtnOver(this)" onblur="NavBtnOut(this)" onmouseover="NavBtnOver(this)" onmouseout="NavBtnOut(this)" onmousedown="NavBtnDown(this)" onmouseup="NavBtnOut(this)" onclick="location='nextpage.htm'; return false;">=&gt;</button>
 
</div>
 
<!-- EndTopNavButtons -->
 
<div class="Titles">
    <h2 class="ExerciseTitle">&#x03A4;&#x03B1;&#x03B9;&#x03C1;&#x03B9;&#x03AC;&#x03BE;&#x03C4;&#x03B5; &#x03C4;&#x03B7;&#x03BD; &#x03AD;&#x03BD;&#x03C4;&#x03B1;&#x03C3;&#x03B7; &#x03C4;&#x03BF;&#x03C5; &#x03B1;&#x03BD;&#x03AD;&#x03BC;&#x03BF;&#x03C5; (&#x03C3;&#x03B5; Beaufort) &#x03BC;&#x03B5; &#x03C4;&#x03BF; &#x03CD;&#x03C8;&#x03BF;&#x03C2; &#x03C4;&#x03C9;&#x03BD; &#x03BA;&#x03C5;&#x03BC;&#x03AC;&#x03C4;&#x03C9;&#x03BD; (&#x03C3;&#x03B5; m) &#x03C0;&#x03BF;&#x03C5; &#x03C0;&#x03C1;&#x03BF;&#x03BA;&#x03B1;&#x03BB;&#x03B5;&#x03AF;.<br />&#x039D;&#x03B1; &#x03C3;&#x03C5;&#x03BC;&#x03B2;&#x03BF;&#x03C5;&#x03BB;&#x03B5;&#x03C5;&#x03C4;&#x03B5;&#x03AF;&#x03C4;&#x03B5; &#x03C4;&#x03BF;&#x03BD; &#x03C0;&#x03AF;&#x03BD;&#x03B1;&#x03BA;&#x03B1; &#x03B3;&#x03B9;&#x03B1; &#x03BD;&#x03B1; &#x03BB;&#x03CD;&#x03C3;&#x03B5;&#x03C4;&#x03B5; &#x03C4;&#x03B7;&#x03BD; &#x03AC;&#x03C3;&#x03BA;&#x03B7;&#x03C3;&#x03B7;!<br /></h2>
 
    <h3 class="ExerciseSubtitle">Matching exercise</h3>
 
</div>
 
<div id="InstructionsDiv" class="StdDiv">
    <div id="Instructions">Match the items on the right to the items on the left.</div>
</div>
 
<div id="MainDiv" class="StdDiv">
 
<button id="CheckButton1" class="FuncButton" onmouseover="FuncBtnOver(this)" onfocus="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onblur="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" onclick="CheckAnswers()">&nbsp;Check&nbsp;</button>
 
<div id="MatchDiv" style="text-align: center;">
 
<form id="QForm" method="post" action="" onsubmit="return false;">
<table border="0" style="margin: 2em auto 2em auto;"><tbody id="Questions">
 
<tr><td class="LeftItem">8 Beaufort</td><td class="RightItem"><select id="s0_0"><option value="x">???</option>
<option value="1">3,3</option>
<option value="0">5,5m</option>
<option value="3">13,1</option>
<option value="2">46m</option>
<option value="4">2m</option>
<option value="5">29,5m</option>
</select></td><td></td></tr><tr><td class="LeftItem">4 Beaufort</td><td class="RightItem"><select id="s1_1"><option value="x">???</option>
<option value="1">3,3</option>
<option value="0">5,5m</option>
<option value="3">13,1</option>
<option value="2">46m</option>
<option value="4">2m</option>
<option value="5">29,5m</option>
</select></td><td></td></tr><tr><td class="LeftItem">12 Beaufort</td><td class="RightItem"><select id="s2_2"><option value="x">???</option>
<option value="1">3,3</option>
<option value="0">5,5m</option>
<option value="3">13,1</option>
<option value="2">46m</option>
<option value="4">2m</option>
<option value="5">29,5m</option>
</select></td><td></td></tr><tr><td class="LeftItem">7 Beaufort</td><td class="RightItem"><select id="s3_3"><option value="x">???</option>
<option value="1">3,3</option>
<option value="0">5,5m</option>
<option value="3">13,1</option>
<option value="2">46m</option>
<option value="4">2m</option>
<option value="5">29,5m</option>
</select></td><td></td></tr><tr><td class="LeftItem">3 Beaufort</td><td class="RightItem"><select id="s4_4"><option value="x">???</option>
<option value="1">3,3</option>
<option value="0">5,5m</option>
<option value="3">13,1</option>
<option value="2">46m</option>
<option value="4">2m</option>
<option value="5">29,5m</option>
</select></td><td></td></tr><tr><td class="LeftItem">10 Beaufort</td><td class="RightItem"><select id="s5_5"><option value="x">???</option>
<option value="1">3,3</option>
<option value="0">5,5m</option>
<option value="3">13,1</option>
<option value="2">46m</option>
<option value="4">2m</option>
<option value="5">29,5m</option>
</select></td><td></td></tr>
 
</tbody></table>
</form>
</div>
 
<button id="CheckButton2" class="FuncButton" onmouseover="FuncBtnOver(this)" onfocus="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onblur="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" onclick="CheckAnswers()">&nbsp;Check&nbsp;</button>
 
</div>
 
<div class="Feedback" id="FeedbackDiv">
<div class="FeedbackText" id="FeedbackContent"></div>
<button id="FeedbackOKButton" class="FuncButton" onfocus="FuncBtnOver(this)" onblur="FuncBtnOut(this)" onmouseover="FuncBtnOver(this)" onmouseout="FuncBtnOut(this)" onmousedown="FuncBtnDown(this)" onmouseup="FuncBtnOut(this)" onclick="HideFeedback(); return false;">&nbsp;OK&nbsp;</button>
</div>
 
<!-- BeginBottomNavButtons -->
 
<div class="NavButtonBar" id="BottomNavBar">
 
<button class="NavButton" onfocus="NavBtnOver(this)" onblur="NavBtnOut(this)"  onmouseover="NavBtnOver(this)" onmouseout="NavBtnOut(this)" onmousedown="NavBtnDown(this)" onmouseup="NavBtnOut(this)" onclick="location='contents.htm'; return false;"> Index </button>
 
<button class="NavButton" onfocus="NavBtnOver(this)" onblur="NavBtnOut(this)" onmouseover="NavBtnOver(this)" onmouseout="NavBtnOut(this)" onmousedown="NavBtnDown(this)" onmouseup="NavBtnOut(this)" onclick="location='nextpage.htm'; return false;">=&gt;</button>
 
</div>
 
<!-- EndBottomNavButtons -->
 
<!-- BeginSubmissionForm -->
 
<!-- EndSubmissionForm -->
 
</body>
 
</html>

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