[Lindy Walton]

Hi. Yes, you are right, this matrix equation will not fit on a braille page without having to divide it. The first priority is to divide before the equals sign, as you have done.

I have attached a brf example for you which includes the following corrections:

• Starting the displayed matrix in cell 7 (it is displayed to 1-5 text--NC Sec.191.b.iv);
• Aligning "a" with "3" in the first matrix (items in the same column must begin in the same cell in a matrix) (NC Sec.183.a);
• Deleting the space before the plus symbol (operation symbols are generally unspaced--NC Sec.138.b);
• Deleting the second equals symbol (the equals symbol is transcribed on the top line of the arrangement, just as you have done with the plus symbol)(NC Sec.183.a).

Since some of the answer choices contain decimals, I would not terminate Nemeth Code until after subitem K. is completed unless, of course, Nemeth Code continues with item 27.

Hope this helps!

Lindy

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[Lindy Walton]

I am not familiar with the term "one word bridge". The single-word switch indicator was introduced in order to allow one narrative (UEB) word to come between technical material without having to terminate Nemeth Code.

For example, in "If x > y and y > z, is x > z?" the single-word switch indicator is used for the words "and" and "is". The Nemeth Code terminator is placed before the closing punctuation. I'm having trouble with the braille font, but here is the transcription in ascii:

,IF _% X .1 Y ,'& Y .1 Z, ,'IS
X .1 Z _:8

If words are actually part of the math expression, they are transcribed in Nemeth Code, without contractions. For example, in "miles/hour" the slash means "per" which requires a switch to Nemeth Code. The words "miles" and "hour" are part of the fraction. (ascii again):

_% MILES_/HOUR _:

The transcriber needs to determine whether words are part of the math or simply part of the sentence structure (UEB). Sometimes this can be tricky.

Lindy

[Lindy Walton]

Hi Susan. All of these words are not part of the math. Only the words done in Nemeth Code need to be uncontracted.

I have put the "math" words in boldface, below. I have also attached a transcription of these three bulleted items.

• Arithmetic sequence: nth term = Original Term + (n−1)d, where d is the constant difference between terms.
• Geometric sequence: nth term = Original Term × r⁽ⁿ⁻¹⁾, where r is the constant ratio.
• Group Formula: Total = Group 1 + Group 2 − Both + Neither

Let me know if I didn't understand your question.

Lindy

 

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[Lindy Walton]

The Braille Code for Chemical Notation 1997 is a Nemeth Code document. It expands on the Nemeth Code by giving symbols for chemical notation. It also has a few unique format rules. Electron dot notation is in the Chemistry Code (3.2.1, 4.1.5, and 4.3). The braille symbol (dots 16) represents the single electron dot (3.2.1). It is unspaced. See the attached brf file to see what the first two will look like in the sample you sent, using Nemeth in UEB contexts.

The reader will need to realize that (16) is an electron dot, not a multiplication dot or chemical period. Context should make it clear, just as it does in print where the same midline dot sign is used for all three purposes as well.

Lindy

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[Lindy Walton]

Hi Susan. Yes, this is an electron dot bond. Dots (16) are used to represent this sign. Its meaning will be inferred by the reader, just as in print a midline dot can mean different things.

Lindy

[Lindy Walton]

Sure, yes, it is your call of course but in the context of answer choices, some of which *require Nemeth and others which could be in either code, I think it is best to stay in Nemeth for all four answer choices in your example.

[Lindy Walton]

Ah, now I see the image you sent. These are valence arrows. The current chemistry code doesn't discuss these in detail and may suggest that they be drawn. Transcribers have come up with different solutions to this problem, and the BANA chemistry committee is working on a recommendation which you may use in your transcription. Describe the symbols in a TN. You may use just the < symbol for the up-pointing valence arrow and just the % symbol for the down-pointing valence arrow. These symbols are to be used only in the context of valence arrows depicted in orbital diagrams. It is not necessary to indicate that the arrowheads are barbed--this is just a print style.
In your book, the arrow pairs are grouped with underlining. Show the grouping by inserting one space between pairs. When only the up arrow appears, the general omission symbol of the Nemeth Code is used to show the absence of the down-pointing valence arrow within the pair. Place element SYMBOLS or orbital level notation as column headings, leaving only one space between columns. I have attached a suggested solution to your example. This should work nicely for you.

Lindy

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[Lindy Walton]

Hi Susan. I'm glad you found your answer before I could get back to you! Yes, a negative number or a minus sign with a numeral is considered to be a "modification" of the number and so is done in Nemeth Code. The four identifiers (A. B. C. D.) can also be done in Nemeth, keeping code switching to a minimum.

Lindy

[Lindy Walton]

Hi. I'm not finding the arrows in question. What page are they on?

The "new" chemistry code is still being written. I've been told that APH will produce a print copy of the current (1997) code on demand.  Please let me know if that is not the case. Thanks.

Lindy

[Lindy Walton]

Hi. I'm glad you asked this question. The colon sign in mathematics has seven different uses according to what I found on https://mathworld.wolfram.com/Colon.html
Your example, I believe, is item 3: "To give a name to a map, e.g., f:x|->x^2 (which is equivalent to the function notation f(x)=x^2)." In Lesson 4 of An Introduction to Braille Mathematics Using Nemeth Code within UEB Contexts (4.11.3 "Mapping Notation), it says to transcribe this colon as an unspaced symbol. In your example, this means ELI g PI colon x (Letter g is preceded by a space and followed by a punctuation mark, so it needs an ELI. Letter x is followed by a comparison sign so an ELI is not needed for x. A punctuation indicator is required before the colon.)

_% ;G_3X $O ?1/2#X+6 _:

[Lindy Walton]

Oh my goodness. It looks like I did actually activate the braille font. It didn't show up until I posted the note.

I'll still ask about the issue.

 

[Lindy Walton]

Hi. My response is in the attached file.

Regarding the braille font, I was told that the issue has been corrected. But I can't get it to work either. I'll look into it.

Thanks for continuing to challenge my thinking!

Lindy

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[Lindy Walton]

Thank you for finding that previous post from 2013! I was unfamiliar with the term "augmented matrix". I see now that the vertical line in an augmented matrix is not being used as a grouping sign, but rather as a separator. I think the best solution would be to draw the line as a tactile graphic, but if that option is not available to you, using the (456) "vertical line" makes sense. This is not the (1256) "vertical bar" (which has mathematical meaning). This "column separator" usage is similar to the vertical line used in a stem-and-leaf plot which became an option for us in the 2007 BANA Update. You'll note that there is a space before and after the vertical line when used in this manner. Let me know what you think.

Lindy

[Lindy Walton]

Hi Don. The vertical bar you are looking for is called an Enlarged Sign of Grouping in the Nemeth Code. You can find the enlarged single vertical bar listed in the table on page 123 of the 1972 codebook. Its use is illustrated in a determinant in example (2), Section 126, "Use of Enlarged Grouping Symbols".

Let me know if you have further questions. You have a big project ahead of you.

Lindy

[Lindy Walton]

Yes, that is correct. When following Nemeth Code formatting rules, the first line of a narrative paragraph is indented two cells from the runover margin. Section 190.a of the Nemeth Code says "paragraphs must begin in cell 3 and must be run over, if necessary, in cell 1." This is the correct placement for narrative that follows a cell-5 heading. Have fun with that glossary!

Lindy

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