TapSacraments

15 Feb 2008 13:54 by Rick

I know I am straying on to dangerous ground here as there are many that know much more about this subject than I do, but I have been asked what they are and could find no good cross-denominational reference.

A sacrament (literal meaning “a sacred thing or mystery”) is the symbolic act or ritual that the church uses to outwardly express and practice the faith. There are seven that are commonly practised by Catholic and Orthodox traditions and most Protestant churches (except perhaps the Salvation Army and the Society of Friends) accept the first two even if they don’t use the word. I am not entirely sure why, in the case of the Church of England, some are accepted and others not even though we adopt most of the practices, but I suspect that it is more than mere terminology.

Baptism (or Christening)

This is the rite of initiation into the church as originally practised by John the Baptist using water (John 3:22–24). In the Anglican (Church of England), Catholic, Orthodox and some other churches this can be as an infant where the vows are made on their behalf or they can be made in person if the candidate is old enough. In some protestant denominations this is called the “Believer’s Baptism” and is only available to those who can declare for themselves.

Eucharist (Holy Communion, Mass or The Lord’s Supper)

This is the regular ceremony where Christians re-enact the “Last Supper” as commanded in the Gospels (e.g. Luke 22:14–20). At the Eucharist the consecrated bread and wine are sometimes referred to as the “Blessed Sacraments”, particularly if some is kept for later use (known as the “Reserved Sacrament”).

Confirmation

An infant who has been baptised later confirms their faith for themselves in this public act before their Bishop. In different traditions this can take place either before or after they receive their first communion. Although practised by the Church of England, it is not regarded as a Sacrament.

Matrimony (Marriage)

Although Protestant churches practice marriage in Church, it is not seen as a Sacrament yet it doesn’t lessen their view of marriage as having been given and blessed by God.

Ordination

A person who wishes (with a “Vocation” or “Calling”) to formalise their ministry in the church, both pastorally and in preaching, may go to their Bishop who, after suitable training, may ordain them, first as “Deacon” (servant to the church) and (perhaps) later as “Priest.” In many denominations, only the latter can preside at a celebration of the Communion. Particularly worthy priests may later be “Consecrated” as Bishops, though this is not a sacrament.

Penance (Confession or Reconciliation)

Unlike the other sacraments, this is very much a personal affair between the penitent and God, often with the assistance of a confessor or priest. Practice varies from a routine attendance at a confessional some time before Mass to an occasional and prayerful confession and renewal or baptismal vows in time of need.

Extreme Unction (Anointing the Sick or Last Rites)

Adopted from the passage James 5:14-15 “Any one of you who is ill should send for the elders of the church…” the Sacrament offers the grace of the Holy Spirit to overcome anxiety at times of weakness. Sometimes a similar anointing is available to all-comers at festivals, particularly (with ashes) at the start of Lent and (with oil) on Easter Eve.

A Catholic view of the sacraments can be found here and here

This schools page demonstrates all that is wrong with religious education.

TapWords on the air

14 Feb 2008 09:28 by Rick

This is a problem a colleague at work came across with a home machine. His wife said that suddenly strange words started appearing on the screen. Suspecting some virus she disconnected the network immediately and called her husband. When he tried to use a bootable Linux CD to investigate the problem he had trouble closing down because windows were being selected randomly. Resorting to the kill button (hold down the power button for a while) he rebooted but strange words started to appear during the boot sequence as well.

What is your diagnosis?

He first suspected a BIOS virus but those haven’t been seen since the late ’90s. Then he spotted that one of the words showing up was the name of a neighbour’s child. Light dawns! A chat with the neighbour revealed that they had just replaced the battery in their wireless keyboard and the extra power must have been sufficient to be picked up by the identical receiver on his wife’s PC.

The implications are left as an exercise for the reader.

Thanks to Frank and his (internal) blog for the details.

TapDoes your website *all* belong to you?

12 Feb 2008 14:13 by Rick

When we build web sites we don’t necessarily create all the content ourselves. For various reasons we might subcontract out parts of it to third parties. Some examples are banner advertising and external widgets such as page counters and other statistics. In each case the code we insert on behalf of the third party pulls in content from their web servers and we have little control over it.

Now you might imagine that the big advertising company that you are signed up with have their reputation to consider and would only serve you good banners but it is not as simple as that. They sell on advertising space (syndicate) to other companies. The person visiting your site may be in another country; the code can tell that and will adjust the response accordingly; that is called geo-targeting. Now the agency doesn’t necessarily have material for that country so they contract out to yet another company to do it for them. This can happen many times before the advert is delivered, sometimes on a geographical basis, sometimes on a share arrangement—all without you knowing anything about it. You trusted the original supplier, and they trusted their subcontractor but it is getting a bit thin by the time the eventual supplier is reached and it is not uncommon for that one to be sending a virus or spy-ware to your customer. Yes, they are still your customer and will hold you responsible for what happens.

The other example I suggested was page counters, they are useless but small site owners still seem to like them. There used to be hundreds of different ones around but I haven’t looked recently. Some of these go out of business or get bought out without you knowing. The web address may have lapsed and been snapped up by someone else. This new owner could be using it for anything—including sending mal-ware to your visitors. When was the last time you looked at that page counter? Is it still doing what you though it was?

There are two good, but rather technical, reports linked to from this Google Blog that you should read if you think you may be affected by this.

TapNot only “The Jazz” but “Planet Rock” to go

10:01 by Rick

The announcement by the corporate suits describes them as “non core brands.” What on earth does than mean when they are in the radio business; what they mean is that there is not enough profit. I think they are very mistaken; DAB Radio is only just beginning to take off in a big way so they need to hang on for a bit. It takes a while for the market to go from niche to mainstream and, as portable radios die, they will be replaced by DAB now the price is right—that is unless all the broadcasters pull out.

And this is only one day after I managed to figure out how to stream “Planet Rock” to my music player. These stations don’t make it easy by not publishing their stream addresses; whizzy popup javascript windows are no good at all, nor is proprietary real-player format. Planet Rock is http://mediasrv-the.musicradio.com/PlanetRock if you need to know.

I had never heard of “The Jazz” but would have listened if I knew that a decent Jazz station existed, I tried “Jazz FM” a while ago but that was feeble; perhaps I will have to give it another try.

TapSharia

8 Feb 2008 10:03 by Rick

I have only this to say to those who are criticising Dr. Rowan Williams for apparently advocating that Sharia Law be adopted in the UK; Read the lecture and the interview transcript. If you can’t be bothered to do either, and the former at least is not easy as it was intended for an audience of academic and legal minds, then for goodness sake, read a commentary written by someone who has.

Some extracts from the lecture…

…there are large questions in the background about what we understand by and expect from the law, questions that are more sharply focused than ever in a largely secular social environment. I shall therefore be concentrating on certain issues around Islamic law to begin with, in order to open up some of these wider matters.

This lecture will not attempt a detailed discussion of the nature of sharia, which would be far beyond my competence; my aim is only, as I have said, to tease out some of the broader issues around the rights of religious groups within a secular state, with a few thought[s] about what might be entailed in crafting a just and constructive relationship between Islamic law and the statutory law of the United Kingdom.

TapIn-ger-land

7 Feb 2008 08:38 by Rick

Disclaimer: I know nothing about football, or any other sport for that matter.

Judging only from snippets of news reports overheard, I understand that the manager of a football team (probably better described as head coach) is very important to the success of the team. This is to the extent that if a team performs badly, it is the manager that gets the boot on the grounds that he didn’t pick a good enough team to do the job or train them well enough.

If that is the case, why is it that the same nationality rules don’t apply to the manager and the rest of the coaching staff as they do for the players themselves?

TapWordPress update 2.3.3

6 Feb 2008 23:20 by Rick

This came out yesterday as an emergency patch for a vulnerability. I wouldn’t normally write about it here but, for some reason, they didn’t publish the list of changed files. So here they are:—

xmlrpc.php
wp-content\plugins\akismet.php
wp-admin\install-helper.php
wp-includes\version.php
wp-includes\gettext.php
wp-includes\pluggable.php

It is the first one that is important.

TapVirgin Traffic Management

29 Jan 2008 11:55 by Rick

I’m a bit behind on this news but it shows how good Virgin are at keeping their customers informed about what is going on. They have now come clean about how they manage traffic for their heaviest users. I have checked the Acceptable Usage Policy and Terms of Service again and nothing has changed there so I still don’t think it is justified, but at least we now know what is being done. It seems that on the (L) package I am allowed a maximum of 800MB down or 325MB up between 4pm and 9pm. But some things do get better:—I see that I am now only paying £16 for the service which was £25 and it has just been announced that they are to uprate it to 10Mbps (and 512Kbps up) some time soon.

I don’t think that I am likely to hit the limits but I now wonder how I can monitor my usage—somehow I need to watch traffic through my router as there are multiple machines using it. The 800MB limit amounts to only an average of about 350Kbps over the 5 hours. It would be quite easy to exceed that with a torrent running and even easier to exceed the upload margin.

Update: Virgin media is a strange organisation. When I checked my account I found that I was still being charged £25. The Customer Care desk didn’t know anything about the £16 price so they forwarded me to customer relations. They checked the web site, consulted the supervisor and said—”That’s fine, we will apply it to your account straight away.” Not just the £16 per month but the £11.50 for the first year special offer, and a rebate on the month just paid in advance as well. I suppose that because they are over charging the many people that don’t know about it they can afford to be generous! The only small catch is that a 12 month contract starts again but at that price I am not at all bothered.

TapAnti-social Wi-Fi

24 Jan 2008 13:33 by Rick

Wi-Fi is governed by the IEEE 802.11 standards set. The best known of these are 802.11b with a maximum raw speed of 11 Mbps and 802.11g allowing a maximum of 54 Mbps both with a nominal indoor range of 38m.

The frequency range (2.400–2.485 GHz) is divided into 13 x 22 MHz channels but spaced only 5 MHz apart and attenuating to -30dB at their edges. Regulations only permit the first 11 to be used in the Americas and some European countries e.g. France and Spain, are even more restrictive, but most allow all 13.

Interference causing reduced throughput can be minimised by carefully choosing which channels to use, avoiding clashes with neighbouring networks and also outside interference from other users of the frequency band such as Bluetooth, cordless phones, microwave ovens and remote controls.

A consequence of the oversize bands compared to their separation is that neighbouring networks have to be 4 or 5 channels apart to avoid interfering with each other. For example, Channel 6 covers 2426–2448 MHz to -30dB which just touches the edges of Channel 2 which reaches up to 2428 MHz and Channel 10 which reaches down to 2446 MHz. With only 11 channels available, these limitations mean that in practice only channels 1, 6 and 11 are usable with a little adjustment available to avoid other strong broadcasters (though it would require specialised equipment or a lot of trial and error to achieve that).

In theory, in the UK, four useful bands could be achieved—1, 5, 9 and 13— but in practice too many people know about the US limitation and (some equipment comes preset) to get this to work without mutual local agreement. One of my devices only allows 1, 6 or 11 to be set in any case. As wireless networks get more popular, finding a free channel to use gets more difficult but, unless you are working in a very dense environment, it should still be possible to find a working combination.

There is a proposed new standard, 802.11n, which has not yet received approval (and won’t until at least the end of this year), and offers a raw speed of 248Mbps+ and a 70m indoor range. It achieves this by using a facility called Multiple Input Multiple Output (MIMO) which uses multiple aerials and a wider 40MHz bandwidth (channel bonding). This effectively uses most of the 2.4 GHz band in one fell swoop, blotting out everything else within range.

In theory, the channel bonding is optional and the standard requires the stations to detect activity on neighbouring frequencies and to moderate its use accordingly but new “pre standard” devices (called pre-N, draft-N, Extreme, RangeMax, Turbo, Super-g etc.) have appeared (technical article) and been heavily marketed for a couple of years which don’t necessarily conform to all (or any) of the features. For example, the draft standard allows for the use of the 5GHz frequency band, but in order to retain downward compatibility with b and g type devices, most of the equipment produced does not use it unless specially configured (if at all). They also tend to come pre-configured for maximum speed and the onus is on the user to change that, which is unlikely because that is why they paid for it in the first place. In many cases, users of this equipment have only one item (usually the router) to this standard with the remainder operating at the g level so the benefit is lost anyway. Devices from different manufacturers frequently do not interoperate, certainly not to their full specification.

But for must domestic purposes, why would you need this speed. The original type b system exceeds the speed of most broadband connections. If you have a local server or communicate locally between machines then the speed of the g system may be useful but for any bulk data transfer, like a backup for instance, it would be much better performed using a wired connection.

Note: The raw speed figures quoted for wireless transmission are absolutely worthless. Realistic figures, but under ideal conditions, are 6 Mbps for b, 23 Mbps for g and 90 Mbps for n.

TapDoubtful Which? Recommendation

23 Jan 2008 14:25 by Rick

The Feb 2008 issue of Which? Magazine (page 64) has a recommendation for the Sava Plug which, it is claimed, can “reduce the power a freezer uses by around 25 per cent and a fridge freezer by about 7 per cent”

This is a letter I sent to the magazine today:—

Dear Which,

I am surprised to see (Feb 2008, p64) that you recommend the Sava Plug. I have seen no independent technical review which justifies its claims. The company are cagey about how it actually works but it can be inferred that it does some Power Factor correction. This is an industrial technique which adjusts the apparent power usage (VA) to match the real power (Watts) by correcting the phase of the load. This is effective when the load is heavily inductive such as large electric motors. This is a good reference
http://en.wikipedia.org/wiki/Power_Factor_Correction

There are two problems with this in a domestic situation which make it near useless. First, the inductive load of a freezer or fridge is small compared to industrial use so little savings will be made. Secondly, and most importantly, domestic customers, unlike industrial users, are billed in KW Hours anyway so no correction of the power factor is going to make the slightest difference to them.

Yours faithfully

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