Friday, October 30, 2015

Conquest and Defence, David Green Recounts the Hundred Years War from Every Perspective

Paul Fischer
10/30/2015
Charles Briggs


Conquest and Defence, David Green Recounts the Hundred Years War from Every Perspective


The role of the church can be easy to overlook in the defining national conflict between England and France which became, after broken peace treaties and ransoms, kidnappings, and massive slaughter, known as the 100 Years War, but this series of battles and intrigue is convincingly portrayed in The 100 Years War: A People’s History as a critically pivotal moment for the emerging Catholic Church. David Green is elusive in his use of a thesis in his book, which is structured as a generational analysis of various themes which are intended to coalesce into a final declaration of methodology and description. In order to review the intent of the research appropriately, it will be necessary to delineate between these themes and show in a concise manner how they are interrelated and in what basic construct they cast the evolution of Christendom into the true intercontinental empires which England, France, and other onlooking nations would become. Appearance of sourced material and the basic structure of the historical context in which the writing is based should then make itself quite apparent.
This is not to summarize the entirety of the material at hand, but instead to drive at the heart of what made this war pump, and the individual liberties which it extended to others. Firstly, the war was not one framed entirely around the concept of occupation, though by “the concluding years of Henry V’s reign what had been a war of raids and sieges became a war of occupation” (Green, 154), and the leaders on both sides of the English Channel, or for much of the war, in modern-day France, came to learn of the ineffectiveness of simple blockades or chevauchée raids. “As Jean Juvénal des Ursins noted in 1435, ‘For war is only made in order to have peace; make strong war and you will have peace by subjugating your enemies’” (92), this is an ironical statement as those raids had become a war of occupation, one which resounded culturally in Shakespearean literature and in the very threads of French nationalism, immortalized in primary sources artistic, carefully chosen for this historical work, and political. Indeed the nature of the French crown would change in this war: clambering to dislodge ineffective church leadership, the centralization of power and expansion of mercenary Patis forces redefined the fundamental belief of France in nationhood as “not only was victory or defeat an indication of divine judgement, but for many it might bring one decidedly closer to divine judgement of a very personal nature” (146). That which might have demolished French belief in their military capabilities instead became a varied system of mutual struggle, allowing an early separation of military and agricultural interests, not to overlook the many who were still pressed into service.
The progression being described here is quite delicate in nature. It is important to review the sources which are utilized in the book before expounding the grandeur of the impact of this war on later conflicts, such as the War of the Roses directly afterward in England or French absolutism in monarchy which developed following religious strife as conflicts in the Netherlands and other Spanish ambitions dominated. In this case, there is little doubt as to the professionalism of the work; primary sources are frequently cited and contemporary secondary sources consulted. Intermediary, or dependent, sources are appropriately dropped or their impact marginalized.
While the similarities between the various national mindsets are drawn again and again, it can be easy to forget that of the many allies who were involved in the war, “each had their own agendas and antipathies that required resolution” (86). In trajectory at least, it cannot be forgotten that there is nothing shared between Britain and France, least of all that corner of once barbarian then British and now French farms and fishing grounds, Calais. While an entire chapter is devoted to peace, and “by the later 14th century a social climate had developed in which calls for a diplomatic solution to the Hundred Years war resounded” (85), they did so at different times which was emblematized as “a welter of propaganda proclaimed the justice of each side’s cause” (234). Fighting for this piece of land not only drew starkly these differences, but emphasized them as “conceptions of royal power differed in England and France, certainly when the war began, and these differences grew as the struggle unfolded” (114). 
Without the ideation that the reformation was somehow sparked by this series of raids and occupation, or that it would have anywhere near as great an effect on absolutism and contemporary to the time, ideals of monarchy, the soundest of conclusions drawn from many premises proffered by this work is that the 100 Years War defined Britain as an island nation, and showed that France was able to continentally defend itself without crying to the Pope for a Holy Crusade, not to say that this was not attempted at some point; France became a nation and England would follow suit in coming centuries, though the latter would certainly take a slightly more wiley route, necessitating the survival of a pseudo-invasion by Spain and significant expansion of naval prowess. In other words it took a bit more than the high walled caravels and a simple speech by King Richard II to establish England as a major imperial power.

Friday, October 23, 2015

David Green: Bibliographical Synopsis

Paul Andreas Fischer
10/21/2015
Professor Briggs


David Green: Bibliographical Synopsis


David Green has written four books, which are published through Pearson PLC or subsidiary publishing companies. These are monographs which may be considered scholarly in nature, complete with indexes, acknowledgements, and appendices. His first book, however, proved difficult to find and was co-authored with two other authors, however, as a non-fiction work published by the University of Nottingham may also be considered a scholarly monograph, though it is short and is only 40 pages in length.
With eleven articles published, David Green has also contributed in a significant manner to ten academic journals which focus on his field of study. In addition, though this is not directly pertinent, he has written 22 encyclopedic entries for three different encyclopedias and two dictionaries. Historical review of his work, however, varies somewhat from his own account of what his work actually consists of.
The International Medieval Bibliography lists only seven publications from David Green, comprising of six articles and one scholarly monograph, all of which are noted as publications on his academic website. The Iter bibliography lists seven essays which were written for the International Encyclopedia of Military History published in Routledge, New York, of which all but The Conquest of Wales are acknowledged on his website. Finally, on the Bibliography of British and Irish History, a full fourteen scholarly articles, books, and essays can be found, all of which are among those listed on his professional page, though “Medicine and Masculinity: Thomas Walsingham and the death of the Black Prince” contains a typographical error or potentially intentional change in title, possibly to avoid conflict with a similarly themed or titled book.
These resources are individually intended for different audiences, and there is the intention for historical work to be easily accessible as well as appropriately divisible. In addition, there may be certain standards for quality or quantity of work provided which factor in as various bibliographical resources decide which materials to include. In addition timing can play a large role in publication. For example, it is likely that some of these books received boosts from trends, whether as global as war in the Middle East and renewed interest in medieval warfare tactics or as local as a series of historic fairs and festivals at which the book may be presented.

Ori Shavit, Vegans on Top, and the Vegan/Vegetarian Revolution - Lecture at the Hillel House at UVM

Paul Andreas Fischer
10/20/2015
Environmental Studies
        This Monday Ori Shavit came to the Hillel House at UVM and gave a lecture on the vegan lifestyle based on her writing on “Vegans on Top” which raises awareness for the vegan “revolution” that has occurred in Israel in the last decade. Her first order of business was to describe the necessity to change to a vegan lifestyle and to describe her own realization that an all-vegan lifestyle was a choice which she could and did want to make. This was once a, as she described, “fringe phenomenon” and now in America and Israel, the decision to eat vegan foods has become a mainstream one. In Israel, 100’s of thousands have now changed their diet. The change is not limited to Israel, but is global and in the United States there are around half as many vegans per capita.
        Some vegans worry about fitting in socially, and there is a book for this which includes many alternative dishes and some that are nearly identical to non-vegan options called “So You’re Dating a Vegan.” Those who are uncomfortable with their choice publicly may also look to numerous celebrities and important figures who have adopted this lifestyle. Many are athletes, such as Marc Danzig, Ariel Rosenfeld, and even a former weightlifting champion who has maintained a vegan lifestyle for over 25 years. One suggestion she provides to encourage vegans to make their meals more accessible to guests and others who have not made the change completely is to incorporate corn cream into meals and to make use of pates.
        While the presentation was not one which was laden with factual details, the audience was encouraged to seek out the scientific basis for the choices themselves. There were key health, environmental, and social facts are presented. For example, industrial farming techniques involve the electric killing of baby chicks which do not lay enough eggs. This is a way in which the true cost of a dish is hidden. How does this translate into actual savings on a national scale? Among the 5% of Israelis who have become vegan, their food intake has decreased markedly, in fact even commercial chains which have not been historically friendly to vegans now have vegan options including Dominos.
        There are some boundaries which are established early on, which include the convenience and taste of vegan-ism which make adopting this lifestyle easier. Normally, vegans refuse all foods with meat, eggs, cheese, and milk but now many people who are not “fully” vegan supplement their diet with vegan food, a practice which confers many of the benefits that a vegan diet provides. Understanding where the food comes from can be quite as important as deciding where and to whom it will go. While a study from 2014 has shown that Alzheimer’s is actually the leading cause of death in the USA, heart disease is a major cause of mortality. Among vegetarians, heart attack mortality decreased by 24% and in vegans by 57% as shown in a study published by the American Dietetic Association.
        Other ways the true cost of eating traditional agricultural products can be hidden includes the substitution values of agricultural inputs. In Environmental Studies we have learned that the United States is among the greatest contributors to greenhouse gases, and by far the greatest contributor per capita. Part of this negative trend is related to the dietary choices which American have made, which may be sustainable, but also may be limiting growth. Importantly as well, cattle and other animals suffer unnecessary cruelty for the sake of what one chef describes as “a few colors on his pallet.” Seeing this vegan blogger was inspiring. We were able to see the meals, lifestyles, and positive consequences of this difficult and possibly overwhelming change. Investigation of research on this topic proved quite fruitful, and at the end of the evening, it was even worth it for this student to make a pledge to eat vegan daily. Even if unsuccessful, this pledge captures a fair amount of the social, health, and environmental benefits while still maintaining a fair amount of flexibility in dietary choices.

Friday, August 7, 2015

C$50 Vacation Online Class Notes:

“everyone should learn how to program a computer… because it teaches you how to think”
>>Everyone should learn how to think so they can use computers haha.

binary sufficiently large alphabet to describe data, the decimal system extends from this.
description of binary
binary digit - bit
application programming interface

pseudocode:
analytical deconstruction of coding mechanisms in everyday situations, e.g. finding someone’s name in a phone book.

Scrats - graphical programming language

Cryptography - scrambling of information

breakout - implementation of coding skills in game

efficiency in programming - mb and other considerations

finance - application of cs50 to websites

_____________________________________________________
use of 3d printing in plastic and biological endeavors

32 halves of a 4 billion integer set will find any given integer

formalization of algorithms and contemporary nomenclature
use of conditions or branches to increase efficiency in coding, aka corner cases

variables store integers

Conditions handle corner cases

pseudocode use to handle problems
necessity for specificity in computer programming

Use of Scratch 2 for the purpose of familiarization with code structure


Boolean expressions - true or false questions
____________________________________________________________________
Moving from scratch to C
Loops - repetition
conditions - if.. else
BASIC and public accessibility to programming - pseudocode
source code - english like syntax more properly defined and formatted than pseudo code
-> compiler -> object code
compiler is a program which converts source code into object code which is in binary
printf - formatted printing, in C means that which is in parentheses will be printed to the screen
Functions
main, loops, 
int main(void) is normal initiation of general program coding
while (true) = forever
int counter = 0;
while (true)
{
printf(%d\n”, counter);
counter++;
}
a loop may use for: for (i=0, i>0, i<10, i=10)
variables
boolean expressions- use for greater than or less than statements
conditions - printing results from boolean expressions
hypervisor as a layering, allowing emulation of second operating system, in this class linux
Gedit - simple text editor 
Using C to make a program which can create a program
CD - change directory
ls- list
training wheels for the class are in cs50.h which is a header function
editing for errors: thinking about fundamental ideas
getchar- get command
getint- get integer
getstring- get word
equal sign will be equivalent to assign in the class

______________________________________________________________________

Outsourcing input in programming code

#include <stdio.h>
int main(void)
{
printf(“Hello, world\n”);
}
*/ to: *//

#include <cs50.h>
#include <stdio.h>
int main(void)
{
printf(“state your name\n”);
string s = GetString();     */ maybe? *//
printf(“Hello, world%s\n”, s);
}

UI- user interface
GUI - Graphical User Interface

header- including and downloading past functions stored on computer
default main - part of program which is executed first
printf- prints to screen
role of parentheses: surround inputs to the function
\n - new line
; - ends a statement

using DOS to move files and programs, access previous resources

escape sequence - begins with a “\” and initiates a specially procedure
%d, %i, %s, - place holder for decimal, integer, string
values can be stored
char - type of data
float is type of data
int is integer
long is for long long numbers

types of questions
bool - one or zero, yes or no
// is precursor to comment

loops: for, while, or do
variables: declaring variables and assigning values

int counter;
counter = 0;

#include <cs50.h>
#include <stdio.h>

int main(void)
{
printf(“Give me an integer: “);
int x = GetInt();
printf(“Give me another integer: “);
int y = GetInt();

printf(“The sum of %1 and %2 is %1f/n f = x + y”);
}

#include <cs50.h>
#include <stdio.h>

int main(void)
{
printf(“Give me an integer: “);
int n = GetInt();
If (n<0)
{
printf(“You picked a negative number “);
}
Else
{
printf(“You picked a positive number”);
}
___________________________________________________________________

Bug - mistake in program
{
for (int i = 0; i < 10; i++)
{
printf(“*”);
printf(“\n”);
}
}

Curly brace are needed for function

Mac bug in implementation of SSL: one line error
double goto fail; second executes no matter what

abstractions - solving problems without solving problems
look for the main function and follow code logically from there
print-> getstring -> PrintName
PrintName is written within the code, not pre-prorammed into C
prints hello, comma, name

using int and void
void does not return anything, it may print something
int will return an integer, eg. input cubed
the variable must be declared outside of the curly braces in which it is used, anything else will return an error, as the variable is referenced in a section of code in which it does not exist

This is the same reason that header files should almost always be at the top of the code

Scope - local vs. global
extant in variables
representation of information:
types: char, int, float, double, long long
char - one byte, character, 8 bits
int - 4 bytes, or 32 bits, highest number that can be represented is 4 billion
float - 4 bytes, or 32 bits, only have a finite amount of precision
double - 8 bytes, but still finite, problematic in graphics or mathematical formulas
long long - 8 bytes, 2X an int

integer overflow
0 will come after 255

floating-point precision: will throw decimals away in the event an int is used 
use floating values instead, and the decimal will be returned
imprecision will occur at a certain point, however
this creates some severe and legitimate side effects 
Ariane rocket built for the ESA was too fast and overloaded the software which was not prepared to handle the problem
Patriot missile in first Gulf War, suffered the same problem
both iraqi wobble allowed failure of patriot system, as well as a software glitch which prevented tracking of incoming missiles when the radar system was in operation for a “long time”
a tenth of a second could not be expressed in binary

____________________________________________________________________________

Cryptography:
decoder ring and algorithm associated
strings - memory
|z|a|m|y|l|a|
structuring the string into a box^^^

{
string s = GetString();
for (int i = 0; i < strlen(s);  ++i)
{
printf(“%c\n”, s[i]);
}
}

will not compile: needs header files
add: #include <stdio.h> for for and printf and <cs50.h> for string
strlen is in directory not included in header, short for string length
use man (for manual) strlen to find directory: #include <string.h>

if (s != NULL) should be added after GetString in order to prevent program crashing from improper input

!= - does not equal

to improve design, n should be substituted for strlen(s), this is more cumbersome in the program, but will use less cycles of the computer and is a superior design

i++ is the same as i +=1

ASCII American Standard Code for Information Interchanges

for (int i = 65; i <65 + 26; i++) //establishes a loop, which will continue for 26 cycles

It becomes necessary to then treat the i as a char, which allows transcription of the numeric value into a character or series of characters.

&& - and

if (s[i] >= ‘a’ && s[i] <= ‘z’)
{
*/ This allows the program to determine whether an input is a lower case letter or not, by adding 32 to the letter or subtracting 32 from the letter (char), this will change a lowercase letter to an uppercase letter or vice-versa, topper requires #include <ctype.h>*//

so this comes in : printf(“%s\c”, toupper(s[i]));
which simplifies the if and else statement somewhat, but this is where the function refers to, and what it looks like within the original directory

importance of planning in memory allocation:
rather than typing zamyla_|_| and depressing enter to begin on the next line, a computer will represent an end of a string in memory with a great number of zeros so zamyla\0belinda\0gabe\0daven\0
a string in a row of boxes in C is known as an array
array - contiguous sequence of similar data types

#include<cs50.h>
#include<stdio.h>

int main(void)
{
int age1 = GetInt();
int age2 = GetInt();
int age3 = GetInt();
//do something with those numbers
}

The program, however, is limited: if more than 3 or less than 3 ages show up, the program will crash, requiring a rewrite of the code every time it is posted
this can be avoided by declaring a variable each time, which will be saved, say, as i

command-line arguments
encryption algorithm, such as ROT-13, simply rotation 13
examples include caesar, vigenere, the latter of which is more secure and requires a different rotation for each letter

_______________________________________________________________________________
#includes
int main (void)
{
//todo
}
mkdir pset2 - creates a directory
so far main cannot take any arguments, it returns void
int argc, string argv[] can replace void, will allow understanding of what a string is under the hood
arrays use square brackets which are used to declare the size of the array
argv- argument vector, array of arguments, above it is used as a string of arguments
command line arguments:
argc is an int, can be any number
argv is an array, will have multiple values e.g.. argv[0], argv[1] etc…
argc will count the number of strings associated to argv, so cd hello: argc = 2 but hello.c argc =1
#include <cs50.h>
#include <stdio.h>
int main(int argc, string argv[])
{
printf(“hello, %s\n”, argv[1]);
}
by manipulating this number in the brackets, unfettered access may be gained into memory which should not be accessed
#include <cs50.h>
#include <stdio.h>
int main(int argc, string argv[])
{
if (argc == 2)
{
printf(“hello, %s\n”, argv[1]);
return 0;
}
else
{
return 1;
}
}
This serves as a sanity check, which will ensure that only the memory allocated to the program is accessed

string - array of chars

so in each indexes there are array of chars

%c is placeholder for char
syntax - argv[i][j] i denotes the string, j will denote the char within that string to display

CPU cycles necessary for integer order to be established
-bubblesort
-selectionsort
-insertionsort
all of the algorithms are fundamentally equally efficient, because there is a more efficient manner of carrying out the sorting:
others include
-mergesort
-gnomesort


_______________________________________________________________________________

“Shellshock” internet crash
Command line shell, allows programmers to launch programs and features, spying as well
2/3 of all web servers were placed at risk
action: matching, monitering web virals
“born again shell”
is also  a programming language: allows defining your own commands, hello() { echo “hello, world”; }
will create a shell program which prints hello, world
historically, present for over 20 years
in mac: env x=‘() { :; }; echo vulnerable’ bash -c :
this will return whether the computer is vulnerable to bash viruses
rm -rf * instead of vulnerable will delete all files in specified directory
Security requires complete coverage, attack requires only one entry point

reflections on trusting trust

breakout:
n log (n)
log base 2 of 8 is 3

on input of n elements
if in < 2
return
else
sort left half of elements
sort right half of elements
merge sorted halves
 T(n) = T(n/2)+T(n/2)+O(n)
ultimately equals O n log n
that pseudocode is recursive, that is to use cycling

sigma-0.c
adds numbers 1 through n

int sigma(int n);

int main(void)
{
int n;
do
{
printf(“Positive integer please: “;
n = GetInt();
}
while (n>0)
int answer = sigma(n);
printf (“%i\n”, answer);
}
//avoids risk of an infinite loop below
int sigma(int m)
{
if (m <= 1)
return 0;
else
return (m + sigma(m - 1));
}

int sum = 0;
for (int i =1; i <= m; i++)
{
sum += i;
}
return sum;
}


// necessity to access this outside of the loop

text
initialized data
initialized data
heap
|
v
^
|
stack
environment variables

this idea of recursion can cause some problems and will come back in later classes in which programs require hierarchy in trees: there is a necessity not to exceed available memory by allowing these trays of memory to pile on excessively

void swap(int a, int b)
{
int tmp = a;
a = b;
b = tmp;
}

shows necessity for a 3rd content, tmp, to enable a swap of two variables, a and b
when using in a program, the swap values must be returned to the main, and transferred to the original variables

gdb - a program which can be added before running programs to find bugs
syntax: (gdb) run or next or print (variable)

this can be manipulated to explore the program in full and find what the computer thinks is going on at various points and variables throughout the program, line by line
________________________________________________________________________________________________

Monday, August 3, 2015

Picky Eaters: the Plant or the Person?


This research published by Nancy Zucker at the Department of Psychiatry and Behavioral Sciences, Duke Medical School in conjunction with a team of researchers through Duke University Press examines the mental stability of picky eaters in a careful manner. Evaluation of  current and prospective mental stability are both provided and family stability is also examined. This provides an insight into one of the most pervasive of human relations with botanical life: nutrition. Causality of the disorder is  examined or determined as severity of the disorder correlates appropriately with severity of associated mental illnesses and leaves logical deduction of coincidence slim; the success of early and aggressive intervention is highlighted, and the research suggests appropriate action while acknowledging the limitations provided by such a study.
Selective eating disorder has been chosen for the research because of its overwhelming prevalence, and with the data provided in the study, the overwhelming consequences of inaction. It is worth noting that 14-20% of young children suffer from the disorder and co-occurring psychological illness can be seen demonstrated in a medically appropriate manner. The crisis is apparent: nearly 2/3 of these parents who have afflicted children have reported that the disorder was not addressed appropriately by medical professionals. While the research is limited, it is also longitudinal and fills a scientific gap in investigation into the nature of this disorder, a gap which the authors attribute the inaction of medical professionals to.
While the research does not directly address the plant-based eating choices of the children themselves, a systematic evaluation of the families is also done: children with selective eating disorder were significantly more likely to have mothers with mental health histories and those with moderate selective eating disorder (about 3% of the sample) were significantly more likely to have mothers with substance abuse histories. This plays into the psychoactive role of many plant-based compounds which can create physical dependence and demonstrates their effects on the families and individuals around those who make these illegal choices. The research is critical to that of plant biology because both taste and texture of foods are identified as factors in the development of the disorder, and the crisis has been created in which some children may eat enough to sufficiently fit criteria of weight gain and avoid more traditional diagnosis while still not obtaining enough nutrients from plant or animal-based food and drink to maintain psychological or physical health. Finally, it should also be noted that children with severe selective eating disorder have more than twice the rate of depression or social anxiety as those without though those with moderate selective eating disorder, though these diagnoses were substituted with an association with, not necessarily causal, symptoms of ADHD and separation anxiety not seen in severe cases.

Works Cited:

Sunday, July 26, 2015

Botany blog post on Defining heterogeneity as a second level of variation:

On the 19th of June 2015, Web Ecology published a research paper by B. B. Hanberry titled Defining heterogeneity as a second level of variation. The paper evaluates the use of the word heterogeneity in modern literature for the purpose of scientific research. While currently it appears heterogeneity is generally seen as a superior description to homogeneity in many situations, the paper attempts to initiate a discussion on a few logical fallacies which exist in this methodology. Initially this is addressed on terms of grounds of terminology and from a logical perspective the author draws an important distinction in the actual hierarchy of terminology: that in fact heterogeneity is not, as frequently claimed, an existential quantifier, but actually closer to a universal quantifier. While I did not find it clear that heterogeneity was therefore claimed as a definite universal quantifier, use of challenging the grounds of actual use was quite helpful in discovering what this actually meant: because many botanical papers use heterogeneity synonymously with variability, this can create confusion because in fact variability is only one part of multiple different aspects upon which the inclusive term heterogeneity must touch upon. To illustrate this point, a forest fire is used as an example. While heterogeneity is a spatial measurement, abiotic conditions tend to represent variability within the context of the premises provided in the example, that is variation independent of other variables, with a few exceptions such as soil or water. For conditions to be described as homogenous or heterogenous, it follows, the variability or lack thereof must be accessible across spatial, time, or other physical description (which can be extrapolated through a reduction of a given paradigm, as is done in the article with a forest fire).

Hanberry, B. B. "Defining heterogeneity as a second level of variation." Web Ecology 15.1 (2015): 25-28.

Friday, July 10, 2015

Lead exposure, weight gain, hypertension, and early mortality: case study and review

Background:
As increased lead exposure from contaminated marijuana use in the USA and Germany has been confirmed, the potential impacts of severe or light lead exposure are being drawn once again into the public light. The mean adult lead exposure in the USA dropped by 41% from the 1990s to the 2000s from 2.76 μg/dL to 1.64 μg/dL, which has been causally shown to prevent the nearly triple the rate of kidney death and double the rate of peripheral artery disease, which includes cardiovascular death which was present before (Muntner). These low levels of increased lead exposure have been shown to result in a 1.55 increased odds ratio for mortality in all cardio-vascular mortality, after adjusting for all other factors (Menke). This translates into over 7 years of lost life expectancy (Tsai), simply from the cardio-vascular effects of lead toxicity. 
The mean for previous mean lead exposure is now still extant in the higher quartile of adults now that lead exposure has dropped significantly, which makes what was formerly believed to be a safe level of lead exposure very dangerous for those who are still exposed to elevated levels of lead. The expected drop in hypertension from removal of lead from the environment within these boundaries is estimated at 17.5% (Pirkle). Hypertension is a condition which induces an increased hazard ratio of about 1.30 of at least one annual kilogram of weight gain (Stevens), or around 80 kilograms in a lifetime. These weight changes as well as lead exposure have been associated or identified causally with neurological changes, most notably brain lesions (Stewart), which brain imaging and cardiovascular data in this case study have confirmed.
Fortunately for this study and for those who are exposed to lead-infused marijuana or environmental hazards, a study from Veterans affairs has found that increased mortality and negative health effects from lead exposure is only significant with long-term cumulative exposure (Weisskopf). Because the trials were conducted over a period of multiple years, it is likely that there will not be long term or lasting effects once lesions are allowed to heal and with natural expiration of the toxin from the body.
Case study and Results:
Unfortunately, in the case study of a responsible adult marijuana user (5-10 grams at 10% mean THC content per week) in the Northeast of the USA, these sorts of statistical analyses were not useful. In the first run, diastolic blood pressure was over 95 directly after the trial though lead was not initially considered as a factor, with considerations of light alcohol use and high nicotine intake believed to be causally tied to this negative symptom. Re-trial, without regular use of nicotine (substitution of pipe tobacco, with virtually no absorbed nicotine for cigarette tobacco which has between 5 and 13 times the amount of absorbed nicotine) and no use of alcohol, determined lead levels of around 3.5 μg/dL, or levels qualifying as occupational hazard and outside of the range of environmental exposure. With levels taken only one month after the trial had ended and a half-life of lead in the human body of around one month, it can be assumed that these levels at a maximum were at least 7 μg/dL (Barbosa). The increases in blood pressure associated with occupational exposure to lead, which this level still falls into the highest decibel among, are around 10 mm Hg in blood pressure, though due to the young age and good health of the subject and lower expected peak exposure level symptoms may not be as exacerbated as noted in long-term occupational exposure ratios (Glenn).
Physical or cardio-vascular side effects aside, the exposure to lead also has multiple symptoms of neurodegeneration which present themselves and confound earlier attempts to pinpoint neurological effects of THC on the brain, though increased functional connectivity was still noted and remains a confirmed positive effect of marijuana on the brain. The impact of lead on the brain in any amounts on adults or children has been shown to be increased brain lesions and negative on all brain structures as proven using MRI technology (Stewart). This is consistent with the single photon emission computed tomography scan performed which showed increased functional connectivity, but altered blood-flow throughout the brain (Fischer), believed at the time to be the result of specific toxins, though now shown to be an undocumented variable: the environmental toxin lead.

Works Cited:
Barbosa Jr, Fernando, et al. "A critical review of biomarkers used for monitoring human exposure to lead: advantages, limitations, and future needs."Environmental health perspectives (2005): 1669-1674.
Fischer, Paul Andreas. "Single Photon Emission Computed Tomography - Alcohol and Marijuana light use, case study."http://platophilosphy.blogspot.com/2014/07/effects-of-regular-or-light-marijuana.html (2014).
Glenn, Barbara S., et al. "The longitudinal association of lead with blood pressure." Epidemiology 14.1 (2003): 30-36.
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